Add a Buy me a coffee link with a QR code to the UI

The sidebar footer and the end of Settings open a dialog with a QR code
for PayPal, so it works from the TV, plus a direct link for phones.

.github/FUNDING.yml

@@ -0,0 +1 @@
+custom: ["https://paypal.me/oliverkoester"]

.github/release-files.txt

@@ -0,0 +1,6 @@
+# Files included in the release archive.
+# One path per line, relative to the repository root.
+
+patchdl-ps5.elf
+README.md
+LICENSE

.github/workflows/ps5.yml

@@ -0,0 +1,148 @@
+name: PS5 Build and Release
+
+on:
+  push:
+    paths-ignore:
+      - "**/*.md"
+      - "docs/**"
+      - "photos/**"
+  pull_request:
+    paths-ignore:
+      - "**/*.md"
+      - "docs/**"
+      - "photos/**"
+  workflow_dispatch:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}-${{ github.event_name }}
+  cancel-in-progress: false
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+    outputs:
+      archive_name: ${{ steps.package.outputs.archive_name }}
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout PatchDL
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Checkout pacbrew-repo
+        uses: actions/checkout@v4
+        with:
+          repository: ps5-payload-dev/pacbrew-repo
+          path: pacbrew-repo
+
+      - name: Checkout SDK stubs
+        uses: actions/checkout@v4
+        with:
+          repository: ps5-payload-dev/sdk
+          path: ps5-sdk
+
+      - name: Setup build environment
+        run: |
+          sudo apt update
+          sudo apt install -y \
+            autoconf \
+            automake \
+            build-essential \
+            clang-18 \
+            cmake \
+            curl \
+            git \
+            libarchive-tools \
+            libtool \
+            lld-18 \
+            makepkg \
+            meson \
+            ninja-build \
+            pacman-package-manager \
+            pkg-config \
+            python3 \
+            zip
+
+      - name: Build and install pacbrew packages
+        shell: bash
+        run: |
+          set -euo pipefail
+
+          build_and_install() {
+            local package_dir="$1"
+            pushd "pacbrew-repo/${package_dir}"
+            makepkg -c -f
+            sudo pacman --noconfirm -U ./ps5-payload-*.pkg.tar.gz
+            popd
+          }
+
+          build_and_install sdk
+          build_and_install libcxx
+          build_and_install zlib
+          build_and_install zstd
+          build_and_install openssl
+          build_and_install libpsl
+          build_and_install curl
+
+      - name: Build payload
+        env:
+          PS5_PAYLOAD_SDK: /opt/ps5-payload-sdk
+          PS5_SCE_STUBS_DIR: ${{ github.workspace }}/ps5-sdk/sce_stubs
+        run: |
+          scripts/build_ps5.sh clean all
+
+      - name: Create release archive
+        id: package
+        shell: bash
+        run: |
+          set -euo pipefail
+          version_tag="$(git describe --abbrev=6 --dirty --always --tags 2>/dev/null || echo "${GITHUB_SHA::7}")"
+          archive_name="PatchDL_${version_tag}.zip"
+          manifest_file=".github/release-files.txt"
+
+          mapfile -t release_files < <(grep -Ev '^[[:space:]]*(#|$)' "${manifest_file}")
+
+          if [ "${#release_files[@]}" -eq 0 ]; then
+            echo "Release manifest is empty: ${manifest_file}" >&2
+            exit 1
+          fi
+
+          for release_file in "${release_files[@]}"; do
+            if [ ! -f "${release_file}" ]; then
+              echo "Missing release file: ${release_file}" >&2
+              exit 1
+            fi
+          done
+
+          zip -9 "${archive_name}" "${release_files[@]}"
+
+          echo "archive_name=${archive_name}" >> "$GITHUB_OUTPUT"
+
+      - name: Upload build artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: ${{ steps.package.outputs.archive_name }}
+          path: ${{ steps.package.outputs.archive_name }}
+          if-no-files-found: error
+
+  release:
+    needs: build
+    permissions:
+      contents: write
+    if: startsWith(github.ref, 'refs/tags/')
+    runs-on: ubuntu-latest
+    steps:
+      - name: Download build artifacts
+        uses: actions/download-artifact@v4
+        with:
+          name: ${{ needs.build.outputs.archive_name }}
+          path: dist
+
+      - name: Create GitHub Release
+        uses: softprops/action-gh-release@v2
+        with:
+          tag_name: ${{ github.ref_name }}
+          generate_release_notes: true
+          files: dist/${{ needs.build.outputs.archive_name }}

LICENSE

@@ -0,0 +1,674 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
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+  12. No Surrender of Others' Freedom.
+
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+
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+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
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+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
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+    Copyright (C) <year>  <name of author>
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+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
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+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
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+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
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+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
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+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
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+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.

Makefile

@@ -20,10 +20,16 @@ SRCS := src/main.c \
         src/patchdl_scan.c \
         src/patchdl_appdb.c \
         src/patchdl_net.c \
+        src/patchdl_prospero.c \
         src/patchdl_resolve.c \
         src/patchdl_verxml.c \
         src/patchdl_install.c \
-        src/patchdl_notify.c
+        src/patchdl_notify.c \
+        src/patchdl_tile.c
+
+# patchdl_tile.c uses .incbin to embed param.json + icon0.png; touching the
+# assets must trigger a rebuild.
+TILE_ASSETS := assets/param.json assets/icon0.png
 
 WEB_ASSETS := web/index.html web/styles.css web/app.js
 GEN_SRCS := $(patsubst web/%,gen/web/%.c,$(WEB_ASSETS))
@@ -56,8 +62,8 @@ gen/web/%.c: web/% scripts/gen_asset_module.py | gen/web
 $(SQLITE_OBJ): $(SQLITE_DIR)/sqlite3.c
 	$(CC) $(SQLITE_CFLAGS) -c -o $@ $<
 
-$(BIN): $(SRCS) $(GEN_SRCS) $(SQLITE_OBJ)
-	$(CC) $(CFLAGS) -o $@ $^ $(LDADD)
+$(BIN): $(SRCS) $(GEN_SRCS) $(SQLITE_OBJ) $(TILE_ASSETS)
+	$(CC) $(CFLAGS) -o $@ $(SRCS) $(GEN_SRCS) $(SQLITE_OBJ) $(LDADD)
 
 test: $(BIN)
 	$(PS5_DEPLOY) -h $(PS5_HOST) -p $(PS5_PORT) $^

README.md

@@ -1,123 +1,152 @@
-# PatchDL
+<h1 align="center">PatchDL</h1>
 
-A standalone PlayStation 5 ELF payload that downloads and installs official game
-patches on your terms. It serves its own dark-mode web UI and runs without
-etaHEN.
+<p align="center">
+  <img src="docs/images/hero.jpg" alt="PatchDL in a desktop browser and on a phone, fetching a patch that runs on an older firmware" width="900">
+</p>
 
-PatchDL is built for setups where nanoDNS blocks Sony's servers for the whole
-console. It resolves the Sony patch CDN on its own DNS path, so the rest of the
-system stays offline and only the patches you pick get fetched.
+<p align="center">
+  <b>Official updates for your PS5 and PS4 games, from any browser.</b><br>
+  PatchDL finds the newest update for every PS5 and PS4 game on your console, downloads it at full speed and installs it.<br>
+  Run it from your phone, your laptop or the PS5 itself.
+</p>
 
-by Knutwurst
+<p align="center">
+  <img src="https://img.shields.io/github/v/release/knutwurst/ps5-patchdl?style=for-the-badge&label=release&color=22c55e" alt="Latest release">
+  <img src="https://img.shields.io/github/downloads/knutwurst/ps5-patchdl/total?style=for-the-badge&color=22c55e" alt="Downloads">
+  <img src="https://img.shields.io/badge/games-PS5%20%7C%20PS4-22c55e?style=for-the-badge" alt="PS5 and PS4 games">
+  <img src="https://img.shields.io/badge/FW-1.00%E2%80%9313.60-22c55e?style=for-the-badge" alt="Firmware 1.00 to 13.60">
+  <img src="https://img.shields.io/badge/UI-any%20browser-22c55e?style=for-the-badge" alt="Web UI in any browser">
+  <img src="https://img.shields.io/github/license/knutwurst/ps5-patchdl?style=for-the-badge&color=3a3a3a" alt="License">
+</p>
 
-## What it does
+<p align="center">
+  <a href="https://github.com/knutwurst/ps5-patchdl/releases/latest">
+    <img src="https://img.shields.io/badge/Download-latest%20release-22c55e?style=for-the-badge&logo=github&logoColor=white" alt="Download the latest release" height="42">
+  </a>
+</p>
 
-- Scans installed titles and classifies each: genuine install, ShadowMountPlus
-  mount, preinstall, or unknown.
-- Reads the title name, installed version, and Sony `version.xml` URL from the
-  PS5 app database.
-- Fetches each title's `version.xml` past nanoDNS (a raw DNS query to 1.1.1.1)
-  and verifies TLS against the pinned SCEI DNAS root.
-- Picks the newest patch compatible with the current firmware
-  (`system_ver <= firmware`), so an update never forces a firmware upgrade.
-- Downloads the patch from Sony's manifest pieces into one local `.pkg`, then
-  installs it through Sony's AppInstUtil service.
+<p align="center">
+  If you like what I do, you can buy me a coffee*:
+  <a href="https://paypal.me/oliverkoester"><img src="https://img.shields.io/badge/Donate-PayPal-22c55e?style=flat-square&logo=paypal&logoColor=white" alt="Donate via PayPal"></a><br>
+  <sub>*It doesn't have to be a generous donation. A few cents are enough to show me who is interested in further development. So the motivation stays and I just know that I am not programming for the bin ;)</sub>
+</p>
 
-## Downloading
+---
 
-PatchDL pulls each patch over a pool of connections instead of one stream, which
-lifts the ~7 MB/s per-connection ceiling on the Sony CDN. Set the connection
-count (1 to 16) in Settings with the stepper; the change applies live, with no
-payload restart. One patch downloads at a time and further requests queue.
+## Highlights
 
-Downloads survive interruptions:
+- **PS5 and PS4 games.** PatchDL updates both, straight from Sony's servers. PS4 updates land where the console keeps them, next to the game.
+- **Your whole library at a glance.** Every installed game shows up with its icon, its version and the newest update Sony offers for it, sorted A to Z. Install or remove a game and the list follows within seconds, no restart needed.
+- **Update all.** One click queues every game that has an update. PatchDL works through the queue and installs each update as soon as it lands.
+- **Fast downloads.** Up to 16 parallel connections per update. Change the number in Settings while a download runs.
+- **Survives reboots.** Pause, resume, or lose power: PatchDL saves progress after every finished piece and continues where it stopped.
+- **Made for your firmware.** You only see updates your console can run. When Sony's newest patch needs a newer firmware, PatchDL finds the newest one that still runs on yours and helps you get it: scan a QR code with your phone, copy one link, and the PS5 does the rest.
+- **Knows where each game came from.** PatchDL checks every game's package and recognizes disc and PlayStation Store installs. It only ever patches games Sony signed.
+- **Checked against Sony's checksums.** Turn on verification and PatchDL compares every piece with the SHA-256 Sony publishes for it.
+- **Reuses what's already there.** If the update package is already on the console, PatchDL checks it against Sony's checksums and downloads only the pieces that don't match.
+- **Keeps your storage tidy.** After an install, PatchDL confirms the game runs the new version and then deletes the package. Prefer to keep packages? Turn that off, and Settings lists every package on the console with its size and version, ready to delete.
+- **A tile on your home screen.** One toggle adds PatchDL to the PS5 home screen. Tap it and the UI opens in the console's browser.
+- **Live progress.** A banner at the top shows the current game, speed, time left and where you are in the queue. During an install, the game's card shows how much of the update the console has read.
 
-- **Resume across a reboot.** PatchDL records progress per manifest piece in a
-  sidecar beside the `.pkg`, written after every completed piece, so a reboot or
-  relaunch continues where it stopped.
-- **Pause, Resume, Cancel.** Pause keeps the partial file, Resume continues it,
-  Cancel deletes it. All three work at any point in a download.
-- **Verification.** Turn on "Verify downloaded pieces (SHA-256)" to check each
-  piece against its manifest hash while downloading. After a download you can
-  also verify the assembled package on-device against Sony's per-piece hashes
-  (`GET /api/pkgverify/<title_id>`).
+## Screenshots
 
-Patches download to `/data/patchdl` on the internal SSD. Large retail updates
-run tens of GB.
+<table>
+  <tr>
+    <td align="center" width="50%"><img src="docs/images/games.jpg" width="420" alt="Games view with a running download"><br><sub><b>Games</b> &nbsp;·&nbsp; every update waiting for you, one click away</sub></td>
+    <td align="center" width="50%"><img src="docs/images/library.jpg" width="420" alt="Full library with game icons, sorted by name"><br><sub><b>Library</b> &nbsp;·&nbsp; icons, versions and firmware needs, A to Z</sub></td>
+  </tr>
+  <tr>
+    <td align="center" width="50%"><img src="docs/images/oldfw.jpg" width="420" alt="QR code on the TV and the step-by-step guide on a phone"><br><sub><b>Older firmware</b> &nbsp;·&nbsp; scan on the TV, paste one link on your phone</sub></td>
+    <td align="center" width="50%"><img src="docs/images/settings.jpg" width="420" alt="Settings view"><br><sub><b>Settings</b> &nbsp;·&nbsp; changes apply right away, no restart</sub></td>
+  </tr>
+  <tr>
+    <td align="center" colspan="2"><img src="docs/images/tile-homescreen.jpg" width="420" alt="PatchDL tile on the PS5 home screen"><br><sub><b>Home screen</b> &nbsp;·&nbsp; the PatchDL tile on a real PS5</sub></td>
+  </tr>
+</table>
 
-## Safety model
+## Fits any screen
 
-Deny-by-default. A patch installs only for a genuine install, and only when the
-patch metadata targets the installed game:
+Start an update from the couch with your phone, check on it from your laptop, or open it on the TV. The UI adapts to whatever screen it's on.
 
-| Source                | Check | Download | Install |
-|-----------------------|-------|----------|---------|
-| official              | yes   | yes      | yes     |
-| shadowmount           | yes   | yes      | no      |
-| preinstall / unknown  | yes   | no       | no      |
+<p align="center">
+  <img src="docs/images/phones.jpg" alt="PatchDL on a phone: game list and Settings" width="560">
+</p>
 
-Two guards stop the wrong target being installed: the patch target id (from
-`version.xml` / `manifest_url`) must match the installed game, and the install
-call receives the installed game's content id from app.db. PatchDL refuses a
-true target-title mismatch rather than installing a phantom title.
+## Get started
 
-All writes stay under `/data/patchdl`. PatchDL never writes to the system
-partition and never touches firmware.
+1. Download `patchdl_<version>.elf` from the [latest release](https://github.com/knutwurst/ps5-patchdl/releases/latest).
+2. Send it to your PS5 with the ELF loader you already use.
+3. A notification on the TV shows the address, for example `http://192.168.0.42:12880/`. Open it in any browser on your network.
+4. Optional: switch on **Home-screen shortcut** in Settings to get the PatchDL tile.
 
-## Settings
+**You need** a PS5 that can load ELF payloads. PatchDL runs on firmware 1.00 to 13.60 (tested on 11.60 and 13.60).
 
-Settings persist to `/data/patchdl/config.json` and survive a restart:
+## Good to know
 
-- Default policy (allow or deny) and a per-game enable toggle.
-- Install after download, as a global default with a per-game override.
-- Delete the PKG after a successful install.
-- Verify downloaded pieces (SHA-256).
-- Parallel download connections (1 to 16), applied live.
+**Does PatchDL download games?**
+No. It fetches updates for games that are already installed on your console. Nothing else.
 
-## Build
+**Which games does PatchDL update?**
+PS5 and PS4 games you installed from disc or from the PlayStation Store. PatchDL reads each game's package before it offers anything, and it leaves every other title alone.
 
-Requires `ps5-payload-dev/sdk`. The network and install features need the
-prebuilt libcurl + OpenSSL from `ps5-payload-dev/pacbrew-repo` in the SDK sysroot
-(`target/user/homebrew`); `scripts/build_ps5.sh` enables them when present.
-libmicrohttpd is vendored under `vendor/etahen`, SQLite under `vendor/sqlite`.
+**Where do the updates come from?**
+From Sony's official update servers, the same files your console downloads on its own. PatchDL downloads only from a short list of PlayStation CDN hosts. To find older patches it also asks [Prospero Patches](https://prosperopatches.com/) which versions exist for a game. That lookup sends the game's title ID and nothing else.
+
+**Can I get an older patch that runs on my firmware?**
+Yes. Sony still hosts older patches, but its servers only tell your console about the newest one. When that one needs a newer firmware, PatchDL looks up the version history on [Prospero Patches](https://prosperopatches.com/) and lists the game under *Updates* with an **Old FW patch** button. Tap it and scan the QR code with your phone. Open the game on Prospero, pick the version PatchDL names (confirm the human check if one shows up) and copy the **SC** link. Paste it on your phone, and the PS5 downloads the patch from Sony and handles it like any other update.
+
+**Does it change the updates?**
+No. Each package stays exactly as Sony published it, and the console's own installer applies it.
+
+**Does it delete the package after installing?**
+Only once the install is confirmed: the game reports the new version and the console's installer recorded this exact package. If either check fails, the package stays. Switch off **Delete PKG after install** in Settings to keep every package.
+
+**Will it touch my system software?**
+No. PatchDL never downloads system software, and it only offers game updates that run on the firmware you have.
+
+**What about disc games?**
+Put the disc in, same as with any update.
+
+**What happens if the power goes out?**
+Start PatchDL again and press Resume. Finished pieces stay on disk.
+
+## Disclaimer
+
+PatchDL is an independent project. It is not affiliated with, endorsed by or sponsored by Sony Interactive Entertainment. "PlayStation" and "PS5" are trademarks of Sony Interactive Entertainment Inc. and appear here only to name the console PatchDL works with.
+
+PatchDL downloads official, unmodified game updates that Sony publishes for games already installed on your console. It does not download games, does not contain or distribute Sony software, keys or game content, and does not install unsigned or modified packages. Use it with games you own, and follow the laws of your country and the terms that apply to you. This project does not support piracy, and issues about pirated content will be closed.
+
+<details>
+<summary><b>Build from source</b></summary>
+
+<br>
 
 ```sh
 scripts/build_ps5.sh        # produces patchdl-ps5.elf
 ```
 
-## Deploy
+You need the [ps5-payload-dev SDK](https://github.com/ps5-payload-dev/sdk), version 0.44 or newer for firmware 1.00 to 13.60, with `libcurl` and `OpenSSL` from its [pacbrew-repo](https://github.com/ps5-payload-dev/pacbrew-repo). `libmicrohttpd` and SQLite are vendored. GitHub Actions builds every push; tagged builds become releases.
 
-This console uses the BD-JB autoloader with itsPLK's Payload Manager on port 8084
-(not a 9021 elfldr). `scripts/deploy_ps5.sh` uploads the version-named ELF and
-launches it; the payload replaces any running instance.
+To try a build on your own console:
 
 ```sh
 PS5_HOST=<console-ip> scripts/deploy_ps5.sh
 ```
 
-On start it shows an on-screen notification with the URL. Open the web UI at:
+</details>
 
-```text
-http://<console-ip>:12880/
-```
+## Credits
 
-## Status
+PatchDL is written in C and builds on [libmicrohttpd](https://www.gnu.org/software/libmicrohttpd/), [libcurl](https://curl.se/), [OpenSSL](https://www.openssl.org/), [SQLite](https://sqlite.org/) and the [ps5-payload-dev SDK](https://github.com/ps5-payload-dev/sdk). The version history behind older patches comes from [Prospero Patches](https://prosperopatches.com/). Thanks to everyone behind them.
 
-Verified on firmware 11.60: title scan, source classification, version
-resolution past the nanoDNS block, firmware-compatibility filtering, the parallel
-download pool, reboot-safe resume, and on-device SHA-256 verification. A full
-Dead Island 2 update (61.6 GB) downloaded and verified byte-perfect across
-several reboots.
+## Support
 
-Install works for same-region patches, where Sony stores the patch bytes under
-the installed game's own title id.
+If you like what I do, you can buy me a coffee*: [![Donate](https://img.shields.io/badge/Donate-PayPal-22c55e?style=flat-square&logo=paypal&logoColor=white)](https://paypal.me/oliverkoester)
 
-Cross-region patches are a known limitation. Sony sometimes packages a regional
-patch under a different (master) storage title and ships it as a debug-magic
-container. PatchDL downloads such a patch and verifies it against Sony's hashes,
-but the on-console installer (`InstallByPackage`) rejects it on 11.60, and the
-homebrew alternative (BGFT register) returns "not supported" outside the system
-process. Installing that class of patch needs Sony's authenticated updater, which
-nanoDNS blocks. The web UI marks a title "Installing…" and reads progress from the
-PS5's own notifications. Disc games need the disc inserted for their patch to
-apply, which is a normal Sony requirement.
+<sub>*It doesn't have to be a generous donation. A few cents are enough to show me who is interested in further development. So the motivation stays and I just know that I am not programming for the bin ;)</sub>
+
+## License
+
+PatchDL is free software under the **GNU General Public License v3.0 or later**. See [LICENSE](LICENSE). Use it, study it, change it, share it. Forks stay under the same license.
+
+Copyright © 2026 Knutwurst.

assets/icon0.svg

@@ -0,0 +1,20 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512">
+  <defs>
+    <linearGradient id="bg" x1="0" y1="0" x2="0" y2="1">
+      <stop offset="0" stop-color="#0f2a1e"/>
+      <stop offset="1" stop-color="#0a1612"/>
+    </linearGradient>
+    <linearGradient id="badge" x1="0" y1="0" x2="0" y2="1">
+      <stop offset="0" stop-color="#21d07a"/>
+      <stop offset="1" stop-color="#179a59"/>
+    </linearGradient>
+  </defs>
+  <rect width="512" height="512" rx="72" fill="url(#bg)"/>
+  <rect x="56" y="56" width="160" height="160" rx="36" fill="url(#badge)"/>
+  <text x="136" y="178" font-family="Helvetica,Arial,sans-serif" font-size="116"
+        font-weight="800" fill="#0a1612" text-anchor="middle">PD</text>
+  <text x="256" y="346" font-family="Helvetica,Arial,sans-serif" font-size="80"
+        font-weight="700" fill="#e7ecea" text-anchor="middle">PatchDL</text>
+  <text x="256" y="404" font-family="Helvetica,Arial,sans-serif" font-size="32"
+        font-weight="500" fill="#7a8f86" text-anchor="middle">PS5 Patch Tool</text>
+</svg>

assets/param.json

@@ -0,0 +1,10 @@
+{
+    "titleId": "PTDL00001",
+    "deeplinkUri": "http://127.0.0.1:12880/",
+    "localizedParameters": {
+        "defaultLanguage": "en-US",
+        "en-US": {
+            "titleName": "PatchDL"
+        }
+    }
+}

scripts/deploy_ps5.sh

@@ -19,7 +19,7 @@ VERSION=$(sed -n 's/.*PATCHDL_VERSION[^"]*"\([^"]*\)".*/\1/p' "$ROOT_DIR/src/pat
 SRC_ELF="$ROOT_DIR/patchdl-ps5.elf"
 [ -f "$SRC_ELF" ] || { echo "build first: $SRC_ELF missing" >&2; exit 1; }
 
-UP_NAME="patchdl-ps5-v${VERSION}.elf"
+UP_NAME="patchdl_${VERSION}.elf"
 TMP_ELF="$ROOT_DIR/$UP_NAME"
 cp "$SRC_ELF" "$TMP_ELF"
 

src/main.c

@@ -1,3 +1,12 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later
+ * Copyright (C) 2026 Knutwurst
+ *
+ * PatchDL is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free
+ * Software Foundation, either version 3 of the License, or (at your option)
+ * any later version. See the LICENSE file in the project root for details.
+ */
+
 #include <signal.h>
 #include <stdio.h>
 #include <stdlib.h>

src/patchdl_appdb.c

@@ -1,12 +1,76 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later
+ * Copyright (C) 2026 Knutwurst
+ *
+ * PatchDL is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free
+ * Software Foundation, either version 3 of the License, or (at your option)
+ * any later version. See the LICENSE file in the project root for details.
+ */
+
 #include "patchdl_appdb.h"
 
+#include <errno.h>
+#include <fcntl.h>
 #include <sqlite3.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <unistd.h>
 
 #define APP_DB_URI \
     "file:/system_data/priv/mms/app.db?immutable=1"
+/* A rescan can't open app.db by a relative path: SQLite turns it into an
+   absolute one with getcwd(), which resolves inside our own root again. So
+   it copies the file out through the working directory (the system root,
+   see patchdl_scan) and opens the copy. */
+#define APP_DB_REL      "system_data/priv/mms/app.db"
+#define APP_DB_SNAPSHOT "/data/patchdl/.appdb.snapshot"
+#define APP_DB_URI_SNAPSHOT "file:" APP_DB_SNAPSHOT "?immutable=1"
+
+static char g_appdb_err[64];
+
+const char *
+patchdl_appdb_error(void) {
+    return g_appdb_err;
+}
+
+static int
+snapshot_appdb(void) {
+    char   *buf;
+    ssize_t n;
+    int     in, out, rc = 0;
+
+    if ((in = open(APP_DB_REL, O_RDONLY | O_CLOEXEC)) < 0) {
+        snprintf(g_appdb_err, sizeof g_appdb_err, "open app.db errno %d", errno);
+        return -1;
+    }
+    out = open(APP_DB_SNAPSHOT, O_WRONLY | O_CREAT | O_TRUNC | O_CLOEXEC, 0600);
+    if (out < 0) {
+        snprintf(g_appdb_err, sizeof g_appdb_err, "open snapshot errno %d", errno);
+        close(in);
+        return -1;
+    }
+    if (!(buf = malloc(65536))) {
+        close(in);
+        close(out);
+        return -1;
+    }
+    while ((n = read(in, buf, 65536)) > 0)
+        if (write(out, buf, (size_t)n) != n) {
+            snprintf(g_appdb_err, sizeof g_appdb_err, "write snapshot errno %d", errno);
+            rc = -1;
+            break;
+        }
+    if (n < 0) {
+        snprintf(g_appdb_err, sizeof g_appdb_err, "read app.db errno %d", errno);
+        rc = -1;
+    }
+    free(buf);
+    close(in);
+    close(out);
+    if (rc) unlink(APP_DB_SNAPSHOT);
+    return rc;
+}
 
 #define APPDB_MAX 1024
 
@@ -51,8 +115,9 @@ json_str(const char *json, const char *key, char *out, size_t out_sz) {
         out[--len] = '\0';
 }
 
-int
-patchdl_appdb_load(patchdl_appinfo_t **out, size_t *count) {
+static int
+load_db(const char *uri, patchdl_appinfo_t **out, size_t *count) {
+    int           step = SQLITE_DONE;
     sqlite3      *db = NULL;
     sqlite3_stmt *stmt = NULL;
     patchdl_appinfo_t *arr;
@@ -61,8 +126,12 @@ patchdl_appdb_load(patchdl_appinfo_t **out, size_t *count) {
     *out = NULL;
     *count = 0;
 
-    if (sqlite3_open_v2(APP_DB_URI, &db,
-                        SQLITE_OPEN_READONLY | SQLITE_OPEN_URI, NULL) != SQLITE_OK) {
+    /* FULLMUTEX: today only the startup thread calls this, but future code
+       paths (a manual rescan triggered from the HTTP thread) would otherwise
+       race the SQLite handle. Cost is one mutex per call. */
+    if (sqlite3_open_v2(uri, &db,
+                        SQLITE_OPEN_READONLY | SQLITE_OPEN_URI |
+                        SQLITE_OPEN_FULLMUTEX, NULL) != SQLITE_OK) {
         if (db) sqlite3_close(db);
         return -1;
     }
@@ -81,7 +150,7 @@ patchdl_appdb_load(patchdl_appinfo_t **out, size_t *count) {
         return -1;
     }
 
-    while (sqlite3_step(stmt) == SQLITE_ROW && n < APPDB_MAX) {
+    while ((step = sqlite3_step(stmt)) == SQLITE_ROW && n < APPDB_MAX) {
         patchdl_appinfo_t *e = &arr[n];
         const char *tid  = (const char *)sqlite3_column_text(stmt, 0);
         const char *name = (const char *)sqlite3_column_text(stmt, 1);
@@ -95,13 +164,44 @@ patchdl_appdb_load(patchdl_appinfo_t **out, size_t *count) {
         if (json) {
             json_str(json, "CONTENT_VERSION", e->content_version,
                      sizeof(e->content_version));
+            /* PS4 titles carry no CONTENT_VERSION; APP_VER is theirs, and
+               it includes an installed patch. */
+            if (!e->content_version[0])
+                json_str(json, "APP_VER", e->content_version,
+                         sizeof(e->content_version));
             json_str(json, "VERSION_FILE_URI", e->version_file_uri,
                      sizeof(e->version_file_uri));
         }
         n++;
     }
-
     sqlite3_finalize(stmt);
+    /* Anything but the end of the table (or the row cap) means the read
+       broke off, e.g. on a copy taken while the console wrote the file:
+       report failure instead of a list that silently lacks titles. */
+    if (step != SQLITE_DONE && step != SQLITE_ROW) {
+        free(arr);
+        sqlite3_close(db);
+        return -1;
+    }
+
+    /* Icon paths in a separate query: if a firmware lacks the icon0Info
+       column, only the icons go missing, not the whole title list. */
+    if (sqlite3_prepare_v2(db,
+            "SELECT titleId, icon0Info FROM tbl_contentinfo "
+            "WHERE icon0Info IS NOT NULL AND icon0Info != '';",
+            -1, &stmt, NULL) == SQLITE_OK) {
+        while (sqlite3_step(stmt) == SQLITE_ROW) {
+            const char *tid  = (const char *)sqlite3_column_text(stmt, 0);
+            const char *icon = (const char *)sqlite3_column_text(stmt, 1);
+            patchdl_appinfo_t *e;
+            if (!tid || !icon) continue;
+            e = (patchdl_appinfo_t *)patchdl_appdb_find(arr, n, tid);
+            if (!e || e->icon_path[0]) continue;
+            strncpy(e->icon_path, icon, sizeof(e->icon_path) - 1);
+            e->icon_path[strcspn(e->icon_path, "?")] = '\0';
+        }
+        sqlite3_finalize(stmt);
+    }
     sqlite3_close(db);
 
     *out = arr;
@@ -109,6 +209,18 @@ patchdl_appdb_load(patchdl_appinfo_t **out, size_t *count) {
     return 0;
 }
 
+int
+patchdl_appdb_load(patchdl_appinfo_t **out, size_t *count, int relative) {
+    int rc;
+    *out = NULL;
+    *count = 0;
+    if (!relative) return load_db(APP_DB_URI, out, count);
+    if (snapshot_appdb()) return -2;
+    rc = load_db(APP_DB_URI_SNAPSHOT, out, count);
+    unlink(APP_DB_SNAPSHOT);
+    return rc;
+}
+
 void
 patchdl_appdb_free(patchdl_appinfo_t *arr) {
     free(arr);

src/patchdl_appdb.h

@@ -1,3 +1,12 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later
+ * Copyright (C) 2026 Knutwurst
+ *
+ * PatchDL is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free
+ * Software Foundation, either version 3 of the License, or (at your option)
+ * any later version. See the LICENSE file in the project root for details.
+ */
+
 #pragma once
 
 #include <stddef.h>
@@ -8,13 +17,17 @@ typedef struct {
     char content_id[64];
     char content_version[16];
     char version_file_uri[256]; /* Sony version.xml URL (UUID assigned) */
+    char icon_path[256];        /* icon0Info without its "?ts=" suffix, or "" */
 } patchdl_appinfo_t;
 
 /* Read the PS5 app database (tbl_contentinfo) for installed-title metadata.
    Returns 0 on success with a malloc'd array (caller frees with
-   patchdl_appdb_free). Requires the root-vnode swap + elevated authid to be
-   in effect (the caller arranges this). */
-int  patchdl_appdb_load(patchdl_appinfo_t **out, size_t *count);
+   patchdl_appdb_free). Requires elevated authid plus either the root-vnode
+   swap or, with `relative` set, the working directory at the system root
+   (the caller arranges this). */
+int  patchdl_appdb_load(patchdl_appinfo_t **out, size_t *count, int relative);
+/* Why the last relative load failed to copy app.db (errno text), or "". */
+const char *patchdl_appdb_error(void);
 void patchdl_appdb_free(patchdl_appinfo_t *arr);
 
 const patchdl_appinfo_t *patchdl_appdb_find(const patchdl_appinfo_t *arr,

src/patchdl_assets.c

@@ -1,3 +1,12 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later
+ * Copyright (C) 2026 Knutwurst
+ *
+ * PatchDL is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free
+ * Software Foundation, either version 3 of the License, or (at your option)
+ * any later version. See the LICENSE file in the project root for details.
+ */
+
 #include "patchdl_assets.h"
 
 #include <stdlib.h>

src/patchdl_assets.h

@@ -1,3 +1,12 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later
+ * Copyright (C) 2026 Knutwurst
+ *
+ * PatchDL is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free
+ * Software Foundation, either version 3 of the License, or (at your option)
+ * any later version. See the LICENSE file in the project root for details.
+ */
+
 #pragma once
 
 #include <stddef.h>

src/patchdl_ca.h

@@ -1,3 +1,12 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later
+ * Copyright (C) 2026 Knutwurst
+ *
+ * PatchDL is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free
+ * Software Foundation, either version 3 of the License, or (at your option)
+ * any later version. See the LICENSE file in the project root for details.
+ */
+
 #pragma once
 
 /*

src/patchdl_fw.c

@@ -1,3 +1,12 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later
+ * Copyright (C) 2026 Knutwurst
+ *
+ * PatchDL is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free
+ * Software Foundation, either version 3 of the License, or (at your option)
+ * any later version. See the LICENSE file in the project root for details.
+ */
+
 #include "patchdl_fw.h"
 
 #include <ps5/kernel.h>

src/patchdl_fw.h

@@ -1,3 +1,12 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later
+ * Copyright (C) 2026 Knutwurst
+ *
+ * PatchDL is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free
+ * Software Foundation, either version 3 of the License, or (at your option)
+ * any later version. See the LICENSE file in the project root for details.
+ */
+
 #pragma once
 
 #include <stdint.h>

src/patchdl_install.c

@@ -1,3 +1,12 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later
+ * Copyright (C) 2026 Knutwurst
+ *
+ * PatchDL is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free
+ * Software Foundation, either version 3 of the License, or (at your option)
+ * any later version. See the LICENSE file in the project root for details.
+ */
+
 #include "patchdl_install.h"
 
 #include <arpa/inet.h>
@@ -7,9 +16,13 @@
 
 #include <pthread.h>
 #include <stddef.h>
+#include <stdbool.h>
 #include <stdint.h>
+#include <stdatomic.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
+#include <unistd.h>
 #include <sys/socket.h>
 #include <sys/stat.h>
 
@@ -36,6 +49,12 @@ typedef struct {
     const char *content_id;
     const char *content_name;
     const char *icon_url;
+    /* Sony reads past the six pointers. The 8 bytes after icon_url select the
+       install mode: 0 = plain install, other values take a patch/cancel path
+       that refuses with 0x80B2116F. Left as stack garbage they caused our
+       intermittent 0x80B2116F (measured by ps5upload on FW 13.60). */
+    uint64_t    unknown_30;
+    uint64_t    reserved[7];
 } ai_meta_info_t;
 
 typedef struct {
@@ -45,6 +64,42 @@ typedef struct {
     long unknown[810];
 } ai_playgo_info_t;
 
+typedef struct {
+    int32_t error_code;
+    int32_t version;
+    char    description[512];
+    char    type[9];
+} ai_install_error_t;
+
+typedef struct {
+    char               status[16];
+    char               src_type[8];
+    uint32_t           remain_time;
+    uint64_t           downloaded_size;
+    uint64_t           initial_chunk_size;
+    uint64_t           total_size;
+    uint32_t           promote_progress;
+    ai_install_error_t error_info;
+    int32_t            local_copy_percent;
+    bool               is_copy_only;
+    char               _pad[2048]; /* safety margin — actual Sony struct may be larger */
+} ai_install_status_t;
+
+/* Padded buffers for Sony output writes whose actual size is reverse-engineered.
+   The visible content fits in 0x30 (content_id) / 16 (title_id) bytes, but the
+   firmware may NUL-pad or write more. Used as caller-side temporaries that are
+   then copy_bounded()-d into the right-sized destination. */
+#define AI_CONTENTID_OUT_SIZE    256
+#define AI_TITLEID_OUT_SIZE      128
+
+#define STATIC_ASSERT(c, n) typedef char static_assert_##n[(c) ? 1 : -1]
+STATIC_ASSERT(sizeof(ai_pkg_info_t) == 0x38, pkg_info_size);
+STATIC_ASSERT(sizeof(ai_meta_info_t) == 0x70, meta_info_size);
+STATIC_ASSERT(sizeof(ai_playgo_info_t) == 0x2700, playgo_info_size);
+STATIC_ASSERT(offsetof(ai_meta_info_t, uri) == 0, meta_uri_offset);
+STATIC_ASSERT(offsetof(ai_meta_info_t, icon_url) == (5 * sizeof(void *)),
+              meta_icon_offset);
+
 /* Sysmodule IDs (from ps5-payload-dev/sdk crt/rtld_sprx.c). */
 #define SYSMOD_IPMI           0x8000001d
 #define SYSMOD_USERSERVICE    0x80000011
@@ -58,12 +113,14 @@ typedef int (*ai_install_by_pkg_fn)(ai_meta_info_t *meta, ai_pkg_info_t *info,
                                     ai_playgo_info_t *playgo);
 typedef int (*ai_title_from_pkg_fn)(const char *path, char *title_id, int *is_app);
 typedef int (*ai_content_from_pkg_fn)(const char *path, char *content_id, int *is_app);
+typedef int (*ai_get_status_fn)(char *content_id_out, ai_install_status_t *status);
 
 static ai_init_fn             ai_initialize;
 static ai_install_pkg_fn      ai_install_pkg;
 static ai_install_by_pkg_fn   ai_install_by_package;
 static ai_title_from_pkg_fn   ai_title_from_pkg;
 static ai_content_from_pkg_fn ai_content_from_pkg;
+static ai_get_status_fn       ai_get_status;
 
 /* Resolve + initialize the AppInstUtil backend WITHOUT linking the sce libs
    (that makes the ELF unloadable by the elfldr) and WITHOUT raw
@@ -72,11 +129,18 @@ static ai_content_from_pkg_fn ai_content_from_pkg;
    symbols via the kernel dynlib helpers. Runs in a detached thread; the HTTP
    handler reports the stage and never blocks.
    stage: 0 idle, 1 resolve loader, 2 load modules, 3 resolve symbols,
-   4 initialize, 5 ready, negative = failure at that step. */
-static volatile int    g_stage;
-static int             g_err;
+   4 initialize, 5 ready, negative = failure at that step.
+   Stored as _Atomic so the worker's release-store and the request handlers'
+   acquire-loads pair properly — the function pointers they read after
+   stage==5 must not be reordered ahead of the stage check. */
+static _Atomic int     g_stage;
+static _Atomic int     g_err;
 static pthread_mutex_t g_mtx = PTHREAD_MUTEX_INITIALIZER;
 static char            g_probe_json[2048]; /* filled by the backend thread */
+static char            g_last_content_id[AI_CONTENTID_SIZE];
+static char            g_last_target_title_id[32];
+static char            g_last_method[32];
+static int             g_last_start_rc;
 
 static intptr_t
 dynsym(const char *module, const char *sym) {
@@ -112,6 +176,63 @@ local_ip(char *out, size_t n) {
     freeifaddrs(ifa);
 }
 
+static void
+copy_bounded(char *dst, size_t dst_sz, const char *src, size_t src_sz) {
+    size_t n;
+    if (!dst || !dst_sz) return;
+    dst[0] = '\0';
+    if (!src || !src_sz) return;
+    for (n = 0; n + 1 < dst_sz && n < src_sz && src[n]; n++)
+        dst[n] = src[n];
+    dst[n] = '\0';
+}
+
+/* Conservative whitelist for ids/filenames that we extract from a local path
+   and inject into URIs/log lines passed to AppInstUtil. Rejects CRLF, '/',
+   '\\', NUL, control chars, anything that could change URI semantics. */
+static int
+install_id_safe(const char *s) {
+    if (!s || !s[0]) return 0;
+    for (const char *p = s; *p; p++) {
+        if (!((*p >= 'A' && *p <= 'Z') ||
+              (*p >= 'a' && *p <= 'z') ||
+              (*p >= '0' && *p <= '9') ||
+              *p == '_' || *p == '-' || *p == '.'))
+            return 0;
+    }
+    return 1;
+}
+
+/* Exact match for PS4/PS5 title ids (9 chars: 4 letters + 5 digits). A bare
+   strncmp(...,9) would also match longer ids that share a 9-char prefix and
+   could collide PPSA12345 with PPSA12345EVIL. */
+static int
+title_id_eq9(const char *a, const char *b) {
+    if (!a || !b) return 0;
+    if (strnlen(a, 16) != 9 || strnlen(b, 16) != 9) return 0;
+    return strncmp(a, b, 9) == 0;
+}
+
+static void
+remember_install(const char *target_title_id, const char *method,
+                 const ai_pkg_info_t *pkg, const char *fallback_content_id,
+                 int rc) {
+    char cid[AI_CONTENTID_SIZE] = {0};
+
+    if (pkg)
+        copy_bounded(cid, sizeof(cid), pkg->content_id, sizeof(pkg->content_id));
+    if (!cid[0] && fallback_content_id)
+        copy_bounded(cid, sizeof(cid), fallback_content_id, strlen(fallback_content_id));
+
+    pthread_mutex_lock(&g_mtx);
+    snprintf(g_last_content_id, sizeof(g_last_content_id), "%s", cid);
+    snprintf(g_last_target_title_id, sizeof(g_last_target_title_id), "%s",
+             target_title_id ? target_title_id : "");
+    snprintf(g_last_method, sizeof(g_last_method), "%s", method ? method : "");
+    g_last_start_rc = rc;
+    pthread_mutex_unlock(&g_mtx);
+}
+
 /* Resolve (dlsym, never call) a list of candidate patch-install symbols and
    record which exist. Runs inside the backend thread, where the AppInstUtil
    module is already loaded — the same proven-safe context as the normal symbol
@@ -122,10 +243,12 @@ fill_probe(void) {
         "sceAppInstUtilInitialize",
         "sceAppInstUtilAppInstallPkg",
         "sceAppInstUtilAppInstallTitleDir",     /* takes an explicit title id */
+        "sceAppInstUtilAppInstallAll",          /* tile fallback on 13.xx */
         "sceAppInstUtilInstallByPackage",
         "sceAppInstUtilInstallByPackageEx",
         "sceAppInstUtilGetTitleIdFromPkg",
         "sceAppInstUtilGetContentIdFromPkg",
+        "sceAppInstUtilGetInstallStatus",
         "sceAppInstUtilAppExist",
         "sceAppInstUtilAppGetInstallStatus",
         "sceAppInstUtilAppInstallStatus",
@@ -209,6 +332,8 @@ backend_init_thread(void *arg) {
                                                          "sceAppInstUtilGetTitleIdFromPkg");
     ai_content_from_pkg   = (ai_content_from_pkg_fn)dynsym("libSceAppInstUtil.sprx",
                                                           "sceAppInstUtilGetContentIdFromPkg");
+    ai_get_status         = (ai_get_status_fn)dynsym("libSceAppInstUtil.sprx",
+                                                     "sceAppInstUtilGetInstallStatus");
 
     /* Read-only feasibility probe — module is loaded, safe context. */
     fill_probe();
@@ -241,6 +366,16 @@ backend_start(void) {
     pthread_mutex_unlock(&g_mtx);
 }
 
+/* Start the backend if needed and give it up to 15 s to come up (it loads a
+   system module and resolves symbols in its own thread), so an install
+   request right after startup doesn't fail just because it was early. */
+static void
+backend_wait(void) {
+    backend_start();
+    for (int i = 0; i < 150 && g_stage > 0 && g_stage != 5; i++)
+        usleep(100 * 1000);
+}
+
 static const char *
 stage_str(int s) {
     switch (s) {
@@ -295,7 +430,10 @@ patchdl_install_pkg_meta(const char *local_path, char *content_id, size_t cid_sz
                          char *title_id, size_t tid_sz, int *is_app,
                          char *msg, size_t msg_sz) {
     char        sdk_path[1024];
-    char        cid[64] = {0}, tid[48] = {0};
+    /* Padded output buffers — Sony's GetContentIdFromPkg / GetTitleIdFromPkg
+       take no length hint; firmware may NUL-pad more than the visible id. */
+    char        cid[AI_CONTENTID_OUT_SIZE] = {0};
+    char        tid[AI_TITLEID_OUT_SIZE]   = {0};
     int         app_c = 0, app_t = 0, ok = 0;
     struct stat st;
 
@@ -307,7 +445,7 @@ patchdl_install_pkg_meta(const char *local_path, char *content_id, size_t cid_sz
         snprintf(msg, msg_sz, "package not on disk");
         return -1;
     }
-    backend_start();
+    backend_wait();
     if (g_stage != 5) {
         snprintf(msg, msg_sz, "install backend not ready: %s", stage_str(g_stage));
         return -1;
@@ -319,25 +457,134 @@ patchdl_install_pkg_meta(const char *local_path, char *content_id, size_t cid_sz
 
     if (ai_content_from_pkg &&
         ai_content_from_pkg(sdk_path, cid, &app_c) == 0 && cid[0]) {
-        if (content_id && cid_sz) {
-            strncpy(content_id, cid, cid_sz - 1);
-            content_id[cid_sz - 1] = '\0';
-        }
+        copy_bounded(content_id, cid_sz, cid, sizeof(cid));
         if (is_app) *is_app = app_c;
         ok = 1;
     }
     if (ai_title_from_pkg &&
         ai_title_from_pkg(sdk_path, tid, &app_t) == 0 && tid[0]) {
-        if (title_id && tid_sz) {
-            strncpy(title_id, tid, tid_sz - 1);
-            title_id[tid_sz - 1] = '\0';
-        }
+        copy_bounded(title_id, tid_sz, tid, sizeof(tid));
         ok = 1;
     }
     snprintf(msg, msg_sz, ok ? "ok" : "could not read pkg metadata");
     return ok ? 0 : -1;
 }
 
+void
+patchdl_install_debug_state(char *out, size_t out_sz) {
+    char cid[AI_CONTENTID_SIZE];
+    char tid[32], method[32];
+    int  start_rc;
+    int  stage;
+
+    pthread_mutex_lock(&g_mtx);
+    memcpy(cid, g_last_content_id, sizeof(cid));
+    snprintf(tid,    sizeof(tid),    "%s", g_last_target_title_id);
+    snprintf(method, sizeof(method), "%s", g_last_method);
+    start_rc = g_last_start_rc;
+    stage    = g_stage;
+    pthread_mutex_unlock(&g_mtx);
+
+    snprintf(out, out_sz,
+             "{\"stage\":%d,\"cid_len\":%d,\"cid_hex\":\"%02x%02x%02x%02x\","
+             "\"content_id\":\"%s\",\"target_title_id\":\"%s\","
+             "\"method\":\"%s\",\"start_rc\":%d}",
+             stage,
+             (int)strnlen(cid, sizeof(cid)),
+             (unsigned char)cid[0], (unsigned char)cid[1],
+             (unsigned char)cid[2], (unsigned char)cid[3],
+             cid, tid, method, start_rc);
+}
+
+int
+patchdl_install_status_json(char *out, size_t out_sz) {
+    char cid[AI_CONTENTID_SIZE];
+    char tid[32];
+    char method[32];
+    int  start_rc;
+    /* ai_install_status_t carries a 2 KB safety pad; live on the heap so
+       a frequently-polled /api/installstatus doesn't keep committing pages
+       on every MHD worker's stack. */
+    ai_install_status_t *st = NULL;
+    char status[17], src_type[9];
+    int  rc;
+    int  progress = 0;
+    int  terminal = 0;
+
+    if (!out || !out_sz)
+        return -1;
+
+    backend_start();
+
+    pthread_mutex_lock(&g_mtx);
+    snprintf(cid, sizeof(cid), "%s", g_last_content_id);
+    snprintf(tid, sizeof(tid), "%s", g_last_target_title_id);
+    snprintf(method, sizeof(method), "%s", g_last_method);
+    start_rc = g_last_start_rc;
+    pthread_mutex_unlock(&g_mtx);
+
+    if (!cid[0]) {
+        snprintf(out, out_sz, "{\"active\":false}");
+        return -1;
+    }
+    if (g_stage != 5) {
+        snprintf(out, out_sz,
+                 "{\"active\":true,\"content_id\":\"%s\",\"target_title_id\":\"%s\","
+                 "\"method\":\"%s\",\"start_rc\":%d,\"status\":\"backend_not_ready\","
+                 "\"stage\":\"%s\"}",
+                 cid, tid, method, start_rc, stage_str(g_stage));
+        return -1;
+    }
+    if (!ai_get_status) {
+        snprintf(out, out_sz,
+                 "{\"active\":true,\"content_id\":\"%s\",\"target_title_id\":\"%s\","
+                 "\"method\":\"%s\",\"start_rc\":%d,\"status\":\"unavailable\","
+                 "\"message\":\"sceAppInstUtilGetInstallStatus not exported\"}",
+                 cid, tid, method, start_rc);
+        return -1;
+    }
+
+    st = calloc(1, sizeof(*st));
+    if (!st) {
+        snprintf(out, out_sz, "{\"error\":\"oom\"}");
+        return -1;
+    }
+
+    /* sceAppInstUtilGetInstallStatus(char *content_id_out, status_t *status):
+       first arg is an OUTPUT buffer that receives the current install's content_id.
+       Do NOT pass `cid` there — it would be overwritten. The visible id fits in
+       0x30 bytes but Sony's NUL-pad length is unknown; use a padded buffer. */
+    {
+        char ai_cid_out[AI_CONTENTID_OUT_SIZE] = {0};
+        rc = ai_get_status(ai_cid_out, st);
+        (void)ai_cid_out; /* returned content_id for future use */
+    }
+    copy_bounded(status, sizeof(status), st->status, sizeof(st->status));
+    copy_bounded(src_type, sizeof(src_type), st->src_type, sizeof(st->src_type));
+    if (st->total_size > 0)
+        progress = (int)((st->downloaded_size * 100) / st->total_size);
+    if (progress < 0) progress = 0;
+    if (progress > 100) progress = 100;
+    terminal = (!strcmp(status, "playable") ||
+                !strcmp(status, "error") ||
+                !strcmp(status, "none"));
+
+    snprintf(out, out_sz,
+             "{\"active\":true,\"terminal\":%s,\"content_id\":\"%s\","
+             "\"target_title_id\":\"%s\",\"method\":\"%s\",\"start_rc\":%d,"
+             "\"rc\":%d,\"status\":\"%s\",\"src_type\":\"%s\","
+             "\"progress\":%d,\"downloaded_size\":%llu,\"total_size\":%llu,"
+             "\"promote_progress\":%u,\"error_code\":%d}",
+             terminal ? "true" : "false", cid, tid, method, start_rc, rc,
+             status, src_type, progress,
+             (unsigned long long)st->downloaded_size,
+             (unsigned long long)st->total_size,
+             (unsigned)st->promote_progress,
+             (int)st->error_info.error_code);
+    free(st);
+    return rc;
+}
+
 int
 patchdl_install_local_pkg(const char *local_path, const char *expected_title_id,
                           const char *storage_title_id,
@@ -346,7 +593,7 @@ patchdl_install_local_pkg(const char *local_path, const char *expected_title_id,
     char        sdk_path[1024];
     char        pkg_tid[48] = {0};
     struct stat st;
-    int         rc;
+    int         rc = -1;
     int         pkg_tid_mismatch = 0;
 
     if (!local_path || !local_path[0]) {
@@ -358,7 +605,7 @@ patchdl_install_local_pkg(const char *local_path, const char *expected_title_id,
         return -1;
     }
 
-    backend_start();
+    backend_wait();
     if (g_stage != 5) {
         snprintf(msg, msg_sz, "install backend not ready: %s", stage_str(g_stage));
         return -1;
@@ -380,15 +627,20 @@ patchdl_install_local_pkg(const char *local_path, const char *expected_title_id,
        such packages to the raw AppInstallPkg path. */
     if (storage_title_id && storage_title_id[0] &&
         expected_title_id && expected_title_id[0] &&
-        strncmp(storage_title_id, expected_title_id, 9) != 0) {
+        !title_id_eq9(storage_title_id, expected_title_id)) {
         pkg_tid_mismatch = 1;
         strncpy(pkg_tid, storage_title_id, sizeof(pkg_tid) - 1);
+        pkg_tid[sizeof(pkg_tid) - 1] = '\0';
     }
     if (ai_title_from_pkg && expected_title_id && expected_title_id[0]) {
+        /* Sony's GetTitleIdFromPkg writes into the output buffer with no length
+           hint — pad generously and copy the safe portion into pkg_tid. */
+        char tid_out[AI_TITLEID_OUT_SIZE] = {0};
         int  is_app = 0;
-        if (ai_title_from_pkg(sdk_path, pkg_tid, &is_app) == 0 && pkg_tid[0] &&
-            strncmp(pkg_tid, expected_title_id, 9) != 0) {
-            pkg_tid_mismatch = 1;
+        if (ai_title_from_pkg(sdk_path, tid_out, &is_app) == 0 && tid_out[0]) {
+            if (!title_id_eq9(tid_out, expected_title_id))
+                pkg_tid_mismatch = 1;
+            copy_bounded(pkg_tid, sizeof(pkg_tid), tid_out, sizeof(tid_out));
         }
     }
     if (pkg_tid_mismatch && (!target_content_id || !target_content_id[0])) {
@@ -397,21 +649,29 @@ patchdl_install_local_pkg(const char *local_path, const char *expected_title_id,
                  pkg_tid, expected_title_id);
         return -1;
     }
-
-    /* Preferred path: InstallByPackage accepts target metadata. Use it first,
-       and use it exclusively when the downloaded bytes report a master/storage
-       title id that differs from the target regional title id. */
+    /* Preferred path: etaHEN's DPI uses InstallByPackage with the installed
+       game's content_id in MetaInfo so AppInstUtil binds the install to the
+       right title slot. For shared-master cross-region packages the pkg bytes
+       carry a different title id than the installed game; passing content_id
+       is what etaHEN does to route the install correctly. */
     {
-        char             file_uri[1100];
-        char             http_loop_uri[1200] = {0};
-        char             http_lan_uri[1200] = {0};
-        const char      *uris[4];
-        ai_meta_info_t   meta   = {0};
-        ai_pkg_info_t    pkg    = {0};
-        ai_playgo_info_t playgo = {0};
-        int              rc2    = -1;
-        const char      *title_dir;
-        const char      *file_base;
+        char              file_uri[1100];
+        char              http_loop_uri[1200] = {0};
+        char              http_lan_uri[1200] = {0};
+        const char       *uris[4];
+        ai_meta_info_t    meta    = {0};
+        ai_pkg_info_t     pkg     = {0};
+        /* playgo is 0x2700 bytes — too big for the MHD worker stack alongside
+           uris, meta, pkg, resp buffers, and Sony's own frame use. */
+        ai_playgo_info_t *playgo  = calloc(1, sizeof(*playgo));
+        int               rc2     = -1;
+        const char       *title_dir;
+        const char       *file_base;
+
+        if (!playgo) {
+            snprintf(msg, msg_sz, "out of memory");
+            return -1;
+        }
 
         snprintf(file_uri, sizeof(file_uri), "file://%s", sdk_path);
         title_dir = strstr(local_path, "/data/patchdl/");
@@ -423,69 +683,147 @@ patchdl_install_local_pkg(const char *local_path, const char *expected_title_id,
             if (tlen > 0 && tlen < sizeof(title_id)) {
                 char ip[INET_ADDRSTRLEN] = {0};
                 memcpy(title_id, t, tlen);
-                snprintf(http_loop_uri, sizeof(http_loop_uri),
-                         "http://127.0.0.1:%d/api/pkg/%s/%s",
-                         PATCHDL_HTTP_PORT, title_id, file_base + 1);
-                local_ip(ip, sizeof(ip));
-                if (ip[0])
-                    snprintf(http_lan_uri, sizeof(http_lan_uri),
-                             "http://%s:%d/api/pkg/%s/%s",
-                             ip, PATCHDL_HTTP_PORT, title_id, file_base + 1);
+                /* CRLF/path-injection guard: anything we splice into the loop /
+                   LAN URI lands inside Sony's HTTP request line. Reject ids
+                   or filenames carrying delimiters or control chars. */
+                if (install_id_safe(title_id) && install_id_safe(file_base + 1)) {
+                    snprintf(http_loop_uri, sizeof(http_loop_uri),
+                             "http://127.0.0.1:%d/api/pkg/%s/%s",
+                             PATCHDL_HTTP_PORT, title_id, file_base + 1);
+                    local_ip(ip, sizeof(ip));
+                    if (ip[0])
+                        snprintf(http_lan_uri, sizeof(http_lan_uri),
+                                 "http://%s:%d/api/pkg/%s/%s",
+                                 ip, PATCHDL_HTTP_PORT, title_id, file_base + 1);
+                }
             }
         }
-        uris[0]                 = sdk_path;      /* /user/data/... — the allowlisted path */
-        uris[1]                 = file_uri;       /* file:///user/data/... */
-        uris[2]                 = http_loop_uri[0] ? http_loop_uri : NULL;
-        uris[3]                 = http_lan_uri[0] ? http_lan_uri : NULL;
+        /* Stream install first: Sony's installer pulls the package from our
+           own /api/pkg over HTTP (ranges), the route that writes the content.
+           The bare path forms come last. */
+        uris[0]                 = http_loop_uri[0] ? http_loop_uri : NULL;
+        uris[1]                 = http_lan_uri[0] ? http_lan_uri : NULL;
+        uris[2]                 = sdk_path;      /* /user/data/... */
+        uris[3]                 = file_uri;       /* file:///user/data/... */
         meta.ex_uri             = "";
         meta.playgo_scenario_id = "";
-        meta.content_id         = target_content_id ? target_content_id : "";
+        /* Empty: the installer takes the id from the package itself. */
+        meta.content_id         = "";
         meta.content_name       = "PatchDL";
         meta.icon_url           = "";
 
         {
             char        tries[260] = {0};
-            const char *labels[4]  = { "userdata", "file", "loop", "lan" };
+            const char *labels[4]  = { "loop", "lan", "userdata", "file" };
             for (int i = 0; i < 4; i++) {
                 if (!uris[i]) continue;
                 memset(&pkg, 0, sizeof(pkg));
-                memset(&playgo, 0, sizeof(playgo));
+                memset(playgo, 0, sizeof(*playgo));
                 meta.uri = uris[i];
-                rc2 = ai_install_by_package(&meta, &pkg, &playgo);
+                rc2 = ai_install_by_package(&meta, &pkg, playgo);
                 {
                     size_t l = strlen(tries);
                     snprintf(tries + l, sizeof(tries) - l, "%s%s=0x%08x",
                              l ? "," : "", labels[i], (unsigned)rc2);
                 }
                 if (rc2 == 0) {
-                    snprintf(msg, msg_sz, "install started (InstallByPackage%s)",
-                             pkg_tid_mismatch ? ", shared master bytes" : "");
+                    remember_install(expected_title_id, "InstallByPackage",
+                                     &pkg, target_content_id, rc2);
+                    snprintf(msg, msg_sz, "install started (InstallByPackage, content %.47s)",
+                             pkg.content_id[0] ? pkg.content_id :
+                             (target_content_id ? target_content_id : ""));
+                    free(playgo);
                     return 0;
                 }
             }
             rc = rc2;
-            if (pkg_tid_mismatch) {
-                snprintf(msg, msg_sz,
-                         "install rejected (pkg %.12s -> %.12s; tries: %s)",
-                         pkg_tid, expected_title_id ? expected_title_id : "", tries);
-                return rc ? rc : -1;
-            }
         }
+        free(playgo);
     }
 
-    /* Last resort for normal same-title packages only. This path has no target
-       metadata parameter, so it is intentionally skipped for shared-master
-       region bytes. */
-    {
-        ai_pkg_info_t pkg = {0};
-        int rc2 = ai_install_pkg(sdk_path, &pkg);
-        if (rc2 == 0) {
-            snprintf(msg, msg_sz, "install started (AppInstallPkg)");
-            return 0;
-        }
-        snprintf(msg, msg_sz,
-                 "install rejected (InstallByPackage=0x%08x, AppInstallPkg=0x%08x)",
-                 (unsigned)rc, (unsigned)rc2);
-        return rc2 ? rc2 : (rc ? rc : -1);
+    /* No AppInstallPkg fallback: it returns 0 and writes only the app
+       metadata (version, tile) without installing any content, which shows
+       up as "updated" while the game still runs the old version. */
+    snprintf(msg, msg_sz, "install rejected (InstallByPackage=0x%08x)", (unsigned)rc);
+    return rc ? rc : -1;
+}
+
+int
+patchdl_install_by_uri(const char *uri, const char *target_title_id,
+                       const char *target_content_id,
+                       char *msg, size_t msg_sz) {
+    ai_meta_info_t    meta   = {0};
+    ai_pkg_info_t     pkg    = {0};
+    ai_playgo_info_t *playgo;
+    int rc;
+
+    if (!uri || !uri[0]) {
+        snprintf(msg, msg_sz, "no uri");
+        return -1;
     }
+    backend_wait();
+    if (g_stage != 5) {
+        snprintf(msg, msg_sz, "install backend not ready: %s", stage_str(g_stage));
+        return -1;
+    }
+    playgo = calloc(1, sizeof(*playgo));
+    if (!playgo) { snprintf(msg, msg_sz, "out of memory"); return -1; }
+
+    meta.uri                = uri;
+    meta.ex_uri             = "";
+    meta.playgo_scenario_id = "";
+    meta.content_id         = target_content_id ? target_content_id : "";
+    meta.content_name       = "PatchDL";
+    meta.icon_url           = "";
+
+    rc = ai_install_by_package(&meta, &pkg, playgo);
+    remember_install(target_title_id, "InstallByURI", &pkg, target_content_id, rc);
+    free(playgo);
+
+    if (rc == 0) {
+        snprintf(msg, msg_sz, "install started (InstallByPackage/uri, content %.47s)",
+                 pkg.content_id[0] ? pkg.content_id :
+                 (target_content_id ? target_content_id : ""));
+    } else {
+        snprintf(msg, msg_sz, "install rejected rc=0x%08x", (unsigned)rc);
+    }
+    return rc;
+}
+
+/* Direct AppInstallPkg call for a local path — bypasses MetaInfo, lets
+   AppInstUtil read the PKG's own embedded metadata to determine the target. */
+int
+patchdl_install_app_pkg(const char *local_path,
+                        const char *expected_title_id,
+                        const char *target_content_id,
+                        char *msg, size_t msg_sz) {
+    char          sdk_path[1024];
+    ai_pkg_info_t pkg = {0};
+    struct stat   st;
+    int           rc;
+
+    if (!local_path || !local_path[0]) { snprintf(msg, msg_sz, "no path"); return -1; }
+    if (stat(local_path, &st) != 0)    { snprintf(msg, msg_sz, "package not downloaded"); return -1; }
+
+    backend_wait();
+    if (g_stage != 5) {
+        snprintf(msg, msg_sz, "install backend not ready: %s", stage_str(g_stage));
+        return -1;
+    }
+
+    if (!strncmp(local_path, "/data/", 6))
+        snprintf(sdk_path, sizeof sdk_path, "/user%s", local_path);
+    else
+        snprintf(sdk_path, sizeof sdk_path, "%s", local_path);
+
+    rc = ai_install_pkg(sdk_path, &pkg);
+    remember_install(expected_title_id, "AppInstallPkg/direct", &pkg, target_content_id, rc);
+
+    if (rc == 0)
+        snprintf(msg, msg_sz, "install started (AppInstallPkg, content %.47s)",
+                 pkg.content_id[0] ? pkg.content_id :
+                 (target_content_id ? target_content_id : ""));
+    else
+        snprintf(msg, msg_sz, "install rejected rc=0x%08x", (unsigned)rc);
+    return rc;
 }

src/patchdl_install.h

@@ -1,3 +1,12 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later
+ * Copyright (C) 2026 Knutwurst
+ *
+ * PatchDL is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free
+ * Software Foundation, either version 3 of the License, or (at your option)
+ * any later version. See the LICENSE file in the project root for details.
+ */
+
 #pragma once
 
 #include <stddef.h>
@@ -14,9 +23,10 @@
  */
 /* `expected_title_id` is the title id of the installed game the patch is for.
    `storage_title_id` is the title id embedded in the delta_url storage path.
-   `target_content_id` is the installed game's content id from app.db; when
-   present it is passed to InstallByPackage so Sony's installer has the target
-   metadata even for region-shared/master-storage patch bytes. */
+   `target_content_id` is the installed game's content id from app.db; it is
+   retained for diagnostics and status fallback. Normal same-title installs
+   deliberately pass an empty MetaInfo.content_id, matching etaHEN's native DPI
+   path and letting AppInstUtil bind the package to its signed metadata. */
 int patchdl_install_local_pkg(const char *local_path,
                               const char *expected_title_id,
                               const char *storage_title_id,
@@ -37,3 +47,29 @@ int patchdl_install_api_probe(char *out, size_t out_sz);
 int patchdl_install_pkg_meta(const char *local_path, char *content_id, size_t cid_sz,
                              char *title_id, size_t tid_sz, int *is_app,
                              char *msg, size_t msg_sz);
+
+/* Read-only: report the last AppInstUtil install task PatchDL started, using
+   sceAppInstUtilGetInstallStatus when present. No install, no mutation. */
+int patchdl_install_status_json(char *out, size_t out_sz);
+
+/* Raw dump of g_last_* tracking state (no AppInstUtil call). For diagnosis. */
+void patchdl_install_debug_state(char *out, size_t out_sz);
+
+/* Install a package from a remote URI (http:// or file://) directly, without
+ * requiring a local copy. Used for shared-master delta packages where the
+ * version.xml targets a different title id than the CDN storage path.
+ * `target_content_id` is the installed title's content_id (passed as
+ * MetaInfo.content_id so AppInstUtil binds the install to the right title).
+ */
+int patchdl_install_by_uri(const char *uri,
+                            const char *target_title_id,
+                            const char *target_content_id,
+                            char *msg, size_t msg_sz);
+
+/* Directly call sceAppInstUtilAppInstallPkg for a local file. No MetaInfo —
+ * AppInstUtil reads the PKG's embedded content_id/title_id for routing.
+ * Use when InstallByPackage is unavailable (privilege). */
+int patchdl_install_app_pkg(const char *local_path,
+                             const char *expected_title_id,
+                             const char *target_content_id,
+                             char *msg, size_t msg_sz);

src/patchdl_net.c

@@ -1,7 +1,17 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later
+ * Copyright (C) 2026 Knutwurst
+ *
+ * PatchDL is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free
+ * Software Foundation, either version 3 of the License, or (at your option)
+ * any later version. See the LICENSE file in the project root for details.
+ */
+
 #include "patchdl_net.h"
 
 #include <arpa/inet.h>
 #include <errno.h>
+#include <fcntl.h>
 #include <netinet/in.h>
 #include <pthread.h>
 #include <stdio.h>
@@ -9,6 +19,7 @@
 #include <string.h>
 #include <strings.h>
 #include <sys/socket.h>
+#include <sys/stat.h>
 #include <sys/time.h>
 #include <unistd.h>
 
@@ -22,32 +33,75 @@
 #define DNS_PORT       53
 #define DNS_TIMEOUT_MS 3000
 
+/* Manifest sanity caps — reject anything bigger than a real PS5 patch. The
+   largest title we've seen tops out around 70 GB / 18 pieces. */
+#define PATCHDL_MAX_PIECES         4096
+#define PATCHDL_MAX_PIECE_BYTES    (8ULL  * 1024 * 1024 * 1024)   /* 8 GiB  */
+#define PATCHDL_MAX_TOTAL_BYTES    (200ULL * 1024 * 1024 * 1024)  /* 200 GiB */
+
+/* In-RAM buffer caps for full HTTP body fetches. version.xml is a few KB,
+   manifest JSON is a few MB at most — fail-closed beyond that. The
+   manifest cap is sized for ~4096 pieces × ~3 KB JSON each with plenty of
+   headroom; real PS5 manifests are 1-2 MB. */
+#define PATCHDL_BUF_MAX_VERXML     (4   * 1024 * 1024)
+#define PATCHDL_BUF_MAX_MANIFEST   (16  * 1024 * 1024)
+
+#ifdef PATCHDL_HAVE_CURL
+/* Replacement for fopen("wb"/"r+b") that refuses to follow a symlink at the
+   destination (would let a malicious symlink redirect the download) and pins
+   the new file's mode to 0600. Returns NULL on any open error. */
+static FILE *
+fopen_safe(const char *path, int rw_existing) {
+    int flags = O_CLOEXEC | O_NOFOLLOW;
+    int fd;
+    flags |= rw_existing ? O_RDWR : (O_WRONLY | O_CREAT | O_TRUNC);
+    fd = open(path, flags, 0600);
+    if (fd < 0) return NULL;
+    return fdopen(fd, rw_existing ? "r+b" : "wb");
+}
+#endif
+
 #ifdef PATCHDL_HAVE_CURL
 
 static const char *ALLOWED_HOSTS[] = {
     "sgst.prod.dl.playstation.net",
     "gst.prod.dl.playstation.net",
     "gs2.ww.prod.dl.playstation.net",
-    "prosperopatches.com",
+    "gs-sec.ww.np.dl.playstation.net",   /* PS4 update lists */
     NULL,
 };
 
+/* PS4 package manifests are published on gs2 over plain http only (https
+   there is a CloudFront edge without Sony's certificate). The console's own
+   installer checks the package signature, so a forged manifest can't get an
+   unsigned package installed. Everything else stays https-only. */
+#define PLAIN_HTTP_HOST "gs2.ww.prod.dl.playstation.net"
+
 static int
 host_allowed(const char *host) {
     size_t hlen = strlen(host);
+    /* DNS is case-insensitive; an upstream redirect to "SGST.prod..." would
+       otherwise drop out of the allowlist. */
     for (int i = 0; ALLOWED_HOSTS[i]; i++) {
-        if (!strcmp(host, ALLOWED_HOSTS[i]))
+        if (!strcasecmp(host, ALLOWED_HOSTS[i]))
             return 1;
         size_t alen = strlen(ALLOWED_HOSTS[i]);
         if (hlen > alen + 1 &&
             host[hlen - alen - 1] == '.' &&
-            !strcmp(host + hlen - alen, ALLOWED_HOSTS[i]))
+            !strcasecmp(host + hlen - alen, ALLOWED_HOSTS[i]))
             return 1;
     }
     return 0;
 }
 
 /* Extract hostname from https://host/path or http://host/path */
+/* Manifest piece hashes: PS5 manifests carry SHA-256 (64 hex digits), PS4
+   manifests SHA-1 (40). */
+static const EVP_MD *
+digest_for(const char *hex) {
+    return (hex && strlen(hex) == 40) ? EVP_sha1() : EVP_sha256();
+}
+
 static int
 url_host(const char *url, char *out, size_t out_sz) {
     const char *p = strstr(url, "://");
@@ -145,6 +199,10 @@ dns_resolve(const char *host, char *ip_out, size_t ip_sz) {
     while (pos < (size_t)n) {
         if (!resp[pos]) { pos++; break; }
         if ((resp[pos] & 0xC0) == 0xC0) { pos += 2; break; }
+        /* Bounds-check the label length BEFORE the increment — a malformed
+           response with a 0xFF label byte near the end would otherwise walk
+           past `n`. */
+        if (pos + 1 + (size_t)resp[pos] >= (size_t)n) { g_dns_step = 5; return -1; }
         pos += 1 + resp[pos];
     }
     if (pos + 4 > (size_t)n) { g_dns_step = 5; return -1; }
@@ -156,8 +214,10 @@ dns_resolve(const char *host, char *ip_out, size_t ip_sz) {
         if ((resp[pos] & 0xC0) == 0xC0) {
             pos += 2;
         } else {
-            while (pos < (size_t)n && resp[pos])
+            while (pos < (size_t)n && resp[pos]) {
+                if (pos + 1 + (size_t)resp[pos] >= (size_t)n) break;
                 pos += 1 + resp[pos];
+            }
             pos++;
         }
         if (pos + 10 > (size_t)n) break;
@@ -222,7 +282,12 @@ static size_t
 write_cb(void *ptr, size_t size, size_t nmemb, void *userdata) {
     patchdl_buf_t *b     = userdata;
     size_t         total = size * nmemb;
-    char          *newp  = realloc(b->data, b->size + total + 1);
+    char          *newp;
+    /* Overflow guard before the cap check (b->size+total may wrap on 32-bit). */
+    if (total > (size_t)-1 - b->size - 1) return 0;
+    /* Cap accumulation so a hostile CDN can't drive unbounded RAM growth. */
+    if (b->max && b->size + total > b->max) return 0;
+    newp = realloc(b->data, b->size + total + 1);
     if (!newp) return 0;
     b->data = newp;
     memcpy(b->data + b->size, ptr, total);
@@ -240,8 +305,11 @@ patchdl_http_get(const char *url, patchdl_buf_t *out) {
     struct curl_slist *resolve_list = NULL;
     struct curl_blob  ca_blob;
 
+    int plain = !strncmp(url, "http://", 7);
+
     if (url_host(url, host, sizeof(host))) return -1;
     if (!host_allowed(host)) return -1;
+    if (plain && strcasecmp(host, PLAIN_HTTP_HOST)) return -1;
     if (dns_lookup(host, ip, sizeof(ip))) return -1;
 
     snprintf(resolve_str, sizeof(resolve_str), "%s:443:%s", host, ip);
@@ -252,7 +320,11 @@ patchdl_http_get(const char *url, patchdl_buf_t *out) {
     snprintf(resolve_80, sizeof(resolve_80), "%s:80:%s", host, ip);
     resolve_list = curl_slist_append(resolve_list, resolve_80);
 
-    memset(out, 0, sizeof(*out));
+    {
+        size_t caller_max = out->max;
+        memset(out, 0, sizeof(*out));
+        out->max = caller_max;
+    }
 
     curl = curl_easy_init();
     if (!curl) { curl_slist_free_all(resolve_list); return -1; }
@@ -277,6 +349,13 @@ patchdl_http_get(const char *url, patchdl_buf_t *out) {
     curl_easy_setopt(curl, CURLOPT_TIMEOUT,         15L);
     curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION,  1L);
     curl_easy_setopt(curl, CURLOPT_MAXREDIRS,       3L);
+    /* Redirects must stay on HTTPS — host_allowed gates the initial URL, but
+       once libcurl follows a 302 we want the protocol pinned too. The _STR
+       variants replaced the bitfield options in libcurl 7.85. Plain http only
+       for the PS4 manifest host (see PLAIN_HTTP_HOST). */
+    curl_easy_setopt(curl, CURLOPT_PROTOCOLS_STR,       plain ? "http" : "https");
+    curl_easy_setopt(curl, CURLOPT_REDIR_PROTOCOLS_STR, "https");
+    curl_easy_setopt(curl, CURLOPT_NOSIGNAL,        1L);
     curl_easy_setopt(curl, CURLOPT_USERAGENT,       "patchdl/1.0");
 
     res = curl_easy_perform(curl);
@@ -292,6 +371,90 @@ patchdl_http_get(const char *url, patchdl_buf_t *out) {
     return 0;
 }
 
+/* ---------- external-host HTTP (no Sony CA, no allowlist) -------------- */
+
+static int
+http_external(const char *url, const char *method,
+              const char *content_type, const char *body,
+              patchdl_buf_t *out) {
+#ifndef PATCHDL_HAVE_CURL
+    (void)url; (void)method; (void)content_type; (void)body; (void)out;
+    return -1;
+#else
+    CURL             *curl;
+    CURLcode          res;
+    char              host[256], ip[INET_ADDRSTRLEN];
+    char              resolve_str[512];
+    struct curl_slist *resolve_list = NULL;
+    struct curl_slist *headers      = NULL;
+
+    if (url_host(url, host, sizeof(host))) return -1;
+    if (dns_lookup(host, ip, sizeof(ip))) return -1;
+
+    snprintf(resolve_str, sizeof(resolve_str), "%s:443:%s", host, ip);
+    resolve_list = curl_slist_append(NULL, resolve_str);
+
+    {
+        size_t caller_max = out->max;
+        memset(out, 0, sizeof(*out));
+        out->max = caller_max;
+    }
+
+    curl = curl_easy_init();
+    if (!curl) { curl_slist_free_all(resolve_list); return -1; }
+
+    curl_easy_setopt(curl, CURLOPT_URL,             url);
+    curl_easy_setopt(curl, CURLOPT_RESOLVE,         resolve_list);
+    curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION,   write_cb);
+    curl_easy_setopt(curl, CURLOPT_WRITEDATA,       out);
+    curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER,  0L);
+    curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST,  0L);
+    curl_easy_setopt(curl, CURLOPT_TIMEOUT,         10L);
+    curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION,  1L);
+    curl_easy_setopt(curl, CURLOPT_MAXREDIRS,       3L);
+    curl_easy_setopt(curl, CURLOPT_PROTOCOLS_STR,       "https");
+    curl_easy_setopt(curl, CURLOPT_REDIR_PROTOCOLS_STR, "https");
+    curl_easy_setopt(curl, CURLOPT_NOSIGNAL,        1L);
+    curl_easy_setopt(curl, CURLOPT_USERAGENT,
+                     "Mozilla/5.0 (PlayStation; PatchDL)");
+
+    if (body) {
+        if (content_type) {
+            char ct[256];
+            snprintf(ct, sizeof(ct), "Content-Type: %s", content_type);
+            headers = curl_slist_append(headers, ct);
+        }
+        headers = curl_slist_append(headers, "Accept: application/json");
+        curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
+        curl_easy_setopt(curl, CURLOPT_POSTFIELDS, body);
+    }
+
+    res = curl_easy_perform(curl);
+    curl_easy_cleanup(curl);
+    curl_slist_free_all(resolve_list);
+    curl_slist_free_all(headers);
+
+    if (res != CURLE_OK) {
+        free(out->data);
+        out->data = NULL;
+        out->size = 0;
+        return -1;
+    }
+    return 0;
+#endif
+}
+
+int
+patchdl_http_get_external(const char *url, patchdl_buf_t *out) {
+    return http_external(url, "GET", NULL, NULL, out);
+}
+
+int
+patchdl_http_post_external(const char *url, const char *content_type,
+                           const char *body, patchdl_buf_t *out) {
+    return http_external(url, "POST", content_type, body, out);
+}
+
 /* Write sink: tees the body to the file and, when verifying, into a running
    SHA-256. curl always calls with size==1, so nmemb is the byte count. */
 typedef struct {
@@ -372,7 +535,7 @@ http_download_to_file_progress(const char *url, FILE *fp, long long *bytes_out,
     if (verify) {
         sink.md = EVP_MD_CTX_new();
         if (sink.md)
-            EVP_DigestInit_ex(sink.md, EVP_sha256(), NULL);
+            EVP_DigestInit_ex(sink.md, digest_for(expected_sha256_hex), NULL);
     }
 
     snprintf(rs443, sizeof(rs443), "%s:443:%s", host, ip);
@@ -401,6 +564,13 @@ http_download_to_file_progress(const char *url, FILE *fp, long long *bytes_out,
     curl_easy_setopt(curl, CURLOPT_SSL_CIPHER_LIST, "DEFAULT@SECLEVEL=0");
     curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION,  1L);
     curl_easy_setopt(curl, CURLOPT_MAXREDIRS,       5L);
+    /* HTTPS pin removed on the streaming download path: the Sony CDN sometimes
+       302s a piece URL to a signed http:// edge inside its own infrastructure,
+       and refusing those redirects was breaking real-world downloads.
+       host_allowed + TLS-against-pinned-root on every leg already gate the
+       hosts we'll talk to. NOSIGNAL stays — it protects the worker from a
+       SIGPIPE on connection RST. */
+    curl_easy_setopt(curl, CURLOPT_NOSIGNAL,        1L);
     curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT,  20L);
     /* No total timeout (patches can be large); abort only on a long stall. */
     curl_easy_setopt(curl, CURLOPT_LOW_SPEED_LIMIT, 1024L);
@@ -437,8 +607,11 @@ http_download_to_file_progress(const char *url, FILE *fp, long long *bytes_out,
         unsigned char dig[EVP_MAX_MD_SIZE];
         unsigned int  dlen = 0;
         char          hex[2 * EVP_MAX_MD_SIZE + 1];
-        EVP_DigestFinal_ex(sink.md, dig, &dlen);
+        int           ok = EVP_DigestFinal_ex(sink.md, dig, &dlen);
         EVP_MD_CTX_free(sink.md);
+        /* Fail-closed on a digest API failure — otherwise hex would be empty
+           and we'd silently report -2 with no diagnostic. */
+        if (ok != 1 || dlen == 0) return -2;
         hex_encode(dig, dlen, hex, sizeof(hex));
         if (strcasecmp(hex, expected_sha256_hex) != 0)
             return -2;          /* integrity mismatch */
@@ -452,7 +625,7 @@ int
 patchdl_http_download_progress(const char *url, const char *dest_path,
                                long long *bytes_out,
                                patchdl_download_progress_cb cb, void *ctx) {
-    FILE *fp = fopen(dest_path, "wb");
+    FILE *fp = fopen_safe(dest_path, 0);
     progress_state_t progress = { cb, ctx, 0, 0 };
     int rc;
 
@@ -473,8 +646,24 @@ patchdl_http_download(const char *url, const char *dest_path,
     return patchdl_http_download_progress(url, dest_path, bytes_out, NULL, NULL);
 }
 
+/* Substring scan bounded to [p, limit). NULL limit means search to NUL.
+   Returns NULL if needle is not found before limit. */
+static const char *
+strstr_bounded(const char *p, const char *needle, const char *limit) {
+    const char *hit = strstr(p, needle);
+    if (!hit) return NULL;
+    if (limit && hit >= limit) return NULL;
+    return hit;
+}
+
+/* Read "key": "value" starting from p. Search and read are bounded by `limit`
+   (pass NULL to search to end of buffer). Decodes \\ \" \/ \n \r \t \b \f; any
+   other \X is copied without the backslash. \uXXXX is left as the raw 6 bytes
+   (we don't need Unicode for manifest fields). limit==NULL keeps legacy
+   end-of-string scope for callers that don't need the cap. */
 static int
-json_string_after(const char *p, const char *key, char *out, size_t out_sz) {
+json_string_after(const char *p, const char *key, char *out, size_t out_sz,
+                  const char *limit) {
     char needle[48];
     const char *q;
     size_t n = 0;
@@ -482,35 +671,59 @@ json_string_after(const char *p, const char *key, char *out, size_t out_sz) {
     if (!p || !out || out_sz == 0) return -1;
     out[0] = '\0';
     snprintf(needle, sizeof(needle), "\"%s\"", key);
-    q = strstr(p, needle);
+    q = strstr_bounded(p, needle, limit);
     if (!q) return -1;
     q += strlen(needle);
-    while (*q == ' ' || *q == '\t' || *q == '\r' || *q == '\n') q++;
+    while ((!limit || q < limit) &&
+           (*q == ' ' || *q == '\t' || *q == '\r' || *q == '\n')) q++;
+    if (limit && q >= limit) return -1;
     if (*q++ != ':') return -1;
-    while (*q == ' ' || *q == '\t' || *q == '\r' || *q == '\n') q++;
+    while ((!limit || q < limit) &&
+           (*q == ' ' || *q == '\t' || *q == '\r' || *q == '\n')) q++;
+    if (limit && q >= limit) return -1;
     if (*q++ != '"') return -1;
 
-    while (*q && *q != '"' && n + 1 < out_sz) {
-        if (*q == '\\' && q[1]) q++;
-        out[n++] = *q++;
+    while ((!limit || q < limit) && *q && *q != '"' && n + 1 < out_sz) {
+        if (*q == '\\' && q[1] && (!limit || q + 1 < limit)) {
+            q++;
+            switch (*q) {
+            case '"':  out[n++] = '"';  break;
+            case '\\': out[n++] = '\\'; break;
+            case '/':  out[n++] = '/';  break;
+            case 'n':  out[n++] = '\n'; break;
+            case 'r':  out[n++] = '\r'; break;
+            case 't':  out[n++] = '\t'; break;
+            case 'b':  out[n++] = '\b'; break;
+            case 'f':  out[n++] = '\f'; break;
+            default:   out[n++] = *q;   break; /* unknown escape: keep payload */
+            }
+            q++;
+        } else {
+            out[n++] = *q++;
+        }
     }
     out[n] = '\0';
     return n ? 0 : -1;
 }
 
 static int
-json_u64_after(const char *p, const char *key, unsigned long long *out) {
+json_u64_after(const char *p, const char *key, unsigned long long *out,
+               const char *limit) {
     char needle[48];
     const char *q;
 
     if (!p || !out) return -1;
     snprintf(needle, sizeof(needle), "\"%s\"", key);
-    q = strstr(p, needle);
+    q = strstr_bounded(p, needle, limit);
     if (!q) return -1;
     q += strlen(needle);
-    while (*q == ' ' || *q == '\t' || *q == '\r' || *q == '\n') q++;
+    while ((!limit || q < limit) &&
+           (*q == ' ' || *q == '\t' || *q == '\r' || *q == '\n')) q++;
+    if (limit && q >= limit) return -1;
     if (*q++ != ':') return -1;
-    while (*q == ' ' || *q == '\t' || *q == '\r' || *q == '\n') q++;
+    while ((!limit || q < limit) &&
+           (*q == ' ' || *q == '\t' || *q == '\r' || *q == '\n')) q++;
+    if (limit && q >= limit) return -1;
     if (*q < '0' || *q > '9') return -1;
     *out = strtoull(q, NULL, 10);
     return 0;
@@ -530,6 +743,8 @@ patchdl_http_download_manifest_progress(const char *manifest_url,
     int count = 0, started, rc = -1;
 
     if (bytes_out) *bytes_out = 0;
+    memset(&manifest, 0, sizeof(manifest));
+    manifest.max = PATCHDL_BUF_MAX_MANIFEST;
     if (patchdl_http_get(manifest_url, &manifest))
         return -1;
     if (!manifest.data || !manifest.size) {
@@ -545,17 +760,17 @@ patchdl_http_download_manifest_progress(const char *manifest_url,
     /* Bound the scan to the pieces array; otherwise a later "url" key in the
        manifest (e.g. playgoChunkCrcUrl) could be appended as a bogus piece. */
     pieces_end = strchr(pieces, ']');
-    json_u64_after(manifest.data, "originalFileSize", &manifest_total);
+    json_u64_after(manifest.data, "originalFileSize", &manifest_total, NULL);
 
     /* Resume: reopen the existing partial and keep its bytes; else start clean.
        Fully-downloaded pieces are skipped; the one piece that was only partially
        written continues mid-piece via an HTTP byte range (with a fall back to
        re-fetching it whole if the CDN ignores the range). */
     if (resume) {
-        fp = fopen(dest_path, "r+b");
+        fp = fopen_safe(dest_path, 1);
         if (fp) { fseek(fp, 0, SEEK_END); have = ftell(fp); if (have < 0) have = 0; }
     }
-    if (!fp) { fp = fopen(dest_path, "wb"); have = 0; }
+    if (!fp) { fp = fopen_safe(dest_path, 0); have = 0; }
     if (!fp) { free(manifest.data); return -1; }
     started = (have <= 0);
 
@@ -569,11 +784,13 @@ patchdl_http_download_manifest_progress(const char *manifest_url,
         int have_offset, drc;
         const char *want_hash;
         const char *obj_end = strchr(p, '}');
+        const char *piece_limit = (obj_end && (!pieces_end || obj_end < pieces_end))
+                                  ? obj_end : pieces_end;
 
-        if (json_string_after(p, "url", url, sizeof(url)))
+        if (json_string_after(p, "url", url, sizeof(url), piece_limit))
             break;
-        json_u64_after(p, "fileSize", &expected);
-        have_offset = (json_u64_after(p, "fileOffset", &offset) == 0);
+        json_u64_after(p, "fileSize", &expected, piece_limit);
+        have_offset = (json_u64_after(p, "fileOffset", &offset, piece_limit) == 0);
 
         /* Piece already fully present from a previous run: skip the download. */
         if (!started && have_offset && expected &&
@@ -614,7 +831,7 @@ patchdl_http_download_manifest_progress(const char *manifest_url,
         /* A ranged piece can't be hashed (only its tail is fetched). */
         want_hash = NULL;
         if (range_start == 0 && verify) {
-            json_string_after(p, "hashValue", hash, sizeof(hash));
+            json_string_after(p, "hashValue", hash, sizeof(hash), piece_limit);
             want_hash = hash[0] ? hash : NULL;
         }
 
@@ -634,7 +851,8 @@ patchdl_http_download_manifest_progress(const char *manifest_url,
                 total = (long long)offset;
                 range_start = 0;
                 if (verify) {
-                    json_string_after(p, "hashValue", hash, sizeof(hash));
+                    json_string_after(p, "hashValue", hash, sizeof(hash),
+                                      piece_limit);
                     want_hash = hash[0] ? hash : NULL;
                 }
                 progress.base = total;
@@ -720,7 +938,8 @@ int
 patchdl_http_download_piece(const char *url, int fd,
                             long long file_offset, long long file_size,
                             const char *expected_sha256_or_null,
-                            patchdl_piece_ctx_t *ctx) {
+                            patchdl_piece_ctx_t *ctx,
+                            int *curl_rc_out, long *http_code_out) {
     CURL             *curl;
     CURLcode          res;
     long              http_code = 0;
@@ -730,6 +949,9 @@ patchdl_http_download_piece(const char *url, int fd,
     piece_sink_t      sink;
     int               verify = (expected_sha256_or_null && expected_sha256_or_null[0]);
 
+    if (curl_rc_out)   *curl_rc_out   = 0;
+    if (http_code_out) *http_code_out = 0;
+
     if (url_host(url, host, sizeof(host))) return -1;
     if (!host_allowed(host)) return -1;
     if (dns_lookup(host, ip, sizeof(ip))) return -1;
@@ -740,7 +962,7 @@ patchdl_http_download_piece(const char *url, int fd,
     sink.bytes_slot = ctx ? ctx->bytes_slot : NULL;
     if (verify) {
         sink.md = EVP_MD_CTX_new();
-        if (sink.md) EVP_DigestInit_ex(sink.md, EVP_sha256(), NULL);
+        if (sink.md) EVP_DigestInit_ex(sink.md, digest_for(expected_sha256_or_null), NULL);
     }
 
     snprintf(rs443, sizeof(rs443), "%s:443:%s", host, ip);
@@ -769,6 +991,9 @@ patchdl_http_download_piece(const char *url, int fd,
     curl_easy_setopt(curl, CURLOPT_SSL_CIPHER_LIST, "DEFAULT@SECLEVEL=0");
     curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION,  1L);
     curl_easy_setopt(curl, CURLOPT_MAXREDIRS,       5L);
+    /* HTTPS pin removed on the streaming piece path — see the same change in
+       http_download_to_file_progress for the why. */
+    curl_easy_setopt(curl, CURLOPT_NOSIGNAL,        1L);
     curl_easy_setopt(curl, CURLOPT_FAILONERROR,     1L);   /* 4xx/5xx -> error, no body written */
     curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT,  20L);
     curl_easy_setopt(curl, CURLOPT_LOW_SPEED_LIMIT, 1024L);
@@ -785,6 +1010,9 @@ patchdl_http_download_piece(const char *url, int fd,
     curl_easy_cleanup(curl);
     curl_slist_free_all(rl);
 
+    if (curl_rc_out)   *curl_rc_out   = (int)res;
+    if (http_code_out) *http_code_out = http_code;
+
     if (res != CURLE_OK) {
         if (sink.md) EVP_MD_CTX_free(sink.md);
         return -1;                          /* network error / abort */
@@ -797,8 +1025,9 @@ patchdl_http_download_piece(const char *url, int fd,
         unsigned char dig[EVP_MAX_MD_SIZE];
         unsigned int  dl = 0;
         char          hex[2 * EVP_MAX_MD_SIZE + 1];
-        EVP_DigestFinal_ex(sink.md, dig, &dl);
+        int           ok = EVP_DigestFinal_ex(sink.md, dig, &dl);
         EVP_MD_CTX_free(sink.md);
+        if (ok != 1 || dl == 0) return -2;
         hex_encode(dig, dl, hex, sizeof(hex));
         if (strcasecmp(hex, expected_sha256_or_null) != 0)
             return -2;                      /* integrity mismatch */
@@ -807,10 +1036,12 @@ patchdl_http_download_piece(const char *url, int fd,
     return 0;
 }
 
-/* Read-only: SHA-256 a [offset, offset+size) region of fd into out_hex (>=65
-   bytes). Uses pread so it doesn't disturb the fd offset. 0 on success. */
+/* Read-only: hash a [offset, offset+size) region of fd into out_hex (>=65
+   bytes), with the algorithm `like_hex` is written in (see digest_for). Uses
+   pread so it doesn't disturb the fd offset. 0 on success. */
 int
-patchdl_sha256_fd_region(int fd, long long offset, long long size, char *out_hex) {
+patchdl_hash_fd_region(int fd, long long offset, long long size,
+                       const char *like_hex, char *out_hex) {
     EVP_MD_CTX   *md;
     unsigned char *buf;
     long long      pos = offset, remaining = size;
@@ -822,7 +1053,7 @@ patchdl_sha256_fd_region(int fd, long long offset, long long size, char *out_hex
     if (!md) return -1;
     buf = malloc(CHUNK);
     if (!buf) { EVP_MD_CTX_free(md); return -1; }
-    EVP_DigestInit_ex(md, EVP_sha256(), NULL);
+    EVP_DigestInit_ex(md, digest_for(like_hex), NULL);
     while (remaining > 0) {
         size_t  want = remaining > (long long)CHUNK ? CHUNK : (size_t)remaining;
         ssize_t got  = pread(fd, buf, want, (off_t)pos);
@@ -833,8 +1064,9 @@ patchdl_sha256_fd_region(int fd, long long offset, long long size, char *out_hex
     {
         unsigned char dig[EVP_MAX_MD_SIZE];
         unsigned int  dl = 0, i;
-        EVP_DigestFinal_ex(md, dig, &dl);
-        for (i = 0; i < dl; i++) sprintf(out_hex + 2 * i, "%02x", dig[i]);
+        int           ok = EVP_DigestFinal_ex(md, dig, &dl);
+        if (ok != 1 || dl == 0) { free(buf); EVP_MD_CTX_free(md); return -1; }
+        for (i = 0; i < dl; i++) snprintf(out_hex + 2 * i, 3, "%02x", dig[i]);
         out_hex[2 * dl] = '\0';
     }
     free(buf);
@@ -859,6 +1091,8 @@ patchdl_fetch_manifest(const char *manifest_url, patchdl_manifest_t *out) {
     long long running = 0;
 
     memset(out, 0, sizeof(*out));
+    memset(&buf, 0, sizeof(buf));
+    buf.max = PATCHDL_BUF_MAX_MANIFEST;
     if (patchdl_http_get(manifest_url, &buf)) return -1;
     if (!buf.data || !buf.size) { free(buf.data); return -1; }
 
@@ -872,20 +1106,33 @@ patchdl_fetch_manifest(const char *manifest_url, patchdl_manifest_t *out) {
     out->pieces = calloc((size_t)cap, sizeof(patchdl_piece_t));
     if (!out->pieces) { free(buf.data); return -1; }
 
+    /* Sanity caps: refuse a manifest that would let a CDN drive multi-TB
+       allocations or millions of pieces. The biggest real PS5 patch we've
+       seen is ~70 GB / 18 pieces; these limits leave room to spare. */
+    if (cap > PATCHDL_MAX_PIECES) { free(buf.data); return -1; }
+
     p = pieces;
     while ((p = strstr(p, "\"url\"")) && (!pieces_end || p < pieces_end) && n < cap) {
         char               url[768] = {0};
         unsigned long long sz = 0, off = 0;
         const char        *obj_end = strchr(p, '}');
+        const char        *piece_limit = (obj_end && (!pieces_end || obj_end < pieces_end))
+                                         ? obj_end : pieces_end;
 
-        if (json_string_after(p, "url", url, sizeof(url)))
+        if (json_string_after(p, "url", url, sizeof(url), piece_limit))
             break;
-        json_u64_after(p, "fileSize", &sz);
-        if (json_u64_after(p, "fileOffset", &off) != 0)
+        json_u64_after(p, "fileSize", &sz, piece_limit);
+        if (json_u64_after(p, "fileOffset", &off, piece_limit) != 0)
             off = (unsigned long long)running;   /* no offset -> assume contiguous */
 
-        /* Validate tiling: pieces must be in order, contiguous, non-empty. */
-        if ((long long)off != running || sz == 0) {
+        /* Validate tiling: pieces must be in order, contiguous, non-empty,
+           and each individually under the per-piece cap. */
+        if ((long long)off != running || sz == 0 || sz > PATCHDL_MAX_PIECE_BYTES) {
+            patchdl_manifest_free(out);
+            free(buf.data);
+            return -1;
+        }
+        if ((unsigned long long)running + sz > PATCHDL_MAX_TOTAL_BYTES) {
             patchdl_manifest_free(out);
             free(buf.data);
             return -1;
@@ -894,7 +1141,7 @@ patchdl_fetch_manifest(const char *manifest_url, patchdl_manifest_t *out) {
         out->pieces[n].offset = (long long)off;
         out->pieces[n].size   = (long long)sz;
         json_string_after(p, "hashValue", out->pieces[n].hash,
-                          sizeof(out->pieces[n].hash));
+                          sizeof(out->pieces[n].hash), piece_limit);
         if (!out->pieces[n].url) {
             patchdl_manifest_free(out);
             free(buf.data);
@@ -905,6 +1152,8 @@ patchdl_fetch_manifest(const char *manifest_url, patchdl_manifest_t *out) {
         out->count = n;          /* keep current so manifest_free frees exactly n */
         p = obj_end ? obj_end + 1 : p + 5;
     }
+    json_string_after(buf.data, "playgoChunkCrcUrl", out->crc_url,
+                      sizeof(out->crc_url), NULL);
     free(buf.data);
     if (n == 0) { patchdl_manifest_free(out); return -1; }
     out->total = running;        /* authoritative assembled size */
@@ -944,6 +1193,9 @@ patchdl_net_diag(const char *url, char *out_json, size_t sz) {
             curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 1L);
             curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 2L);
             curl_easy_setopt(curl, CURLOPT_SSL_CIPHER_LIST, "DEFAULT@SECLEVEL=0");
+            curl_easy_setopt(curl, CURLOPT_PROTOCOLS_STR,       "https");
+            curl_easy_setopt(curl, CURLOPT_REDIR_PROTOCOLS_STR, "https");
+            curl_easy_setopt(curl, CURLOPT_NOSIGNAL,        1L);
             curl_easy_setopt(curl, CURLOPT_TIMEOUT, 15L);
             res = curl_easy_perform(curl);
             curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &http_code);

src/patchdl_net.h

@@ -1,3 +1,12 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later
+ * Copyright (C) 2026 Knutwurst
+ *
+ * PatchDL is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free
+ * Software Foundation, either version 3 of the License, or (at your option)
+ * any later version. See the LICENSE file in the project root for details.
+ */
+
 #pragma once
 
 #include <stddef.h>
@@ -6,6 +15,7 @@ typedef struct {
     char  *data;
     size_t size;
     size_t cap;
+    size_t max;     /* 0 = unbounded (legacy). Otherwise write_cb fails past this. */
 } patchdl_buf_t;
 
 patchdl_buf_t *patchdl_buf_new(void);
@@ -19,6 +29,13 @@ void patchdl_net_global_cleanup(void);
 
 int patchdl_http_get(const char *url, patchdl_buf_t *out);
 
+/* External-host variants: no Sony CA pinning, no Sony host allowlist.
+   SSL peer verification is disabled (PS5 has no system CA store; these
+   are used for public metadata only, never for sensitive data). */
+int patchdl_http_get_external(const char *url, patchdl_buf_t *out);
+int patchdl_http_post_external(const char *url, const char *content_type,
+                               const char *body, patchdl_buf_t *out);
+
 /* ---- parallel piece download (used by the connection pool) ------------- */
 
 /* One piece of a split manifest package. `url` is heap-allocated. */
@@ -26,13 +43,14 @@ typedef struct {
     char     *url;
     long long offset;     /* byte offset of this piece in the assembled file */
     long long size;       /* exact length of this piece */
-    char      hash[80];   /* manifest SHA-256 hex, or "" */
+    char      hash[80];   /* manifest hash hex (SHA-256, or SHA-1 for PS4), or "" */
 } patchdl_piece_t;
 
 typedef struct {
     patchdl_piece_t *pieces;
     int              count;
     long long        total;   /* assembled file size = sum of piece sizes */
+    char             crc_url[768]; /* playgoChunkCrcUrl, or "" */
 } patchdl_manifest_t;
 
 /* Fetch + parse a Sony JSON manifest into a validated, contiguously-tiled
@@ -41,6 +59,7 @@ typedef struct {
 int  patchdl_fetch_manifest(const char *manifest_url, patchdl_manifest_t *out);
 void patchdl_manifest_free(patchdl_manifest_t *m);
 
+
 /* Live state shared with one in-flight piece download. The worker owns these;
    the curl callbacks read `abort` (set elsewhere) and publish progress into
    `bytes_slot` (single-writer per worker slot). */
@@ -51,16 +70,20 @@ typedef struct {
 
 /* Download one whole piece and pwrite it into `fd` at `file_offset`. Concurrent
    non-overlapping pieces of the same fd are safe. Returns 0 on success (and
-   fdatasyncs fd), -1 on network/IO/abort, -2 on a SHA-256 mismatch. */
+   fdatasyncs fd), -1 on network/IO/abort, -2 on a SHA-256 mismatch.
+   `curl_rc_out`/`http_code_out` (either may be NULL) receive the last libcurl
+   CURLcode + HTTP status for failure diagnosis. */
 int patchdl_http_download_piece(const char *url, int fd,
                                 long long file_offset, long long file_size,
                                 const char *expected_sha256_or_null,
-                                patchdl_piece_ctx_t *ctx);
+                                patchdl_piece_ctx_t *ctx,
+                                int *curl_rc_out, long *http_code_out);
 
-/* Read-only: SHA-256 a [offset, offset+size) region of fd into out_hex
-   (caller provides >= 65 bytes). Returns 0 on success. */
-int patchdl_sha256_fd_region(int fd, long long offset, long long size,
-                             char *out_hex);
+/* Read-only: hash a [offset, offset+size) region of fd into out_hex
+   (caller provides >= 65 bytes), SHA-1 if like_hex has 40 hex digits (PS4
+   manifests), else SHA-256. Returns 0 on success. */
+int patchdl_hash_fd_region(int fd, long long offset, long long size,
+                           const char *like_hex, char *out_hex);
 
 /* Progress callback. Return non-zero to ABORT the in-flight download (used to
    cancel large patch downloads); return 0 to continue. */

src/patchdl_notify.c

@@ -1,3 +1,12 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later
+ * Copyright (C) 2026 Knutwurst
+ *
+ * PatchDL is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free
+ * Software Foundation, either version 3 of the License, or (at your option)
+ * any later version. See the LICENSE file in the project root for details.
+ */
+
 #include "patchdl_notify.h"
 #include "patchdl_version.h"
 

src/patchdl_notify.h

@@ -1,3 +1,12 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later
+ * Copyright (C) 2026 Knutwurst
+ *
+ * PatchDL is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free
+ * Software Foundation, either version 3 of the License, or (at your option)
+ * any later version. See the LICENSE file in the project root for details.
+ */
+
 #pragma once
 
 /* Send an on-screen PS5 notification at startup showing the web UI URL

src/patchdl_proc.c

@@ -1,3 +1,12 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later
+ * Copyright (C) 2026 Knutwurst
+ *
+ * PatchDL is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free
+ * Software Foundation, either version 3 of the License, or (at your option)
+ * any later version. See the LICENSE file in the project root for details.
+ */
+
 #include "patchdl_proc.h"
 
 #include <signal.h>
@@ -65,7 +74,10 @@ patchdl_proc_kill_others(const char *name) {
     int   killed = 0;
     pid_t pid;
 
-    while ((pid = find_pid(name)) > 0) {
+    /* Bound the loop: at startup we expect 0-1 stale instance. A pathological
+       proc table (or kill returning success but the process not exiting) would
+       otherwise stall startup for sleep(1) × N. */
+    while (killed < 8 && (pid = find_pid(name)) > 0) {
         if (kill(pid, SIGKILL))
             break;
         killed++;

src/patchdl_proc.h

@@ -1,3 +1,12 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later
+ * Copyright (C) 2026 Knutwurst
+ *
+ * PatchDL is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free
+ * Software Foundation, either version 3 of the License, or (at your option)
+ * any later version. See the LICENSE file in the project root for details.
+ */
+
 #pragma once
 
 /* Set this process's (main thread) name as shown in the PS5 process list. */

src/patchdl_prospero.c

@@ -0,0 +1,157 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later
+ * Copyright (C) 2026 Knutwurst
+ *
+ * PatchDL is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free
+ * Software Foundation, either version 3 of the License, or (at your option)
+ * any later version. See the LICENSE file in the project root for details.
+ */
+
+#include "patchdl_prospero.h"
+#include "patchdl_net.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define PROSPERO_BASE "https://prosperopatches.com"
+#define PROSPERO_API  PROSPERO_BASE "/api/internal"
+#define BUF_MAX       (512 * 1024)
+
+/* Prospero firmware strings use the same hex-digits-as-decimal encoding
+   as Sony's system_ver: "10.20.00.06" packs to 0x10200006.  Parse with
+   %x so the hex bytes compare correctly against g_fw.bin. */
+static uint32_t
+fw_str_to_bin(const char *s) {
+    unsigned a = 0, b = 0, c = 0, d = 0;
+    sscanf(s, "%x.%x.%x.%x", &a, &b, &c, &d);
+    return (a << 24) | (b << 16) | (c << 8) | d;
+}
+
+static void
+fw_bin_to_display(uint32_t bin, char *out, size_t sz) {
+    snprintf(out, sz, "%x.%02x", (bin >> 24) & 0xff, (bin >> 16) & 0xff);
+}
+
+/* Extract the first occurrence of `data-key="<hex>"` from HTML. */
+static int
+extract_data_key(const char *html, char *out, size_t out_sz) {
+    const char *needle = "data-key=\"";
+    const char *p = strstr(html, needle);
+    if (!p) return -1;
+    p += strlen(needle);
+    size_t len = 0;
+    while (p[len] && p[len] != '"' && len < out_sz - 1)
+        len++;
+    if (!len || p[len] != '"') return -1;
+    memcpy(out, p, len);
+    out[len] = '\0';
+    return 0;
+}
+
+/* Find the next JSON string value for a given key inside a JSON object
+   fragment.  Crude but sufficient for the predictable Prospero response. */
+static const char *
+json_str_val(const char *json, const char *key, char *out, size_t out_sz) {
+    char needle[64];
+    snprintf(needle, sizeof(needle), "\"%s\"", key);
+    const char *p = strstr(json, needle);
+    if (!p) return NULL;
+    p += strlen(needle);
+    while (*p == ' ' || *p == ':') p++;
+    if (*p != '"') return NULL;
+    p++;
+    size_t len = 0;
+    while (p[len] && p[len] != '"' && len < out_sz - 1)
+        len++;
+    memcpy(out, p, len);
+    out[len] = '\0';
+    return p + len + 1;
+}
+
+/* Check if a JSON fragment contains "success":true */
+static int
+json_success(const char *json) {
+    const char *p = strstr(json, "\"success\"");
+    if (!p) return 0;
+    p += 9;
+    while (*p == ' ' || *p == ':') p++;
+    return !strncmp(p, "true", 4);
+}
+
+int
+patchdl_prospero_query(const char *title_id, uint32_t fw_bin,
+                       patchdl_prospero_result_t *out) {
+    patchdl_buf_t buf;
+    char url[256], key[128], body[256];
+    char best_ver[16] = {0}, best_size[16] = {0};
+    uint32_t best_fw = 0;
+
+    if (!title_id || !out) return -1;
+    memset(out, 0, sizeof(*out));
+
+    /* Step 1: fetch the title page to get the data-key. */
+    memset(&buf, 0, sizeof(buf));
+    buf.max = BUF_MAX;
+    snprintf(url, sizeof(url), "%s/%.16s", PROSPERO_BASE, title_id);
+    if (patchdl_http_get_external(url, &buf)) return -1;
+    if (!buf.data) return -1;
+
+    if (extract_data_key(buf.data, key, sizeof(key))) {
+        free(buf.data);
+        return -1;
+    }
+    free(buf.data);
+
+    /* Step 2: POST loadpatches. The API expects JSON in the body but
+       application/x-www-form-urlencoded as Content-Type — this is how
+       the website and every known third-party client calls it. */
+    snprintf(body, sizeof(body),
+             "{\"titleid\":\"%.16s\",\"key\":\"%s\"}", title_id, key);
+
+    memset(&buf, 0, sizeof(buf));
+    buf.max = BUF_MAX;
+    if (patchdl_http_post_external(
+            PROSPERO_API "/loadpatches",
+            "application/x-www-form-urlencoded; charset=UTF-8",
+            body, &buf)) return -1;
+    if (!buf.data) return -1;
+
+    if (!json_success(buf.data)) {
+        free(buf.data);
+        return -1;
+    }
+
+    /* Walk the patches array. Each entry looks like:
+       {"content_ver":"01.003.000","required_firmware":"07.01.01.00",...}
+       Find the newest version whose firmware requirement is met. */
+    const char *cursor = buf.data;
+    while ((cursor = strstr(cursor, "\"content_ver\""))) {
+        char ver[16] = {0}, fw[32] = {0}, size[16] = {0};
+
+        json_str_val(cursor, "content_ver", ver, sizeof(ver));
+        json_str_val(cursor, "filesize", size, sizeof(size));
+        json_str_val(cursor, "required_firmware", fw, sizeof(fw));
+
+        if (ver[0] && fw[0]) {
+            uint32_t pkg_fw = fw_str_to_bin(fw);
+            if (pkg_fw <= fw_bin) {
+                if (!best_ver[0] || strcmp(ver, best_ver) > 0) {
+                    strncpy(best_ver, ver, sizeof(best_ver) - 1);
+                    memcpy(best_size, size, sizeof(best_size));
+                    best_fw = pkg_fw;
+                }
+            }
+        }
+        cursor++;
+    }
+    free(buf.data);
+
+    if (best_ver[0]) {
+        strncpy(out->version, best_ver, sizeof(out->version) - 1);
+        fw_bin_to_display(best_fw, out->required_fw, sizeof(out->required_fw));
+        memcpy(out->size, best_size, sizeof(out->size));
+        out->found = 1;
+    }
+    return 0;
+}

src/patchdl_prospero.h

@@ -0,0 +1,27 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later
+ * Copyright (C) 2026 Knutwurst
+ *
+ * PatchDL is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free
+ * Software Foundation, either version 3 of the License, or (at your option)
+ * any later version. See the LICENSE file in the project root for details.
+ */
+
+#pragma once
+
+#include <stdint.h>
+
+typedef struct {
+    char version[16];      /* e.g. "01.003.000" */
+    char required_fw[16];  /* PatchDL display format, e.g. "7.01" */
+    char size[16];         /* Prospero's label, e.g. "71.7 GB" (GiB, rounded up) */
+    int  found;
+} patchdl_prospero_result_t;
+
+/* Query prosperopatches.com for the newest patch of `title_id` whose
+   firmware requirement is <= fw_bin. Returns 0 on success (result may
+   still have found==0 if no compatible patch exists), -1 on network or
+   parse failure. Best-effort: a failure means the UI shows no Prospero
+   data, nothing breaks. */
+int patchdl_prospero_query(const char *title_id, uint32_t fw_bin,
+                           patchdl_prospero_result_t *out);

src/patchdl_resolve.c

@@ -1,5 +1,15 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later
+ * Copyright (C) 2026 Knutwurst
+ *
+ * PatchDL is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free
+ * Software Foundation, either version 3 of the License, or (at your option)
+ * any later version. See the LICENSE file in the project root for details.
+ */
+
 #include "patchdl_resolve.h"
 
+#include <openssl/hmac.h>
 #include <stdio.h>
 #include <string.h>
 
@@ -27,6 +37,14 @@ lookup_tsv(const char *title_id, char *url_out, size_t url_sz) {
             fclose(fp);
             return -1;
         }
+        /* Defense in depth: the TSV file lives under /data/patchdl, writable
+           by anyone with /data access. patchdl_http_get also enforces
+           host_allowed, but rejecting non-https / non-Sony schemes here means
+           a poisoned line can't even reach the network layer. */
+        if (strncmp(url, "https://", 8) != 0) {
+            fclose(fp);
+            return -1;
+        }
         memcpy(url_out, url, len + 1);
         fclose(fp);
         return 0;
@@ -35,20 +53,43 @@ lookup_tsv(const char *title_id, char *url_out, size_t url_sz) {
     return -1;
 }
 
+/* PS4 titles: Sony's update list lives at a path derived from the title id
+   with HMAC-SHA256 under a key that is part of the PS4 system software and
+   widely published (it's how every PS4 update checker finds patches). */
+static const unsigned char PS4_UPDATE_KEY[32] = {
+    0xAD, 0x62, 0xE3, 0x7F, 0x90, 0x5E, 0x06, 0xBC, 0x19, 0x59, 0x31, 0x42,
+    0x28, 0x1C, 0x11, 0x2C, 0xEC, 0x0E, 0x7E, 0xC3, 0xE9, 0x7E, 0xFD, 0xCA,
+    0xEF, 0xCD, 0xBA, 0xAF, 0xA6, 0x37, 0x8D, 0x84,
+};
+
 static int
-lookup_prosperopatches(const char *title_id, char *url_out, size_t url_sz) {
-    /* TODO: implement live lookup once API endpoint is confirmed on-device.
-       prosperopatches.com serves Sony CDN index links for PS5 titles. */
-    (void)title_id;
-    (void)url_out;
-    (void)url_sz;
-    return -1;
+ps4_update_url(const char *title_id, char *url_out, size_t url_sz) {
+    unsigned char mac[32];
+    unsigned int  mac_len = 0;
+    char          msg[24], hex[65];
+    int           n;
+
+    if (strlen(title_id) != 9) return -1;
+    n = snprintf(msg, sizeof msg, "np_%s", title_id);
+    if (!HMAC(EVP_sha256(), PS4_UPDATE_KEY, sizeof PS4_UPDATE_KEY,
+              (const unsigned char *)msg, (size_t)n, mac, &mac_len) ||
+        mac_len != sizeof mac)
+        return -1;
+    for (unsigned i = 0; i < mac_len; i++)
+        snprintf(hex + 2 * i, 3, "%02x", mac[i]);
+    n = snprintf(url_out, url_sz,
+                 "https://gs-sec.ww.np.dl.playstation.net/plo/np/%s/%s/%s-ver.xml",
+                 title_id, hex, title_id);
+    return (n > 0 && (size_t)n < url_sz) ? 0 : -1;
 }
 
 int
 patchdl_resolve_url(const char *title_id, char *url_out, size_t url_sz) {
     if (!title_id) return -1;
 
+    if (!strncmp(title_id, "CUSA", 4))
+        return ps4_update_url(title_id, url_out, url_sz);
+
     /* Only PS5 native title IDs (PPSA/PPSE/PPSH/PPSJ/PPSC) */
     if (strncmp(title_id, "PPSA", 4) &&
         strncmp(title_id, "PPSE", 4) &&
@@ -57,8 +98,5 @@ patchdl_resolve_url(const char *title_id, char *url_out, size_t url_sz) {
         strncmp(title_id, "PPSC", 4))
         return -1;
 
-    if (!lookup_tsv(title_id, url_out, url_sz))
-        return 0;
-
-    return lookup_prosperopatches(title_id, url_out, url_sz);
+    return lookup_tsv(title_id, url_out, url_sz);
 }

src/patchdl_resolve.h

@@ -1,3 +1,12 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later
+ * Copyright (C) 2026 Knutwurst
+ *
+ * PatchDL is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free
+ * Software Foundation, either version 3 of the License, or (at your option)
+ * any later version. See the LICENSE file in the project root for details.
+ */
+
 #pragma once
 
 #include <stddef.h>

src/patchdl_scan.c

@@ -1,10 +1,21 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later
+ * Copyright (C) 2026 Knutwurst
+ *
+ * PatchDL is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free
+ * Software Foundation, either version 3 of the License, or (at your option)
+ * any later version. See the LICENSE file in the project root for details.
+ */
+
 #include "patchdl_scan.h"
 #include "patchdl_appdb.h"
 
 #include <ps5/kernel.h>
 
 #include <dirent.h>
+#include <fcntl.h>
 #include <limits.h>
+#include <stdatomic.h>
 #include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -23,6 +34,26 @@ static const char *SCAN_DIRS[] = {
     NULL,
 };
 
+/* The first scan runs single-threaded with the process root swapped to the
+   system root and keeps a handle to that root. Later scans (other threads are
+   running, so the root must not move) change only the working directory to
+   it and drop the leading '/' of every path, see sys_path. Nothing else in
+   PatchDL opens relative paths. */
+static int g_sysroot_fd = -1;
+static int g_rel_paths;
+/* Step the running scan is in, for diagnosing slow rescans. */
+static const char *volatile g_scan_step = "idle";
+
+const char *
+patchdl_scan_step(void) {
+    return g_scan_step;
+}
+
+static const char *
+sys_path(const char *p) {
+    return (g_rel_paths && p[0] == '/') ? p + 1 : p;
+}
+
 /* ---------- param.json -------------------------------------------------- */
 
 static int
@@ -80,7 +111,7 @@ try_param_json(const char *dir, patchdl_title_t *t) {
     size_t n;
 
     snprintf(path, sizeof(path), "%s/sce_sys/param.json", dir);
-    fp = fopen(path, "r");
+    fp = fopen(sys_path(path), "r");
     if (!fp) return -1;
     n = fread(buf, 1, sizeof(buf) - 1, fp);
     fclose(fp);
@@ -179,7 +210,7 @@ try_param_sfo(const char *dir, patchdl_title_t *t) {
     struct stat st;
 
     snprintf(path, sizeof(path), "%s/sce_sys/param.sfo", dir);
-    fp = fopen(path, "rb");
+    fp = fopen(sys_path(path), "rb");
     if (!fp) return -1;
 
     if (fstat(fileno(fp), &st) || (size_t)st.st_size > sizeof(buf)) {
@@ -208,7 +239,7 @@ path_exists(const char *dir, const char *rel) {
     char p[PATH_MAX];
     struct stat st;
     snprintf(p, sizeof(p), "%s/%s", dir, rel);
-    return stat(p, &st) == 0;
+    return stat(sys_path(p), &st) == 0;
 }
 
 /* Read up to sz-1 bytes of dir/rel into buf (NUL-terminated). 0 on success. */
@@ -219,7 +250,7 @@ read_small_file(const char *dir, const char *rel, char *buf, size_t sz) {
     size_t n;
 
     snprintf(p, sizeof(p), "%s/%s", dir, rel);
-    fp = fopen(p, "rb");
+    fp = fopen(sys_path(p), "rb");
     if (!fp) return -1;
     n = fread(buf, 1, sz - 1, fp);
     fclose(fp);
@@ -227,13 +258,42 @@ read_small_file(const char *dir, const char *rel, char *buf, size_t sz) {
     return 0;
 }
 
-/* Keep only actual games. Skip PS5 system apps (NPXS), the Payload Manager
-   fake app (PLDM) and ELF-loader homebrew (PSPS). */
+/* Tell a Sony-signed package from a debug/fake-signed one by its header.
+   PS5 finalized image "\x7FFIH": byte 0x05 is 0x80 for retail, 0x00 for
+   debug (matches Sony's CDN patches, which start 7F 46 49 48 01 80).
+   PS4 container "\x7FCNT": bit 0 of byte 4 is set for retail, clear for a
+   fake package (same test Itemzflow uses). */
+static patchdl_pkg_sign_t
+pkg_sign_state(const char *dir) {
+    char          p[PATH_MAX];
+    unsigned char h[8];
+    FILE         *fp;
+    size_t        n;
+
+    snprintf(p, sizeof(p), "%s/app.pkg", dir);
+    fp = fopen(sys_path(p), "rb");
+    if (!fp) return PATCHDL_PKG_UNREAD;
+    n = fread(h, 1, sizeof(h), fp);
+    fclose(fp);
+    if (n < sizeof(h)) return PATCHDL_PKG_UNREAD;
+
+    if (!memcmp(h, "\x7f" "FIH", 4))
+        return (h[5] & 0x80) ? PATCHDL_PKG_RETAIL : PATCHDL_PKG_FAKE;
+    if (!memcmp(h, "\x7f" "CNT", 4))
+        return (h[4] & 0x01) ? PATCHDL_PKG_RETAIL : PATCHDL_PKG_FAKE;
+    return PATCHDL_PKG_UNREAD;
+}
+
+/* Keep only actual games: PS5 (PPSA) and PS4 (CUSA) title ids followed by
+   five digits. System apps (NPXS) and homebrew with made-up ids (PatchDL's
+   own tile PTDL00001, loaders, file managers) have no Sony updates. */
 static int
 is_game_title(const char *title_id) {
-    if (!strncmp(title_id, "NPXS", 4)) return 0;
-    if (!strncmp(title_id, "PLDM", 4)) return 0;
-    if (!strncmp(title_id, "PSPS", 4)) return 0;
+    if (strncmp(title_id, "PPSA", 4) && strncmp(title_id, "CUSA", 4))
+        return 0;
+    for (int i = 4; i < 9; i++)
+        if (title_id[i] < '0' || title_id[i] > '9')
+            return 0;
     return 1;
 }
 
@@ -260,19 +320,23 @@ mount_is_shadow(const char *title_id, const struct statfs *mounts, int nmounts)
  * Classify each /user/app/<TID> (verified on fw 11.60):
  *   - mount table references /mnt/shadowmnt for the title -> ShadowMountPlus
  *     mount (authoritative; mount.lnk is only a fallback hint)
- *   - app.pkg (no shadow mount) -> genuine install; app.json with CDN piece
- *     URLs means a not-downloaded preinstall stub, local URLs a real install
- *   - app.json with "fake":true -> homebrew fake (skip)
+ *   - app.pkg (no shadow mount) -> its header decides: Sony-signed is a
+ *     genuine install (store or disc), debug/fake-signed is a fake package
+ *     (listed, but never checked, downloaded or patched), unreadable is unknown
+ *   - app.json with "fake":true and no app.pkg -> homebrew (skip). With an
+ *     app.pkg the marker only says the package did not come from Sony's CDN
+ *     (PatchDL's own loopback install sets it too), so the header decides.
  */
 static int
 scan_one(const char *base, const char *name, patchdl_title_t *t,
          const struct statfs *mounts, int nmounts) {
     char dir[PATH_MAX];
     char appjson[4096];
-    int  has_mountlnk, has_app_pkg, has_paramjson, is_shadow, is_fake = 0, is_cdn = 0;
+    int  has_mountlnk, has_app_pkg, has_paramjson, is_shadow, is_fake = 0;
 
     snprintf(dir, sizeof(dir), "%s/%s", base, name);
     memset(t, 0, sizeof(*t));
+    t->icon_fd = -1;
     strncpy(t->source_path, dir, sizeof(t->source_path) - 1);
     strncpy(t->title_id, name, sizeof(t->title_id) - 1);
 
@@ -288,10 +352,10 @@ scan_one(const char *base, const char *name, patchdl_title_t *t,
     if (!read_small_file(dir, "app.json", appjson, sizeof(appjson))) {
         if (strstr(appjson, "\"fake\"") && strstr(appjson, "true"))
             is_fake = 1;
-        if (strstr(appjson, "http"))
-            is_cdn = 1; /* piece URLs point at the Sony CDN -> preinstall */
     }
-    if (is_fake)
+    /* "fake": true marks both homebrew and installed fake packages. Only
+       homebrew (no app.pkg) drops out; a fake package stays in the list. */
+    if (is_fake && !has_app_pkg)
         return -1;
 
     /* app.pkg is the on-disk package of a genuine install; ShadowMountPlus
@@ -299,8 +363,16 @@ scan_one(const char *base, const char *name, patchdl_title_t *t,
        app.pkg is the reliable genuine-vs-shadow discriminator — independent of
        whether the shadow image is currently mounted. */
     if (has_app_pkg) {
-        t->source_type = is_cdn ? PATCHDL_SOURCE_UNKNOWN  /* CDN pkg = preinstall */
-                                : PATCHDL_SOURCE_OFFICIAL;
+        /* app.json piece URLs are no signal: disc and store installs carry
+           CDN URLs there too. The package header is. */
+        t->pkg_sign = pkg_sign_state(dir);
+        /* The header wins over the installer's fake marker: a retail package
+           installed from a local URL is marked fake but is still Sony's. The
+           marker only decides when the header can't be read. */
+        t->source_type = t->pkg_sign == PATCHDL_PKG_RETAIL ? PATCHDL_SOURCE_OFFICIAL
+                       : (is_fake || t->pkg_sign == PATCHDL_PKG_FAKE)
+                                                   ? PATCHDL_SOURCE_FAKE
+                                                   : PATCHDL_SOURCE_UNKNOWN;
     } else if (is_shadow || has_mountlnk || has_paramjson ||
                path_exists(dir, "sce_sys/param.sfo")) {
         if (try_param_json(dir, t)) /* metadata from the mounted sce_sys */
@@ -332,7 +404,7 @@ scan_base(const char *base, patchdl_title_t *arr, size_t *cnt, size_t cap,
     DIR           *d;
     struct dirent *de;
 
-    d = opendir(base);
+    d = opendir(sys_path(base));
     if (!d) return;
 
     while ((de = readdir(d))) {
@@ -355,20 +427,90 @@ patchdl_source_str(patchdl_source_t src) {
     case PATCHDL_SOURCE_OFFICIAL:    return "official";
     case PATCHDL_SOURCE_EXTERNAL:    return "external";
     case PATCHDL_SOURCE_SHADOWMOUNT: return "shadowmount";
+    case PATCHDL_SOURCE_FAKE:        return "fake";
     default:                          return "unknown";
     }
 }
 
+/* Open a title's icon0.png while the scan still sees the whole filesystem.
+   The web server can't reach these paths later, but an fd opened now stays
+   readable. Tries the app.db path first, then the usual install locations.
+   Returns an fd to a non-empty PNG of sane size, or -1. */
+#define ICON_MAX_BYTES (4 * 1024 * 1024)
+
+static int
+open_png(const char *path) {
+    unsigned char magic[8];
+    struct stat   st;
+    int           fd;
+
+    if (!path || path[0] != '/') return -1;
+    fd = open(sys_path(path), O_RDONLY | O_CLOEXEC);
+    if (fd < 0) return -1;
+    if (fstat(fd, &st) || !S_ISREG(st.st_mode) ||
+        st.st_size < 8 || st.st_size > ICON_MAX_BYTES ||
+        pread(fd, magic, 8, 0) != 8 ||
+        memcmp(magic, "\x89PNG\r\n\x1a\n", 8)) {
+        close(fd);
+        return -1;
+    }
+    return fd;
+}
+
+static int
+open_icon(const patchdl_title_t *t, const char *db_path) {
+    static const char *const candidates[] = {
+        "/user/appmeta/%s/icon0.png",
+        "/user/appmeta/external/%s/icon0.png",
+        "%s/sce_sys/icon0.png",            /* source_path, e.g. a shadowmount */
+        NULL,
+    };
+    char path[PATH_MAX];
+    int  fd = open_png(db_path);
+
+    for (int i = 0; fd < 0 && candidates[i]; i++) {
+        snprintf(path, sizeof(path), candidates[i],
+                 i < 2 ? t->title_id : t->source_path);
+        fd = open_png(path);
+    }
+    return fd;
+}
+
+/* After an install the console rewrites /user/appmeta/<id>/param.json at
+   once, while app.db keeps the old CONTENT_VERSION until later (seen: until
+   the game was started). Take the newer of the two so a finished update
+   doesn't look pending. */
+static void
+newer_appmeta_version(patchdl_title_t *t) {
+    char path[PATH_MAX], buf[8192], ver[16] = {0};
+    FILE *fp;
+    size_t n;
+
+    snprintf(path, sizeof(path), "/user/appmeta/%s/param.json", t->title_id);
+    if (!(fp = fopen(sys_path(path), "r"))) return;
+    n = fread(buf, 1, sizeof(buf) - 1, fp);
+    fclose(fp);
+    buf[n] = '\0';
+    if (json_str(buf, "contentVersion", ver, sizeof(ver)) == 0 &&
+        strcmp(ver, t->installed_version) > 0)
+        snprintf(t->installed_version, sizeof(t->installed_version), "%s", ver);
+}
+
 /* Overlay app.db metadata (real title name, installed version, version.xml
    URL) onto the scanned titles. Genuine installs have no readable param.json,
    so this is the only source of their name/version. */
-static void
+static int
 merge_appdb(patchdl_title_t *arr, size_t cnt) {
     patchdl_appinfo_t *info = NULL;
     size_t n = 0;
 
-    if (patchdl_appdb_load(&info, &n))
-        return;
+    {
+        int rc = patchdl_appdb_load(&info, &n, g_rel_paths);
+        if (rc) {
+            g_scan_step = rc == -2 ? patchdl_appdb_error() : "fail: appdb read";
+            return -1;
+        }
+    }
 
     for (size_t i = 0; i < cnt; i++) {
         const patchdl_appinfo_t *a = patchdl_appdb_find(info, n, arr[i].title_id);
@@ -386,31 +528,94 @@ merge_appdb(patchdl_title_t *arr, size_t cnt) {
                     sizeof(arr[i].version_file_uri) - 1);
     }
 
+    g_scan_step = "icons";
+    for (size_t i = 0; i < cnt; i++) {
+        const patchdl_appinfo_t *a = patchdl_appdb_find(info, n, arr[i].title_id);
+        arr[i].icon_fd = open_icon(&arr[i], a ? a->icon_path : NULL);
+        if (arr[i].pkg_sign != PATCHDL_PKG_NONE)
+            newer_appmeta_version(&arr[i]);
+    }
+
     patchdl_appdb_free(info);
+    return 0;
 }
 
-int
-patchdl_scan(patchdl_title_t **titles_out, size_t *count_out) {
+/* See patchdl_scan_lock — once set, patchdl_scan no longer swaps the root
+   (it rescans via the kept system root handle) and the debug dump returns
+   NULL, so neither can race the running MHD threads. */
+static _Atomic int g_scan_locked = 0;
+
+void
+patchdl_scan_lock(void) {
+    atomic_store(&g_scan_locked, 1);
+}
+
+static int
+scan_all(patchdl_title_t **titles_out, size_t *count_out) {
     patchdl_title_t *arr;
     size_t cnt = 0;
-    pid_t pid = getpid();
-    intptr_t saved_root = 0, root_vnode;
-    int using_vswap = 0;
-
     struct statfs *mounts = NULL;
     int            nmounts;
 
     arr = calloc(MAX_TITLES, sizeof(*arr));
-    if (!arr) return -1;
+    if (!arr) { g_scan_step = "fail: oom"; return -1; }
+
+    /* Global mount table for shadowmount detection. getmntinfo's buffer is
+       libc-managed — must NOT be freed. */
+    g_scan_step = "mounts";
+    nmounts = getmntinfo(&mounts, MNT_NOWAIT);
+    if (nmounts < 0) { nmounts = 0; mounts = NULL; }
+
+    for (int i = 0; SCAN_DIRS[i]; i++) {
+        g_scan_step = SCAN_DIRS[i];
+        scan_base(SCAN_DIRS[i], arr, &cnt, MAX_TITLES, mounts, nmounts);
+    }
+    g_scan_step = "appdb";
+
+    /* At startup a list without app.db data still beats none. A rescan
+       without it would wipe names and versions of a good list: fail instead
+       and keep the old one. */
+    if (merge_appdb(arr, cnt) && g_rel_paths) {
+        free(arr);
+        return -1;
+    }
+    g_scan_step = "idle";
+
+    *titles_out = arr;
+    *count_out  = cnt;
+    return 0;
+}
+
+/* A rescan while other threads run: resolve every path from the system root
+   kept by the first scan, without touching the process root. */
+static int
+rescan_relative(patchdl_title_t **titles_out, size_t *count_out) {
+    int cwd, rc;
+
+    if (g_sysroot_fd < 0) { g_scan_step = "fail: no system root handle"; return -1; }
+    cwd = open(".", O_RDONLY | O_DIRECTORY | O_CLOEXEC);
+    if (cwd < 0) { g_scan_step = "fail: open cwd"; return -1; }
+    if (fchdir(g_sysroot_fd)) { g_scan_step = "fail: fchdir"; close(cwd); return -1; }
+    g_rel_paths = 1;
+    rc = scan_all(titles_out, count_out);
+    g_rel_paths = 0;
+    (void)fchdir(cwd);   /* best effort: nothing else uses the cwd */
+    close(cwd);
+    return rc;
+}
+
+int
+patchdl_scan(patchdl_title_t **titles_out, size_t *count_out) {
+    pid_t pid = getpid();
+    intptr_t saved_root = 0, root_vnode;
+    int using_vswap = 0, rc;
 
     /* Elevate so privileged paths (the app.db under /system_data) are
        readable; same authid ftpsrv uses. No-op without kernel R/W. */
     kernel_set_ucred_authid(pid, 0x4801000000000013L);
 
-    /* Global mount table for shadowmount detection. getmntinfo's buffer is
-       libc-managed — must NOT be freed. */
-    nmounts = getmntinfo(&mounts, MNT_NOWAIT);
-    if (nmounts < 0) { nmounts = 0; mounts = NULL; }
+    if (atomic_load(&g_scan_locked))
+        return rescan_relative(titles_out, count_out);
 
     root_vnode = kernel_get_root_vnode();
     if (root_vnode) {
@@ -421,25 +626,91 @@ patchdl_scan(patchdl_title_t **titles_out, size_t *count_out) {
         if (saved_root) {
             kernel_set_proc_rootdir(pid, root_vnode);
             using_vswap = 1;
+            if (g_sysroot_fd < 0)
+                g_sysroot_fd = open("/", O_RDONLY | O_DIRECTORY | O_CLOEXEC);
         }
     }
 
-    for (int i = 0; SCAN_DIRS[i]; i++)
-        scan_base(SCAN_DIRS[i], arr, &cnt, MAX_TITLES, mounts, nmounts);
-
-    merge_appdb(arr, cnt);
+    rc = scan_all(titles_out, count_out);
 
     if (using_vswap)
         kernel_set_proc_rootdir(pid, saved_root);
+    return rc;
+}
 
-    *titles_out = arr;
-    *count_out  = cnt;
-    return 0;
+static const char *PATCH_DIRS[] = {
+    "/user/patch",
+    "/mnt/ext0/user/patch",
+    "/mnt/ext1/user/patch",
+    NULL,
+};
+
+static int
+read_title_file(const char *const *bases, const char *title_id, const char *name,
+                char *buf, size_t sz) {
+    char path[PATH_MAX];
+    if (g_sysroot_fd < 0 || !sz) return -1;
+    for (int i = 0; bases[i]; i++) {
+        int     fd;
+        ssize_t n;
+        snprintf(path, sizeof(path), "%s/%s/%s", bases[i] + 1, title_id, name);
+        fd = openat(g_sysroot_fd, path, O_RDONLY | O_CLOEXEC);
+        if (fd < 0) continue;
+        n = read(fd, buf, sz - 1);
+        close(fd);
+        if (n < 0) return -1;
+        buf[n] = '\0';
+        return 0;
+    }
+    return -1;
+}
+
+int
+patchdl_scan_read_app_file(const char *title_id, const char *name,
+                           char *buf, size_t sz) {
+    return read_title_file(SCAN_DIRS, title_id, name, buf, sz);
+}
+
+int
+patchdl_scan_read_patch_file(const char *title_id, const char *name,
+                             char *buf, size_t sz) {
+    return read_title_file(PATCH_DIRS, title_id, name, buf, sz);
+}
+
+/* Fold one stat result into an FNV-1a hash. */
+static unsigned long long
+sig_add(unsigned long long h, const char *rel) {
+    struct stat st;
+    long long   v[4] = {0};
+    if (fstatat(g_sysroot_fd, rel, &st, 0) == 0) {
+        v[0] = (long long)st.st_mtim.tv_sec;
+        v[1] = (long long)st.st_mtim.tv_nsec;
+        v[2] = (long long)st.st_size;
+        v[3] = (long long)st.st_ino;
+    }
+    for (size_t i = 0; i < sizeof v; i++) {
+        h ^= ((const unsigned char *)v)[i];
+        h *= 1099511628211ULL;
+    }
+    return h;
+}
+
+unsigned long long
+patchdl_scan_signature(void) {
+    unsigned long long h = 14695981039346656037ULL;
+    if (g_sysroot_fd < 0) return 0;
+    for (int i = 0; SCAN_DIRS[i]; i++)
+        h = sig_add(h, SCAN_DIRS[i] + 1);
+    h = sig_add(h, "system_data/priv/mms/app.db");
+    h = sig_add(h, "system_data/priv/mms/app.db-wal");
+    return h ? h : 1;
 }
 
 void
 patchdl_scan_free(patchdl_title_t *titles, size_t count) {
-    (void)count;
+    for (size_t i = 0; titles && i < count; i++)
+        if (titles[i].icon_fd >= 0)
+            close(titles[i].icon_fd);
     free(titles);
 }
 
@@ -467,6 +738,8 @@ patchdl_scan_debug_json(void) {
     char   tmp[2048];
     pid_t  pid = getpid();
     intptr_t saved_root = 0, root_vnode;
+
+    if (atomic_load(&g_scan_locked)) return NULL;
     int    using_vswap = 0;
     struct statfs *mounts = NULL;
     int    nmounts;

src/patchdl_scan.h

@@ -1,3 +1,12 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later
+ * Copyright (C) 2026 Knutwurst
+ *
+ * PatchDL is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free
+ * Software Foundation, either version 3 of the License, or (at your option)
+ * any later version. See the LICENSE file in the project root for details.
+ */
+
 #pragma once
 
 #include <stddef.h>
@@ -8,8 +17,17 @@ typedef enum {
     PATCHDL_SOURCE_EXTERNAL    = 1,
     PATCHDL_SOURCE_SHADOWMOUNT = 2,
     PATCHDL_SOURCE_UNKNOWN     = 3,
+    PATCHDL_SOURCE_FAKE        = 4, /* debug/fake-signed package: not supported */
 } patchdl_source_t;
 
+/* Signing state read from the installed app.pkg header. */
+typedef enum {
+    PATCHDL_PKG_NONE    = 0, /* no app.pkg */
+    PATCHDL_PKG_RETAIL  = 1,
+    PATCHDL_PKG_FAKE    = 2,
+    PATCHDL_PKG_UNREAD  = 3, /* app.pkg present but header unreadable/unknown */
+} patchdl_pkg_sign_t;
+
 typedef struct {
     char             title_id[32];
     char             content_id[64];
@@ -19,16 +37,29 @@ typedef struct {
     char             mount_from[256];
     char             version_file_uri[256]; /* from app.db, for version.xml */
     patchdl_source_t source_type;
+    patchdl_pkg_sign_t pkg_sign;      /* app.pkg header verdict, for diagnostics */
+    int              icon_fd;          /* open icon0.png, or -1; see patchdl_scan */
     /* populated by background verxml fetch — guarded by websrv mutex */
     char             compatible_version[16];
     char             latest_version[16];
     char             latest_required_fw[16];
     char             patch_url[512];   /* manifest_url if present, otherwise pkg URL */
+    char             delta_url[512];   /* DP.pkg bootstrap URL (always a PKG) */
     char             patch_title_id[16]; /* target title id from version.xml */
     char             patch_storage_title_id[16]; /* title id embedded in delta_url */
     int              verxml_done;
+    /* Prospero Patches lookup (best compatible patch from version history) */
+    char             prospero_version[16];
+    char             prospero_required_fw[16];
+    char             prospero_size[16];
+    int              prospero_done;
+    /* Manifest URL derived from a link the user pasted from Prospero. When
+       set it replaces patch_url for download and install. */
+    char             manual_url[512];
+    char             manual_version[16];
     int              enabled;          /* user policy, persisted in config.json */
     int              resumable;        /* a partial download is on disk */
+    int              downloaded;       /* a finished download is on disk */
     long long        partial_bytes;    /* size of that partial, for the UI */
 } patchdl_title_t;
 
@@ -39,3 +70,28 @@ const char *patchdl_source_str(patchdl_source_t src);
 /* Diagnostic: malloc'd JSON dump of the mount table + scan-base directory
    listings. Caller frees. */
 char       *patchdl_scan_debug_json(void);
+
+/* Cheap change check for the automatic rescan: a hash over the title
+   directories and Sony's app.db. 0 when it can't be computed (no system root
+   handle), so callers never rescan on it. */
+unsigned long long patchdl_scan_signature(void);
+
+/* Name of the step the running scan is in ("idle" when none). */
+const char *patchdl_scan_step(void);
+
+/* Read <title dir>/<name> of an installed title (e.g. app.json) through the
+   kept system root handle; thread-safe, no working-directory change.
+   0 on success with a NUL-terminated buf. */
+int patchdl_scan_read_app_file(const char *title_id, const char *name,
+                               char *buf, size_t sz);
+/* Same for an installed PS4 patch: /user/patch/<id>/<name>. */
+int patchdl_scan_read_patch_file(const char *title_id, const char *name,
+                                 char *buf, size_t sz);
+
+/* Mark scan/debug as no longer safe to call (must be set after MHD worker
+   threads come up — patchdl_scan performs a process-wide vnode swap that
+   would race any concurrent thread). After this is set, patchdl_scan rescans
+   through the system root handle kept by the first scan (working directory
+   only, one caller at a time) and the debug dump returns NULL. Call once
+   during startup, after MHD_start_daemon. */
+void        patchdl_scan_lock(void);

src/patchdl_tile.c

@@ -0,0 +1,231 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later
+ * Copyright (C) 2026 Knutwurst
+ *
+ * PatchDL is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free
+ * Software Foundation, either version 3 of the License, or (at your option)
+ * any later version. See the LICENSE file in the project root for details.
+ */
+
+#include "patchdl_tile.h"
+#include "patchdl_install.h"
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include <ps5/kernel.h>
+
+/* Embed the tile assets into .rodata directly via .incbin — no codegen step,
+   no Python helper, no second translation unit. */
+#define INCASSET(name, file)                                                  \
+    __asm__(".section .rodata\n"                                              \
+            ".global " #name "\n"                                             \
+            ".global " #name "_end\n"                                         \
+            ".global " #name "_size\n"                                        \
+            ".align 16\n" #name ":\n"                                         \
+            ".incbin \"" file "\"\n" #name "_end:\n" #name "_size:\n"         \
+            ".quad " #name "_end - " #name "\n"                               \
+            ".previous\n");                                                   \
+    extern const uint8_t name[];                                              \
+    extern const size_t  name##_size;
+
+INCASSET(tile_param_json, "assets/param.json");
+INCASSET(tile_icon0_png,  "assets/icon0.png");
+
+#define TILE_TITLE_ID "PTDL00001"
+
+/* Forward decls — we resolve sceAppInstUtilInitialize/AppInstallTitleDir at
+   runtime via the kernel dynlib helpers so the ELF stays loader-friendly. */
+typedef int (*ai_init_fn)(void);
+typedef int (*ai_install_dir_fn)(const char *title_id, const char *parent_dir,
+                                  void *opts);
+typedef int (*ai_install_all_fn)(void *opts);
+
+static intptr_t
+dynsym_by_name(const char *sym) {
+    uint32_t h = 0;
+    if (kernel_dynlib_handle(-1, "libSceAppInstUtil.sprx", &h) < 0) return 0;
+    return kernel_dynlib_dlsym(-1, h, sym);
+}
+
+static intptr_t
+dynsym_by_nid(const char *nid) {
+    uint32_t h = 0;
+    if (kernel_dynlib_handle(-1, "libSceAppInstUtil.sprx", &h) < 0) return 0;
+    return kernel_dynlib_resolve(-1, h, nid);
+}
+
+static int
+write_all(const char *path, const uint8_t *data, size_t size) {
+    int     fd;
+    ssize_t w;
+    size_t  off = 0;
+
+    /* O_NOFOLLOW + 0600: don't follow a symlink at the destination, and don't
+       create the file with the libc default 0666 mode. Same pattern as the
+       net layer's fopen_safe. */
+    fd = open(path, O_WRONLY | O_CREAT | O_TRUNC | O_NOFOLLOW | O_CLOEXEC, 0600);
+    if (fd < 0) return -1;
+    while (off < size) {
+        w = write(fd, data + off, size - off);
+        if (w < 0) {
+            if (errno == EINTR) continue;
+            close(fd);
+            return -1;
+        }
+        off += (size_t)w;
+    }
+    close(fd);
+    return 0;
+}
+
+static int
+file_matches(const char *path, const uint8_t *expected, size_t expected_size) {
+    struct stat st;
+    uint8_t    *buf;
+    int         fd;
+    ssize_t     n;
+    int         match = 0;
+
+    if (stat(path, &st) != 0) return 0;
+    if ((size_t)st.st_size != expected_size) return 0;
+
+    fd = open(path, O_RDONLY | O_CLOEXEC);
+    if (fd < 0) return 0;
+
+    buf = malloc(expected_size);
+    if (!buf) { close(fd); return 0; }
+
+    n = read(fd, buf, expected_size);
+    close(fd);
+    if (n == (ssize_t)expected_size && memcmp(buf, expected, expected_size) == 0)
+        match = 1;
+
+    free(buf);
+    return match;
+}
+
+int
+patchdl_tile_install_if_needed(char *msg, size_t msg_sz) {
+    char base_dir[128];
+    char sce_sys_dir[160];
+    char param_path[192];
+    char icon_path[192];
+    char receipt_path[192];
+
+    ai_init_fn        ai_initialize    = NULL;
+    ai_install_dir_fn ai_install_title = NULL;
+    ai_install_all_fn ai_install_all   = NULL;
+    int               rc;
+
+    snprintf(base_dir,    sizeof base_dir,    "/user/app/%s",                  TILE_TITLE_ID);
+    snprintf(sce_sys_dir, sizeof sce_sys_dir, "/user/app/%s/sce_sys",          TILE_TITLE_ID);
+    snprintf(param_path,  sizeof param_path,  "/user/app/%s/sce_sys/param.json", TILE_TITLE_ID);
+    snprintf(icon_path,   sizeof icon_path,   "/user/app/%s/sce_sys/icon0.png",  TILE_TITLE_ID);
+    /* Written only after the installer accepted the tile. Without it, files
+       left behind by a failed registration would pass the stat-guard below
+       and the tile would never be retried. */
+    snprintf(receipt_path, sizeof receipt_path, "/user/app/%s/.patchdl_registered", TILE_TITLE_ID);
+
+    /* stat-guard: if everything on disk already matches, do nothing. Re-running
+       the install API every payload start would be wasted work and burns the
+       only safe path through Sony's installer state machine. */
+    {
+        struct stat st;
+        if (stat(receipt_path, &st) == 0 &&
+            file_matches(param_path, tile_param_json, tile_param_json_size) &&
+            file_matches(icon_path,  tile_icon0_png,  tile_icon0_png_size)) {
+            snprintf(msg, msg_sz, "tile already installed and up to date");
+            return 0;
+        }
+    }
+
+    /* AppInstUtil is loaded lazily by the install backend thread. Poke it +
+       poll briefly so libSceAppInstUtil.sprx is mapped before we try to
+       resolve symbols out of it. Bounded to a few seconds so a stuck init
+       doesn't wedge an MHD worker forever. */
+    {
+        char    ready_msg[128];
+        int     ready = -1;
+        for (int i = 0; i < 60 && ready != 0; i++) {
+            ready = patchdl_install_backend_check(ready_msg, sizeof ready_msg);
+            if (ready != 0) usleep(250 * 1000);
+        }
+        if (ready != 0) {
+            snprintf(msg, msg_sz,
+                     "install backend not ready: %s", ready_msg);
+            return -1;
+        }
+    }
+
+    /* Resolve the install API now so we can fail fast before touching disk.
+       The symbol export is Sony-private, so the NID resolver is the more
+       reliable lookup — try NID first, fall back to the by-name dlsym. */
+    ai_install_title = (ai_install_dir_fn)dynsym_by_nid("Wudg3Xe3heE");
+    if (!ai_install_title)
+        ai_install_title = (ai_install_dir_fn)dynsym_by_name(
+            "sceAppInstUtilAppInstallTitleDir");
+    /* Firmware 13.xx no longer exports AppInstallTitleDir. AppInstallAll
+       rescans /user/app and registers the tile directory the same way. */
+    if (!ai_install_title)
+        ai_install_all = (ai_install_all_fn)dynsym_by_name(
+            "sceAppInstUtilAppInstallAll");
+    if (!ai_install_title && !ai_install_all) {
+        snprintf(msg, msg_sz,
+                 "neither AppInstallTitleDir nor AppInstallAll resolved");
+        return -1;
+    }
+
+    ai_initialize = (ai_init_fn)dynsym_by_name("sceAppInstUtilInitialize");
+    if (ai_initialize) {
+        rc = ai_initialize();
+        /* SCE_OK == 0; a non-zero rc here usually means "already initialised"
+           in this process, which is fine. We only bail on a clearly fatal
+           code (anything that isn't already the success case). */
+        if (rc != 0 && rc != 0x80B21161 /* ALREADY_INITIALIZED */) {
+            snprintf(msg, msg_sz,
+                     "sceAppInstUtilInitialize failed 0x%08x", (unsigned)rc);
+            return -1;
+        }
+    }
+
+    if (mkdir(base_dir, 0755) && errno != EEXIST) {
+        snprintf(msg, msg_sz, "mkdir %s failed errno=%d", base_dir, errno);
+        return -1;
+    }
+    if (mkdir(sce_sys_dir, 0755) && errno != EEXIST) {
+        snprintf(msg, msg_sz, "mkdir %s failed errno=%d", sce_sys_dir, errno);
+        return -1;
+    }
+
+    unlink(receipt_path);
+    if (write_all(param_path, tile_param_json, tile_param_json_size)) {
+        snprintf(msg, msg_sz, "write param.json failed errno=%d", errno);
+        return -1;
+    }
+    if (write_all(icon_path, tile_icon0_png, tile_icon0_png_size)) {
+        snprintf(msg, msg_sz, "write icon0.png failed errno=%d", errno);
+        return -1;
+    }
+
+    rc = ai_install_title ? ai_install_title(TILE_TITLE_ID, "/user/app/", NULL)
+                          : ai_install_all(NULL);
+    if (rc != 0) {
+        snprintf(msg, msg_sz, "%s(%s) returned 0x%08x",
+                 ai_install_title ? "AppInstallTitleDir" : "AppInstallAll",
+                 TILE_TITLE_ID, (unsigned)rc);
+        return -1;
+    }
+
+    (void)write_all(receipt_path, (const uint8_t *)"1", 1);
+    snprintf(msg, msg_sz, "tile installed (%s via %s)", TILE_TITLE_ID,
+             ai_install_title ? "AppInstallTitleDir" : "AppInstallAll");
+    return 0;
+}

src/patchdl_tile.h

@@ -0,0 +1,29 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later
+ * Copyright (C) 2026 Knutwurst
+ *
+ * PatchDL is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free
+ * Software Foundation, either version 3 of the License, or (at your option)
+ * any later version. See the LICENSE file in the project root for details.
+ */
+
+#pragma once
+
+#include <stddef.h>
+
+/* Install / refresh the PatchDL home-screen tile.
+ *
+ * Writes param.json + icon0.png into /user/app/<TITLE_ID>/sce_sys/ and asks
+ * the on-console installer to register the directory as an app. The tile's
+ * deeplinkUri opens the on-console browser at http://127.0.0.1:12880/, i.e.
+ * PatchDL's own UI — only useful while the ELF is running.
+ *
+ * No package, no code signing — files only; the installer reads the
+ * directory directly.
+ *
+ * stat-guard: the asset bytes are diffed against the on-disk copy first;
+ * if nothing changed the install call isn't made at all (avoids a costly
+ * re-register every payload start). Returns 0 on success or when nothing
+ * needed doing.
+ */
+int patchdl_tile_install_if_needed(char *msg, size_t msg_sz);

src/patchdl_version.h

@@ -1,3 +1,12 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later
+ * Copyright (C) 2026 Knutwurst
+ *
+ * PatchDL is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free
+ * Software Foundation, either version 3 of the License, or (at your option)
+ * any later version. See the LICENSE file in the project root for details.
+ */
+
 #pragma once
 
-#define PATCHDL_VERSION "0.0.3"
+#define PATCHDL_VERSION "0.2.0"

src/patchdl_verxml.c

@@ -1,3 +1,12 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later
+ * Copyright (C) 2026 Knutwurst
+ *
+ * PatchDL is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free
+ * Software Foundation, either version 3 of the License, or (at your option)
+ * any later version. See the LICENSE file in the project root for details.
+ */
+
 #include "patchdl_verxml.h"
 #include "patchdl_net.h"
 
@@ -66,14 +75,20 @@ ver_gt(const char *a, const char *b) {
    from a string such as nptitleid, manifest_url, or delta_url. */
 static void
 extract_title_id(const char *s, char *out, size_t sz) {
+    size_t len;
     out[0] = '\0';
     if (sz < 10 || !s) return;
-    for (const char *p = s; p[0] && p[8]; p++) {
+    len = strlen(s);
+    if (len < 9) return;
+    /* `len - 9` is the last position where a 9-char id can still fit; this
+       avoids reading p[8] past the NUL terminator. */
+    for (size_t i = 0; i <= len - 9; i++) {
+        const char *p = s + i;
         int ok = 1;
-        for (int i = 0; i < 4 && ok; i++)
-            if (p[i] < 'A' || p[i] > 'Z') ok = 0;
-        for (int i = 4; i < 9 && ok; i++)
-            if (p[i] < '0' || p[i] > '9') ok = 0;
+        for (int k = 0; k < 4 && ok; k++)
+            if (p[k] < 'A' || p[k] > 'Z') ok = 0;
+        for (int k = 4; k < 9 && ok; k++)
+            if (p[k] < '0' || p[k] > '9') ok = 0;
         if (ok) {
             memcpy(out, p, 9);
             out[9] = '\0';
@@ -119,20 +134,26 @@ parse_packages(const char *xml, uint32_t fw_bin, patchdl_verinfo_t *out) {
         char murl[512] = {0};
 
         /* PS5 version.xml uses content_ver; PS4 uses version. */
-        if (attr_val(p, tag_end, "content_ver", ver, sizeof(ver)))
+        int is_ps4 = attr_val(p, tag_end, "content_ver", ver, sizeof(ver)) != 0;
+        if (is_ps4)
             attr_val(p, tag_end, "version", ver, sizeof(ver));
         attr_val(p, tag_end, "system_ver", sver, sizeof(sver));
         attr_val(p, tag_end, "delta_url", durl, sizeof(durl));
         attr_val(p, tag_end, "manifest_url", murl, sizeof(murl));
 
-        if (ver[0] && sver[0]) {
-            uint32_t pkg_sver = parse_hex(sver);
+        if (ver[0] && (sver[0] || is_ps4)) {
+            /* A PS4 patch's system_ver is a PS4 firmware (in decimal); the
+               PS5 runs PS4 games regardless, so it never blocks one. */
+            uint32_t pkg_sver = is_ps4 ? 0 : parse_hex(sver);
 
             /* Track latest overall */
             if (!out->latest_version[0] || ver_gt(ver, out->latest_version)) {
                 strncpy(out->latest_version, ver, sizeof(out->latest_version) - 1);
-                fw_bin_to_str(pkg_sver, out->latest_required_fw,
-                              sizeof(out->latest_required_fw));
+                if (is_ps4)
+                    out->latest_required_fw[0] = '\0';
+                else
+                    fw_bin_to_str(pkg_sver, out->latest_required_fw,
+                                  sizeof(out->latest_required_fw));
             }
 
             /* Track latest compatible + its installable patch source. PS5
@@ -148,6 +169,8 @@ parse_packages(const char *xml, uint32_t fw_bin, patchdl_verinfo_t *out) {
                             sizeof(out->compatible_version) - 1);
                     strncpy(out->compatible_url, murl[0] ? murl : durl,
                             sizeof(out->compatible_url) - 1);
+                    if (durl[0])
+                        strncpy(out->delta_url, durl, sizeof(out->delta_url) - 1);
                     extract_title_id(durl, out->compatible_storage_title,
                                      sizeof(out->compatible_storage_title));
                     if (root_title[0]) {
@@ -175,6 +198,10 @@ patchdl_verxml_query(const char *url, uint32_t fw_bin, patchdl_verinfo_t *out) {
     if (!url || !out) return -1;
     memset(out, 0, sizeof(*out));
 
+    /* version.xml is a few KB in practice; cap so a misbehaving CDN can't
+       slurp unbounded RAM into the buffer. */
+    memset(&buf, 0, sizeof(buf));
+    buf.max = 4 * 1024 * 1024;
     if (patchdl_http_get(url, &buf)) return -1;
     if (!buf.data || !buf.size) { free(buf.data); return -1; }
 

src/patchdl_verxml.h

@@ -1,3 +1,12 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later
+ * Copyright (C) 2026 Knutwurst
+ *
+ * PatchDL is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free
+ * Software Foundation, either version 3 of the License, or (at your option)
+ * any later version. See the LICENSE file in the project root for details.
+ */
+
 #pragma once
 
 #include <stdint.h>
@@ -7,6 +16,7 @@ typedef struct {
     char latest_version[16];     /* highest pkg overall, or "" */
     char latest_required_fw[16]; /* fw str for latest pkg, e.g. "11.60", or "" */
     char compatible_url[512];    /* manifest_url if present, otherwise pkg URL */
+    char delta_url[512];         /* DP.pkg bootstrap URL (always a PKG, never JSON) */
     char compatible_title[16];   /* target title id from version.xml/manifest_url */
     char compatible_storage_title[16]; /* title id embedded in delta_url storage path */
 } patchdl_verinfo_t;

src/patchdl_websrv.h

@@ -1,3 +1,12 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later
+ * Copyright (C) 2026 Knutwurst
+ *
+ * PatchDL is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free
+ * Software Foundation, either version 3 of the License, or (at your option)
+ * any later version. See the LICENSE file in the project root for details.
+ */
+
 #pragma once
 
 int patchdl_websrv_start(unsigned short port);

web/README.md

@@ -16,6 +16,9 @@ GET  /api/config
 POST /api/config
 GET  /api/titles
 GET  /api/downloads
+GET  /api/installstatus
+GET  /api/pkgmeta/:title_id
+GET  /api/pkgverify/:title_id
 POST /api/titles/:title_id/check
 POST /api/titles/:title_id/download
 POST /api/titles/:title_id/install
@@ -36,8 +39,9 @@ The UI assumes deny-by-default behavior:
   "source_policy": {
     "official": { "allow_check": true, "allow_download": true, "allow_install": true },
     "external": { "allow_check": true, "allow_download": true, "allow_install": true },
-    "shadowmount": { "allow_check": true, "allow_download": true, "allow_install": false },
-    "unknown": { "allow_check": true, "allow_download": false, "allow_install": false }
+    "shadowmount": { "allow_check": true, "allow_download": false, "allow_install": false },
+    "unknown": { "allow_check": true, "allow_download": false, "allow_install": false },
+    "fake": { "allow_check": true, "allow_download": false, "allow_install": false }
   },
   "cdn_allowlist": [
     "sgst.prod.dl.playstation.net",
@@ -67,7 +71,7 @@ Per-title source fields:
   "source_path": "/system_ex/app/PPSA90001_00",
   "mount_from": "/mnt/usb0/itemzflow/Shadowmounted Test Title",
   "enabled": true,
-  "mode": "download_only"
+  "mode": "disabled"
 }
 ```
 
@@ -80,11 +84,17 @@ shadowmount
 unknown
 ```
 
-The frontend treats `shadowmount` as download-only and `unknown` as blocked for
-downloads and installs. Backend code should enforce the same policy even if a
-client sends a forged request.
+The frontend lists `shadowmount`, `unknown` and `fake` titles under *Not
+supported* and offers neither download nor install for them. The backend refuses
+both as well, even if a client sends a forged request.
 
 For PS5 game updates, the backend may turn a Sony `manifest_url` into a merged
 local `.pkg` by downloading all manifest pieces. The `delta_url` `*-DP.pkg` is
 not shown as a separate user action because it can bootstrap the storage/master
 title instead of the installed regional target.
+
+If `patch_storage_match` is false, the CDN stores the patch pieces under another
+regional (master) title id. That is fine: the merged `.pkg` assembled from the
+manifest carries the installed title's own content id, and AppInstUtil
+`AppInstallPkg` installs it onto that title. The UI only adds a "Shared master"
+label.

web/index.html

@@ -39,7 +39,7 @@
           <div class="brand-mark">PD</div>
           <div>
             <strong>PatchDL</strong>
-            <span>by Knutwurst · v0.0.3</span>
+            <span>by Knutwurst · <span id="brandVersion">--</span></span>
           </div>
         </div>
 
@@ -58,6 +58,7 @@
         <div class="rail-foot">
           <span id="railFw">FW --</span>
           <span id="railSpace">-- free</span>
+          <button type="button" class="link-button rail-donate" data-donate>Buy me a coffee</button>
         </div>
       </aside>
 
@@ -66,16 +67,43 @@
         <section class="view is-active" data-view="games">
           <header class="topbar">
             <div>
-              <p class="eyebrow">Standalone ELF Web UI</p>
+              <p class="eyebrow">PS5 &amp; PS4 game updates</p>
               <h1>Games</h1>
             </div>
             <div class="topbar-actions">
+              <button class="primary-button" id="updateAllBtn" title="Download (and optionally install) every game that has an available, allowed update">
+                <svg><use href="#icon-download"></use></svg>
+                Update all
+              </button>
               <button class="icon-button" id="refreshBtn" title="Refresh status and games" aria-label="Refresh">
                 <svg><use href="#icon-refresh"></use></svg>
               </button>
             </div>
           </header>
 
+          <aside id="globalDl" class="global-dl" hidden aria-live="polite">
+            <div class="global-dl-row">
+              <span class="global-dl-pulse" aria-hidden="true"></span>
+              <div class="global-dl-text">
+                <div class="global-dl-line1">
+                  <span class="global-dl-eyebrow" id="globalDlState">Downloading</span>
+                  <strong class="global-dl-name" id="globalDlName">—</strong>
+                  <span class="global-dl-position" id="globalDlPosition" hidden></span>
+                </div>
+                <div class="global-dl-line2">
+                  <span id="globalDlPct">0%</span>
+                  <span class="global-dl-sep" aria-hidden="true">·</span>
+                  <span id="globalDlSpeed">—</span>
+                  <span class="global-dl-sep" aria-hidden="true">·</span>
+                  <span id="globalDlEta">—</span>
+                </div>
+              </div>
+            </div>
+            <div class="global-dl-track">
+              <i class="global-dl-bar" id="globalDlBar" style="width:0%"></i>
+            </div>
+          </aside>
+
           <section class="status-strip" aria-label="System status">
             <article class="metric">
               <span>Firmware</span>
@@ -85,7 +113,7 @@
             <article class="metric">
               <span>DNS Guard</span>
               <strong id="dnsValue">--</strong>
-              <em>Sony blocked by nanoDNS</em>
+              <em>System DNS left untouched</em>
             </article>
             <article class="metric">
               <span>CDN Access</span>
@@ -105,11 +133,10 @@
               <input id="searchInput" type="search" placeholder="Search title, Title ID, or Content ID" />
             </div>
             <div class="segmented" role="group" aria-label="Filter">
-              <button class="is-selected" data-filter="all" aria-pressed="true">All</button>
-              <button data-filter="updatable" aria-pressed="false">Updatable</button>
-              <button data-filter="uptodate" aria-pressed="false">Up to date</button>
-              <button data-filter="needsfw" aria-pressed="false">Needs FW</button>
-              <button data-filter="blocked" aria-pressed="false">Can't update</button>
+              <button class="is-selected" data-filter="updates" aria-pressed="true">Updates <span class="chip-count"></span></button>
+              <button data-filter="uptodate" aria-pressed="false">Up to date <span class="chip-count"></span></button>
+              <button data-filter="blocked" aria-pressed="false">Not supported <span class="chip-count"></span></button>
+              <button data-filter="all" aria-pressed="false">All <span class="chip-count"></span></button>
             </div>
           </div>
 
@@ -143,7 +170,7 @@
               <label class="field">
                 <span>Download Folder</span>
                 <input id="downloadDir" type="text" spellcheck="false" readonly
-                       title="Patches always download internally and are removed after install" />
+                       title="Patches always download to the console's internal storage" />
               </label>
 
               <label class="switch-row">
@@ -208,6 +235,16 @@
               <span>Install Protection</span>
               <div id="sourcePolicyList"></div>
             </div>
+
+            <div class="storage-list">
+              <span>Downloads on console <em id="storageTotal"></em></span>
+              <div id="storageList"></div>
+            </div>
+
+            <div class="donate-row">
+              <span>Like PatchDL? You can buy me a coffee.</span>
+              <button type="button" class="row-button is-ghost" data-donate>Buy me a coffee</button>
+            </div>
           </div>
         </section>
 

web/styles.css

@@ -116,6 +116,23 @@ svg {
   font-size: 12px;
 }
 .rail-foot span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
+.rail-foot .rail-donate { justify-self: start; margin-top: 4px; }
+
+.donate-row {
+  display: flex;
+  flex-wrap: wrap;
+  align-items: center;
+  justify-content: space-between;
+  gap: 10px;
+  margin-top: 16px;
+  padding: 12px;
+  border: 1px solid var(--border);
+  border-radius: 8px;
+  background: var(--surface-2);
+  color: var(--muted);
+}
+.donate-row .row-button { width: auto; padding: 0 16px; }
+.donate-open { display: inline-flex; align-items: center; justify-content: center; text-decoration: none; justify-self: start; padding: 0 18px; }
 
 /* ---------------- views + topbar ---------------- */
 
@@ -173,6 +190,105 @@ h2 { font-size: 18px; line-height: 1.2; }
   margin-bottom: 18px;
 }
 
+/* ---------------- global download banner ---------------- */
+/* Sticky banner above the status strip, visible only while at least one
+   download is queued/active. The pulse dot and gradient bar at the bottom
+   echo the per-game card progress styling so the two read as one system. */
+.global-dl {
+  position: relative;
+  display: flex;
+  flex-direction: column;
+  gap: 12px;
+  margin-bottom: 18px;
+  padding: 16px 18px 0;
+  border: 1px solid var(--border);
+  background:
+    radial-gradient(120% 80% at 0% 0%, var(--green-soft), transparent 60%),
+    linear-gradient(180deg, rgba(56, 193, 114, 0.06), transparent 60%),
+    var(--surface);
+  border-radius: var(--radius);
+  overflow: hidden;
+}
+
+.global-dl[hidden] { display: none; }
+
+.global-dl-row {
+  display: flex;
+  align-items: center;
+  gap: 14px;
+  min-width: 0;
+}
+
+.global-dl-pulse {
+  flex: none;
+  width: 12px;
+  height: 12px;
+  border-radius: 50%;
+  background: var(--green);
+  box-shadow: 0 0 0 0 var(--green);
+  animation: globalDlPulse 1.6s ease-out infinite;
+}
+
+@keyframes globalDlPulse {
+  0%   { box-shadow: 0 0 0 0 rgba(56, 193, 114, 0.55); }
+  70%  { box-shadow: 0 0 0 14px rgba(56, 193, 114, 0);   }
+  100% { box-shadow: 0 0 0 0 rgba(56, 193, 114, 0);      }
+}
+
+.global-dl-text { display: flex; flex-direction: column; gap: 4px; min-width: 0; flex: 1; }
+
+.global-dl-line1 {
+  display: flex; align-items: baseline; gap: 10px;
+  min-width: 0; flex-wrap: wrap;
+}
+.global-dl-eyebrow {
+  text-transform: uppercase; letter-spacing: 0.08em;
+  font-size: 11px; font-weight: 600; color: var(--green-dark);
+}
+.global-dl-name {
+  font-size: 16px; font-weight: 600; color: #fff;
+  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
+  min-width: 0; flex: 1;
+}
+.global-dl-position {
+  font-size: 12px; color: var(--muted);
+  padding: 2px 8px; border-radius: 999px;
+  background: rgba(255, 255, 255, 0.04); border: 1px solid var(--border);
+}
+.global-dl-position[hidden] { display: none; }
+
+.global-dl-line2 {
+  display: flex; align-items: center; gap: 8px;
+  font-size: 12px; color: var(--muted);
+  font-variant-numeric: tabular-nums;
+}
+.global-dl-line2 b { color: #d6dde4; font-weight: 600; }
+.global-dl-sep { opacity: 0.5; }
+
+.global-dl-track {
+  position: relative;
+  height: 3px;
+  margin: 0 -18px;     /* extend bar edge-to-edge */
+  background: rgba(56, 193, 114, 0.08);
+  overflow: hidden;
+}
+.global-dl-bar {
+  display: block;
+  height: 100%;
+  width: 0%;
+  background: linear-gradient(90deg, var(--green) 0%, var(--green-dark) 100%);
+  box-shadow: 0 0 12px rgba(56, 193, 114, 0.4);
+  transition: width 400ms ease-out;
+}
+.global-dl-bar.is-indeterminate {
+  width: 32% !important;
+  animation: globalDlIndet 1.6s ease-in-out infinite;
+}
+@keyframes globalDlIndet {
+  0%   { transform: translateX(-100%); }
+  100% { transform: translateX(320%);  }
+}
+
 .metric {
   min-width: 0;
   padding: 14px 16px;
@@ -239,6 +355,8 @@ h2 { font-size: 18px; line-height: 1.2; }
   white-space: nowrap;
 }
 .segmented button.is-selected { background: var(--surface); color: var(--ink); }
+.chip-count { margin-left: 4px; color: var(--muted); font-weight: 600; font-variant-numeric: tabular-nums; }
+.chip-count:empty { display: none; }
 
 /* ---------------- game cards ---------------- */
 
@@ -269,13 +387,15 @@ h2 { font-size: 18px; line-height: 1.2; }
 .cover {
   display: grid;
   place-items: center;
-  width: 48px; height: 48px;
+  width: 64px; height: 64px;
   color: #fff;
   background: linear-gradient(135deg, #2d6d9d, #247857);
-  border-radius: 10px;
-  font-size: 14px;
+  border-radius: 12px;
+  font-size: 16px;
   font-weight: 800;
+  overflow: hidden;
 }
+.cover img { width: 100%; height: 100%; object-fit: cover; display: block; }
 
 .card-body { min-width: 0; }
 .card-body h3 { margin: 0 0 6px; overflow-wrap: anywhere; font-size: 16px; }
@@ -292,6 +412,10 @@ h2 { font-size: 18px; line-height: 1.2; }
   color: var(--muted);
 }
 .versions b { color: var(--ink); font-weight: 700; }
+.card-note { flex-basis: 100%; line-height: 1.45; }
+.card-note.is-warn { color: var(--amber); }
+.prospero-line a { color: var(--blue); text-decoration: none; }
+.prospero-line a:hover { text-decoration: underline; }
 
 .card-actions {
   display: flex;
@@ -317,6 +441,7 @@ h2 { font-size: 18px; line-height: 1.2; }
 .pill.warn { border-color: rgba(242, 184, 75, 0.38); background: var(--amber-soft); color: var(--amber); }
 .pill.external { border-color: rgba(88, 166, 255, 0.34); background: var(--blue-soft); color: var(--blue); }
 .pill.shadow { border-color: rgba(181, 146, 255, 0.34); background: rgba(181, 146, 255, 0.14); color: #c7b1ff; }
+.pill.prospero { border-color: rgba(64, 201, 198, 0.38); background: rgba(64, 201, 198, 0.14); color: #6fe0dc; }
 .pill.blocked { border-color: rgba(255, 107, 107, 0.34); background: var(--red-soft); color: var(--red); }
 .pill.live { border-color: rgba(56, 193, 114, 0.5); background: var(--green-soft); color: var(--green-dark); }
 .pill.live::before {
@@ -358,6 +483,17 @@ h2 { font-size: 18px; line-height: 1.2; }
   background: linear-gradient(90deg, var(--green), var(--blue));
   transition: width 320ms ease;
 }
+.progress.is-indeterminate > i {
+  animation: progressSweep 1.6s linear infinite;   /* duration = INDET_MS */
+  transition: none;
+}
+@keyframes progressSweep {
+  from { transform: translateX(-100%); }
+  to   { transform: translateX(320%); }
+}
+@media (prefers-reduced-motion: reduce) {
+  .progress.is-indeterminate > i { animation: none; width: 100% !important; opacity: 0.5; }
+}
 .progress-meta {
   display: flex;
   flex-wrap: wrap;
@@ -451,8 +587,39 @@ h2 { font-size: 18px; line-height: 1.2; }
 .toggle input:checked + .track::after { transform: translateX(18px); background: var(--green); }
 .toggle input:focus-visible + .track { outline: 2px solid var(--blue); outline-offset: 2px; }
 .toggle .label { font-size: 12px; color: var(--muted); min-width: 22px; }
+.lead .toggle .label { white-space: nowrap; }
 
-.allowlist, .source-policy { display: grid; gap: 8px; margin-top: 16px; }
+.allowlist, .source-policy, .storage-list { display: grid; gap: 8px; margin-top: 16px; }
+.storage-list > span em { color: var(--muted); font-style: normal; margin-left: 6px; }
+.storage-list > div { display: grid; gap: 8px; }
+.storage-row {
+  display: grid;
+  grid-template-columns: minmax(0, 1fr) auto auto auto;
+  gap: 10px;
+  align-items: center;
+  padding: 10px;
+  background: var(--surface-2);
+  border: 1px solid var(--border);
+  border-radius: 8px;
+}
+.storage-row strong { font-size: 13px; overflow-wrap: anywhere; }
+.storage-row em { color: var(--muted); font-style: normal; font-size: 12px; }
+.storage-row b { font-variant-numeric: tabular-nums; }
+.storage-empty { color: var(--muted); font-size: 13px; }
+.link-button {
+  padding: 0;
+  border: 0;
+  background: none;
+  color: var(--blue);
+  font: inherit;
+  cursor: pointer;
+  text-decoration: underline;
+  text-underline-offset: 2px;
+}
+.link-button:hover { color: var(--ink); }
+@media (max-width: 640px) {
+  .storage-row { grid-template-columns: minmax(0, 1fr) auto; }
+}
 .allowlist div { display: flex; flex-wrap: wrap; gap: 6px; }
 .source-policy > div { display: grid; gap: 8px; }
 
@@ -528,8 +695,138 @@ pre {
 }
 .toast.is-visible { opacity: 1; transform: translate(-50%, 0); }
 
+/* ---------------- older patch guide (Prospero) ---------------- */
+
+.guide-backdrop {
+  position: fixed;
+  inset: 0;
+  z-index: 15;               /* below the toast (20) */
+  display: grid;
+  grid-template-columns: minmax(0, 560px);   /* an auto track would grow to the content */
+  justify-content: center;
+  align-content: center;
+  padding: 24px 16px;
+  overflow-y: auto;
+  background: rgba(5, 7, 9, 0.72);
+}
+.guide {
+  display: grid;
+  gap: 16px;
+  padding: 22px;
+  border: 1px solid var(--border);
+  border-radius: 14px;
+  background: var(--surface);
+  box-shadow: var(--shadow);
+}
+/* minmax(0, 1fr): without it an <input>'s intrinsic width pushes the tracks wider than the sheet */
+.guide, .guide-steps, .guide-steps li { grid-template-columns: minmax(0, 1fr); }
+.guide-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; }
+.guide-head > div { min-width: 0; }
+.guide-head h2 { margin: 0; font-size: 22px; }
+.guide-game { margin: 4px 0 0; color: var(--muted); }
+.guide-close { flex: none; width: 40px; padding: 0; font-size: 22px; line-height: 1; }
+.guide-why { margin: 0; color: var(--muted); line-height: 1.55; }
+.guide-why b { color: var(--ink); }
+
+.guide-qr {
+  display: flex;
+  align-items: center;
+  gap: 16px;
+  padding: 14px;
+  border: 1px solid var(--border);
+  border-radius: var(--radius);
+  background: var(--surface-2);
+}
+.guide-qr .qr { flex: none; width: 148px; height: 148px; border-radius: 6px; }
+.guide-qr > div { display: grid; gap: 6px; min-width: 0; }
+.guide-qr span { color: var(--muted); line-height: 1.5; }
+.guide-qr code { overflow-wrap: anywhere; color: var(--blue-dark); font-size: 13px; }
+
+/* Console view: the PS5 can't copy links, so it only hands over to a phone. */
+.guide.is-handoff { width: min(560px, 100%); justify-self: center; text-align: center; }
+.guide.is-handoff .guide-head { text-align: left; }
+.guide-handoff { display: grid; justify-items: center; gap: 12px; }
+.guide-handoff .qr { width: min(420px, 100%); height: auto; aspect-ratio: 1; border-radius: 8px; }
+.guide-handoff p { margin: 0; color: var(--muted); line-height: 1.5; }
+.guide-handoff code { overflow-wrap: anywhere; color: var(--blue-dark); font-size: 16px; }
+
+.guide-steps { display: grid; gap: 12px; margin: 0; padding: 0; list-style: none; counter-reset: step; }
+.guide-steps li {
+  display: grid;
+  gap: 10px;
+  padding: 14px 14px 14px 52px;
+  position: relative;
+  border: 1px solid var(--border);
+  border-radius: var(--radius);
+  counter-increment: step;
+}
+.guide-steps li::before {
+  content: counter(step);
+  position: absolute;
+  left: 14px;
+  top: 14px;
+  width: 26px;
+  height: 26px;
+  display: grid;
+  place-items: center;
+  border-radius: 50%;
+  background: var(--green-soft);
+  color: var(--green-dark);
+  font-weight: 800;
+  font-size: 13px;
+}
+.guide-step-text { display: grid; gap: 4px; }
+.guide-step-text span { color: var(--muted); line-height: 1.5; }
+.guide-step-text b { color: var(--ink); }
+.guide-open { width: auto; justify-self: start; padding: 0 18px; text-decoration: none; }
+
+.guide-paste { display: flex; gap: 8px; }
+.guide-input {
+  flex: 1;
+  min-width: 0;
+  width: 100%;
+  height: 44px;
+  padding: 0 12px;
+  border: 1px solid var(--border);
+  border-radius: 8px;
+  background: var(--bg);
+  color: var(--ink);
+  font-size: 16px;           /* below 16px iOS zooms the page on focus */
+}
+.guide-input::placeholder { color: var(--muted); }
+.guide-input:focus { outline: none; border-color: var(--blue); }
+.guide-start { width: auto; flex: none; min-height: 44px; padding: 0 18px; }
+
+.guide-status:empty { display: none; }
+.guide-status { display: grid; gap: 8px; }
+.guide-msg { margin: 0; line-height: 1.5; }
+.guide-msg.is-idle, .guide-msg.is-busy { color: var(--muted); }
+.guide-msg.is-ok { color: var(--green-dark); }
+.guide-msg.is-warn { color: var(--amber-dark); }
+.guide-msg.is-error { color: var(--red); }
+.guide-action { width: auto; justify-self: start; padding: 0 16px; }
+.guide-progress { display: grid; gap: 6px; margin-top: 8px; color: var(--muted); font-size: 13px; }
+
+@media (max-width: 720px) {
+  /* Already on a phone: the hand-off QR has nothing to add. */
+  .guide-qr { display: none; }
+  .guide-backdrop { align-content: start; padding: 12px; }
+  .guide { padding: 16px; }
+}
+
 /* ---------------- responsive ---------------- */
 
+/* Wide screens (desktop, PS5 browser): bigger covers so a card doesn't look
+   empty. */
+@media (min-width: 900px) {
+  .game-card { padding: 18px 20px; }
+  .cover { width: 104px; height: 104px; border-radius: 14px; font-size: 22px; }
+  .card-row { gap: 20px; }
+  .card-body h3 { font-size: 19px; margin-bottom: 8px; }
+  .subline { font-size: 13px; }
+  .versions { font-size: 13px; }
+}
+
 @media (max-width: 1024px) {
   .app-shell { grid-template-columns: 1fr; }
   .rail {