Merge pull request #278 from phire/pid_self

Filesystem HLE: Intercept /proc/${getpid}/exe too

External/FEXCore/Source/Interface/HLE/FileManagement.cpp

@@ -19,6 +19,15 @@ namespace FEXCore {
 FileManager::FileManager(FEXCore::Context::Context *ctx)
   : CTX {ctx}
   , EmuFD {ctx} {
+
+    // calculate the non-self link to exe
+    // Some executables do getpid, stat("/proc/$pid/exe")
+    int pid = getpid();
+
+    char buf[50];
+    snprintf(buf, 50, "/proc/%i/exe", pid);
+
+    PidSelfPath = std::string(buf);
 }
 
 FileManager::~FileManager() {
@@ -85,7 +94,7 @@ uint64_t FileManager::FAccessat(int dirfd, const char *pathname, int mode, int f
 }
 
 uint64_t FileManager::Readlink(const char *pathname, char *buf, size_t bufsiz) {
-  if (strcmp(pathname, "/proc/self/exe") == 0) {
+  if (strcmp(pathname, "/proc/self/exe") == 0 || strcmp(pathname, PidSelfPath.c_str()) == 0) {
     strncpy(buf, Filename.c_str(), bufsiz);
     return std::min(bufsiz, Filename.size());
   }

External/FEXCore/Source/Interface/HLE/FileManagement.h

@@ -49,6 +49,7 @@ private:
 
   std::unordered_map<int32_t, std::string> FDToNameMap;
   std::string Filename;
+  std::string PidSelfPath;
   std::string GetEmulatedPath(const char *pathname);
 };
 }