Function UnmountRootFS

Source/Tools/FEXServer/SquashFS.cpp:191–228

}

void UnmountRootFS() {
  FEX_CONFIG_OPT(LDPath, ROOTFS);
  if (!FEX::FormatCheck::IsSquashFS(LDPath()) && !FEX::FormatCheck::IsEroFS(LDPath())) {
    return;
  }

  SquashFS::ShutdownImagePID();

  // Handle final mount removal
  // fusermount for unmounting the mountpoint, then the {erfsfuse, squashfuse} will exit automatically
  int pid = fork();

  if (pid == 0) {
    const char* argv[5];
    argv[0] = "fusermount";
    argv[1] = "-u";
    argv[2] = "-q";
    argv[3] = MountFolder.c_str();
    argv[4] = nullptr;

    if (execvp(argv[0], (char* const*)argv) == -1) {
      fprintf(stderr, "fusermount failed to execute. You may have an mount living at '%s' to clean up now\n", MountFolder.c_str());
      fprintf(stderr, "Try `%s %s %s %s`\n", argv[0], argv[1], argv[2], argv[3]);
      exit(1);
    }
  } else {
    // Wait for fusermount to leave
    while (waitpid(pid, nullptr, 0) == -1 && errno == EINTR)
      ;

    // Remove the mount path
    rmdir(MountFolder.c_str());

    // Remove the rootfs lock file
    auto RootFSLockFile = FEXServerClient::GetServerRootFSLockFile();
    unlink(RootFSLockFile.c_str());
  }
}

bool InitializeSquashFS() {
  FEX_CONFIG_OPT(LDPath, ROOTFS);