Move the SingletonSocket to a temporary directory

This is to workaround problems on certain network filesystems (notably AFS)
which do not support Unix domain sockets. We move the sockets into a temporary
folder and symlink. To avoid the possibility of a dangling link to a missing
(and later intercepted) remote directory, we create and check cookie files
and rely on the stickiness of /tmp/ to avoid a race condition in the check.

R=mattm
BUG=44606
TEST=ProcessSingletonLinuxTest.*

Review URL: http://codereview.chromium.org/2838034

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@57623 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 9 insertions, 0 deletions

diff --git a/chrome/browser/process_singleton.h b/chrome/browser/process_singleton.h
index 19e40a6..57dd446 100644
--- a/chrome/browser/process_singleton.h
+++ b/chrome/browser/process_singleton.h
@@ -20,6 +20,9 @@
 #include "base/non_thread_safe.h"
 #include "base/ref_counted.h"
 #include "gfx/native_widget_types.h"
+#if defined(USE_X11)
+#include "base/scoped_temp_dir.h"
+#endif
 
 class CommandLine;
 class FilePath;
@@ -139,6 +142,12 @@ class ProcessSingleton : public NonThreadSafe {
   // Path in file system to the lock.
   FilePath lock_path_;
 
+  // Path in file system to the cookie file.
+  FilePath cookie_path_;
+
+  // Temporary directory to hold the socket.
+  ScopedTempDir socket_dir_;
+
   // Helper class for linux specific messages.  LinuxWatcher is ref counted
   // because it posts messages between threads.
   class LinuxWatcher;