From de6cd8d9f1cb62f34f6a597f9578ecd0d11e9f3a Mon Sep 17 00:00:00 2001
From: Alexandre Beloin <alexandre.beloin@gmail.com>
Date: Sun, 8 Feb 2015 20:01:30 -0500
Subject: [PATCH] Added detection of fs unsupported link creation. Function
 acquire will run in infinite loop if the fs doesn't support link
 creation(OSError: (38, 'Function not implemented'))

---
 lib/lockfile/linklockfile.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/lockfile/linklockfile.py b/lib/lockfile/linklockfile.py
index 9c506734..d407848c 100644
--- a/lib/lockfile/linklockfile.py
+++ b/lib/lockfile/linklockfile.py
@@ -28,7 +28,9 @@ class LinkLockFile(LockBase):
             # Try and create a hard link to it.
             try:
                 os.link(self.unique_name, self.lock_file)
-            except OSError:
+            except OSError as e:
+                if e.errno == 38:
+                    raise LockFailed("%s" % e.strerror)
                 # Link creation failed.  Maybe we've double-locked?
                 nlinks = os.stat(self.unique_name).st_nlink
                 if nlinks == 2: