Mercurial > hg-stable

changeset 19868:0532c8f8e911

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cmdutil.service: move pidfile writing to the parent in daemon mode There is a potential race here, which I suspect I've spotted in the wild, where something reads the pid file after the parent exits but before the child has had a chance to write to it. Moving writing the file to the parent causes this to no longer be an issue.
author Siddharth Agarwal <sid0@fb.com>
date Wed, 02 Oct 2013 15:20:49 -0700
parents edce20ebe1f3
children 4210a05c4329
files mercurial/cmdutil.py
diffstat 1 files changed, 3 insertions(+), 1 deletions(-) [+]
line wrap: on
line diff
--- a/mercurial/cmdutil.py	Wed Oct 02 15:17:50 2013 -0700
+++ b/mercurial/cmdutil.py	Wed Oct 02 15:20:49 2013 -0700
@@ -497,6 +497,7 @@
             pid = util.rundetached(runargs, condfn)
             if pid < 0:
                 raise util.Abort(_('child process failed to start'))
+            writepid(pid)
         finally:
             try:
                 os.unlink(lockpath)
@@ -511,7 +512,8 @@
     if initfn:
         initfn()
 
-    writepid(os.getpid())
+    if not opts['daemon']:
+        writepid(os.getpid())
 
     if opts['daemon_pipefds']:
         lockpath = opts['daemon_pipefds']