719654 - Detect previous start-up failure (symlink fallback case)

Status: NEW

(Toolkit :: Startup and Profile System, enhancement)

Description

[Matthew N. [:MattN]]

See bug 294260 comment 41:
> * This doesn't detect startup crashes if the profile is using symlinks (rather 
> than fcntl) as the primary locking mechanism.  This is because replacedLockTime 
> requires that the existing lock is still on disk but not unlinking the symlink 
> would cause profile locked messages.  A possible workaround is to change the 
> symlink during an expected shutdown so that it is detected as stale on next 
> startup.  My understanding is that only a small proportion of users will be 
> relying on symlinks since the fallback is for old NFS servers that don't support 
> fcntl.