Re: flock on Ubuntu 9.10

You are using flock(FH, LOCK_EX) which will wait until the lock is available. Easy to see if you put a print before and after the flock.

Add the non-blocking flag to get an instantaneous read on the lock state: flock(FH, LOCK_EX|LOCK_NB). Import the constants with use Fcntl qw(:flock);.

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Re^2: flock on Ubuntu 9.10 by poctob (Initiate) on Nov 14, 2009 at 03:09 UTC
What can I say you and ikegami hit the nail right on the head. Adding non-blocking flag did the trick. The only thing I would like to add, so not really related to my original post, is that if Proc::Daemon::Init is used to daemonize the process, flock call has to be after Proc::Daemon::Init call, otherwise Proc::Daemon::Init releases the lock as it forks the app. Thank you!	[reply]
Re^3: flock on Ubuntu 9.10 by ikegami (Patriarch) on Nov 14, 2009 at 07:14 UTC
Part of daemonizing involves forking and exiting the current process. Proc::Deamon uses `exit` to exit the current process. This closes open file handles, releasing associated locks.	[reply] [d/l]