Determine which process owns an flock'ed file

Question

I have a Bash script that runs in multiple processess concurrently. The relevant portion looks like this:

flock /var/lock/my_lock my_command

Given that /var/lock/my_lock exists, is there a way to determine which process owns it and thus which one is executing my_command?

`fuser /var/lock/my_lock` ? – leonbloy May 16 '13 at 19:56 — leonbloy, May 16 '13 at 19:56

score 2 · Answer 1 · answered Dec 29 '18 at 19:47

2

fuser -v /var/lock/mylock will display the user, process ID, access and command. I found this page to be helpful in understanding fuser.

answered Dec 29 '18 at 19:47

Nathan

score 1 · Accepted Answer · answered May 16 '13 at 19:54

1

Something like lsof | "egrep /var/lock/my_lock" should work

answered May 16 '13 at 19:54

Cry Havok

2

That's cracking a nut with a sledgehammer. `fuser` is the tool to be used. – Hauke Laging May 16 '13 at 19:58
2

It's not necessary to use `grep`, `lsof` will accept the filename as an argument. – Dennis Williamson May 17 '13 at 00:06
fuser and lsof report all processes trying to adquire the lock, doesn't say which is actually running my_command – quimnuss Oct 19 '17 at 09:27

2 Answers2