exit if another instance is running

if [ `fuser $0|wc -w` -gt "1" ];then exit; fi
runs only one instance.

By: yooreck
2009-11-20 16:22:30

1 Alternatives + Submit Alt

What Others Think

Hmmm... cute, but I doubt fuser is guaranteed to work atomically. Might as well use pidof since it doesn't require wc and is obviously wrong (instead of subtly wrong like this one is).
hackerb9 · 559 weeks and 2 days ago
I agree with @hackerb9, but if you have to use this then try this version: [ `fuser $0|wc -w` -gt "1" ] && exit 1
denzuko · 558 weeks and 6 days ago

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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