[plug] results in variable

[Bernard Blackham]

On Sun, Aug 24, 2003 at 09:41:23PM +0800, Craig Ringer wrote:
> 'killall -0 postfix' and testing the exit value should work. A signal 
> zero should be ignored by the application - it's just used to see if you 
> /can/ send a signal.

There's also the pidof program. Something like:

pidof qmgr > /dev/null

will just return 0 if it finds a process, and 1 otherwise.

HTH,

Bernard.

-- 
 Bernard Blackham 
 bernard at blackham dot com dot au