Comments on: bash script to check if a process instance is running

By: Menda

Menda — Fri, 19 Dec 2008 23:51:29 +0000

This one is the best:

if [ "$(pidof processname)" ] ; then
echo ‘Process is running…’
fi

By: Pavan

Pavan — Thu, 14 Aug 2008 03:40:14 +0000

pgrep utility can also be used to achieve the above mentioned task;
pgrep examines the active processes on the system and reports the process IDs of the processes.

eg.
run_count=`pgrep ${process} | wc -l`
OR more succinctly
run_count=`pgrep ${process} -c`

By: VowFoeloferop

VowFoeloferop — Sun, 03 Aug 2008 08:30:27 +0000

I agreed with you

By: Pavan

Pavan — Wed, 23 Jul 2008 16:25:37 +0000

@Pernod,
Thanks for pointing out, I updated my post.
For those who are curious about ’shebang’, visit http://en.wikipedia.org/wiki/Shebang_(Unix)“

By: Pernod

Pernod — Wed, 23 Jul 2008 15:49:33 +0000

You may want to correct the shebang as well – remove the blank like in
#!/bin/bash

By: Pavan

Pavan — Wed, 09 Jul 2008 18:11:23 +0000

@Vinod
Thanks for the correction. I had tested this script under Cygwin and it worked just fine. However I incorporated the correction suggested by you and it should work consistently across *NIX.

By: Vinod

Vinod — Wed, 09 Jul 2008 10:55:17 +0000

did you test this script ?
you have to use
ps eax | grep ${process} | grep -v grep | wc -l
if you dont want to count the grep command!