bash script to check if a process instance is running
#!/bin/bash
if [ $# -ne 2 ]
then
echo "$0 process_name instances_count"
exit 1
fi
function count_match {
echo Count Match #Your code goes here
}
function count_mismatch {
echo Count Mismatch #Your code goes here
}
process=$1
exp_count=$2
run_count=`ps eax | grep ${process} | grep -v grep | wc -l`
if [ ${exp_count} -eq ${run_count} ]
then
count_match
else
count_mismatch
fi
Please note “grep -v grep” is not be required for cygwin, but even if you retain it, it doesn’t alter the behavior.
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!
@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.
You may want to correct the shebang as well – remove the blank like in
#!/bin/bash
@Pernod,
Thanks for pointing out, I updated my post.
For those who are curious about ’shebang’, visit http://en.wikipedia.org/wiki/Shebang_(Unix)“
I agreed with you
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 ${process} -c`
This one is the best:
if [ "$(pidof processname)" ] ; then
echo ‘Process is running…’
fi