On usage of check_procs

[Ralph.Grothe at itdz-berlin.de]

Hello,

I have a little question regarding the usage of check_procs.

Somehow I feel the usage of check_procs could well be overkill
because I only want to monitor if a certain single process (that
doesn't fork) is still running.

I know that writing a minimal "plug-in" for this purpose would be
rediculously simple, like

e.g. it wouldn't need much more than these two shell lines
(n.b. platform being hpux, that's why the setting of env UNIX95
here, which might look odd to you):



set -- $(UNIX95= ps -o pid= -o ppid= -C cron)
( if [[ $2 -eq 1 ]] && kill -0 $1; then rc=0; echo OK; else rc=2;
echo CRITICAL; fi; return $rc )
OK
0



Nevertheless I'd like to use the ready made check_procs.

But I'm unsure about the correct usage of the ranges type of
arguments for the options -w and -c.

Since either the process to monitor is running (which would be
OK),
or otherwise is not running (which would be CRITICLA),
it doesn't make much sense to me to specify ranges (of numbers of
processes)

I thought I could use the check_procs for my purpose in such a
(silly?) manner.
Would that be one possible way how to check a single process for
existence in the proc table?
(well, if it was an un-wait-ed for child it could well be a
zombie, so maybe a more sophisticated state check too was
necessary?)



# id
uid=0(root) gid=3(sys)
# sleep 1000 &
[1]     24590
# /usr/local/nagios/libexec/check_procs -m PROCS -w 1:1 -c 1:1 -p
$$ -u 0 -C sleep
PROCS OK: 1 process with PPID = 23629, UID = 0 (root), command
name 'sleep'
# echo $?
0
# kill %1
# /usr/local/nagios/libexec/check_procs -m PROCS -w 1:1 -c 1:1 -p
$$ -u 0 -C sleep
PROCS CRITICAL: 0 processes with PPID = 23629, UID = 0 (root),
command name 'sleep'
[1] + Terminated               sleep 1000 &
# echo $?
2



Regards 
Ralph


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