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Capture unexpected exit in shell script

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# 1  
Old 02-24-2010
Capture unexpected exit in shell script
Hi,

I have shell script that checks processes forever.
But somehow it is killed and I want to know what causes it.

while [ true ]
do
check the processes if they are running, if not restart them
done

I want to capture the output when the script is terminated, how can I do that?

/Andreas
# 2  
Old 02-24-2010
Code:
#/bin/sh
while true; do
    count=`ps aux |grep "your process" | grep -v "grep"`
    if [ "$?" != "0" ]; then
        do something
    else
        do something
    fi
done

Last edited by Franklin52; 02-24-2010 at 10:41 AM.. Reason: Reformatting indentation
# 3  
Old 02-24-2010
Here is very cpu friendly process. Sleep in wait cmd until child process get some signal.
Code:
#!/bin/someposixsh
outf=/tmp/$0.$$.tmp"
echo "$0 PID:$$ started $(date '+%Y%m%d %H%M%S')" >> $outf
while true 
do
     subprocess >> $outf 2>&1    &
     subpid=$!
     echo "Started ChildPid:$subpid"  
     wait $subpid
     echo "$0 PID:$$ child $subpid has problem $(date '+%Y%m%d %H%M%S')"  >> $outf
     echo "child has got some signal" >> $outf  
done

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