Cron Tab problem


 
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# 1  
Old 07-29-2005
Cron Tab problem

I have a script that is being called from cron job .
This script further call 3 scripts which runs in the background .

main script ( called from cron )
{
script1 &
script2 &
script3 &
}

How to know when the main script is over ??
# 2  
Old 07-29-2005
You can use wait for background processes.

Look at this post and this one as well.

Vino
# 3  
Old 07-29-2005
Great Help !!

Thanks a lot Vino
# 4  
Old 08-01-2005
Vino has already mentioned one possibility. Another one would be: find out the PIDs of the background processes and set up a while-loop which scans the process table for these PIDs. Find an example below for one such process:

Code:
#! /bin/ksh
# This script is called from cron

typeset -i iPID=0

script1 &

iPID=$( ps -fe |\
        grep "script1" |\
        grep -v grep |\
        sed 's/<space><space>*/<space>/g' |\
        cut -d' ' -f2
      )

while : ; do
     if [ -n $( ps -fe  | grep "$iPID" | grep -v grep ) ] ; then
          sleep 5
     else
          print - "Job $iPID has terminated."
          exit 0
     fi
done

 
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