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multiple child scripts running in backgroud, how to use grep on the parent?

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# 1  
Old 08-01-2008
multiple child scripts running in backgroud, how to use grep on the parent?
Hi

I have a shell script A which calls another 10 shell scripts which run in background. How do i make the parent script wait for the child scripts complete, or in other words, i must be able to do a grep of parent script to find out if the child scripts are still running.

My Code:

nohup a.sh > /dev/null 2>&1


Code in a.sh:

nohup b.sh > /opt/portal/6.5/apps/b.txt &
nohup c.sh > /opt/portal/6.5/apps/c.txt &
nohup d.sh > /opt/portal/6.5/apps/d.txt &
nohup e.sh > /opt/portal/6.5/apps/e.txt &
nohup f.sh > /opt/portal/6.5/apps/f.txt &
nohup g.sh > /opt/portal/6.5/apps/g.txt &


i try to grep:
ps -ef|grep a.sh|grep -v grep

I must be able to do this successfully...

Kindly help..

Regards,
Albert
# 2  
Old 08-01-2008
Use the shell's wait command.
# 3  
Old 08-01-2008
is it possible to run the main script in background as well? while it waits for the child scripts to complete..
# 4  
Old 08-02-2008
Yes, absolutely. In fact I would suggest you take out the nohup for the child processes and run the main script with nohup instead.
# 5  
Old 08-02-2008
you may want to use while statement..
value=`ps -ef | egrep '(a|b|c|d|e|f).sh'
while [ ! -z "${value}" ]
do
echo child scripts are still running
done

HTH
# 6  
Old 08-02-2008
try this, at the end of the parent script

value=`ps -ef | egrep '(a|b|c|d|e|f).sh'`
while [ ! -z "${value}" ]
do
echo child scripts are still running
done
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