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# 1  
Old 11-02-2012
Sleep while i > 0
Hi,
I have a script that runs a process at the beginning and I want to sleep/wait until this process is finished and then continue with the rest of the script. I am trying with this, but it is not working:
Code:
process=`ps -ef | grep "proc_p01 -c" | grep -v grep | wc -l`
if [ $process -gt 0 ]; do
  sleep 10
done

Actually, it never ends. Can you help me, please?
# 2  
Old 11-02-2012
How do you start the process in the first place? Like proc_p01 -c &?

If so, then just use wait in your script. It's meant for this task.
This User Gave Thanks to hergp For This Post:
apenkov
# 3  
Old 11-02-2012
how do you run the process ? is it a script called in your script ?

use wait
Code:
 
 
#!/bin/bash
 
/call/one/script.sh
wait
echo "End"

End will print after the script.sh is fully completed.
# 4  
Old 11-02-2012
You call your thread Sleep while i > 0 and then use if [ $process -gt 0 ]; ?
Anyhow, if you run your process in the background using the & metachar, you can wait for it to finish and then continue the script. If you are using some other technique, place the ps | grep in the while test like
Code:
 while  ps|grep [9]029 ; do sleep 10; done

# 5  
Old 11-02-2012
Just a little example

Code:
sleep 20 &
p1=$!
echo "$p1 running"
sleep 15 &
p2=$!
echo "$p2 running"
sleep 10 &
p3=$!
echo "$p3 running"
sleep 5 &
p4=$!
echo "$p4 running"

date
wait $p1 $p2 $p3 $p4
date
echo "All sleep process are finished"

# 6  
Old 11-02-2012
Quote:
Originally Posted by RudiC
If you are using some other technique, place the ps | grep in the while test like
Code:
 while  ps|grep [9]029 ; do sleep 10; done

If that's intended to check for the existence of a process with pid 9029, it would be simpler to just use:
Code:
while ps -p 9029 >/dev/null; do
...
done

Regards,
Alister
# 7  
Old 11-02-2012
Quote:
Originally Posted by hergp
How do you start the process in the first place? Like proc_p01 -c &?

If so, then just use wait in your script. It's meant for this task.
Yes, I start it like that and 'wait' is perfect!
Thanks!
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