ps returning more process ids

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# 1  
Old 10-11-2013
ps returning more process ids

Please help me with this question

I have a under /home/mydir which is a caller to another script "" under /home/anotherdir

echo "caller script
exit 0

echo "actual script"
 ps -ef |grep | grep -v grep|awk '{print $2}'

 for PID in `ps -ef | grep "" | grep -v "grep" |awk '{print $2}'`
                        echo $PID

This always echos 3 PIDs and not two. My requirement is to see, that if there are two or more process initiated, then exit. Only one must be there at any time, parellel processing is not supported.

I was thinking to go this way, if there is any other process other than the currentPID and parent PID, then exit, but since the ps command returns three PIDs, I am not able to get a solution, please advice.

Last edited by Franklin52; 10-11-2013 at 04:04 AM.. Reason: Please use code tags
# 2  
Old 10-11-2013
Is the script detecting itself as a running process?
# 3  
Old 10-11-2013
What are you trying to achieve ?
Why are you using 2 scripts instead of just 1 ?
# 4  
Old 10-11-2013
I only get two PIDs outputted, so something else is going on.

What is the full output of:
# ps -ef | grep | grep -v grep

# 5  
Old 10-11-2013
Just to save the last "grep -v grep" pipe ...
# ps -ef | grep [t]

# 6  
Old 10-12-2013
Or just use this to get the pid

# 7  
Old 10-12-2013
ps -ef | grep -w "tantan\.sh" | grep -vw "$$" | grep -vw "grep"

Last edited by MadeInGermany; 10-12-2013 at 06:30 AM..
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