[SOLVED] How to terminate while loop.

satishchahar · 03-30-2012, 03:31 AM

Hi

I started a while loop directly from terminal to read a file line by line and to run a command on each line. Post running the command I realized to modify the command and tried to stop the loop by using CTRL+C but it didn't stop. I closed that terminal directly but loop is still running. I also tried to KILL the process but it is getting started automatically with a new PID. Please suggest to stop this loop.

Thanks.

acid_kewpie · 03-30-2012, 03:37 AM

kill the parent process, probably a bash shell.

catkin · 03-30-2012, 03:51 AM

How did you start the while loop?

satishchahar · 03-30-2012, 03:54 AM

What I did is I searched the PID for the command running on each line and killed the same. Please suggest, how to kill parent process.

satishchahar · 03-30-2012, 03:55 AM

while read line
do
ldapsearch $line
done < filename

catkin · 03-30-2012, 03:57 AM

pstree -p will show the parents with their PIDs

colucix · 03-30-2012, 03:58 AM

Use the pstree command to find the parent process, e.g.

Code:

pstree -p username

specifying your username to reduce the output.

Edit: Beaten by catkin for a bunch of seconds!

Hi Charles!

catkin · 03-30-2012, 03:59 AM

Quote:

Originally Posted by satishchahar

while read line
do
ldapsearch $line
done < filename

It's not obvious why that doesn't respond to multiple Ctrl+C signals, unless the ldapsearch command is programmed to ignore SIGINT.

EDIT: and doesn't exit

colucix · 03-30-2012, 04:00 AM

Quote:

Originally Posted by satishchahar

while read line
do
ldapsearch $line
done < filename

Have you tried to rename or move filename?

catkin · 03-30-2012, 04:01 AM

Quote:

Originally Posted by colucix

Edit: Beaten by catkin for a bunch of seconds!

Hi Charles!

Hi colucix

We keep doing that, one way round or the other

satishchahar · 03-30-2012, 04:06 AM

Hi colucix

I killed the parent process but process is still running with a new parent ID.
Also tried to move the filename.

catkin · 03-30-2012, 04:08 AM

Try killing the parent's parent

satishchahar · 03-30-2012, 04:30 AM

Killing the parent process, didn't help.

catkin · 03-30-2012, 05:11 AM

Assuming you are not logged on as root, try killing the parent's parent and, if that doesn't work, the parent's parent's parent

AnanthaP · 03-30-2012, 07:48 AM

Quote:

.. terminal to read a file line by line and to run a command on each line. P ..

Also

Quote:

I also tried to KILL the process but it is getting started automatically with a new PID

Could we see the culprit script?

If it is not a live system, then shutdown -h now or shutdown -g0
`

OK.