kill the process invoked from a shell script, when the script is killed

kskkumar · 05-23-2007, 06:11 AM

I have one shell script, through which i am invoking a process (e.g. the shell script conatins only one line, wish). When i kill the shell script from some other shell, Only the shell script is killd but the process invoked by the shell script is not killed. I want the process also to be killed. Can some one help me

Okie · 05-23-2007, 06:37 AM

there are couple of methods to do this, if you know the name of the running command you can kill it with the killall command, or use a tool like top to kill it, with top running press the k on your keyboard and then type in the pid number & press enter...

kskkumar · 05-23-2007, 06:51 AM

The top's k and process ID also kills only the shell but not the process invoked by it.

killall -9 <pid of the script> is not working.

Okie · 05-23-2007, 07:04 AM

reboot, unless you have a life threatening need to keep that PC running...

jschiwal · 05-23-2007, 07:04 AM

If you use killall, use the name of the script instead of the pid. Or use kill with the pid.

theYinYeti · 05-23-2007, 07:17 AM

Maybe something like this:

Code:

#!/bin/bash
child=
function killChild() {
  [ -n "$child" ] && kill $child
}
trap killChild 2 15
/path/to/your/single/command &
child=$!
wait $child

Yves.

kskkumar · 05-23-2007, 08:01 AM

Thanks U so much using the shell scripting, i can kill all the process. But -9 signal cannot be captured

- i think that is a limitation.

theYinYeti · 05-23-2007, 10:46 AM

Sure. However -9 is hardly a standard use of kill. Except in rare situations, you should use kill without -9.

Yves.

Indiestory · 05-23-2007, 11:29 AM

you can't catch the kill -9 signal , i think its the only one. I learnt some stuff about process's today and i'm going to recommend beej's IPC guide for more information
http://beej.us/guide/bgipc/