I want to write a Perl code that ends the process of another program of mine, running on Linux.
For example, I execute xxy.py and a process is opened for it. I would like to use Perl to close the process of xxy.py. What do I need to do?
views:
250answers:
3
A:
use killall to kill processes by process names. if you have to use perl. do a system call from within there.
neal aise
2010-06-27 23:43:32
could anyone explain the negatives here?
neal aise
2010-06-28 08:46:49
Not a downvoter, but perhaps it's because only the FreeBSD-style `killall` cares about the name given. SysV-style `killall` is much more literal and will attempt to kill **all** processes. (Or, given that this is SO, they could just be random drive-by downvotes...)
Dave Sherohman
2010-06-28 10:45:35
thanks Dave. you figure right. i come from a freebsd background. din't know killall doesnt work the same. would definitely try killall if i get to a linux system. sounds a crazy function.the good news is that someone had sympathy to my downvotes :)
neal aise
2010-06-28 18:48:07
+3
A:
Perl extensions are typically .pl or .pm right? .py is for python I think.
Anyway, you can kill a specified program in a Unix environment with something like:
system 'killall', 'some_program_name';
or
system 'kill', '-15', $pid;
if the variable $pid holds the pid of your program.
KLee1
2010-06-28 00:43:38
A better way to write that is `system 'kill', '-9', $pid;`. That will avoid going through a shell
friedo
2010-06-28 02:18:48
Additionally, you should probably avoid using `-9` (`SIGKILL`) as it doesn't give the process you're killing any chance to clean itself up. `SIGTERM` (usually `-15`) is better.
friedo
2010-06-28 02:21:15
You're right. I will edit my post to reflect this. I was just used to having to kill unresponsive programs with 9.
KLee1
2010-06-28 03:00:41