Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Killing a process from perl script.
Top Forums Shell Programming and Scripting Killing a process from perl script. Post 49423 by Optimus_P on Thursday 1st of April 2004 11:10:06 AM
Old 04-01-2004
try to avoid all the exec calls to the shell. they will take a toll on your perl program.


This is a snipit from Learning Perl
section 14.7. Sending and Receiving Signals

Code:
[328]Sending a signal will also fail if you're not the superuser and it's someone else's process. It would be rude to send SIGINT to someone else's programs, anyway.

unless (kill 0, $pid) {
  warn "$pid has gone away!";
}

altho i dont kill a remote process i do kill my local process like so.
i know there are other modules out there to handle what i am trying to do but this seems to work for now.

Code:
...
...
if (-f "/tmp/ftp_out.pid") {
open (PIDFILE, "/tmp/ftp_out.pid");
chomp(my $PID=<PIDFILE>);
if (grep /$PID/, `ps -p $PID`) { close (PIDFILE); die "$0 is already running.\n"
; };
unlink "/tmp/ftp_out.pid";
}
...
...

 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

killing process using a script

can I do ps -ef | grep <process_name> and kill the process is it exists? and send a mail to me that the process was found and killed Thanks much... KS (4 Replies)
Discussion started by: skotapal
4 Replies

2. AIX

killing a process from a script

Hey all. I'm brand new to this forum and am looking for some help. I have a script that verifies that the backup tapes are working correctly. Basically is uses 1 command: restore -xpqvf > rootvglog I use this for each volume group that we have. We run this everyday but the problem is, we... (4 Replies)
Discussion started by: jalge2
4 Replies

3. Shell Programming and Scripting

While killing the process, Script gets hanged. Please help me on this.

Hi Everyone, I have written a script to automate the docbase cleanup process on every weekly basis. That is in this script i have to shutdown the docbase and then kill all the process that are hanged except one process(epic process) and need to delete some log files and then i have to start the... (8 Replies)
Discussion started by: Sheethal
8 Replies

4. Shell Programming and Scripting

script not killing process!

i am using script to connect remotly to server and run some commands , one of these commands is to kill some process but tried different ways with no hope sshpass -p 'pass' ssh -o StrictHostKeyChecking=no server kill -9 `pgrep procs` getting error message "kill: bad argument count" ... (2 Replies)
Discussion started by: mogabr
2 Replies

5. Shell Programming and Scripting

Killing a process within 5 min it starts in Unix using perl

Hi All, I have to kill a program whose pid, i will be getting. Multiple processes will be getting started by my script of same kind in a series. So for after each call to a process i need to write a command or script which can kill the process if it takes more than 5min. In this i will... (3 Replies)
Discussion started by: nishank.jain
3 Replies

6. Shell Programming and Scripting

**need help for killing a process through script**

Hello All, i hope you are fine. I need a little help from you people-- inside a script i want to kill a parent process by checking it with the child process.. p_pid=`ps -e | awk '/ra_cmd_d/ {print$1}'` here i am selecting the child process id in p_pid. next-- sleep_pid=`ps -af |... (3 Replies)
Discussion started by: onlyniladri
3 Replies

7. Homework & Coursework Questions

Unix Script -- To Skip killing a specific process

Hi, By using ps -aux | awk '/mine/{split($15,a,"/");print $1,$2,a}' i get the below listed PID's with there corresponding processes. adm 1522 ABC_Process.tra adm 1939 GENE_Process.tra adm 2729 GENE_Archive.tra adm 3259 xyz_Process.tra I use ps -aux | awk... (5 Replies)
Discussion started by: murali1687
5 Replies

8. Shell Programming and Scripting

Killing a bash process and running the second part of script

I want to run a script that calls remote ssh and if it gets hung, I want to be able to kill that part of the script and run another command in the script for example I have a statement like this: if ]; then export tapes=$(for tape in $(su - nacct -c 'ssh remote1 "cat... (1 Reply)
Discussion started by: newbie2010
1 Replies

9. Shell Programming and Scripting

Automated Script for Process killing

Hello all, I'm in need of a Script which needs to wait for all the child process to end and then kill the main process. I have a process called mainpp which runs for different instances like evpn, nge, gmn etc so when i query for mainpp process it looks like below. bash-3.2$ ps -eaf |... (6 Replies)
Discussion started by: Mahesh_RPM
6 Replies

10. Shell Programming and Scripting

Killing the process if running for long time in script

I am running a script which will read the data from fail line by line and call the Java program by providing the arguments from the each line. The Java code is working fast for few records and for some records its getting hanged not providing response for morethan one hour. Currently am... (4 Replies)
Discussion started by: dineshaila
4 Replies

LEARN ABOUT X11R4

kill

KILL(1)                                                            User Commands                                                           KILL(1)

NAME

       kill - send a signal to a process

SYNOPSIS

       kill [options] <pid> [...]

DESCRIPTION

       The  default  signal  for kill is TERM.  Use -l or -L to list available signals.  Particularly useful signals include HUP, INT, KILL, STOP,
       CONT, and 0.  Alternate signals may be specified in three ways: -9, -SIGKILL or -KILL.  Negative PID values may be  used  to  choose  whole
       process  groups;  see  the  PGID  column  in ps command output.  A PID of -1 is special; it indicates all processes except the kill process
       itself and init.

OPTIONS

       <pid> [...]
              Send signal to every <pid> listed.

       -<signal>
       -s <signal>
       --signal <signal>
              Specify the signal to be sent.  The signal can be specified by using name or number.  The behavior of signals is explained  in  sig-
              nal(7) manual page.

       -l, --list [signal]
              List signal names.  This option has optional argument, which will convert signal number to signal name, or other way round.

       -L, --table
              List signal names in a nice table.

       NOTES  Your shell (command line interpreter) may have a built-in kill command.  You may need to run the command described here as /bin/kill
              to solve the conflict.

EXAMPLES

       kill -9 -1
              Kill all processes you can kill.

       kill -l 11
              Translate number 11 into a signal name.

       kill -L
              List the available signal choices in a nice table.

       kill 123 543 2341 3453
              Send the default signal, SIGTERM, to all those processes.

SEE ALSO

       kill(2), killall(1), nice(1), pkill(1), renice(1), signal(7), skill(1)

STANDARDS

       This command meets appropriate standards. The -L flag is Linux-specific.

AUTHOR

       Albert Cahalan <albert@users.sf.net> wrote kill in 1999 to replace a bsdutils one that was not standards  compliant.   The  util-linux  one
       might also work correctly.

REPORTING BUGS

       Please send bug reports to <procps@freelists.org>

procps-ng                                                          October 2011                                                            KILL(1)
All times are GMT -4. The time now is 08:20 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy