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Full Discussion: Perl script to kill the process ID of a command after a certain period
Top Forums Shell Programming and Scripting Perl script to kill the process ID of a command after a certain period Post 302375445 by Pouchie1 on Friday 27th of November 2009 07:05:48 PM
Old 11-27-2009
Perl script to kill the process ID of a command after a certain period
All,

I am trying to build a script in perl that will alllow me to pass the IP address to a ping command and redirect the output to a file and then kill that process after a certain period of time.

let's say, I call my script ping.pl, I would like to be able to run it like this for example : ./ping.pl 127.0.0.1 60 (where 127.0.0.1 will be the ip address I want to run the ping command on and 60 will be the period is seconds I would like the ping command to run and kill process ID for this ping command after this period).

I started out like this, but it looks like when I enter the command ./ping.pl 127.0.0.1 60. Nothing never happens. When I type in the IP, hit enter and type 60, hit enter. It starts working. It creates the file, but it never stops running. The process has never been killed. Any help will be appreciated.

I would like to be able to run the script on one line command with the arguments like ./ping.pl 127.0.0.1 60 ( it could be any IP and any time).

Thanks,

#!/usr/bin/perl
$i = <STDIN>;
$j = <STDIN>;
system("ping $i > ping.pl.txt");
system("sleep $j");
system("kill -9 `ps aux |grep ping|awk '{ print $2 }' ");
 

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LEARN ABOUT OSX

kill.d

kill.d(1m)							   USER COMMANDS							kill.d(1m)

NAME

       kill.d - snoop process signals as they occur. Uses DTrace.

SYNOPSIS

       kill.d

DESCRIPTION

       kill.d is a simple DTrace program to print details of process signals as they are sent, such as the PID source and destination, signal num-
       ber and result.

       This program can be used to determine which process is sending signals to which other process.

       Since this uses DTrace, only users with root privileges can run this command.

EXAMPLES

       Default output, print process signals as they are sent.
	      # kill.d

FIELDS

       FROM   source PID

       COMMAND
	      source command name

       TO     destination PID

       SIG    destination signal ("9" for a kill -9)

       RESULT result of signal (-1 is for failure)

DOCUMENTATION

       See the DTraceToolkit for further documentation under the Docs directory. The DTraceToolkit docs may include full worked examples with ver-
       bose descriptions explaining the output.

EXIT

       kill.d will run forever until Ctrl-C is hit.

AUTHOR

       Brendan Gregg [Sydney, Australia]

SEE ALSO

       dtrace(1M), truss(1)

version 0.90							   May 14, 2005 							kill.d(1m)
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