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Full Discussion: Passing a variable to kill command
Top Forums Shell Programming and Scripting Passing a variable to kill command Post 302701809 by sjmolloy on Monday 17th of September 2012 10:55:26 AM
Old 09-17-2012
Passing a variable to kill command
I have a script that kicks off several processes in the background and stored their pids in a variable as follows:
Code:
PID_DUMP_TRAN=$PID_DUMP_TRAN" "$!

so I then have a list of pids
If I echo $PID_DUMP_TRAN I get back a list of pids e.g. 8210 8211 8212

However I then want to kill all these processes at the end of the script. I have tried:
kill $PID_DUMP_TRAN
kill `echo $PID_DUMP_TRAN `
and kill `echo "$PID_DUMP_TRAN"`

I know this is me mis-understanding how to use the variable rather than the kill command and its a fairly basic misunderstanding at that but can anybody point me in the right direction,
I just keep getting an error saying the Arguments must be jobs or PIDS!!!
Last edited by Corona688; 09-17-2012 at 12:27 PM..
 

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LEARN ABOUT BSD

pidof

PIDOF(8)						Linux System Administrator's Manual						  PIDOF(8)

NAME

       pidof -- find the process ID of a running program.

SYNOPSIS

       pidof [-s] [-c] [-n] [-x] [-o omitpid[,omitpid..]]  [-o omitpid[,omitpid..]..]  program [program..]

DESCRIPTION

       Pidof  finds  the  process  id's (pids) of the named programs. It prints those id's on the standard output. This program is on some systems
       used in run-level change scripts, especially when the system has a System-V like rc structure. In that case these scripts  are  located	in
       /etc/rc?.d, where ? is the runlevel. If the system has a start-stop-daemon (8) program that should be used instead.

OPTIONS

       -s     Single shot - this instructs the program to only return one pid.

       -c     Only  return  process ids that are running with the same root directory.	This option is ignored for non-root users, as they will be
	      unable to check the current root directory of processes they do not own.

       -n     Avoid stat(2) system function call on all binaries which are located on network based file systems like NFS.  Instead of using  this
	      option the the variable PIDOF_NETFS may be set and exported.

       -x     Scripts too - this causes the program to also return process id's of shells running the named scripts.

       -o omitpid
	      Tells  pidof  to omit processes with that process id. The special pid %PPID can be used to name the parent process of the pidof pro-
	      gram, in other words the calling shell or shell script.

EXIT STATUS

       0      At least one program was found with the requested name.

       1      No program was found with the requested name.

NOTES

       pidof is actually the same program as killall5; the program behaves according to the name under which it is called.

       When pidof is invoked with a full pathname to the program it should find the pid of, it is reasonably safe. Otherwise it is  possible  that
       it  returns  pids  of  running programs that happen to have the same name as the program you're after but are actually other programs. Note
       that that the executable name of running processes is calculated with readlink(2), so symbolic links to executables will also match.

SEE ALSO

       shutdown(8), init(8), halt(8), reboot(8), killall5(8)

AUTHOR

       Miquel van Smoorenburg, miquels@cistron.nl

								    01 Sep 1998 							  PIDOF(8)
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