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Full Discussion: Killing processes in scripts
Top Forums Shell Programming and Scripting Killing processes in scripts Post 24596 by el_toro on Monday 15th of July 2002 01:47:04 PM
Old 07-15-2002
Killing processes in scripts
I have a small problem. It's annoying though. I wrote this shell script:
Code:
#
# This script will accept two arguments. The first is a flag and the
# second is a time interval. The only valid flag is '-t' which means
# the user will specify the interval in seconds, otherwise the 
# default is 600 seconds. While the interval is counting, the script
# will run the ps command, cut out the process numbers, and
# place them in a temp file. When the interval is met the script 
# calls another script which uses the temp file and outputs
# the current time, the number of users logged on, and the
# number of processes run during the interval. It will continually
# loop until the script is killed by ^Z.

while [ 1 -eq 1 ]; do

  if test {$1}

  then if [ "$1" = "-t" ]
          then sleep $2; sh colfile &
                let timec=0
                  while [ timec -le $2 ]
                  do
                    ps | cut -f2 -d" " >> proc.tmp
                    let timec=timec+1
                    sleep 1
                  done
           else exit
       fi

  else sleep 5; sh colfile &
       let timec=0
          while [ timec -le 600 ]
          do
            ps | cut -f2 -d" " >> proc.tmp
            let timec=timec+1
            sleep 1
          done
  fi

done

My problem is that when I run it most of the time it will create multiple instances of itself and I have to individually kill each process. I don't know if it is because I don't have an end to the program and have to press ^Z to stop the program or what it is.

When I typed the command:
Code:
sh collect -t 2

After stopping it I did a ps and got this:
Code:
   PID    TTY  TIME CMD
 29372  pts/4  0:00 sh collect -t 2
 33282  pts/4  0:01 -ksh
 37414  pts/4  0:00 ps
 41604  pts/4  0:00 sh collect -t 2
 46194  pts/4  0:00 sh collect -t 2

Notice the 3 instances it created? Does anyone know why it is doing that and how I can stop it or kill the processes right in my script?

Thanks
Last edited by Yogesh Sawant; 06-23-2009 at 04:07 AM.. Reason: added code tags
 

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LEARN ABOUT BSD

pts_sleep

PTS_SLEEP(1)						       AFS Command Reference						      PTS_SLEEP(1)

NAME

       pts_sleep - Pauses for a few seconds

SYNOPSIS

       pts sleep [-delay] <# of seconds>
	  [-cell] <cell name> [-noauth] [-localauth] [-force]

       pts sl [-d] <# of seconds> [-c] <cell name>
	  [-n] [-l] [-f]

DESCRIPTION

       The pts sleep pauses for a specified number of seconds. The command can be run from the command line or interactively, although from the
       command line it's essentially equivalent to the sleep command. It is intended for use in interactive mode to pause for a few seconds
       between batch commands to allow the Protection Server to catch up.

CAUTIONS

       Prior to OpenAFS 1.4.5 and OpenAFS 1.5.23, the pts sleep command was only available on Unix or Linux and when OpenAFS was compiled with the
       supergroups option (disabled by default).  As of OpenAFS 1.4.5 and 1.5.23, it is always available.

OPTIONS

       Although they have no effect, pts sleep takes the following standard pts options:

       -cell <cell name>
	   Names the cell in which to run the command. For more details, see pts(1).

       -force
	   Enables the command to continue executing as far as possible when errors or other problems occur, rather than halting execution at the
	   first error.

       -help
	   Prints the online help for this command. All other valid options are ignored.

       -localauth
	   Constructs a server ticket using a key from the local /etc/openafs/server/KeyFile file. Do not combine this flag with the -cell or
	   -noauth options. For more details, see pts(1).

       -noauth
	   Assigns the unprivileged identity anonymous to the issuer. For more details, see pts(1).

OUTPUT

       This command produces no output.

EXAMPLES

       Here is an example of a pts interactive session:

	  % pts interactive
	  pts> sleep 5
	  pts> quit
	  %

SEE ALSO

       pts(1), pts_interactive(1)

COPYRIGHT

       Copyright 2007 Jason Edgecombe <jason@rampaginggeek.com>

       This documentation is covered by the BSD License as written in the doc/LICENSE file. This man page was written by Jason Edgecombe for
       OpenAFS.

OpenAFS 							    2014-04-08							      PTS_SLEEP(1)
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