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 #!/bin/sh

 #

 # This Source Code Form is subject to the terms of the Mozilla Public

 # License, v. 2.0. If a copy of the MPL was not distributed with this

 # file, You can obtain one at http://mozilla.org/MPL/2.0/.

 # Treats the arguments as a command that is to be forked and observed;

 # e.g.,

 #

 #   watch.sh ./mozilla -f bloaturls.txt

 #

 # Periodically snap-shots the virtual memory info of the process, and

 # dumps the output to ``watch.out''

 # Clear the output file

 OUTPUT_FILE=watch.out

 INTERVAL=10

 while [ $# -gt 0 ]; do

     case "$1" in

     -o) OUTPUT_FILE=$2

         shift 2

         ;;

     -i) INTERVAL=$2

         shift 2

         ;;

     *)  break

         ;;

     esac

 done

 rm -f ${OUTPUT_FILE}

 echo "vmsize vmexe vmlib vmdata vmstk vmrss" > ${OUTPUT_FILE}

 # treat the arguments as the command to execute

 $* &

 # remember the process ID

 PID=$!

 while [ -e /proc/${PID} ]; do

     cat /proc/${PID}/status |\

     awk '$1=="VmSize:" { vmsize = $2; }

 $1=="VmData:" { vmdata = $2; }

 $1=="VmStk:" { vmstk = $2; }

 $1=="VmExe:" { vmexe = $2; }

 $1=="VmLib:" { vmlib = $2; }

 $1=="VmRSS:" { vmrss = $2; }

 END { print vmsize, vmexe, vmlib, vmdata, vmstk, vmrss; }' >> ${OUTPUT_FILE}

     sleep ${INTERVAL}

 done