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zombie_kill.sh
<![CDATA[
#
# This script will run from cron at midnight, Monday through
# Sunday, and kill the parents of zombie processes with a sig
# 9. The parent process of a zombie must have a parent process
# id of 1. Once a zombie's parent is killed the zombie will make
# like a tree and leave. Following conditions must be met before
# a sig 9 kill is issued.
#
# owner cannot be root
# tty field must be equal to ??
# program field must be equal to <defunct>
# parent process id of zombie's parent must be equal to 1
#
# If ANY of the above conditions are not met, then the process
# will be considered valid.
B=/bin
C=cut
E=echo
G=grep
GE=egrep
S=sleep
LOG=/usr/local/log/zombie_procs_log
LOG2=/usr/local/log/zombie_procs_history_log
TMP=/tmp/zombie_procs
TMP2=/tmp/zombie_parent
dat=`date`
OS=`uname`
if [ "$OS" = "HP-UX" ]; then
UNIX95=true
export UNIX95
fi
export B C E G GE S LOG LOG2 TMP TMP2 dat
$B/cp /dev/null $TMP2
$B/ps -eo user,pid,ppid,tty,comm | $B/$G -v root | $B/$G defunct > $TMP
$B/cat $TMP | while read UNAME PID PPID TTY CMD
do
if [ "$TTY" = ?? ] && [ "$CMD" = "<defunct>" ]
then
$B/ps -fu $UNAME >> $TMP2
PARENT=`$B/ps -fu $UNAME | $B/$G $PPID | $B/$G -v $PID | $B/$C -c21-23`
if [ "$PARENT" = " 1 " ]
then
$B/kill -9 $PPID
$B/$S 5
$B/ps -fu $UNAME | $B/$G $PID
if [ "$?" -eq 0 ]
then
$B/$E "Parent process ($PPID) of zombie $PID, belonging to $UNAME, could not be killed on $dat" >> $LOG
else
$B/$E "Parent process ($PPID) of zombie $PID, belonging to $UNAME, was killed with sig 9 on $dat" >> $LOG
fi
fi
fi
done
$B/$E " \n******************* $dat *******************\n " >> $LOG2
$B/cat $TMP >> $LOG2
$B/cat $TMP2 >> $LOG2
#
# End of zombie_kill script
#
#### END OF SCRIPT
]]>
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