守护进程shell脚本

#! /bin/bash

PROGRAM="main"

while true; do
   sleep 1
   PRO_NOW=`ps aux | grep $PROGRAM | grep -v grep| wc -l`

   if [ $PRO_NOW -lt 1 ]; then
      ./$PROGRAM 2>/dev/null 1>&2 &
      date >>./tinfo.log
      echo "test start" >> ./tinfo.log
   fi

   PRO_STAT=`ps aux |grep $PROGRAM |grep T|grep -v grep|wc -l`

   if [ $PRO_STAT -gt 0 ]; then
      pkill -9 $PROGRAM
      sleep 1
      ./$PROGRAM 2>/dev/null 1>&2 &
      date >>./tinfo.log
      echo "test restart" >> ./tinfo.log
   fi

done