脚本自动添加crontab示例

脚本自动添加crontab

#!/bin/sh 
BASEDIR=`dirname $0`/.. 
BASEDIR=`(cd "$BASEDIR"; pwd)` 
PROGRAM=$BASEDIR/bin/daemon.sh 
CRONTAB_CMD="*/1 * * * * sh $PROGRAM once > /dev/null 2>&1 &" 
(crontab -l 2>/dev/null | grep -Fv $PROGRAM; echo "$CRONTAB_CMD") | crontab - 
COUNT=`crontab -l | grep $PROGRAM | grep -v "grep"|wc -l ` 
if [ $COUNT -lt 1 ]; then 
        echo "fail to add crontab $PROGRAM" 
        exit 1 
fi