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