shell 脚本监控 php进程 screen 发送信号

#!/bin/sh
source~/.bash_profile
ps -ef |grep xx.php|grep -v 'grep' |grep -v"log"

if [$? -eq 0]
then
{
pid=$(echo $(ps -ef |grep xx.php|grep -v grep)|awk '{print $2}')
}
else
{
sleep 20
screen -r tpc -p 0 -X stuff "php -f xx.php"
screen -r tpc -p 0 -X stuff $'\n'

}