守护进程模板

守护进程模板
#!/usr/bin/env bash
command_str=" 要求守护的进程"
while true
do
    nohup $command_str &
    child_pid="$!"
    echo "sub pid: " $child_pid
    while true
    do
        if kill -0 $child_pid
        then
            echo "$command_str is alive"
            sleep 1
        else
            echo "$command_str is dead"
            echo "***********************************">>err_log.log
            break
        fi
    done
done