3.shell脚本编程之语句控制
# cat testservice.sh#!/bin/bash
#
#chkconfig: - 50 50
#description: test service scipt
#
prong=$(basename $0)
lockfile=/var/lock/subsys/$prong
case $1 in
start)
if [ -f $lockfile ];then
echo "$prong is running yet."
else
touch $lockfile
[ $? -eq 0 ] && echo "start $prong finished."
fi
;;
stop)
if [ -f $lockfile ];then
rm -f $lockfile
[ $? -eq 0 ] && echo "stop $prong finished."
else
echo "$prong is not running."
fi
;;
restart)
if [ -f $lockfile ];then
rm -f $lockfile
echo "stop $prong finished."
touch $lockfile
echo "start $prong finished."
else
touch $lockfile
echo "start $prong finished."
fi
;;
status)
if [ -f $lockfile ];then
echo "$prong is running"
else
echo "$prong is stopped"
fi
;;
*)
echo "Usage: $prong {start|stop|restart|status}"
exit 1
esac
#================================================================================
# 复制到 /etc/init.d/ 目录下：
# cp testservice /etc/init.d/
# ls /etc/init.d/
functionsnetconsolenetworkREADMEtestservice.sh
# 加入到 SysV 服务中去，使用 service 命令管控
# chkconfig --add testservice
# chkconfig --list testservice
注意：该输出结果只显示 SysV 服务，并不包含原生 systemd 服务。SysV 配置数据可能被原生 systemd 配置覆盖。
如果您想列出 systemd 服务,请执行 'systemctl list-unit-files'。
欲查看对特定 target 启用的服务请执行
'systemctl list-dependencies '。
testservice 0:关1:关2:关3:关4:关5:关6:关
# ll /etc/init.d/testservice
-rw-r--r-- 1 root root 798 3月 2 13:42 /etc/init.d/testservice
# 给脚本一个执行权限
# chmod +x /etc/init.d/testservice
# 服务脚本测试如下
# service testservice start
start testservice finished.
# service testservice start
testservice is running yet.
# service testservice restart
stop testservice finished.
start testservice finished.
# service testservice stop
stop testservice finished.
# service testservice restart
start testservice finished.
# service testservice res
Usage: testservice {start|stop|restart|status}
# ls /var/lock/subsys/
networktestservice
# service testservice stop
stop testservice finished.
# 注意：通过服务控制的脚本都会在启动完成后在 /var/lock/subsys/ 下创建一个锁文件
# service testservice stop
stop testservice finished.
# ls /var/lock/subsys/
network
# service testservice status
testservice is stopped
# service testservice start
start testservice finished.
# ls /var/lock/subsys/
networktestservice
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