#!/bin/bash
#
# So something to show.
echo "UNO" > UNO.txt
echo "DOS" > DOS.txt
#
# Initialize Pid List
dPidLst=""
#
# Generate background processes
tail -f UNO.txt&
dPidLst="$dPidLst $!"
tail -f DOS.txt&
dPidLst="$dPidLst $!"
#
# Report process IDs
echo PID=$$
echo dPidLst=$dPidLst
#
# Show process on current shell
ps -f
#
# Start killing background processes from list
for dPid in $dPidLst
do
echo killing $dPid. Process is still there.
ps | grep $dPid
kill $dPid
ps | grep $dPid
echo Just ran "'"ps"'" command, $dPid must not show again.
done
然后运行它: ./bgkill.sh 当然具有适当的权限
root@umsstd22 [P]:~# ./bgkill.sh
PID=23757
dPidLst= 23758 23759
UNO
DOS
UID PID PPID C STIME TTY TIME CMD
root 3937 3935 0 11:07 pts/5 00:00:00 -bash
root 23757 3937 0 11:55 pts/5 00:00:00 /bin/bash ./bgkill.sh
root 23758 23757 0 11:55 pts/5 00:00:00 tail -f UNO.txt
root 23759 23757 0 11:55 pts/5 00:00:00 tail -f DOS.txt
root 23760 23757 0 11:55 pts/5 00:00:00 ps -f
killing 23758. Process is still there.
23758 pts/5 00:00:00 tail
./bgkill.sh: line 24: 23758 Terminated tail -f UNO.txt
Just ran 'ps' command, 23758 must not show again.
killing 23759. Process is still there.
23759 pts/5 00:00:00 tail
./bgkill.sh: line 24: 23759 Terminated tail -f DOS.txt
Just ran 'ps' command, 23759 must not show again.
root@umsstd22 [P]:~# ps -f
UID PID PPID C STIME TTY TIME CMD
root 3937 3935 0 11:07 pts/5 00:00:00 -bash
root 24200 3937 0 11:56 pts/5 00:00:00 ps -f
7 回答
您需要在启动时保存后台进程的PID:
您无法使用作业控制,因为这是一个交互式功能并且与控制终端绑定 . 脚本根本不需要连接终端,因此不一定可以使用作业控制 .
您也可以使用pstree:
这通常给出“user”的所有进程的文本表示,-p选项给出process-id . 据我所知,它不依赖于当前shell拥有进程 . 它还显示叉子 .
$$
是当前脚本的pid$!
是最后一个后台进程的pid这是来自bash会话的示例脚本(
%1
指的是从jobs
看到的后台进程的序号):pgrep
可以获取父进程的所有子PID . 如前所述$$
是当前的脚本PID . 所以,如果你想要一个可以自行清理的脚本,这应该可以解决问题:您可以使用
jobs -l
命令转到特定的jobL在这种情况下,46841是PID .
从
help jobs
:jobs -p
是另一个仅显示PID的选项 .杀死bash脚本的所有子进程的更简单方法:
-P
标志与pkill
和pgrep
的工作方式相同 - 它获取子进程,只有pkill
子进程被杀死,并且pgrep
子PID被打印到stdout .这就是我所做的 . 看看,希望它可以帮助 .
然后运行它:
./bgkill.sh
当然具有适当的权限