Question

杀死BASH的孩子看起来很容易。但我的脚本让孩子在UNIX传送带内。而这种标准技术不起作用。

我有像这样的BASH脚本

ls -1 | { while read line ; do 
                python -c 'while 1: pass' &
          done ; }
while : ; do sleep 1 ; done

父进程应等待Ctrl + C或其他信号停止所有后台子进程做无限循环。

有问题：

jobs -p  # print nothing so trap hook cannot kill anybody

其次是花括号内定义的陷阱根本不被调用。在这种情况下，无限循环也在括号内。

我有一个最后的解决方案来放置来自$的pids！进入tmp文件但是对我来说看起来很麻烦。

尝试2

我已经使用下面的新建议重写了代码，但仍然没有成功。

#!/bin/bash                                                                                                                                        

echo "my pid is $$"
exit_func() {
    echo "pid in exit $(echo $$)"
    echo "ps $(ps --no-headers --ppid $$ -o pid)"
    echo "pgrep $(pgrep -P $$)"
    echo "pstree $(pstree -p $$)"
}

trap 'exit_func' EXIT

ls -1 / | {
    while read a ; do
        python -c 'while 1: pass' &
        echo -n " $!"
    done
}

while : ; do : ; done

Util ps，pgrep和pstree都看不到python孩子。

[dan@localhost]$ ./testtrap.sh 
my pid is 17848
 17851 17852 17853 17854 17855 17856 17857 17858 17859 17860 17861 17862 17863 17864 17865 17866 17867 17868 17869 17870 17871 17872 17873  C-c C-\
cpid in exit 17848
ps 17875
pgrep 17877
pstree testtrap.sh(17848)---testtrap.sh(17879)---pstree(17880)

[dan@localhost]$ ps 
  PID TTY          TIME CMD
17851 pts/2    00:00:12 python
17852 pts/2    00:00:12 python
17853 pts/2    00:00:12 python
17854 pts/2    00:00:12 python
17855 pts/2    00:00:12 python
17856 pts/2    00:00:14 python
17857 pts/2    00:00:12 python
17858 pts/2    00:00:15 python
17859 pts/2    00:00:12 python
17860 pts/2    00:00:12 python
17861 pts/2    00:00:15 python
17862 pts/2    00:00:12 python
17863 pts/2    00:00:12 python
17864 pts/2    00:00:12 python
17865 pts/2    00:00:12 python
17866 pts/2    00:00:14 python
17867 pts/2    00:00:12 python
17868 pts/2    00:00:12 python
17869 pts/2    00:00:12 python
17870 pts/2    00:00:15 python
17871 pts/2    00:00:12 python
17872 pts/2    00:00:12 python
17873 pts/2    00:00:12 python
17959 pts/2    00:00:00 ps
27560 pts/2    00:00:00 bash
[dan@localhost]$

如何杀死孙子进程

尝试2

0 个答案: