问题描述
在bash脚本中，我按以下方式处理不同的信号:
In bash script I handle different signal as follows:
#!/bin/bash
sighdl ()
{
echo "signal caught"
#do something
exit 0
}
trap sighdl SIGKILL SIGINT SIGTERM
以上代码正确处理了以下活动:
Above code handle signal properly for following activity:
- +
-
kill pid -
pkill脚本名称
- +
kill pidpkill scriptname
对于 kill -9 pid ，它不会调用 sighdl .根据我的理解(如果我没记错的话)， kill -9 发送SIGKILL信号.
For kill -9 pid it does not call sighdl. As per my understanding (if I am not wrong) kill -9 sends the SIGKILL signal.
有什么主意吗?
推荐答案
您不能这样做.是9是 SIGKILL ，由于安全原因，Unix系统设计上不允许任何脚本/程序捕获 SIGKILL .否则，任何脚本都会捕获&忽略SIGKILL，这将使OS无法终止该脚本.
You cannot do that. Yes 9 is SIGKILL and Unix system by design doesn't allow any script/program to trap SIGKILL due to security reasons. Otherwise any script can trap & ignore SIGKILL which will make impossible to terminate that script by OS.
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