退出函数时的 Bash 陷阱
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Bash trap on exit from function
提问by bercik
Is there possible in bash to call some command when function exits. I mean something like:
当函数退出时，bash 是否可以调用一些命令。我的意思是这样的：
function foo
{
# something like this maybe?
trap "echo \"exit function foo\"" EXIT
# do something
}
foo
And i want exit function foo to be printed out.
我想打印出退出函数 foo 。
回答by Aaron
Yes, you can trap RETURN:
是的，您可以捕获RETURN：
$ function foo() {
> trap "echo finished" RETURN
> echo "doing some things"
> }
$ foo
Will display
会显示
doing some things
finished
From man bash's description of the trapbuiltin :
Fromman bash对trap内置函数的描述：
If a sigspec is RETURN, the command arg is executed each time a shell function or a script executed with the . or source builtins finishes executing.
如果 sigspec 是 RETURN，则每次使用 . 或源内置函数完成执行。
