本文介绍了当'set -e'处于活动状态时,Bash获取命令的退出状态?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我通常在Bash脚本中设置了-e,但是偶尔我想运行命令并获取返回值.

I generally have -e set in my Bash scripts, but occasionally I would like to run a command and get the return value.

如果不做set +e; some-command; res=$?; set -e舞蹈,我该怎么做?

Without doing the set +e; some-command; res=$?; set -e dance, how can I do that?

推荐答案

摘自bash手册:

所以,只需:

#!/bin/bash

set -eu

foo() {
  # exit code will be 0, 1, or 2
  return $(( RANDOM % 3 ))
}

ret=0
foo || ret=$?
echo "foo() exited with: $ret"

示例运行:

$ ./foo.sh
foo() exited with: 1
$ ./foo.sh
foo() exited with: 0
$ ./foo.sh
foo() exited with: 2

这是规范的做法.

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08-28 04:41