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I've been writing some shell script and I would find it useful if there was the ability to halt the execution of said shell script if any of the commands failed. 我一直在写一些shell脚本，如果有任何命令失败的话，如果能够停止执行该shell脚本，我会发现它很有用。 See below for an example: 参见以下示例：

#!/bin/bash  cd some_dir  ./configure --some-flags  make  make install

So in this case if the script can't change to the indicated directory then it would certainly not want to do a ./configure afterwards if it fails. 因此，在这种情况下，如果脚本无法更改到指示的目录，那么如果失败，它肯定不会在之后执行./configure。

Now I'm well aware that I could have an if check for each command (which I think is a hopeless solution), but is there a global setting to make the script exit if one of the commands fails? 现在我很清楚，我可以对每个命令进行if检查（我认为这是一个绝望的解决方案），但是是否存在全局设置，如果其中一个命令失败，则退出脚本？

#1楼

参考：

#2楼

Here is how to do it: 这是操作方法：

#!/bin/shabort(){    echo >&2 '****************** ABORTED ******************'    echo "An error occurred. Exiting..." >&2    exit 1}trap 'abort' 0set -e# Add your script below....# If an error occurs, the abort() function will be called.#----------------------------------------------------------# ===> Your script goes here# Done!trap : 0echo >&2 '*************** DONE *** ************'

#3楼

One idiom is: 一种成语是：

cd some_dir && ./configure --some-flags && make && make install

I realize that can get long, but for larger scripts you could break it into logical functions. 我意识到这可能会很长，但是对于较大的脚本，您可以将其分解为逻辑功能。

#4楼

I think that what you are looking for is the trap command: 我认为您正在寻找的是trap命令：

trap command signal [signal ...]

For more information, see . 有关更多信息，请参阅 。

Another option is to use the set -e command at the top of your script - it will make the script exit if any program / command returns a non true value. 另一个选择是在脚本顶部使用set -e命令-如果任何程序/命令返回非真值，它将使脚本退出。

#5楼

To exit the script as soon as one of the commands failed, add this at the beginning: 要在其中一个命令失败后立即退出脚本，请在开头添加以下内容：

set -e

This causes the script to exit immediately when some command that is not part of some test (like in a if [ ... ] condition or a && construct) exits with a non-zero exit code. 当不属于某些测试的某些命令（例如，在if [ ... ]条件或&&构造中）不使用非零退出代码退出时，这将导致脚本立即退出。

#6楼

Use the builtin: 使用内置的 ：

#!/bin/bashset -e# Any subsequent(*) commands which fail will cause the shell script to exit immediately

Alternatively, you can pass -e on the command line: 或者，您可以在命令行上传递-e ：

bash -e my_script.sh

You can also disable this behavior with set +e . 您也可以使用set +e 禁用此行为。

You may also want to employ all or some of the the -e -u -x and -o pipefail options like so: 您可能还希望使用-e -u -x和-o pipefail选项的全部或部分，如下所示：

set -euxo pipefail

-e exits on error, -u errors on undefined variables, and -o (for option) pipefail exits on command pipe failures. -e在错误时退出， -u错误在未定义变量上退出， -o (for option) pipefail在命令管道失败时退出。 Some gotchas and workarounds are documented well . 很好地记录了一些陷阱和解决方法。

(*) Note: （*） 注意：

The shell does not exit if the command that fails is part of the command list immediately following a while or until keyword, part of the test following the if or elif reserved words, part of any command executed in a && or || 壳不退出如果失败的命令是紧跟在同时或直到关键字，测试的部分继如果或elif的保留字的命令列表的一部分，在一个执行的任何命令或&&的一部分|| list except the command following the final && or || 列表，最后一个&&或||之后的命令除外 , any command in a pipeline but the last, or if the command's return value is being inverted with ! ，管道中除最后一条命令外的任何命令，或者如果命令的返回值正使用！

(from man bash ) （来自man bash ）

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