关于bash：’#!/ bin / sh -xe’是什么意思？


What does '#!/bin/sh -xe' mean?

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在Tribler的Github上的存储库中，我看到一个带有解释器的文件：#!/bin/sh -xe。

在Mac和Linux上，man sh重定向到BASH(1)(与man bash相同)。

在本手册文件中，在以下章节中：

OPTIONS

没有提到期权-x，也没有提到期权-e。

口译员#!/bin/sh -xe的意思是什么？

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我发现这一点：

man sh：

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-x xtrace        Write each command to standard error (preceded by
                            a ‘+ ’) before it is executed.  Useful for debug‐
                            ging.


-e errexit       If not interactive, exit immediately if any
                            untested command fails.  The exit status of a com‐
                            mand is considered to be explicitly tested if the
                            command is used to control an if, elif, while, or
                            until; or if the command is the left hand operand
                            of an"&&" or"||" operator.

似乎这些只是错误控制选项，可以确保在命令失败时不会发生更糟的情况。

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每页：阅读更多

The -a, -b, -C, -e, -f, -m, -n, -o option, -u, -v, and -x options are described as part of the set utility in Special Built-In Utilities. The option letters derived from the set special built-in shall also be accepted with a leading plus sign ( '+' ) instead of a leading hyphen (meaning the reverse case of the option as described in this volume of IEEE Std 1003.1-2001).

当你阅读set手册时，你会得到：

-x The shell shall write to standard error a trace for each command after it expands the command and before it executes it. It is unspecified whether the command that turns tracing off is traced.

和

-e When this option is on, if a simple command fails for any of the reasons listed in Consequences of Shell Errors or returns an exit status value >0, and is not part of the compound list following a while, until, or if keyword, and is not a part of an AND or OR list, and is not a pipeline preceded by the ! reserved word, then the shell shall immediately exit.