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如何在不修改FreeBSD，OpenBSD和Linux的情况下获取bash脚本？

[英]How do I get a bash script working on FreeBSD, OpenBSD and Linux without modifying it?

原文 2013-07-12 12:12:21 6 2 linux/ bash/ freebsd/ openbsd

Sorry, the headline might be a bit irritating, but I didn't know anything better. 对不起，标题可能有点刺激，但我不知道更好。 Anyway, I want a bash script to work on FreeBSD, OpenBSD and Linux without modifying it, but bash isn't located at the same place in Linux and BSD. 无论如何，我想要一个bash脚本可以在FreeBSD，OpenBSD和Linux上运行而无需修改它，但是bash并不位于Linux和BSD的同一个地方。

So, if I write #!/bin/bash then it won't work on BSD, because the bash shell is located in /usr/local/bin/bash there. 所以，如果我写#!/bin/bash然后它将无法在BSD上运行，因为bash shell位于/usr/local/bin/bash中。 Is there any solution to get this script working on both? 是否有任何解决方案可以让这个脚本同时工作？

Or do I really need to ship two scripts with different paths...? 或者我真的需要发送两个不同路径的脚本......？

2 个解决方案

在shebang中使用env （ #!/usr/bin/env bash ）应该使脚本OS不可知。

I like the answer about using #!/usr/bin/env bash It is an interesting and excellent answer, but that would only work if bash is in the path. 我喜欢使用#!/usr/bin/env bash答案这是一个有趣且优秀的答案，但只有当bash在路径中时才会有效。

Another option might be to use #!/bin/sh which is the most universally compatible shell location. 另一种选择可能是使用#!/bin/sh ，它是最普遍兼容的shell位置。 Then, have the script do something in sh , such as check where bash is installed (if bash is even installed). 然后，让脚本在sh执行某些操作，例如检查bash的安装位置（如果安装了bash ）。 Another option might be to have bash exist to both locations. 另一个选择可能是两个位置都存在bash 。 Making another installation may sound like overkill, but this goal could be accomplished as simply as creating a hard link so that bash actually exists in both locations. 进行另一次安装可能听起来有点过分，但这个目标可以像创建硬链接一样完成，以便bash实际存在于两个位置。