功能名称在bash的SH有效，但不 [英] Function name valid in bash but not in sh

问题描述

而玩弄的bash和sh，我发现下面是有效的在bash：

While playing around with bash and sh, I found out that the following is valid in bash:

system.out.println () { printf "$1"; }

，但不是在SH

but not in sh:

sh: `system.out.println': not a valid identifier

为什么会变成这样的区别在那里？请问上面定义的函数违反公约的一些（POSIX等），导致这个错误？

Why would this difference be there? Does the function defined above violate some convention (POSIX etc.) that causes this error?

推荐答案

这只是小点，你不能使用shell函数名点。或任何变量名，为这一问题。

It's just the dots, you can't use dots in shell function names. Or any variable name, for that matter.

我将您链接到这个问题：<一href=\"http://stackoverflow.com/questions/2821043/allowed-characters-in-linux-environment-variable-names\">Allowed在Linux环境变量名中的字符

I'll link you to this question: Allowed characters in linux environment variable names

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