bash - shell变量的名称可以有空格吗？

Question

我想导出一个带空格的变量名。是否可以在 shell export 命令中使用？

{'Truststore Filename': '/hom/truststore.jks', 'Truststore Password': 'pass'}

$ export 'Truststore Password'=clientpass
-bash: export: `Truststore Password=clientpass': not a valid identifier

但我想使用 export 命令导出变量，因为我们要导出的变量不止一个，名称中有空格。

但是，下面的方法是可行的。

$ env 'Truststore Password'=clientpass 'Truststore Filename'=/hom/truststore.jks python3 script.py

Answer 1

不，这是不可能的，因为a variable in bash cannot have a name that includes spaces :

name

A word consisting solely of letters, numbers, and underscores, and beginning with a letter or underscore. Names are used as shell variable and function names. Also referred to as an identifier.

env，如您所见，按照不同的规则播放:

Environment variable names can be empty, and can contain any characters other than ‘=’ and ASCII NUL. However, it is wise to limit yourself to names that consist solely of underscores, digits, and ASCII letters, and that begin with a non-digit, as applications like the shell do not work well with other names.

(来源:info '(coreutils) env invocation'；强调我的)

例子，here's another post with an answer about how much of a pain it is to grab the output of an environment variable with spaces