bash - 如何为读取命令添加换行符？

Question

 read -p "Please Enter a Message:" message

如何在 Message: 之后添加换行符？

Answer 1

只是在寻找完全相同的东西。您可以使用:

# -r and -e options are unrelated to the answer.
read -rep $'Please Enter a Message:\n' message

它会完全按照要求工作:

Please enter a Message:
_

这是 bash 联机帮助页的摘录，对其进行了解释:

Words of the form $'string' are treated specially. The word expands to string, with backslash-escaped characters replaced as specified by the ANSI C standard. Backslash escape sequences, if present, are decoded as follows:

• (...)
• \n new line
• (...)

The expanded result is single-quoted, as if the dollar sign had not been present.

我花了一段时间才发现。

请注意，单引号和双引号在这方面的行为不同:

A double-quoted string preceded by a dollar sign ($) will cause the string to be translated according to the current locale. If the cur- rent locale is C or POSIX, the dollar sign is ignored. If the string is translated and replaced, the replacement is double-quoted.