读取命令:以颜色显示提示(或启用反斜杠转义的解释) [英] Read Command : Display the prompt in color (or enable interpretation of backslash escapes)

问题描述

我经常使用类似 read -e -p "> All good ? (y/n)" -n 1 confirm; 来向用户请求确认.

I often use something like read -e -p "> All good ? (y/n)" -n 1 confirm; to ask a confirm to the user.

我正在寻找一种方法来为输出着色，就像命令 echo -e 所做的那样:

I'm looking for a way to colorize the output, as the command echo -e does :

echo -e "33[31m";
echo "Foobar";       // will be displayed in red
echo -e "33[00m";

我正在使用 xterm.

I'm using xterm.

在man echo中，它说:

-e 启用反斜杠转义解释

-e enable interpretation of backslash escapes

有没有办法用 read 命令做同样的事情?(手册页中没有任何内容 :( -r 选项不起作用)

Is there a way to do the same thing with the read command ? (nothing in the man page :( -r option doesn't work)

推荐答案

read 不会处理 -p 参数中的任何特殊转义，因此您需要从字面上指定它们.bash 的 ANSI 引用字符串对此很有用:

read won't process any special escapes in the argument to -p, so you need to specify them literally. bash's ANSI-quoted strings are useful for this:

read -p $'e[31mFoobare[0m: ' foo

您还应该能够使用 Control-v Escape 键入文字转义字符，它将显示为 ^[ 在终端:

You should also be able to type a literal escape character with Control-v Escape, which will show up as ^[ in the terminal:

read -p '^[[31mFoobar^[[0m: ' foo

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