读取命令:以彩色显示提示(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;之类的方法向用户确认.

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

我正在寻找一种使输出着色的方法，如命令echo -e那样:

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

echo -e "\033[31m";
echo "Foobar";       // will be displayed in red
echo -e "\033[00m";

我正在使用xterm.

I'm using xterm.

在man echo中，它说:

-e启用反斜杠转义的解释

-e enable interpretation of backslash escapes

是否可以使用read命令执行相同的操作? (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不会在-p的参数中处理任何特殊的转义符，因此您需要按字面值指定它们. bash的ANSI引号字符串对此有用:

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[31mFoobar\e[0m: ' foo

您还应该能够使用 Control - v Escape 键入文字转义字符，该字符将在^[中显示终端:

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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