巴什读取退格键的行为问题 [英] Bash read backspace button behavior problem

问题描述

在bash中使用读取，pressing退格不会删除最后输入的字符，但似乎退格追加到输入缓冲区。有什么办法我可以改变它，以便删除删除输入键入的最后一个关键点？如果是的话怎么样？

下面是我使用它，如果它的任何帮助，一个简单的例子PROG：

 ＃！/斌/庆典颜色（）{＃$ 1 =文本colourise $ 2 =颜色标识
        printf的％s％s％S$（tput的setaf $ 2）$ 1$（tput的sgr0）
}
game_over（）{＃$ 1 =信息$ 2 =得分
        printf的\\ n％S \\ n％S \\ n$（彩游戏结束！1），$ 1
        printf的你的分数：％S \\ n$（颜色$ 2 3）
        退出0
}得分= 0
明确
而真实的;做
        字= $（SHUF -n1的/ usr /共享/字典/字）#random从字典中的单词
        字= $ {字,,} q若要小写
        LEN = $ {＃字}
        让超时=（3 + $ LEN）/ 2
        printf的％S（时间％S）：$（$色字2）$（颜色$超时3）
        读到这里-t $超时-n $ LEN输入＃阅读输入
        如果[$？ -ne 0];然后
                game_over你不及时回答$比分
        ELIF [$输入=$词！]然后
                game_over你没有输入正确的字$得分;
        科幻
        printf的\\ n
        让得分+ = $超时
DONE
 

解决方案

选项 -n nchars 打开终端进入原始模式，所以你最好的机会是靠的readline （-e） [文件] ：

  $读-n10 -e VAR
 

顺便说一句，好的想法，虽然我将离开这个词的最终用户（这是一个下意识的反应，以preSS的收益的）。

When using read in bash, pressing backspace does not delete the last character entered, but appears to append a backspace to the input buffer. Is there any way I can change it so that delete removes the last key typed from the input? If so how?

Here's a short example prog I'm using it with if it's of any help:

#!/bin/bash

colour(){ #$1=text to colourise $2=colour id
        printf "%s%s%s" $(tput setaf $2) "$1" $(tput sgr0)
}
game_over() { #$1=message $2=score      
        printf "\n%s\n%s\n" "$(colour "Game Over!" 1)" "$1"
        printf "Your score: %s\n" "$(colour $2 3)"
        exit 0
}

score=0
clear
while true; do
        word=$(shuf -n1 /usr/share/dict/words) #random word from dictionary 
        word=${word,,} #to lower case
        len=${#word}
        let "timeout=(3+$len)/2"
        printf "%s  (time %s): " "$(colour $word 2)" "$(colour $timeout 3)"
        read -t $timeout -n $len input #read input here
        if [ $? -ne 0 ]; then   
                game_over "You did not answer in time" $score
        elif [ "$input" != "$word" ]; then
                game_over "You did not type the word correctly" $score;
        fi  
        printf "\n"
        let "score+=$timeout" 
done

解决方案

The option -n nchars turns the terminal into raw mode, so your best chance is to rely on readline (-e) [docs]:

$ read -n10 -e VAR

BTW, nice idea, although I would leave the end of the word to the user (it's a knee-jerk reaction to press return).

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