逐行读取文件时请求用户输入

Question

对于类，我需要编写一个 Bash 脚本，该脚本将从中获取输出ispell，当我尝试在 while 循环内请求用户输入时，它只会将文件的下一行保存为用户输入。

我怎样才能在 while 循环中请求用户输入？

#!/bin/bash
#Returns the misspelled words
#ispell -l < file

#define vars
ISPELL_OUTPUT_FILE="output.tmp";
INPUT_FILE=$1


ispell -l < $INPUT_FILE > $ISPELL_OUTPUT_FILE;

#echo a new line for give space between command
#and the output generated
echo "";

while read line;
do
   echo "'$line' is misspelled. Press "Enter" to keep";
   read -p "this spelling, or type a correction here: " USER_INPUT;

   if [ $USER_INPUT != "" ]
   then
      echo "INPUT: $USER_INPUT";
   fi


   echo ""; #echo a new line
done < $ISPELL_OUTPUT_FILE;

rm $ISPELL_OUTPUT_FILE;

Answer 1

你不能在你的while.你需要使用另一个文件描述符

尝试以下版本：

#!/bin/bash
#Returns the misspelled words
#ispell -l < file

#define vars
ISPELL_OUTPUT_FILE="output.tmp";
INPUT_FILE=$1


ispell -l < $INPUT_FILE > $ISPELL_OUTPUT_FILE;

#echo a new line for give space between command
#and the output generated
echo "";

while read -r -u9 line;
do
   echo "'$line' is misspelled. Press "Enter" to keep";
   read -p "this spelling, or type a correction here: " USER_INPUT;

   if [ "$USER_INPUT" != "" ]
   then
      echo "INPUT: $USER_INPUT";
   fi


   echo ""; #echo a new line
done 9< $ISPELL_OUTPUT_FILE;

rm "$ISPELL_OUTPUT_FILE"

看如何防止其他命令“吃掉”输入

笔记

• 使用更多报价！它们至关重要。看http://mywiki.wooledge.org/Quotes和http://wiki.bash-hackers.org/syntax/words
• bash不是C或Perl，无需;在两端各放线

Answer 2

#!/bin/bash

exec 3<> /dev/stdin

ispell -l < $1 | while read line
do
    echo "'$line' is misspelled. Press 'Enter' to keep"
    read -u 3 -p "this spelling, or type a correction here: " USER_INPUT

    [ "$USER_INPUT" != "" ] && echo "INPUT: $USER_INPUT"
done