逐行读取文件时请求用户输入


9

对于班级,我需要编写一个Bash脚本,该脚本将获取输出ispell,当我尝试在while循环内请求用户输入时,它仅将文件的下一行保存为用户输入。

我该如何在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;

Answers:


8

您无法在自己的主机中这样做while。您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"

请参阅如何防止其他命令“吃掉”输入

笔记


0
#!/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
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