Question

我想知道我们如何为更改命令提示提供输入。我想使用shell脚本

“＃”通常提示和'＆gt;'的示例是特定于我的程序的提示：

mypc:/home/usr1#
mypc:/home/usr1# myprogram
myprompt> command1
response1
myprompt> command2
response2
myprompt> exit
mypc:/home/usr1#
mypc:/home/usr1#

Answer 1

如果我理解正确，您希望按顺序向程序myprogram发送特定命令。

要实现这一点，您可以使用简单的expect脚本。我将假设myprogram注意到myprompt>的提示，并且myprompt>符号未显示在response1中：

#!/usr/bin/expect -f
#this is the process we monitor
spawn ./myprogram

#we wait until 'myprompt>' is displayed on screen
expect "myprompt>" {
    #when this appears, we send the following input (\r is the ENTER key press)
    send "command1\r"
}

#we wait until the 1st command is executed and 'myprompt>' is displayed again
expect "myprompt>" {
    #same steps as before
    send "command2\r"
}

#if we want to manually interract with our program, uncomment the following line.
#otherwise, the program will terminate once 'command2' is executed
#interact

要启动，只需调用myscript.expect，如果脚本与myprogram位于同一文件夹中。

Answer 2

鉴于myprogram是一个脚本，它必须提示输入while read IT; do ...something with $IT ...;done之类的内容。很难确切地说如何更改该脚本而不看它。 echo -n 'myprompt>将是最简单的补充。

Answer 3

可以使用PS3和select构建

来完成

#!/bin/bash

PS3='myprompt> '

select cmd in command1 command2
do
    case $REPLY in
        command1)
            echo response1
            ;;
        command2)
            echo response2
            ;;
        exit)
            break
            ;;
    esac
done

或echo和read内置

prompt='myprompt> '
while [[ $cmd != exit ]]; do
    echo -n "$prompt"
    read cmd
    echo ${cmd/#command/response}
done

在shell脚本中输入专有命令提示符

3 个答案: