bash - 通过键盘输入暂停脚本

Question

(抱歉我的英语不好。)我想通过按 [SPACE] 栏来暂停正在运行的脚本。脚本必须运行，直到用户不按[SPACE] 栏，然后暂停20 秒，然后继续运行。如何在脚本运行时持续观察键盘输入？

Answer 1

一种方法:

#!/bin/bash -eu
script(){ #a mock for your script
    while :; do
        echo working
        sleep 1
    done
}

set -m #use job control
script & #run it in the background in a separate process group
read -sd ' ' #silently read until a space is read
kill -STOP -$! #stop the background process group
sleep 2 #wait 2 seconds (change it to 20 for your case)
kill -CONT -$! #resume the background process group
fg #put it in the forground so it's killable with Ctrl+C