Bash 脚本中的箭头键产生奇怪的字母

Question

I wrote a simple script to manage the containers inside my application, however, whenever I press the arrow keys, they produce something like [[A or other characters. How can I fix the issue?

Example command is ./service.sh app shell which will open up the shell of my Laravel application inside Docker container.

#!/usr/bin/env bash

#application=$(basename "$PWD")
application="plexmediamanager"

services=("app", "roadrunner", "scheduler", "frontend", "nginx", "redis", "database", "queue", "torrent", "jackett", "traefik")
actions=("start", "stop", "restart", "shell", "rebuild")

if [[ ! "${services[@]}" =~ "${1}" ]]; then
    echo "Unknown service: ${1}"
    printf -v servicesString "%s" "${services[@]}"
    echo "Available services: ${servicesString}"
    exit 0
fi

if [[ ! "${actions[@]}" =~ "${2}" ]]; then
    echo "Unknown action: ${2}"
    echo "Available actions: start|stop|restart|shell|rebuild"
    exit 0
fi

case "$2" in
    "start")
    docker-compose start $1
    ;;
    "stop")
    docker-compose stop $1
    ;;
    "restart")
    docker-compose restart $1
    ;;
    "shell")
    docker exec -it "${application}_${1}" /bin/sh
    ;;
    "rebuild")
    docker-compose stop $1
    docker-compose build $1
    docker-compose start $1
    ;;
esac

Answer 1

As mentioned in comments, the shell you call in your case statement does not exit and has no functionality for scrolling through history as you are used to in bash. You may be able to get that shell to exit using something like this:

docker exec -it "${application}_${1} && exit" /bin/sh

But that's just an untested guess.

Of course if you leave off the call to the other shell (and let the script run that command in the parent shell), you could keep your script awaiting new command input by allowing for user input via read and stowing that inside a while loop.

(Also, it should be noted that you are handing exec two user-supplied variables and that is not a good practice. Avoid exec , generally.)