clipctl

#!/bin/sh
clipmanager_name="clipmanager"
clipmanager_pid=$(pgrep -u "$(id -u)" -nf "$clipmanager_name$")

log()
{
    # printf "%s\n" "$1" | xargs
    printf "\033[31m->\033[97m %s\033[0m\n" "$1" | xargs
}

redirect()
{
    exec </dev/null 1>&0 2>&0
}

fork()
{
    exec setsid -f -- "$@"
}

spawn()
{
    redirect
    fork "$@"
}

usage()
{
    echo "clipctl"
    echo "  enable:     enable clipmanager"
    echo "  disable:    disable clipmanager"
    echo "  run/start:  start clipmanager"
    echo "  kill/stop:  kill clipmanager"
    echo "  restart:    restart clipmanager"
    echo "  status:     check if clipmanager is running"
    echo "  clear:      clear clipboard"
    echo "  help:       help menu"
    exit
}

is_running()
{
    if [ -z "$clipmanager_pid" ]; then
        log "Clipmanager is not running"
        return 1
    else
        return 0
    fi
}

is_running_inv()
{
    if [ -z "$clipmanager_pid" ]; then
        return 1
    else
        log "Clipmanager is already running"
        return 0
    fi
}

clip_kill()
{
    kill -TERM "$clipmanager_pid" && printf "kill" | xclip -selection clipboard
}

case "$1" in
    "enable") is_running && kill -USR2 "$clipmanager_pid" ;;
    "disable") is_running && kill -USR1 "$clipmanager_pid" ;;
    "run"|"start") is_running_inv || spawn clipmanager ;;
    "kill"|"stop") is_running && clip_kill ;;
    "restart")
        if [ -n "$clipmanager_pid" ]; then
            clip_kill && spawn clipmanager
        else
            spawn clipmanager
        fi
        ;;
    "status") is_running && is_running_inv ;;
    "clear") printf "clear" | xclip -selection clipboard ;;
    "help") usage ;;
    *) log "Invalid argument. Try help for help" ;;
esac