调节音量的脚本

#!/bin/bash

# code by slucx

function usage() {
    pro=$(basename $0)
    echo "Welcome to $pro, version 0.1"
    echo "code by slucx([e-mail])"
    echo "$pro add/sub/mute/help"
    echo "arguments:"
    echo -e "\t add - increase the sound volume"
    echo -e "\t sub - decrease the sound volume"
    echo -e "\t mute - toggle mute and not"
    echo -e "\t help - print this document"
}

if [ $# != 1 ]; then
    usage
    exit
fi

case $1 in
    "add")
    amixer set Master 2%+ unmute
    amixer set PCM 2%+ unmute
    ;;
    "sub")
    amixer set Master 2%- unmute
    amixer set PCM 2%- unmute
    ;;
    "mute")
    amixer set Master toggle
    amixer set PCM toggle
    ;;
    "help")
    usage
    exit
    ;;
esac

用法：
xxx.sh add 增加音量
xxx.sh sub 减少音量
xxx.sh mute 切换静音