init.d 脚本无法访问 alsa 音频

Question

我编写了一个简单的 init.d 脚本来启动硬件监控脚本。它工作正常，只是无法访问 alsa 音频服务：

#! /bin/sh

SCRIPT_PATH="/d/SharedPrograms/hwleds.py"

case $1 in
    start)
        say "starting service hwleds..."
        python $SCRIPT_PATH &
        exit $?
        ;;
    stop)
        pkill -f "python $SCRIPT_PATH"
        exit $?
        ;;
    restart)
        $0 stop
        sleep 1
        $0 start
        ;;
    *)
        echo "Usage: $0 {start|stop|restart}"
        exit 1
esac

exit 1

say我从命令和 python 脚本中得到的错误是：

audio_open_alsa: failed to open audio device default. Operation not permitted

编辑：如果 python 脚本由 root 用户通过交互式 shell 正常启动，则它可以访问 alsa，只有在启动过程中作为服务启动或通过service hwleds start.

我的实际情况/root/.asoundrc：

defaults.pcm.card 0
defaults.pcm.device 3

ctl.equal {
  type equal;
}

pcm.plugequal {
  type equal;
  # Modify the line below if you don't
  # want to use sound card 0.
  slave.pcm "plughw:0,3";
  # or if you want to use with multiple applications output to dmix
  # slave.pcm "plug:dmix"
}

#pcm.equal {
  # Or if you want the equalizer to be your
  # default soundcard uncomment the following
  # line and comment the above line.
 pcm.!default {
  type plug;
  slave.pcm plugequal;
}

Answer 1

在volumio上也有同样的问题。通过删除.alsaequal.bin来解决/var/lib/mpd/