[SOLVED] Using httpd/apache to play audio on server.

snowkitty · 10-05-2014, 12:44 AM

file.php

Code:

<?php
exec('script.sh');
?>

script.sh

Code:

#!/bin/sh
/usr/bin/aplay /msc/share/attention.wav

# which aplay

Code:

/usr/bin/aplay

/etc/apache2/apache.conf

Code:

# These need to be set in /etc/apache2/envvars
User ${APACHE_RUN_USER}
Group ${APACHE_RUN_GROUP}

/etc/apache2/envvars

Code:

export APACHE_RUN_USER=www-data
export APACHE_RUN_GROUP=www-data

# groups www-data

Code:

www-data : www-data audio pulse pulse-access

Objective: Allow opening a webpage to play an audio file on the server, not on the client loading the page, but in order to make the server hosting system play an audio file. It is going to be a script opening the page, so the php script doesn't have reason to provide feedback or be more than a blank page, it's just means of executing a script to play audio on the server system.

Problem: I'm not sure what I am doing wrong here, or why this is not working, or if this is simply not possible. However, I am not able to get the audio file to play.

I'm open to suggestions of alternative methods of doing this same thing, but I have to do it over http, because it's the only means I have of making the client communicate with server.

MisterBark · 10-05-2014, 12:35 PM

I believe that your script does not have the permission to play audio, OR, that your .sh file is not executable.

What is the output of:

Code:

ls -l script.sh

You should make a:

Code:

chmod 755 script.sh

Does this play the sound:

Code:

sudo ./script.sh

Does this play the sound:

Code:

sudo -u www-data ./script.sh

If none of these help, please try this:
Add "sleep 45" as the 2nd line of your script, which gives you:

Code:

#!/bin/sh
sleep 45
/usr/bin/aplay /msc/share/attention.wav

then load the page and as it is loading, type this:

Code:

ps auxm | grep -i script.sh

Do you see your script running? It should because you now have a 45 second sleep inside.

snowkitty · 10-05-2014, 01:20 PM

Code:

# sudo -u www-data ./script.sh
ALSA lib pcm_dmix.c:1022:(snd_pcm_dmix_open) unable to open slave
aplay: main:722: audio open error: Device or resource busy

So here's the point of failure then. Now to just resolve that and everything should be working.

Edit: Found sollution.
It's not pretty, but it does what I need.

Code:

#!/usr/bin/expect -f
set force_conservative 0 
if {$force_conservative} {
        set send_slow {1 .1}
        proc send {ignore arg} {
                sleep .1
                exp_send -s -- $arg
        }
}
set timeout -1
spawn ssh snow@localhost -x exec aplay /misc/sounds/attention.wav
expect "*password*"
send -- "PASSWORD\r"
expect eof

MisterBark · 10-05-2014, 05:35 PM

haha... ok, then maybe that works?

Code:

sudo -u snow ./script.sh