Set volume with php and amixer/pulseaudio
My problem is, that the following script executes in the terminal fine but on my Apache2-Webserver it doesn't do anything.
<?php
exec("/usr/bin/pactl set-sink-volume 0 60%");
?>
I can hear the music getting louder, when its executed from the terminal using
sudo php /var/www/html/test2.php
Other commands with exec work perfectly fine on the webserver. Working example:
<?php
exec("/sbin/shutdown -r now");
?>
Setup:
- Apache 2.4
- PHP 7
- Raspberry Pi 3b+
- Raspian
- Speaker connected via Headphone Jack
Thanks for any help in advance!
audio php raspberry-pi
asked Dec 9 '18 at 10:27
Silvan
13
migrated from superuser.com Dec 9 '18 at 12:37
This question came from our site for computer enthusiasts and power users.
add a comment |
My problem is, that the following script executes in the terminal fine but on my Apache2-Webserver it doesn't do anything.
<?php
exec("/usr/bin/pactl set-sink-volume 0 60%");
?>
I can hear the music getting louder, when its executed from the terminal using
sudo php /var/www/html/test2.php
Other commands with exec work perfectly fine on the webserver. Working example:
<?php
exec("/sbin/shutdown -r now");
?>
Setup:
- Apache 2.4
- PHP 7
- Raspberry Pi 3b+
- Raspian
- Speaker connected via Headphone Jack
Thanks for any help in advance!
audio php raspberry-pi
asked Dec 9 '18 at 10:27
Silvan
13
migrated from superuser.com Dec 9 '18 at 12:37
This question came from our site for computer enthusiasts and power users.
Is apache (typically user www-data) part of the sudoers group?
– Kasper Agg
Dec 9 '18 at 13:47
I also think you shouldn't be invoking command line commands with sudo through a webapp. Why not add www-data to the group that is allowed to execute pactl?
– Kasper Agg
Dec 9 '18 at 13:49
Okay, how can I add www-data to the execution group?
– Silvan
Dec 9 '18 at 14:01
You could try google for that: google.nl/…
– Kasper Agg
Dec 9 '18 at 14:05
add a comment |
My problem is, that the following script executes in the terminal fine but on my Apache2-Webserver it doesn't do anything.
<?php
exec("/usr/bin/pactl set-sink-volume 0 60%");
?>
I can hear the music getting louder, when its executed from the terminal using
sudo php /var/www/html/test2.php
Other commands with exec work perfectly fine on the webserver. Working example:
<?php
exec("/sbin/shutdown -r now");
?>
Setup:
- Apache 2.4
- PHP 7
- Raspberry Pi 3b+
- Raspian
- Speaker connected via Headphone Jack
Thanks for any help in advance!
audio php raspberry-pi
asked Dec 9 '18 at 10:27
Silvan
13
My problem is, that the following script executes in the terminal fine but on my Apache2-Webserver it doesn't do anything.
<?php
exec("/usr/bin/pactl set-sink-volume 0 60%");
?>
I can hear the music getting louder, when its executed from the terminal using
sudo php /var/www/html/test2.php
Other commands with exec work perfectly fine on the webserver. Working example:
<?php
exec("/sbin/shutdown -r now");
?>
Setup:
- Apache 2.4
- PHP 7
- Raspberry Pi 3b+
- Raspian
- Speaker connected via Headphone Jack
Thanks for any help in advance!
audio php raspberry-pi
audio php raspberry-pi
asked Dec 9 '18 at 10:27
Silvan
13
asked Dec 9 '18 at 10:27
Silvan
13
edited Dec 9 '18 at 15:23
asked Dec 9 '18 at 10:27
Silvan
13
asked Dec 9 '18 at 10:27
Silvan
13
asked Dec 9 '18 at 10:27
Silvan
13
13
migrated from superuser.com Dec 9 '18 at 12:37
This question came from our site for computer enthusiasts and power users.
migrated from superuser.com Dec 9 '18 at 12:37
This question came from our site for computer enthusiasts and power users.
Is apache (typically user www-data) part of the sudoers group?
– Kasper Agg
Dec 9 '18 at 13:47
I also think you shouldn't be invoking command line commands with sudo through a webapp. Why not add www-data to the group that is allowed to execute pactl?
– Kasper Agg
Dec 9 '18 at 13:49
Okay, how can I add www-data to the execution group?
– Silvan
Dec 9 '18 at 14:01
You could try google for that: google.nl/…
– Kasper Agg
Dec 9 '18 at 14:05
add a comment |
Is apache (typically user www-data) part of the sudoers group?
– Kasper Agg
Dec 9 '18 at 13:47
I also think you shouldn't be invoking command line commands with sudo through a webapp. Why not add www-data to the group that is allowed to execute pactl?
– Kasper Agg
Dec 9 '18 at 13:49
Okay, how can I add www-data to the execution group?
– Silvan
Dec 9 '18 at 14:01
You could try google for that: google.nl/…
– Kasper Agg
Dec 9 '18 at 14:05
Is apache (typically user www-data) part of the sudoers group?
– Kasper Agg
Dec 9 '18 at 13:47
Is apache (typically user www-data) part of the sudoers group?
– Kasper Agg
Dec 9 '18 at 13:47
I also think you shouldn't be invoking command line commands with sudo through a webapp. Why not add www-data to the group that is allowed to execute pactl?
– Kasper Agg
Dec 9 '18 at 13:49
I also think you shouldn't be invoking command line commands with sudo through a webapp. Why not add www-data to the group that is allowed to execute pactl?
– Kasper Agg
Dec 9 '18 at 13:49
Okay, how can I add www-data to the execution group?
– Silvan
Dec 9 '18 at 14:01
Okay, how can I add www-data to the execution group?
– Silvan
Dec 9 '18 at 14:01
You could try google for that: google.nl/…
– Kasper Agg
Dec 9 '18 at 14:05
You could try google for that: google.nl/…
– Kasper Agg
Dec 9 '18 at 14:05
add a comment |
2 Answers
2
active
oldest
votes
First check the group. One way is to use ls -lah /usr/bin/pactl. It should show amongst other information, the user and group who have permission. It also shows if the user, group and others have permission to execute at all.
To add an existing user account to a group on your system, use the usermodcommand, replacing examplegroup with the name of the group you want to add the user to andexampleusername with the name of the user you want to add.
usermod -a -G examplegroup exampleusername
For example, to add the user www-data to the group music, use the following command:
usermod -a -G music www-data
Source
edit
Another way would be to allow all users to execute /usr/bin/pactl by adding execute bit to all.
answered Dec 9 '18 at 14:12
Kasper Agg
7217
I executed the following command in the terminal an it worked: sudo -u pi /usr/bin/pactl set-sink-volume 0 20% When I execute it on the webserver it doesn't work. In the sudoers file I have added, that it doesn't need a password to execute this specific command.
– Silvan
Dec 9 '18 at 14:45
I do not understand your comment. In order for apache to execute the same command without using sudo, the apache user (www-data) needs to be added to the group of the executables' group.
– Kasper Agg
Dec 9 '18 at 14:48
But the sbin folder requires sudo rights too and the shutdown command in this folder works from the website, and I didn't change anything on the permissions
– Silvan
Dec 9 '18 at 14:51
Are all flags the same those binaries? Are they for example 777 vs 755?
– Kasper Agg
Dec 9 '18 at 14:56
So I changed the permissions of the /usr/bin/pactl to the exact same as /sbin/shutdown ones, still not working, the flag is now 777.
– Silvan
Dec 9 '18 at 15:10
|
show 16 more comments
My problem is solved. I'm writing files into a folder and a script checks this folder for the files and executes than the code to control the audio (I'm controlling it now with amixer instead of pactl).
Thanks for your suggestions anyway!
answered Dec 10 '18 at 14:38
Silvan
13
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
First check the group. One way is to use ls -lah /usr/bin/pactl. It should show amongst other information, the user and group who have permission. It also shows if the user, group and others have permission to execute at all.
To add an existing user account to a group on your system, use the usermodcommand, replacing examplegroup with the name of the group you want to add the user to andexampleusername with the name of the user you want to add.
usermod -a -G examplegroup exampleusername
For example, to add the user www-data to the group music, use the following command:
usermod -a -G music www-data
Source
edit
Another way would be to allow all users to execute /usr/bin/pactl by adding execute bit to all.
answered Dec 9 '18 at 14:12
Kasper Agg
7217
I executed the following command in the terminal an it worked: sudo -u pi /usr/bin/pactl set-sink-volume 0 20% When I execute it on the webserver it doesn't work. In the sudoers file I have added, that it doesn't need a password to execute this specific command.
– Silvan
Dec 9 '18 at 14:45
I do not understand your comment. In order for apache to execute the same command without using sudo, the apache user (www-data) needs to be added to the group of the executables' group.
– Kasper Agg
Dec 9 '18 at 14:48
But the sbin folder requires sudo rights too and the shutdown command in this folder works from the website, and I didn't change anything on the permissions
– Silvan
Dec 9 '18 at 14:51
Are all flags the same those binaries? Are they for example 777 vs 755?
– Kasper Agg
Dec 9 '18 at 14:56
So I changed the permissions of the /usr/bin/pactl to the exact same as /sbin/shutdown ones, still not working, the flag is now 777.
– Silvan
Dec 9 '18 at 15:10
|
show 16 more comments
First check the group. One way is to use ls -lah /usr/bin/pactl. It should show amongst other information, the user and group who have permission. It also shows if the user, group and others have permission to execute at all.
To add an existing user account to a group on your system, use the usermodcommand, replacing examplegroup with the name of the group you want to add the user to andexampleusername with the name of the user you want to add.
usermod -a -G examplegroup exampleusername
For example, to add the user www-data to the group music, use the following command:
usermod -a -G music www-data
Source
edit
Another way would be to allow all users to execute /usr/bin/pactl by adding execute bit to all.
answered Dec 9 '18 at 14:12
Kasper Agg
7217
I executed the following command in the terminal an it worked: sudo -u pi /usr/bin/pactl set-sink-volume 0 20% When I execute it on the webserver it doesn't work. In the sudoers file I have added, that it doesn't need a password to execute this specific command.
– Silvan
Dec 9 '18 at 14:45
I do not understand your comment. In order for apache to execute the same command without using sudo, the apache user (www-data) needs to be added to the group of the executables' group.
– Kasper Agg
Dec 9 '18 at 14:48
But the sbin folder requires sudo rights too and the shutdown command in this folder works from the website, and I didn't change anything on the permissions
– Silvan
Dec 9 '18 at 14:51
Are all flags the same those binaries? Are they for example 777 vs 755?
– Kasper Agg
Dec 9 '18 at 14:56
So I changed the permissions of the /usr/bin/pactl to the exact same as /sbin/shutdown ones, still not working, the flag is now 777.
– Silvan
Dec 9 '18 at 15:10
|
show 16 more comments
First check the group. One way is to use ls -lah /usr/bin/pactl. It should show amongst other information, the user and group who have permission. It also shows if the user, group and others have permission to execute at all.
To add an existing user account to a group on your system, use the usermodcommand, replacing examplegroup with the name of the group you want to add the user to andexampleusername with the name of the user you want to add.
usermod -a -G examplegroup exampleusername
For example, to add the user www-data to the group music, use the following command:
usermod -a -G music www-data
Source
edit
Another way would be to allow all users to execute /usr/bin/pactl by adding execute bit to all.
answered Dec 9 '18 at 14:12
Kasper Agg
7217
First check the group. One way is to use ls -lah /usr/bin/pactl. It should show amongst other information, the user and group who have permission. It also shows if the user, group and others have permission to execute at all.
To add an existing user account to a group on your system, use the usermodcommand, replacing examplegroup with the name of the group you want to add the user to andexampleusername with the name of the user you want to add.
usermod -a -G examplegroup exampleusername
For example, to add the user www-data to the group music, use the following command:
usermod -a -G music www-data
Source
edit
Another way would be to allow all users to execute /usr/bin/pactl by adding execute bit to all.
answered Dec 9 '18 at 14:12
Kasper Agg
7217
edited Dec 9 '18 at 14:50
answered Dec 9 '18 at 14:12
Kasper Agg
7217
answered Dec 9 '18 at 14:12
Kasper Agg
7217
answered Dec 9 '18 at 14:12
Kasper Agg
7217
7217
I executed the following command in the terminal an it worked: sudo -u pi /usr/bin/pactl set-sink-volume 0 20% When I execute it on the webserver it doesn't work. In the sudoers file I have added, that it doesn't need a password to execute this specific command.
– Silvan
Dec 9 '18 at 14:45
I do not understand your comment. In order for apache to execute the same command without using sudo, the apache user (www-data) needs to be added to the group of the executables' group.
– Kasper Agg
Dec 9 '18 at 14:48
But the sbin folder requires sudo rights too and the shutdown command in this folder works from the website, and I didn't change anything on the permissions
– Silvan
Dec 9 '18 at 14:51
Are all flags the same those binaries? Are they for example 777 vs 755?
– Kasper Agg
Dec 9 '18 at 14:56
So I changed the permissions of the /usr/bin/pactl to the exact same as /sbin/shutdown ones, still not working, the flag is now 777.
– Silvan
Dec 9 '18 at 15:10
|
show 16 more comments
I executed the following command in the terminal an it worked: sudo -u pi /usr/bin/pactl set-sink-volume 0 20% When I execute it on the webserver it doesn't work. In the sudoers file I have added, that it doesn't need a password to execute this specific command.
– Silvan
Dec 9 '18 at 14:45
I do not understand your comment. In order for apache to execute the same command without using sudo, the apache user (www-data) needs to be added to the group of the executables' group.
– Kasper Agg
Dec 9 '18 at 14:48
But the sbin folder requires sudo rights too and the shutdown command in this folder works from the website, and I didn't change anything on the permissions
– Silvan
Dec 9 '18 at 14:51
Are all flags the same those binaries? Are they for example 777 vs 755?
– Kasper Agg
Dec 9 '18 at 14:56
So I changed the permissions of the /usr/bin/pactl to the exact same as /sbin/shutdown ones, still not working, the flag is now 777.
– Silvan
Dec 9 '18 at 15:10
I executed the following command in the terminal an it worked: sudo -u pi /usr/bin/pactl set-sink-volume 0 20% When I execute it on the webserver it doesn't work. In the sudoers file I have added, that it doesn't need a password to execute this specific command.
– Silvan
Dec 9 '18 at 14:45
I executed the following command in the terminal an it worked: sudo -u pi /usr/bin/pactl set-sink-volume 0 20% When I execute it on the webserver it doesn't work. In the sudoers file I have added, that it doesn't need a password to execute this specific command.
– Silvan
Dec 9 '18 at 14:45
I do not understand your comment. In order for apache to execute the same command without using sudo, the apache user (www-data) needs to be added to the group of the executables' group.
– Kasper Agg
Dec 9 '18 at 14:48
I do not understand your comment. In order for apache to execute the same command without using sudo, the apache user (www-data) needs to be added to the group of the executables' group.
– Kasper Agg
Dec 9 '18 at 14:48
But the sbin folder requires sudo rights too and the shutdown command in this folder works from the website, and I didn't change anything on the permissions
– Silvan
Dec 9 '18 at 14:51
But the sbin folder requires sudo rights too and the shutdown command in this folder works from the website, and I didn't change anything on the permissions
– Silvan
Dec 9 '18 at 14:51
Are all flags the same those binaries? Are they for example 777 vs 755?
– Kasper Agg
Dec 9 '18 at 14:56
Are all flags the same those binaries? Are they for example 777 vs 755?
– Kasper Agg
Dec 9 '18 at 14:56
So I changed the permissions of the /usr/bin/pactl to the exact same as /sbin/shutdown ones, still not working, the flag is now 777.
– Silvan
Dec 9 '18 at 15:10
So I changed the permissions of the /usr/bin/pactl to the exact same as /sbin/shutdown ones, still not working, the flag is now 777.
– Silvan
Dec 9 '18 at 15:10
|
show 16 more comments
My problem is solved. I'm writing files into a folder and a script checks this folder for the files and executes than the code to control the audio (I'm controlling it now with amixer instead of pactl).
Thanks for your suggestions anyway!
answered Dec 10 '18 at 14:38
Silvan
13
add a comment |
My problem is solved. I'm writing files into a folder and a script checks this folder for the files and executes than the code to control the audio (I'm controlling it now with amixer instead of pactl).
Thanks for your suggestions anyway!
answered Dec 10 '18 at 14:38
Silvan
13
add a comment |
My problem is solved. I'm writing files into a folder and a script checks this folder for the files and executes than the code to control the audio (I'm controlling it now with amixer instead of pactl).
Thanks for your suggestions anyway!
answered Dec 10 '18 at 14:38
Silvan
13
My problem is solved. I'm writing files into a folder and a script checks this folder for the files and executes than the code to control the audio (I'm controlling it now with amixer instead of pactl).
Thanks for your suggestions anyway!
answered Dec 10 '18 at 14:38
Silvan
13
answered Dec 10 '18 at 14:38
Silvan
13
answered Dec 10 '18 at 14:38
Silvan
13
answered Dec 10 '18 at 14:38
Silvan
13
13
add a comment |
add a comment |
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Is apache (typically user www-data) part of the sudoers group?
– Kasper Agg
Dec 9 '18 at 13:47
I also think you shouldn't be invoking command line commands with sudo through a webapp. Why not add www-data to the group that is allowed to execute pactl?
– Kasper Agg
Dec 9 '18 at 13:49
Okay, how can I add www-data to the execution group?
– Silvan
Dec 9 '18 at 14:01
You could try google for that: google.nl/…
– Kasper Agg
Dec 9 '18 at 14:05