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Sparky1's questions

Martin Hope
Sparky1
Asked: 2011-11-16 13:21:53 +0800 CST
  • 0

I have a shell script 'vlc.sh' that plays a video using vlc:

#!/bin/bash
vlc /home/sparky/sample.mp4

When I run this script from my login, I get audio + video.

When I call this script from the Apache user (via php), I get only video. The Apache error log complains about audio:

[0x96053ec] pulse audio output error: cannot connect to server: Connection refused
ALSA lib confmisc.c:768:(parse_card) cannot find card '0'
ALSA lib conf.c:4184:(_snd_config_evaluate) function snd_func_card_driver returned error: 
No such file or directory
oss audio output error: cannot open audio device (/dev/dsp)

I've tried adding the apache user to the audio, pulse, pulse-access, and admin groups. But I've have had no luck. I'm running xubuntu 11.10. What should I try next?

sound
Martin Hope
Sparky1
Asked: 2011-11-16 10:21:54 +0800 CST
  • 800

I want to add the Apache user (www-data) to the audio group. I've read the man page for useradd, but I'm not having any luck. I'm running xubuntu 11.10. Here's what I'm doing:

$ sudo useradd -G audio www-data
useradd: user 'www-data' already exists

If I leave out the -G option, bash, prints the help info for useradd:

$ sudo useradd  audio www-data
Usage: useradd [options] LOGIN
Options: -b, --base-dir BASE_DIR       base directory for the home directory...

It's not clear to me from the man page what options I should use to make this work.

users
Martin Hope
Sparky1
Asked: 2011-11-09 14:12:28 +0800 CST
  • 2

I'm running xubuntu 11.10. From php, I'm calling a shell that exports the display and then calls wmctrl. Every time I call wmctrl, I see an error "Cannot open display".

I call my shell from php:

$output = shell_exec('/var/www/wmctrl.sh');

My hostname is steven-Z-CLASS

Here is my shell script:

#!/bin/bash
export DISPLAY=steven-Z-CLASS:0.0
echo $DISPLAY
wmctrl -m

When I run this, I see the echoed display value in my php page:

steven-Z-CLASS:0.0

However, wmctl does not run. I see this error in the apache log:

Cannot open display.

Any ideas why wmctrl can't open the display?

xorg
Martin Hope
Sparky1
Asked: 2011-11-08 13:15:01 +0800 CST
  • 3

I'm running ubuntu 11.10. I want to be able to call a shell script from php and run that script as root. When my php attempts to call the shell script as root --like this: 

$output = shell_exec('sudo /var/www/my_script.sh')

I get this error in the apache log:

sudo: no tty present and no askpass program specified

I've changed the owner of the php script to root:root. I've added this line to sudoers: 

www-data ALL = NOPASSWD:/var/www/my_script.php

I realize that I'm supposed to comment out this line in sudoers:

Defaults    requiretty

However, there's no such line in my sudoers file. What do I need to do to get past this error?

command-line