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Old 09-01-2011, 12:48 PM   #1
pbeau
LQ Newbie
 
Registered: May 2011
Location: London UK
Distribution: Debian
Posts: 12

Rep: Reputation: Disabled
Executing script from php.


Hi ... I am trying to execute this:
PHP Code:
$musque='notempty';
while (
$musque == 'notempty')
{
// Play next file in que    
$query "select * from musplay order by idx limit 1";

$result = @mysql_query($query); 
if (
mysql_num_rows($result) == 0)
    {
        
$musque='empty';
        exit();
    }
        while (
$row mysql_fetch_array($result))
        { 

        
$CMD '/usr/bin/mpg123 -q /home/xfer/Music/'.$row['filen'];
        echo 
$CMD;
        
exec($CMD); 
In essence this script (it is cut short) should run as a process and is started via:
PHP Code:
include ('funclib.php');
$substr "./mus_Player.php&";
$output shell_exec($substr);
echo 
$output;
//$dum = mus_dispque(); 
the echo confirms the mpg123 command is received and formatted correctly - it just doesn't do anything!. If I cut and paste the result into a (non-root) tty, it executes as expected. Anyone can give me a hint as to why this won't execute in the LAMP environment? Note.. the rest of the script (not shown) executes fine - it is just the mpg command that echos but doers nothing other than a short delay.

Thanks for any hints

Paul
 
Old 09-01-2011, 01:51 PM   #2
Tinkster
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Registered: Apr 2002
Location: in a fallen world
Distribution: slackware by choice, others too :} ... android.
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Educated guess: apache doesn't have access to the music files?


Cheers,
Tink
 
1 members found this post helpful.
Old 09-01-2011, 02:07 PM   #3
pbeau
LQ Newbie
 
Registered: May 2011
Location: London UK
Distribution: Debian
Posts: 12

Original Poster
Rep: Reputation: Disabled
Tink,
Thanks for the response. Your guess is undoutably better (or at least more educated) than mine. This is a private system - no public access - so if I chmod all the files to 777 is that the easiest way to test that theory? I'd rather not just wholesale change things without some understanding.

Much appreciated

Paul
 
Old 09-03-2011, 02:41 AM   #4
pbeau
LQ Newbie
 
Registered: May 2011
Location: London UK
Distribution: Debian
Posts: 12

Original Poster
Rep: Reputation: Disabled
Update - changed a file to 777 and got the same result. I don't pretend to understand the security settings on files other than setting it too 777 is effective;ly 'all access'. As this is not a publicly exposed system, I'm not to concerned about inadvertently opening up holes. Thanks for the suggestion... any other ideas?
 
Old 09-03-2011, 02:58 PM   #5
Tinkster
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Registered: Apr 2002
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Distribution: slackware by choice, others too :} ... android.
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Have you looked at apache's logs (access/error) at all?
 
1 members found this post helpful.
Old 09-03-2011, 04:17 PM   #6
zunder1990
LQ Newbie
 
Registered: Feb 2011
Posts: 29

Rep: Reputation: 3
SELinux

If you are using Redhat based linux, you will need to deal with selinux. To fix selinux look here at step 5 http://wiki.centos.org/HowTos/SELinux.
 
1 members found this post helpful.
Old 09-04-2011, 07:20 AM   #7
pbeau
LQ Newbie
 
Registered: May 2011
Location: London UK
Distribution: Debian
Posts: 12

Original Poster
Rep: Reputation: Disabled
Thanks for the responses. Tink: I should have checked this before ... the request to start the player completes successfully (200) - as expected as other commands in the script work ok. zunder 1990: It is Umbutu ... it is the 64 Studio distribution (V 2.x) that I added the lampp package into. at the risk of revealing the true depth of my ignorance: For design reasons, the calling script attempts to start the player (in php) with
PHP Code:
$substr "./mus_Player.php&";
$output shell_exec($substr); 
Within the called script teh player starts with
PHP Code:
$CMD '/usr/bin/mpg123 -q /home/xfer/Music/'.$row['filen'];
        echo 
$CMD;
        
exec($CMD); 
In other OSes I am more familiar with, calling a script within a script like this increases 'depth' and there are limits to this....could I be hitting something similar in linix? now that the obvious is eliminated , I am going to have to explore the unlikely. Thanks for the help.
 
  


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