why is which not working?

[yusuf]

Hi,

I uploaded the following file to my site:

<?php
header("Content-type: text/plain");

echo "latex is at: ";
system("which latex");

echo "ls is at: ";
system("which ls");

echo "convert is at: ";
system("which convert");

echo "gs is at: ";
system("which gs");

?>

and none of the paths are being printed out, only the echo statements
are... I would think atleast ls should show up? Execute permissions
have been given to it too.

[Kimmo Laine]

"yusuf" <yu****@gmail.comwrote in message
news:11********************@i42g2000cwa.googlegrou ps.com...

Hi,

I uploaded the following file to my site:

<?php
header("Content-type: text/plain");

echo "latex is at: ";
system("which latex");

echo "ls is at: ";
system("which ls");

echo "convert is at: ";
system("which convert");

echo "gs is at: ";
system("which gs");

?>

and none of the paths are being printed out, only the echo statements
are... I would think atleast ls should show up? Execute permissions
have been given to it too.

Are system/exec/passthru allowed on your php? Do you get any output from any
command, say ls or uptime or something else rather trivial?

Also try something like this for debugging:

$output = system('ls', $return_val)
var_dump($output); // This will be boolean false on failure
var_dump($return_val); // This will contain the return status of the command
--
"Ohjelmoija on organismi joka muuttaa kofeiinia koodiksi" - lpk
http://outolempi.net/ahdistus/ - Satunnaisesti päivittyvä nettisarjis
sp**@outolempi.net || Gedoon-S @ IRCnet || rot13(xv***@bhgbyrzcv.arg)

[yusuf]

Also try something like this for debugging:

>
$output = system('ls', $return_val)
var_dump($output); // This will be boolean false on failure
var_dump($return_val); // This will contain the return status of the command

They are printing out:

NULL
NULL

thanks.

[Kimmo Laine]

"yusuf" <yu****@gmail.comwrote in message
news:11**********************@e3g2000cwe.googlegro ups.com...

>Also try something like this for debugging:

$output = system('ls', $return_val)
var_dump($output); // This will be boolean false on failure
var_dump($return_val); // This will contain the return status of the
command

They are printing out:

NULL
NULL

Huh, it would seem like system function is disabled, since it returns
absolutely nothing. It's a configuration issue, so which propably works just
fine, php just can't access it cos it's not allowed.

--
"Ohjelmoija on organismi joka muuttaa kofeiinia koodiksi" - lpk
http://outolempi.net/ahdistus/ - Satunnaisesti päivittyvä nettisarjis
sp**@outolempi.net || Gedoon-S @ IRCnet || rot13(xv***@bhgbyrzcv.arg)