Hello all
I have trouble in calling POVRay through PHP.
This is what I tried:
- create a PHP file (say call.php) with the content
<?php
header("Content-Type: image/png");
passthru("./xxx.cgi");
?>
- have the following in xxx.cgi
#!/bin/bash
/usr/local/bin/povray +O- myfirst.pov 2> /tmp/errors.txt
which supposedly send the picture to stdin in PNG format.
Result:
The browser displays "The image http://.../call.php cannot be
displayed, because it contains errors."
The access_log records a status 200 line, error_log contains
"./xxx.cgi: line 2: 27809 segmentaion fault /usr/local/bin/povray \
+O- myfirst.pov 2> /tmp/errors.txt"
and /tmp/errors.txt is empty.
Executing ./xxx.cgi on the command line, works as expected:
a binary is sent to the screen, /tmp/errors.txt contains the
usual POVRay log.
The obvious mistake of not having privileges is IMHO solved.
a) I can do "su - nobody" (Apache runs as nobody:nogroup) and
execute xxx.cgi, it works.
b) I've changed the user:group of Apache process to be myself
(normaluser:use rs). It didn't help.
Why POVRay behaves differently if called from PHP is a puzzle.
Just as a control experiment I tried this:
change call.php to
<?php
header("Content-Type: text/html");
passthru("./xxx.cgi");
?>
and have a xxx.cgi like
#!/bin/bash
/usr/bin/pod2html /usr/doc/openssl-0.9.6d/doc/crypto/rc4.pod
It works properly, i.e. I get the formatted HTML version of rc4.pod.
Can somebody explanation this?
Arun
