Le 12/03/2011 07:57, Jess nous fit lire :
> Le_Forgeron <jgr### [at] freefr> wrote:
>> Le 11/03/2011 21:57, Jess nous fit lire :
>>> I didn't try turning off the display until today, but that also didn't work.
>>>
>>>
>> How does "povray --benchmark" perform from your webserver/php ?
>> (and directly from command line ?)
> 
> The benchmark render took 22 minutes to complete from the command line, but
> didn't work at all from PHP (running it with system still gives me a return
> value of 1, which I found out is a generic error code).
> 
> 

Ok, time to switch povray for a hello_world program then.
(i.e. write & compile a hello_world program, and get it called from
shell then php/webserver.
 1. Does it work the same ? (does it fail the same way ?)
 2. second level debugging: add more printf in the the hello program to
display:
 * all the arguments/parameter (including argv[0]),
 * process id ( getpid() )
 * user id (both real & effective : getuid(), geteuid() )
 * current directory ( getcwd() or get_current_dir_name() )
 * perform some i/o operation on the disk (like opendir("/tmp"), and
display all entries ? compare with actual content of /tmp)

Something like that:
-----------------------

#include <sys/types.h>
#include <dirent.h>

int main(int argc,char**argv)
{
	int ii;
	DIR* tmpdir;
	struct dirent *entry;
	printf("Hello, world\n");
	for(ii=0;ii<argc;ii++)
	{
		printf("arg %d : \"%s\"\n",ii,argv[ii]);
	}
	printf("This is pid %d\n",getpid());
	printf("Run as user %d (effective %d)\n",getuid(),geteuid());
printf("The current directory is : %s\n",get_current_dir_name());
	tmpdir=opendir("/tmp");
	printf("Opendir /tmp returned: %p\n",tmpdir);
	if (tmpdir)
	{
		do
		{
			entry = readdir(tmpdir);
			if (entry)
			{
				printf("Filename %s\n",entry->d_name);
			}
		} while (entry);
		ii=closedir(tmpdir);
		printf("Closedir returned %d\n",ii);
	}
	return 0;
}

----------------

Post a reply to this message