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/**
* Copyright © 2014 Mattias Andrée (maandree@member.fsf.org)
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <limits.h>
#include <alloca.h>
#include <xf86drm.h>
#include <xf86drmMode.h>
#ifndef PATH_MAX
#define PATH_MAX 4096
#endif
/* Requires video group */
/**
* Get the number of cards present on the system
*
* @return The number of cards present on the system
*/
long blueshift_drm_card_count()
{
char* pathname = alloca(PATH_MAX * sizeof(char));
long len = strlen("/dev/dri/card");
long count = 0;
struct stat attr;
memcpy(pathname, "/dev/dri/card", len);
for (;;)
{
sprintf(pathname + len, "%li", count);
if (stat(pathname, &attr))
break;
count++;
}
return count;
}
int main(int argc, char** argv)
{
(void) argc;
(void) argv;
printf("%li\n", blueshift_drm_card_count());
return 0;
}
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