1/*
2 * Copyright (C) 2015-2016 Gerd Hoffmann <kraxel@redhat.com>
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
16 */
17#include "qemu/osdep.h"
18#include "qemu/drm.h"
19
20#include <glob.h>
21#include <dirent.h>
22
23int qemu_drm_rendernode_open(const char *rendernode)
24{
25 DIR *dir;
26 struct dirent *e;
27 int r, fd;
28 char *p;
29
30 if (rendernode) {
31 return open(rendernode, O_RDWR | O_CLOEXEC | O_NOCTTY | O_NONBLOCK);
32 }
33
34 dir = opendir("/dev/dri");
35 if (!dir) {
36 return -1;
37 }
38
39 fd = -1;
40 while ((e = readdir(dir))) {
41 if (e->d_type != DT_CHR) {
42 continue;
43 }
44
45 if (strncmp(e->d_name, "renderD", 7)) {
46 continue;
47 }
48
49 p = g_strdup_printf("/dev/dri/%s", e->d_name);
50
51 r = open(p, O_RDWR | O_CLOEXEC | O_NOCTTY | O_NONBLOCK);
52 if (r < 0) {
53 g_free(p);
54 continue;
55 }
56 fd = r;
57 g_free(p);
58 break;
59 }
60
61 closedir(dir);
62 if (fd < 0) {
63 return -1;
64 }
65 return fd;
66}
67