1b1d38037SMarc-André Lureau /*
2b1d38037SMarc-André Lureau * Copyright (C) 2015-2016 Gerd Hoffmann <kraxel@redhat.com>
3b1d38037SMarc-André Lureau *
4b1d38037SMarc-André Lureau * This library is free software; you can redistribute it and/or
5b1d38037SMarc-André Lureau * modify it under the terms of the GNU Lesser General Public
6b1d38037SMarc-André Lureau * License as published by the Free Software Foundation; either
7b1d38037SMarc-André Lureau * version 2.1 of the License, or (at your option) any later version.
8b1d38037SMarc-André Lureau *
9b1d38037SMarc-André Lureau * This library is distributed in the hope that it will be useful,
10b1d38037SMarc-André Lureau * but WITHOUT ANY WARRANTY; without even the implied warranty of
11b1d38037SMarc-André Lureau * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12b1d38037SMarc-André Lureau * Lesser General Public License for more details.
13b1d38037SMarc-André Lureau *
14b1d38037SMarc-André Lureau * You should have received a copy of the GNU Lesser General Public
15b1d38037SMarc-André Lureau * License along with this library; if not, see <http://www.gnu.org/licenses/>.
16b1d38037SMarc-André Lureau */
17b1d38037SMarc-André Lureau #include "qemu/osdep.h"
18b1d38037SMarc-André Lureau #include "qemu/drm.h"
19b1d38037SMarc-André Lureau
20b1d38037SMarc-André Lureau #include <glob.h>
21b1d38037SMarc-André Lureau #include <dirent.h>
22b1d38037SMarc-André Lureau
qemu_drm_rendernode_open(const char * rendernode)23b1d38037SMarc-André Lureau int qemu_drm_rendernode_open(const char *rendernode)
24b1d38037SMarc-André Lureau {
25b1d38037SMarc-André Lureau DIR *dir;
26b1d38037SMarc-André Lureau struct dirent *e;
27*0b823cb0SGerd Hoffmann struct stat st;
28*0b823cb0SGerd Hoffmann int r, fd, ret;
29b1d38037SMarc-André Lureau char *p;
30b1d38037SMarc-André Lureau
31b1d38037SMarc-André Lureau if (rendernode) {
32b1d38037SMarc-André Lureau return open(rendernode, O_RDWR | O_CLOEXEC | O_NOCTTY | O_NONBLOCK);
33b1d38037SMarc-André Lureau }
34b1d38037SMarc-André Lureau
35b1d38037SMarc-André Lureau dir = opendir("/dev/dri");
36b1d38037SMarc-André Lureau if (!dir) {
37b1d38037SMarc-André Lureau return -1;
38b1d38037SMarc-André Lureau }
39b1d38037SMarc-André Lureau
40b1d38037SMarc-André Lureau fd = -1;
41b1d38037SMarc-André Lureau while ((e = readdir(dir))) {
42b1d38037SMarc-André Lureau if (strncmp(e->d_name, "renderD", 7)) {
43b1d38037SMarc-André Lureau continue;
44b1d38037SMarc-André Lureau }
45b1d38037SMarc-André Lureau
46b1d38037SMarc-André Lureau p = g_strdup_printf("/dev/dri/%s", e->d_name);
47b1d38037SMarc-André Lureau
48b1d38037SMarc-André Lureau r = open(p, O_RDWR | O_CLOEXEC | O_NOCTTY | O_NONBLOCK);
49b1d38037SMarc-André Lureau if (r < 0) {
50b1d38037SMarc-André Lureau g_free(p);
51b1d38037SMarc-André Lureau continue;
52b1d38037SMarc-André Lureau }
53*0b823cb0SGerd Hoffmann
54*0b823cb0SGerd Hoffmann /*
55*0b823cb0SGerd Hoffmann * prefer fstat() over checking e->d_type == DT_CHR for
56*0b823cb0SGerd Hoffmann * portability reasons
57*0b823cb0SGerd Hoffmann */
58*0b823cb0SGerd Hoffmann ret = fstat(r, &st);
59*0b823cb0SGerd Hoffmann if (ret < 0 || (st.st_mode & S_IFMT) != S_IFCHR) {
60*0b823cb0SGerd Hoffmann close(r);
61*0b823cb0SGerd Hoffmann g_free(p);
62*0b823cb0SGerd Hoffmann continue;
63*0b823cb0SGerd Hoffmann }
64*0b823cb0SGerd Hoffmann
65b1d38037SMarc-André Lureau fd = r;
66b1d38037SMarc-André Lureau g_free(p);
67b1d38037SMarc-André Lureau break;
68b1d38037SMarc-André Lureau }
69b1d38037SMarc-André Lureau
70b1d38037SMarc-André Lureau closedir(dir);
71b1d38037SMarc-André Lureau if (fd < 0) {
72b1d38037SMarc-André Lureau return -1;
73b1d38037SMarc-André Lureau }
74b1d38037SMarc-André Lureau return fd;
75b1d38037SMarc-André Lureau }
76