Merge tag 'v6.2.0-rc2'
[qemu/ar7.git] / util / drm.c
blobdae8ffebc811672810ff0e8fb0e37bc805692ba5
1 /*
2 * Copyright (C) 2015-2016 Gerd Hoffmann <kraxel@redhat.com>
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.
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.
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/>.
17 #include "qemu/osdep.h"
18 #include "qemu/drm.h"
20 #include <glob.h>
21 #include <dirent.h>
23 int qemu_drm_rendernode_open(const char *rendernode)
25 DIR *dir;
26 struct dirent *e;
27 struct stat st;
28 int r, fd, ret;
29 char *p;
31 if (rendernode) {
32 return open(rendernode, O_RDWR | O_CLOEXEC | O_NOCTTY | O_NONBLOCK);
35 dir = opendir("/dev/dri");
36 if (!dir) {
37 return -1;
40 fd = -1;
41 while ((e = readdir(dir))) {
42 if (strncmp(e->d_name, "renderD", 7)) {
43 continue;
46 p = g_strdup_printf("/dev/dri/%s", e->d_name);
48 r = open(p, O_RDWR | O_CLOEXEC | O_NOCTTY | O_NONBLOCK);
49 if (r < 0) {
50 g_free(p);
51 continue;
55 * prefer fstat() over checking e->d_type == DT_CHR for
56 * portability reasons
58 ret = fstat(r, &st);
59 if (ret < 0 || (st.st_mode & S_IFMT) != S_IFCHR) {
60 close(r);
61 g_free(p);
62 continue;
65 fd = r;
66 g_free(p);
67 break;
70 closedir(dir);
71 if (fd < 0) {
72 return -1;
74 return fd;