Marc-André Lureau | b1d3803 | 2018-07-13 15:09:06 +0200 | [diff] [blame] | 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 | |
| 23 | int qemu_drm_rendernode_open(const char *rendernode) |
| 24 | { |
| 25 | DIR *dir; |
| 26 | struct dirent *e; |
Gerd Hoffmann | 0b823cb | 2020-07-13 14:36:10 +0100 | [diff] [blame] | 27 | struct stat st; |
| 28 | int r, fd, ret; |
Marc-André Lureau | b1d3803 | 2018-07-13 15:09:06 +0200 | [diff] [blame] | 29 | char *p; |
| 30 | |
| 31 | if (rendernode) { |
| 32 | return open(rendernode, O_RDWR | O_CLOEXEC | O_NOCTTY | O_NONBLOCK); |
| 33 | } |
| 34 | |
| 35 | dir = opendir("/dev/dri"); |
| 36 | if (!dir) { |
| 37 | return -1; |
| 38 | } |
| 39 | |
| 40 | fd = -1; |
| 41 | while ((e = readdir(dir))) { |
Marc-André Lureau | b1d3803 | 2018-07-13 15:09:06 +0200 | [diff] [blame] | 42 | if (strncmp(e->d_name, "renderD", 7)) { |
| 43 | continue; |
| 44 | } |
| 45 | |
| 46 | p = g_strdup_printf("/dev/dri/%s", e->d_name); |
| 47 | |
| 48 | r = open(p, O_RDWR | O_CLOEXEC | O_NOCTTY | O_NONBLOCK); |
| 49 | if (r < 0) { |
| 50 | g_free(p); |
| 51 | continue; |
| 52 | } |
Gerd Hoffmann | 0b823cb | 2020-07-13 14:36:10 +0100 | [diff] [blame] | 53 | |
| 54 | /* |
| 55 | * prefer fstat() over checking e->d_type == DT_CHR for |
| 56 | * portability reasons |
| 57 | */ |
| 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; |
| 63 | } |
| 64 | |
Marc-André Lureau | b1d3803 | 2018-07-13 15:09:06 +0200 | [diff] [blame] | 65 | fd = r; |
| 66 | g_free(p); |
| 67 | break; |
| 68 | } |
| 69 | |
| 70 | closedir(dir); |
| 71 | if (fd < 0) { |
| 72 | return -1; |
| 73 | } |
| 74 | return fd; |
| 75 | } |