/* * Copyright (C) 2015-2016 Gerd Hoffmann <kraxel@redhat.com> * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, see <http://www.gnu.org/licenses/>. */ #include "qemu/osdep.h" #include "qemu/drm.h" #include <glob.h> #include <dirent.h> int qemu_drm_rendernode_open(const char *rendernode) { DIR *dir; struct dirent *e; struct stat st; int r, fd, ret; char *p; if (rendernode) { return open(rendernode, O_RDWR | O_CLOEXEC | O_NOCTTY | O_NONBLOCK); } dir = opendir("/dev/dri"); if (!dir) { return -1; } fd = -1; while ((e = readdir(dir))) { if (strncmp(e->d_name, "renderD", 7)) { continue; } p = g_strdup_printf("/dev/dri/%s", e->d_name); r = open(p, O_RDWR | O_CLOEXEC | O_NOCTTY | O_NONBLOCK); if (r < 0) { g_free(p); continue; } /* * prefer fstat() over checking e->d_type == DT_CHR for * portability reasons */ ret = fstat(r, &st); if (ret < 0 || (st.st_mode & S_IFMT) != S_IFCHR) { close(r); g_free(p); continue; } fd = r; g_free(p); break; } closedir(dir); if (fd < 0) { return -1; } return fd; }