76 lines
1.8 KiB
C
76 lines
1.8 KiB
C
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/*
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* Copyright (C) 2015-2016 Gerd Hoffmann <kraxel@redhat.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "qemu/osdep.h"
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#include "qemu/drm.h"
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#include <glob.h>
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#include <dirent.h>
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int qemu_drm_rendernode_open(const char *rendernode)
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{
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DIR *dir;
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struct dirent *e;
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struct stat st;
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int r, fd, ret;
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char *p;
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if (rendernode) {
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return open(rendernode, O_RDWR | O_CLOEXEC | O_NOCTTY | O_NONBLOCK);
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}
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dir = opendir("/dev/dri");
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if (!dir) {
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return -1;
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}
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fd = -1;
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while ((e = readdir(dir))) {
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if (strncmp(e->d_name, "renderD", 7)) {
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continue;
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}
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p = g_strdup_printf("/dev/dri/%s", e->d_name);
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r = open(p, O_RDWR | O_CLOEXEC | O_NOCTTY | O_NONBLOCK);
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if (r < 0) {
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g_free(p);
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continue;
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}
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/*
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* prefer fstat() over checking e->d_type == DT_CHR for
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* portability reasons
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*/
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ret = fstat(r, &st);
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if (ret < 0 || (st.st_mode & S_IFMT) != S_IFCHR) {
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close(r);
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g_free(p);
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continue;
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}
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fd = r;
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g_free(p);
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break;
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}
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closedir(dir);
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if (fd < 0) {
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return -1;
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}
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return fd;
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}
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