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/*
* 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;
}
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