mirror of https://gitee.com/openkylin/qemu.git
76 lines
1.8 KiB
C
76 lines
1.8 KiB
C
|
/*
|
||
|
|
* 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;
|
||
|
|
}
|