d6170d27b2
The idea is to unify the way that devices can be specified.
50 lines
1.6 KiB
C
50 lines
1.6 KiB
C
/*
|
|
* Copyright (C) 2008-2009 Kay Sievers <kay@vrfy.org>
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program 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 General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "udevadm-util.h"
|
|
|
|
struct udev_device *find_device(struct udev *udev,
|
|
const char *id,
|
|
const char *prefix) {
|
|
|
|
assert(udev);
|
|
assert(id);
|
|
|
|
if (prefix && !startswith(id, prefix))
|
|
id = strappenda(prefix, id);
|
|
|
|
if (startswith(id, "/dev/")) {
|
|
struct stat statbuf;
|
|
char type;
|
|
|
|
if (stat(id, &statbuf) < 0)
|
|
return NULL;
|
|
|
|
if (S_ISBLK(statbuf.st_mode))
|
|
type = 'b';
|
|
else if (S_ISCHR(statbuf.st_mode))
|
|
type = 'c';
|
|
else
|
|
return NULL;
|
|
|
|
return udev_device_new_from_devnum(udev, type, statbuf.st_rdev);
|
|
} else if (startswith(id, "/sys/"))
|
|
return udev_device_new_from_syspath(udev, id);
|
|
else
|
|
return NULL;
|
|
}
|