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d6170d27 ZJS |
1 | /* |
2 | * Copyright (C) 2008-2009 Kay Sievers <kay@vrfy.org> | |
3 | * | |
4 | * This program is free software: you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License as published by | |
6 | * the Free Software Foundation, either version 2 of the License, or | |
7 | * (at your option) any later version. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
16 | */ | |
17 | ||
07630cea | 18 | #include "string-util.h" |
d6170d27 ZJS |
19 | #include "udevadm-util.h" |
20 | ||
21 | struct udev_device *find_device(struct udev *udev, | |
22 | const char *id, | |
23 | const char *prefix) { | |
24 | ||
25 | assert(udev); | |
26 | assert(id); | |
27 | ||
28 | if (prefix && !startswith(id, prefix)) | |
63c372cb | 29 | id = strjoina(prefix, id); |
d6170d27 ZJS |
30 | |
31 | if (startswith(id, "/dev/")) { | |
32 | struct stat statbuf; | |
33 | char type; | |
34 | ||
35 | if (stat(id, &statbuf) < 0) | |
36 | return NULL; | |
37 | ||
38 | if (S_ISBLK(statbuf.st_mode)) | |
39 | type = 'b'; | |
40 | else if (S_ISCHR(statbuf.st_mode)) | |
41 | type = 'c'; | |
42 | else | |
43 | return NULL; | |
44 | ||
45 | return udev_device_new_from_devnum(udev, type, statbuf.st_rdev); | |
46 | } else if (startswith(id, "/sys/")) | |
47 | return udev_device_new_from_syspath(udev, id); | |
48 | else | |
49 | return NULL; | |
50 | } |