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d614a753 | 1 | /* Copyright (C) 2011-2020 Free Software Foundation, Inc. |
a63c7fa1 CM |
2 | This file is part of the GNU C Library. |
3 | Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011. | |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
ab84e3ff | 16 | License along with the GNU C Library. If not, see |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
a63c7fa1 CM |
18 | |
19 | #include <errno.h> | |
20 | #include <fcntl.h> | |
21 | #include <sys/types.h> | |
22 | #include <sys/stat.h> | |
23 | #include <sys/sysmacros.h> | |
24 | ||
25 | #include <sysdep.h> | |
26 | #include <sys/syscall.h> | |
27 | ||
28 | /* Create a device file named PATH, with permission and special bits MODE | |
29 | and device number DEV (which can be constructed from major and minor | |
30 | device numbers with the `makedev' macro above). */ | |
31 | int | |
32 | __xmknod (int vers, const char *path, mode_t mode, dev_t *dev) | |
33 | { | |
34 | unsigned long long int k_dev; | |
35 | ||
36 | if (vers != _MKNOD_VER) | |
37 | { | |
38 | __set_errno (EINVAL); | |
39 | return -1; | |
40 | } | |
41 | ||
42 | /* We must convert the value to dev_t type used by the kernel. */ | |
43 | k_dev = (*dev) & ((1ULL << 32) - 1); | |
44 | if (k_dev != *dev) | |
45 | { | |
46 | __set_errno (EINVAL); | |
47 | return -1; | |
48 | } | |
49 | ||
50 | return INLINE_SYSCALL (mknodat, 4, AT_FDCWD, path, mode, | |
51 | (unsigned int) k_dev); | |
52 | } | |
53 | weak_alias (__xmknod, _xmknod) | |
54 | libc_hidden_def (__xmknod) |