1/* Copyright (C) 2005-2020 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library 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 GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18#include <errno.h>
19#include <fcntl.h>
20#include <stdio.h>
21#include <string.h>
22#include <sys/types.h>
23#include <sys/stat.h>
24#include <sys/sysmacros.h>
25
26#include <sysdep.h>
27#include <sys/syscall.h>
28
29
30/* Create a device file named PATH relative to FD, with permission and
31 special bits MODE and device number DEV (which can be constructed
32 from major and minor device numbers with the `makedev' macro above). */
33int
34__xmknodat (int vers, int fd, const char *file, mode_t mode, dev_t *dev)
35{
36 if (vers != _MKNOD_VER)
37 return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);
38
39 /* We must convert the value to dev_t type used by the kernel. */
40 unsigned long long int k_dev = (*dev) & ((1ULL << 32) - 1);
41 if (k_dev != *dev)
42 return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);
43
44 return INLINE_SYSCALL (mknodat, 4, fd, file, mode, (unsigned int) k_dev);
45}
46
47libc_hidden_def (__xmknodat)
48