1/* xmknod call using old-style Unix mknod system call.
2 Copyright (C) 1991-2020 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
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
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <errno.h>
20#include <sys/types.h>
21#include <sys/stat.h>
22#include <sys/sysmacros.h>
23
24#include <sysdep.h>
25#include <sys/syscall.h>
26
27/* Create a device file named PATH, with permission and special bits MODE
28 and device number DEV (which can be constructed from major and minor
29 device numbers with the `makedev' macro above). */
30int
31__xmknod (int vers, const char *path, mode_t mode, dev_t *dev)
32{
33 unsigned long long int k_dev;
34
35 if (vers != _MKNOD_VER)
36 return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);
37
38 /* We must convert the value to dev_t type used by the kernel. */
39 k_dev = (*dev) & ((1ULL << 32) - 1);
40 if (k_dev != *dev)
41 return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);
42
43 return INLINE_SYSCALL (mknod, 3, path, mode, (unsigned int) k_dev);
44}
45
46weak_alias (__xmknod, _xmknod)
47libc_hidden_def (__xmknod)
48