1/* Copyright (C) 1991-2022 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 <unistd.h>
20
21/* Write NBYTES of BUF to FD at given position OFFSET without changing
22 the file position. Return the number written, or -1. */
23ssize_t
24__libc_pwrite (int fd, const void *buf, size_t nbytes, off_t offset)
25{
26 if (nbytes == 0)
27 return 0;
28 if (fd < 0)
29 {
30 __set_errno (EBADF);
31 return -1;
32 }
33 if (buf == NULL || offset < 0)
34 {
35 __set_errno (EINVAL);
36 return -1;
37 }
38
39 __set_errno (ENOSYS);
40 return -1;
41}
42strong_alias (__libc_pwrite, __pwrite)
43weak_alias (__libc_pwrite, pwrite)
44stub_warning (pwrite)
45

source code of glibc/posix/pwrite.c