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. */
23 ssize_t
__libc_pwrite64(int fd,const void * buf,size_t nbytes,off64_t offset)24 __libc_pwrite64 (int fd, const void *buf, size_t nbytes, off64_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 }
42 strong_alias (__libc_pwrite64, __pwrite64)
43 libc_hidden_def (__pwrite64)
44 weak_alias (__libc_pwrite64, pwrite64)
45 stub_warning (pwrite64)
46