* malloc/hooks.c (top_check): Force hook value into register.
[glibc.git] / posix / pread.c
blob5c79dd526dd7028ee02587a7e0c016cc85fc912d
1 /* Copyright (C) 1991, 1995, 1996, 1997, 1999 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
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.
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.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, write to the Free
16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
17 02111-1307 USA. */
19 #include <errno.h>
20 #include <unistd.h>
22 /* Read NBYTES into BUF from FD at the given position OFFSET without
23 changing the file pointer. Return the number read or -1. */
24 ssize_t
25 __libc_pread (int fd, void *buf, size_t nbytes, off_t offset)
27 if (nbytes == 0)
28 return 0;
29 if (fd < 0)
31 __set_errno (EBADF);
32 return -1;
34 if (buf == NULL || offset < 0)
36 __set_errno (EINVAL);
37 return -1;
40 __set_errno (ENOSYS);
41 return -1;
43 strong_alias (__libc_pread, __pread)
44 weak_alias (__libc_pread, pread)
45 stub_warning (pread)
46 #include <stub-tag.h>