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[glibc.git] / sysdeps / generic / lseek.c
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1 /* Copyright (C) 1991, 1995, 1996, 1997 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 Library General Public License as
6 published by the Free Software Foundation; either version 2 of the
7 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 Library General Public License for more details.
14 You should have received a copy of the GNU Library General Public
15 License along with the GNU C Library; see the file COPYING.LIB. If not,
16 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 Boston, MA 02111-1307, USA. */
19 #include <errno.h>
20 #include <unistd.h>
21 #include <sys/types.h>
23 /* Seek to OFFSET on FD, starting from WHENCE. */
24 off_t
25 __lseek (fd, offset, whence)
26 int fd;
27 off_t offset;
28 int whence;
30 if (fd < 0)
32 __set_errno (EBADF);
33 return -1;
35 switch (whence)
37 case SEEK_SET:
38 case SEEK_CUR:
39 case SEEK_END:
40 break;
41 default:
42 __set_errno (EINVAL);
43 return -1;
46 __set_errno (ENOSYS);
47 return -1;
49 stub_warning (lseek)
51 weak_alias (__lseek, lseek)
52 #include <stub-tag.h>