sysdeps/stub/lseek.c

   1 /* Copyright (C) 1991, 1995 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 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.
   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 Library General Public License for more details.
  13
  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
  16 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  17 Cambridge, MA 02139, USA.  */
  18
  19 #include <ansidecl.h>
  20 #include <errno.h>
  21 #include <unistd.h>
  22 #include <sys/types.h>
  23
  24 /* Seek to OFFSET on FD, starting from WHENCE.  */
  25 off_t
  26 DEFUN(__lseek, (fd, offset, whence), int fd AND off_t offset AND int whence)
  27 {
  28   if (fd < 0)
  29     {
  30       errno = EBADF;
  31       return -1;
  32     }
  33   switch (whence)
  34     {
  35     case SEEK_SET:
  36     case SEEK_CUR:
  37     case SEEK_END:
  38       break;
  39     default:
  40       errno = EINVAL;
  41       return -1;
  42     }
  43
  44   errno = ENOSYS;
  45   return -1;
  46 }
  47 stub_warning (lseek)
  48
  49 weak_alias (__lseek, lseek)