sysdeps/stub/lseek.c

   1 /* Copyright (C) 1991, 1995, 1996 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 <errno.h>
  20 #include <unistd.h>
  21 #include <sys/types.h>
  22
  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;
  29 {
  30   if (fd < 0)
  31     {
  32       __set_errno (EBADF);
  33       return -1;
  34     }
  35   switch (whence)
  36     {
  37     case SEEK_SET:
  38     case SEEK_CUR:
  39     case SEEK_END:
  40       break;
  41     default:
  42       __set_errno (EINVAL);
  43       return -1;
  44     }
  45
  46   __set_errno (ENOSYS);
  47   return -1;
  48 }
  49 stub_warning (lseek)
  50
  51 weak_alias (__lseek, lseek)