sysdeps/nacl/lseek.c

   1 /* lseek -- Move the file position of a file descriptor.  NaCl version.
   2    Copyright (C) 2015 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <unistd.h>
  20 #include <nacl-interfaces.h>
  21
  22
  23 /* Seek to OFFSET on FD, starting from WHENCE.  */
  24 off_t
  25 __libc_lseek (int fd, off_t offset, int whence)
  26 {
  27   off_t result;
  28   int error = __nacl_irt_fdio.seek (fd, offset, whence, &result);
  29   if (error)
  30     {
  31       __set_errno (error);
  32       return -1;
  33     }
  34   return result;
  35 }
  36 libc_hidden_def (__lseek)
  37 weak_alias (__libc_lseek, __lseek)
  38 weak_alias (__libc_lseek, lseek)
  39
  40 /* Since off64_t is the same as off_t, lseek64 is just an alias.  */
  41 weak_alias (__libc_lseek, __libc_lseek64)
  42 weak_alias (__libc_lseek, __lseek64)
  43 weak_alias (__libc_lseek, lseek64)