support/xlseek.c

   1 /* lseek with error checking.
   2    Copyright (C) 2017-2020 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    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <support/check.h>
  20 #include <support/xunistd.h>
  21
  22 long long
  23 xlseek (int fd, long long offset, int whence)
  24 {
  25   long long result = lseek64 (fd, offset, whence);
  26   if (result < 0)
  27     FAIL_EXIT1 ("lseek64 (%d, %lld, %d): %m", fd, offset, whence);
  28   return result;
  29 }