io/sendfile.c

   1 /* sendfile -- copy data directly from one file descriptor to another
   2    Copyright (C) 2002-2023 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 <sys/sendfile.h>
  20 #include <errno.h>
  21
  22 /* Send COUNT bytes from file associated with IN_FD starting at OFFSET to
  23    descriptor OUT_FD.  */
  24 ssize_t
  25 sendfile (int out_fd, int in_fd, off_t *offset, size_t count)
  26 {
  27   __set_errno (ENOSYS);
  28   return -1;
  29 }
  30 stub_warning (sendfile)