hurd/fd-write.c

   1 /* _hurd_fd_write -- write to a file descriptor; handles job control et al.
   2 Copyright (C) 1993, 1994, 1995 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 Library General Public License as
   7 published by the Free Software Foundation; either version 2 of the
   8 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 Library General Public License for more details.
  14
  15 You should have received a copy of the GNU Library General Public
  16 License along with the GNU C Library; see the file COPYING.LIB.  If
  17 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  18 Cambridge, MA 02139, USA.  */
  19
  20 #include <errno.h>
  21 #include <unistd.h>
  22 #include <hurd.h>
  23 #include <hurd/fd.h>
  24
  25 error_t
  26 _hurd_fd_write (struct hurd_fd *fd, const void *buf, size_t *nbytes)
  27 {
  28   error_t err;
  29   mach_msg_type_number_t wrote;
  30
  31   error_t writefd (io_t port)
  32     {
  33       return __io_write (port, buf, *nbytes, -1, &wrote);
  34     }
  35
  36   err = HURD_FD_PORT_USE (fd, _hurd_ctty_output (port, ctty, writefd));
  37
  38   if (! err)
  39     *nbytes = wrote;
  40
  41   return err;
  42 }