sysdeps/mach/hurd/send.c

   1 /* Copyright (C) 1994-2020 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 Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the 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    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #include <errno.h>
  19 #include <sys/socket.h>
  20 #include <hurd.h>
  21 #include <hurd/socket.h>
  22 #include <hurd/fd.h>
  23 #include <sysdep-cancel.h>
  24
  25 /* Send N bytes of BUF to socket FD.  Returns the number sent or -1.  */
  26 ssize_t
  27 __send (int fd, const void *buf, size_t n, int flags)
  28 {
  29   error_t err;
  30   size_t wrote;
  31   int cancel_oldtype;
  32
  33   cancel_oldtype = LIBC_CANCEL_ASYNC();
  34   err = HURD_DPORT_USE_CANCEL (fd, __socket_send (port, MACH_PORT_NULL,
  35                                                   flags, buf, n,
  36                                                   NULL, MACH_MSG_TYPE_COPY_SEND, 0,
  37                                                   NULL, 0, &wrote));
  38   LIBC_CANCEL_RESET (cancel_oldtype);
  39
  40   if (err == MIG_BAD_ID || err == EOPNOTSUPP)
  41     /* The file did not grok the socket protocol.  */
  42     err = ENOTSOCK;
  43
  44   return err ? __hurd_sockfail (fd, flags, err) : wrote;
  45 }
  46 libc_hidden_def (__send)
  47 weak_alias (__send, send)