sysdeps/mach/hurd/recv.c

   1 /* Copyright (C) 1994-2014 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    <http://www.gnu.org/licenses/>.  */
  17
  18 #include <errno.h>
  19 #include <sys/socket.h>
  20 #include <hurd.h>
  21 #include <hurd/fd.h>
  22 #include <hurd/socket.h>
  23 #include <string.h>
  24
  25 /* Read N bytes into BUF from socket FD.
  26    Returns the number read or -1 for errors.  */
  27
  28 ssize_t
  29 __recv (fd, buf, n, flags)
  30      int fd;
  31      void *buf;
  32      size_t n;
  33      int flags;
  34 {
  35   error_t err;
  36   mach_port_t addrport;
  37   char *bufp = buf;
  38   mach_msg_type_number_t nread = n;
  39   mach_port_t *ports;
  40   mach_msg_type_number_t nports = 0;
  41   char *cdata = NULL;
  42   mach_msg_type_number_t clen = 0;
  43
  44   if (err = HURD_DPORT_USE (fd, __socket_recv (port, &addrport,
  45                                                flags, &bufp, &nread,
  46                                                &ports, &nports,
  47                                                &cdata, &clen,
  48                                                &flags,
  49                                                n)))
  50     return __hurd_sockfail (fd, flags, err);
  51
  52   __mach_port_deallocate (__mach_task_self (), addrport);
  53   __vm_deallocate (__mach_task_self (), (vm_address_t) cdata, clen);
  54
  55   if (bufp != buf)
  56     {
  57       memcpy (buf, bufp, nread);
  58       __vm_deallocate (__mach_task_self (), (vm_address_t) bufp, nread);
  59     }
  60
  61   return nread;
  62 }
  63 weak_alias (__recv, recv)