/* Copyright (C) 1994,95,96,97,99,2001,02 Free Software Foundation, Inc.   This file is part of the GNU C Library.   The GNU C Library is free software; you can redistribute it and/or   modify it under the terms of the GNU Lesser General Public   License as published by the Free Software Foundation; either   version 2.1 of the License, or (at your option) any later version.   The GNU C Library is distributed in the hope that it will be useful,   but WITHOUT ANY WARRANTY; without even the implied warranty of   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU   Lesser General Public License for more details.   You should have received a copy of the GNU Lesser General Public   License along with the GNU C Library; if not, write to the Free   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA   02111-1307 USA.  */#include <errno.h>#include <sys/socket.h>#include <sys/un.h>#include <hurd.h>#include <hurd/fd.h>#include <hurd/ifsock.h>#include <hurd/socket.h>/* Send N bytes of BUF on socket FD to peer at address ADDR (which is   ADDR_LEN bytes long).  Returns the number sent, or -1 for errors.  */ssize_t__sendto (int fd,	  const void *buf,	  size_t n,	  int flags,	  const struct sockaddr_un *addr,	  socklen_t addr_len){  addr_port_t aport;  error_t err;  size_t wrote;  if (addr->sun_family == AF_LOCAL)    {      /* For the local domain, we must look up the name as a file and talk	 to it with the ifsock protocol.  */      file_t file = __file_name_lookup (addr->sun_path, 0, 0);      if (file == MACH_PORT_NULL)	return -1;      err = __ifsock_getsockaddr (file, &aport);      __mach_port_deallocate (__mach_task_self (), file);      if (err == MIG_BAD_ID || err == EOPNOTSUPP)	/* The file did not grok the ifsock protocol.  */	err = ENOTSOCK;      if (err)	return __hurd_fail (err);    }  else    err = EIEIO;  /* Get an address port for the desired destination address.  */  err = HURD_DPORT_USE (fd,			({			  if (err)			    err = __socket_create_address (port,							   addr->sun_family,							   (char *) addr,							   addr_len,							   &aport);			  if (! err)			    {			      /* Send the data.  */			      err = __socket_send (port, aport,						   flags, buf, n,						   NULL,						   MACH_MSG_TYPE_COPY_SEND, 0,						   NULL, 0, &wrote);			      __mach_port_deallocate (__mach_task_self (),						      aport);			    }			  err;			}));  return err ? __hurd_dfail (fd, err) : wrote;}weak_alias (__sendto, sendto)