Back to index

glibc  2.9
recv.c
Go to the documentation of this file.
00001 /* Copyright (C) 1994,1997,2001,2005 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003 
00004    The GNU C Library is free software; you can redistribute it and/or
00005    modify it under the terms of the GNU Lesser General Public
00006    License as published by the Free Software Foundation; either
00007    version 2.1 of the License, or (at your option) any later version.
00008 
00009    The GNU C Library is distributed in the hope that it will be useful,
00010    but WITHOUT ANY WARRANTY; without even the implied warranty of
00011    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012    Lesser General Public License for more details.
00013 
00014    You should have received a copy of the GNU Lesser General Public
00015    License along with the GNU C Library; if not, write to the Free
00016    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00017    02111-1307 USA.  */
00018 
00019 #include <errno.h>
00020 #include <sys/socket.h>
00021 #include <hurd.h>
00022 #include <hurd/fd.h>
00023 #include <hurd/socket.h>
00024 #include <string.h>
00025 
00026 /* Read N bytes into BUF from socket FD.
00027    Returns the number read or -1 for errors.  */
00028 
00029 ssize_t
00030 __recv (fd, buf, n, flags)
00031      int fd;
00032      void *buf;
00033      size_t n;
00034      int flags;
00035 {
00036   error_t err;
00037   mach_port_t addrport;
00038   char *bufp = buf;
00039   mach_msg_type_number_t nread = n;
00040   mach_port_t *ports;
00041   mach_msg_type_number_t nports = 0;
00042   char *cdata = NULL;
00043   mach_msg_type_number_t clen = 0;
00044 
00045   if (err = HURD_DPORT_USE (fd, __socket_recv (port, &addrport,
00046                                           flags, &bufp, &nread,
00047                                           &ports, &nports,
00048                                           &cdata, &clen,
00049                                           &flags,
00050                                           n)))
00051     return __hurd_sockfail (fd, flags, err);
00052 
00053   __mach_port_deallocate (__mach_task_self (), addrport);
00054   __vm_deallocate (__mach_task_self (), (vm_address_t) cdata, clen);
00055 
00056   if (bufp != buf)
00057     {
00058       memcpy (buf, bufp, nread);
00059       __vm_deallocate (__mach_task_self (), (vm_address_t) bufp, nread);
00060     }
00061 
00062   return nread;
00063 }
00064 weak_alias (__recv, recv)