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- /* _hurd_socket_server - Find the server for a socket domain.
-
- Copyright (C) 1991, 1992 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 Library General Public License as
- published by the Free Software Foundation; either version 2 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
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public
- License along with the GNU C Library; see the file COPYING.LIB. If
- not, write to the Free Software Foundation, Inc., 675 Mass Ave,
- Cambridge, MA 02139, USA. */
-
- #include <hurd.h>
- #include <sys/socket.h>
- #include <gnu-stabs.h>
-
- static struct mutex lock;
- static void
- init_sock (void)
- {
- __mutex_init (&lock);
- }
- text_set_element (__libc_subinit, init_sock);
-
- static file_t sockdir = MACH_PORT_NULL;
- static file_t *servers;
- static int max_domain;
-
- /* Return a port to the socket server for DOMAIN.
- Socket servers translate nodes in the directory _SERVERS_SOCKET
- (canonically /servers/socket). These naming point nodes are named
- by the simplest decimal representation of the socket domain number,
- for example "/servers/socket/3".
-
- Socket servers are assumed not to change very often.
- The library keeps all the server socket ports it has ever looked up,
- and does not look them up in /servers/socket more than once. */
-
- socket_t
- _hurd_socket_server (int domain)
- {
- error_t err;
-
- __mutex_lock (&lock);
-
- if (sockdir == MACH_PORT_NULL)
- {
- sockdir = __path_lookup (_SERVERS_SOCKET, FS_LOOKUP_EXEC, 0);
- if (sockdir == MACH_PORT_NULL)
- {
- __mutex_unlock (&lock);
- return MACH_PORT_NULL;
- }
- }
-
- if (domain > max_domain)
- {
- file_t *new = realloc (servers, (domain + 1) * sizeof (file_t));
- if (new == NULL)
- {
- __mutex_unlock (&lock);
- return MACH_PORT_NULL;
- }
- while (max_domain < domain)
- new[max_domain++] = MACH_PORT_NULL;
- servers = new;
- }
-
- {
- char name[100];
- sprintf (name, "%d", domain);
- if (err = _HURD_PORT_USE (&_hurd_crdir,
- __hurd_path_lookup (port, sockdir,
- name, 0, 0,
- &servers[domain])))
- errno = err;
- }
-
- __mutex_unlock (&lock);
-
- return servers[domain];
- }
-