91 lines
2.5 KiB
C
91 lines
2.5 KiB
C
/* _hurd_socket_server - Find the server for a socket domain.
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Copyright (C) 1991, 1992 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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#include <hurd.h>
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#include <sys/socket.h>
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#include <gnu-stabs.h>
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static struct mutex lock;
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static void
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init_sock (void)
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{
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__mutex_init (&lock);
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}
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text_set_element (__libc_subinit, init_sock);
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static file_t sockdir = MACH_PORT_NULL;
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static file_t *servers;
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static int max_domain;
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/* Return a port to the socket server for DOMAIN.
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Socket servers translate nodes in the directory _SERVERS_SOCKET
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(canonically /servers/socket). These naming point nodes are named
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by the simplest decimal representation of the socket domain number,
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for example "/servers/socket/3".
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Socket servers are assumed not to change very often.
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The library keeps all the server socket ports it has ever looked up,
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and does not look them up in /servers/socket more than once. */
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socket_t
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_hurd_socket_server (int domain)
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{
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error_t err;
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__mutex_lock (&lock);
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if (sockdir == MACH_PORT_NULL)
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{
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sockdir = __path_lookup (_SERVERS_SOCKET, FS_LOOKUP_EXEC, 0);
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if (sockdir == MACH_PORT_NULL)
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{
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__mutex_unlock (&lock);
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return MACH_PORT_NULL;
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}
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}
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if (domain > max_domain)
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{
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file_t *new = realloc (servers, (domain + 1) * sizeof (file_t));
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if (new == NULL)
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{
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__mutex_unlock (&lock);
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return MACH_PORT_NULL;
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}
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while (max_domain < domain)
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new[max_domain++] = MACH_PORT_NULL;
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servers = new;
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}
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{
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char name[100];
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sprintf (name, "%d", domain);
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if (err = _HURD_PORT_USE (&_hurd_crdir,
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__hurd_path_lookup (port, sockdir,
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name, 0, 0,
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&servers[domain])))
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errno = err;
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}
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__mutex_unlock (&lock);
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return servers[domain];
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}
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