293 lines
8.4 KiB
C
293 lines
8.4 KiB
C
/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
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/* dbus-server-unix.c Server implementation for Unix network protocols.
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*
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* Copyright (C) 2002, 2003, 2004 Red Hat Inc.
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*
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* Licensed under the Academic Free License version 2.1
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#include <config.h>
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#include "dbus-internals.h"
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#include "dbus-server-unix.h"
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#include "dbus-server-socket.h"
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#include "dbus-server-launchd.h"
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#include "dbus-transport-unix.h"
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#include "dbus-connection-internal.h"
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#include "dbus-sysdeps-unix.h"
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#include "dbus-string.h"
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/**
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* @defgroup DBusServerUnix DBusServer implementations for UNIX
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* @ingroup DBusInternals
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* @brief Implementation details of DBusServer on UNIX
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*
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* @{
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*/
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/**
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* Tries to interpret the address entry in a platform-specific
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* way, creating a platform-specific server type if appropriate.
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* Sets error if the result is not OK.
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*
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* @param entry an address entry
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* @param server_p location to store a new DBusServer, or #NULL on failure.
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* @param error location to store rationale for failure on bad address
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* @returns the outcome
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*
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*/
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DBusServerListenResult
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_dbus_server_listen_platform_specific (DBusAddressEntry *entry,
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DBusServer **server_p,
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DBusError *error)
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{
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const char *method;
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*server_p = NULL;
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method = dbus_address_entry_get_method (entry);
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if (strcmp (method, "unix") == 0)
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{
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const char *path = dbus_address_entry_get_value (entry, "path");
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const char *tmpdir = dbus_address_entry_get_value (entry, "tmpdir");
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const char *abstract = dbus_address_entry_get_value (entry, "abstract");
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if (path == NULL && tmpdir == NULL && abstract == NULL)
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{
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_dbus_set_bad_address(error, "unix",
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"path or tmpdir or abstract",
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NULL);
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return DBUS_SERVER_LISTEN_BAD_ADDRESS;
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}
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if ((path && tmpdir) ||
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(path && abstract) ||
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(tmpdir && abstract))
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{
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_dbus_set_bad_address(error, NULL, NULL,
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"cannot specify two of \"path\" and \"tmpdir\" and \"abstract\" at the same time");
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return DBUS_SERVER_LISTEN_BAD_ADDRESS;
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}
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if (tmpdir != NULL)
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{
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DBusString full_path;
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DBusString filename;
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if (!_dbus_string_init (&full_path))
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{
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dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
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return DBUS_SERVER_LISTEN_DID_NOT_CONNECT;
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}
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if (!_dbus_string_init (&filename))
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{
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_dbus_string_free (&full_path);
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dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
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return DBUS_SERVER_LISTEN_DID_NOT_CONNECT;
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}
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if (!_dbus_string_append (&filename,
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"dbus-") ||
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!_dbus_generate_random_ascii (&filename, 10) ||
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!_dbus_string_append (&full_path, tmpdir) ||
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!_dbus_concat_dir_and_file (&full_path, &filename))
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{
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_dbus_string_free (&full_path);
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_dbus_string_free (&filename);
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dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
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return DBUS_SERVER_LISTEN_DID_NOT_CONNECT;
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}
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/* Always use abstract namespace if possible with tmpdir */
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*server_p =
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_dbus_server_new_for_domain_socket (_dbus_string_get_const_data (&full_path),
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#ifdef HAVE_ABSTRACT_SOCKETS
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TRUE,
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#else
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FALSE,
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#endif
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error);
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_dbus_string_free (&full_path);
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_dbus_string_free (&filename);
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}
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else
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{
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if (path)
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*server_p = _dbus_server_new_for_domain_socket (path, FALSE, error);
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else
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*server_p = _dbus_server_new_for_domain_socket (abstract, TRUE, error);
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}
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if (*server_p != NULL)
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{
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_DBUS_ASSERT_ERROR_IS_CLEAR(error);
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return DBUS_SERVER_LISTEN_OK;
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}
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else
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{
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_DBUS_ASSERT_ERROR_IS_SET(error);
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return DBUS_SERVER_LISTEN_DID_NOT_CONNECT;
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}
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}
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else if (strcmp (method, "systemd") == 0)
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{
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int n, *fds;
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DBusString address;
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n = _dbus_listen_systemd_sockets (&fds, error);
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if (n < 0)
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{
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_DBUS_ASSERT_ERROR_IS_SET (error);
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return DBUS_SERVER_LISTEN_DID_NOT_CONNECT;
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}
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_dbus_string_init_const (&address, "systemd:");
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*server_p = _dbus_server_new_for_socket (fds, n, &address, NULL);
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if (*server_p == NULL)
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{
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int i;
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for (i = 0; i < n; i++)
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{
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_dbus_close_socket (fds[i], NULL);
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}
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dbus_free (fds);
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dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
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return DBUS_SERVER_LISTEN_DID_NOT_CONNECT;
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}
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dbus_free (fds);
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return DBUS_SERVER_LISTEN_OK;
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}
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#ifdef DBUS_ENABLE_LAUNCHD
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else if (strcmp (method, "launchd") == 0)
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{
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const char *launchd_env_var = dbus_address_entry_get_value (entry, "env");
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if (launchd_env_var == NULL)
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{
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_dbus_set_bad_address (error, "launchd", "env", NULL);
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return DBUS_SERVER_LISTEN_DID_NOT_CONNECT;
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}
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*server_p = _dbus_server_new_for_launchd (launchd_env_var, error);
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if (*server_p != NULL)
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{
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_DBUS_ASSERT_ERROR_IS_CLEAR(error);
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return DBUS_SERVER_LISTEN_OK;
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}
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else
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{
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_DBUS_ASSERT_ERROR_IS_SET(error);
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return DBUS_SERVER_LISTEN_DID_NOT_CONNECT;
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}
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}
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#endif
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else
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{
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/* If we don't handle the method, we return NULL with the
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* error unset
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*/
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_DBUS_ASSERT_ERROR_IS_CLEAR(error);
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return DBUS_SERVER_LISTEN_NOT_HANDLED;
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}
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}
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/**
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* Creates a new server listening on the given Unix domain socket.
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*
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* @param path the path for the domain socket.
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* @param abstract #TRUE to use abstract socket namespace
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* @param error location to store reason for failure.
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* @returns the new server, or #NULL on failure.
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*/
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DBusServer*
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_dbus_server_new_for_domain_socket (const char *path,
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dbus_bool_t abstract,
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DBusError *error)
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{
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DBusServer *server;
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int listen_fd;
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DBusString address;
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char *path_copy;
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DBusString path_str;
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_DBUS_ASSERT_ERROR_IS_CLEAR (error);
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if (!_dbus_string_init (&address))
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{
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dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
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return NULL;
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}
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_dbus_string_init_const (&path_str, path);
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if ((abstract &&
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!_dbus_string_append (&address, "unix:abstract=")) ||
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(!abstract &&
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!_dbus_string_append (&address, "unix:path=")) ||
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!_dbus_address_append_escaped (&address, &path_str))
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{
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dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
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goto failed_0;
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}
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path_copy = _dbus_strdup (path);
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if (path_copy == NULL)
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{
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dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
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goto failed_0;
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}
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listen_fd = _dbus_listen_unix_socket (path, abstract, error);
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if (listen_fd < 0)
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{
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_DBUS_ASSERT_ERROR_IS_SET (error);
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goto failed_1;
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}
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server = _dbus_server_new_for_socket (&listen_fd, 1, &address, 0);
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if (server == NULL)
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{
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dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
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goto failed_2;
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}
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_dbus_server_socket_own_filename(server, path_copy);
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_dbus_string_free (&address);
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return server;
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failed_2:
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_dbus_close_socket (listen_fd, NULL);
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failed_1:
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dbus_free (path_copy);
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failed_0:
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_dbus_string_free (&address);
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return NULL;
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}
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/** @} */
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