fdo-mirrors/dbus
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/dbus/dbus.git synced 2025-12-27 02:10:11 +01:00
Code Issues Projects Releases Packages Wiki Activity Actions
dbus/bus/activation.c
Havoc Pennington cfa261b49d 2003-04-01 Havoc Pennington <hp@redhat.com> 
* bus/config-parser.c, bus/bus.c: implement <servicedir> and
	<includedir> (at least mostly)

	* dbus/dbus-sysdeps.c (_dbus_change_identity): set the group ID
	first, then the user ID
2003-04-02 00:29:33 +00:00

611 lines
15 KiB
C
Raw Blame History

/* -*- mode: C; c-file-style: "gnu" -*- */
/* activation.c Activation of services
*
* Copyright (C) 2003 CodeFactory AB
*
* Licensed under the Academic Free License version 1.2
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include "activation.h"
#include "desktop-file.h"
#include "services.h"
#include "utils.h"
#include <dbus/dbus-internals.h>
#include <dbus/dbus-hash.h>
#include <dbus/dbus-list.h>
#include <sys/types.h>
#include <dirent.h>
#include <errno.h>
#define DBUS_SERVICE_SECTION "D-BUS Service"
#define DBUS_SERVICE_NAME "Name"
#define DBUS_SERVICE_EXEC "Exec"
struct BusActivation
{
int refcount;
DBusHashTable *entries;
DBusHashTable *pending_activations;
char *server_address;
BusContext *context;
};
typedef struct
{
char *name;
char *exec;
} BusActivationEntry;
typedef struct BusPendingActivationEntry BusPendingActivationEntry;
struct BusPendingActivationEntry
{
DBusMessage *activation_message;
DBusConnection *connection;
};
typedef struct
{
char *service_name;
DBusList *entries;
} BusPendingActivation;
static void
bus_pending_activation_entry_free (BusPendingActivationEntry *entry)
{
if (entry->activation_message)
dbus_message_unref (entry->activation_message);
if (entry->connection)
dbus_connection_unref (entry->connection);
dbus_free (entry);
}
static void
bus_pending_activation_free (BusPendingActivation *activation)
{
DBusList *link;
if (!activation)
return;
dbus_free (activation->service_name);
link = _dbus_list_get_first_link (&activation->entries);
while (link != NULL)
{
BusPendingActivationEntry *entry = link->data;
bus_pending_activation_entry_free (entry);
link = _dbus_list_get_next_link (&activation->entries, link);
}
_dbus_list_clear (&activation->entries);
dbus_free (activation);
}
static void
bus_activation_entry_free (BusActivationEntry *entry)
{
if (!entry)
return;
dbus_free (entry->name);
dbus_free (entry->exec);
}
static dbus_bool_t
add_desktop_file_entry (BusActivation *activation,
BusDesktopFile *desktop_file,
DBusError *error)
{
char *name, *exec;
BusActivationEntry *entry;
_DBUS_ASSERT_ERROR_IS_CLEAR (error);
name = NULL;
exec = NULL;
entry = NULL;
if (!bus_desktop_file_get_string (desktop_file,
DBUS_SERVICE_SECTION,
DBUS_SERVICE_NAME,
&name))
{
dbus_set_error (error, DBUS_ERROR_FAILED,
"No \""DBUS_SERVICE_NAME"\" key in .service file\n");
goto failed;
}
if (!bus_desktop_file_get_string (desktop_file,
DBUS_SERVICE_SECTION,
DBUS_SERVICE_EXEC,
&exec))
{
dbus_set_error (error, DBUS_ERROR_FAILED,
"No \""DBUS_SERVICE_EXEC"\" key in .service file\n");
goto failed;
}
/* FIXME we need a better-defined algorithm for which service file to
* pick than "whichever one is first in the directory listing"
*/
if (_dbus_hash_table_lookup_string (activation->entries, name))
{
dbus_set_error (error, DBUS_ERROR_FAILED,
"Service %s already exists in activation entry list\n", name);
goto failed;
}
entry = dbus_new0 (BusActivationEntry, 1);
if (entry == NULL)
{
BUS_SET_OOM (error);
goto failed;
}
entry->name = name;
entry->exec = exec;
if (!_dbus_hash_table_insert_string (activation->entries, entry->name, entry))
{
BUS_SET_OOM (error);
goto failed;
}
_dbus_verbose ("Added \"%s\" to list of services\n", entry->name);
return TRUE;
failed:
dbus_free (name);
dbus_free (exec);
dbus_free (entry);
return FALSE;
}
/* warning: this doesn't fully "undo" itself on failure, i.e. doesn't strip
* hash entries it already added.
*/
static dbus_bool_t
load_directory (BusActivation *activation,
const char *directory,
DBusError *error)
{
DBusDirIter *iter;
DBusString dir, filename;
DBusString full_path;
BusDesktopFile *desktop_file;
DBusError tmp_error;
_DBUS_ASSERT_ERROR_IS_CLEAR (error);
_dbus_string_init_const (&dir, directory);
iter = NULL;
desktop_file = NULL;
if (!_dbus_string_init (&filename))
{
BUS_SET_OOM (error);
return FALSE;
}
if (!_dbus_string_init (&full_path))
{
BUS_SET_OOM (error);
_dbus_string_free (&filename);
return FALSE;
}
/* from this point it's safe to "goto failed" */
iter = _dbus_directory_open (&dir, error);
if (iter == NULL)
{
_dbus_verbose ("Failed to open directory %s: %s\n",
directory, error ? error->message : "unknown");
goto failed;
}
/* Now read the files */
dbus_error_init (&tmp_error);
while (_dbus_directory_get_next_file (iter, &filename, &tmp_error))
{
_dbus_assert (!dbus_error_is_set (&tmp_error));
_dbus_string_set_length (&full_path, 0);
if (!_dbus_string_append (&full_path, directory) ||
!_dbus_concat_dir_and_file (&full_path, &filename))
{
BUS_SET_OOM (error);
goto failed;
}
if (!_dbus_string_ends_with_c_str (&filename, ".service"))
{
_dbus_verbose ("Skipping non-.service file %s\n",
_dbus_string_get_const_data (&filename));
continue;
}
desktop_file = bus_desktop_file_load (&full_path, &tmp_error);
if (desktop_file == NULL)
{
_dbus_verbose ("Could not load %s: %s\n",
_dbus_string_get_const_data (&full_path),
tmp_error.message);
if (dbus_error_has_name (&tmp_error, DBUS_ERROR_NO_MEMORY))
{
dbus_move_error (&tmp_error, error);
goto failed;
}
dbus_error_free (&tmp_error);
continue;
}
if (!add_desktop_file_entry (activation, desktop_file, &tmp_error))
{
bus_desktop_file_free (desktop_file);
desktop_file = NULL;
_dbus_verbose ("Could not add %s to activation entry list: %s\n",
_dbus_string_get_const_data (&full_path), tmp_error.message);
if (dbus_error_has_name (&tmp_error, DBUS_ERROR_NO_MEMORY))
{
dbus_move_error (&tmp_error, error);
goto failed;
}
dbus_error_free (&tmp_error);
continue;
}
else
{
bus_desktop_file_free (desktop_file);
desktop_file = NULL;
continue;
}
}
if (dbus_error_is_set (&tmp_error))
{
dbus_move_error (&tmp_error, error);
goto failed;
}
return TRUE;
failed:
_DBUS_ASSERT_ERROR_IS_SET (error);
if (iter != NULL)
_dbus_directory_close (iter);
if (desktop_file)
bus_desktop_file_free (desktop_file);
_dbus_string_free (&filename);
_dbus_string_free (&full_path);
return FALSE;
}
BusActivation*
bus_activation_new (BusContext *context,
const DBusString *address,
DBusList **directories,
DBusError *error)
{
BusActivation *activation;
DBusList *link;
_DBUS_ASSERT_ERROR_IS_CLEAR (error);
activation = dbus_new0 (BusActivation, 1);
if (activation == NULL)
{
BUS_SET_OOM (error);
return NULL;
}
activation->refcount = 1;
activation->context = context;
if (!_dbus_string_copy_data (address, &activation->server_address))
{
BUS_SET_OOM (error);
goto failed;
}
activation->entries = _dbus_hash_table_new (DBUS_HASH_STRING, NULL,
(DBusFreeFunction)bus_activation_entry_free);
if (activation->entries == NULL)
{
BUS_SET_OOM (error);
goto failed;
}
activation->pending_activations = _dbus_hash_table_new (DBUS_HASH_STRING, NULL,
(DBusFreeFunction)bus_pending_activation_free);
if (activation->pending_activations == NULL)
{
BUS_SET_OOM (error);
goto failed;
}
/* Load service files */
link = _dbus_list_get_first_link (directories);
while (link != NULL)
{
if (!load_directory (activation, link->data, error))
goto failed;
link = _dbus_list_get_next_link (directories, link);
}
return activation;
failed:
bus_activation_unref (activation);
return NULL;
}
void
bus_activation_ref (BusActivation *activation)
{
_dbus_assert (activation->refcount > 0);
activation->refcount += 1;
}
void
bus_activation_unref (BusActivation *activation)
{
_dbus_assert (activation->refcount > 0);
activation->refcount -= 1;
if (activation->refcount == 0)
{
dbus_free (activation->server_address);
if (activation->entries)
_dbus_hash_table_unref (activation->entries);
if (activation->pending_activations)
_dbus_hash_table_unref (activation->pending_activations);
dbus_free (activation);
}
}
static void
child_setup (void *data)
{
BusActivation *activation = data;
/* If no memory, we simply have the child exit, so it won't try
* to connect to the wrong thing.
*/
if (!_dbus_setenv ("DBUS_ADDRESS", activation->server_address))
_dbus_exit (1);
}
dbus_bool_t
bus_activation_service_created (BusActivation *activation,
const char *service_name,
DBusError *error)
{
BusPendingActivation *pending_activation;
DBusMessage *message;
DBusList *link;
_DBUS_ASSERT_ERROR_IS_CLEAR (error);
/* Check if it's a pending activation */
pending_activation = _dbus_hash_table_lookup_string (activation->pending_activations, service_name);
if (!pending_activation)
return TRUE;
link = _dbus_list_get_first_link (&pending_activation->entries);
while (link != NULL)
{
BusPendingActivationEntry *entry = link->data;
DBusList *next = _dbus_list_get_next_link (&pending_activation->entries, link);
if (dbus_connection_get_is_connected (entry->connection))
{
message = dbus_message_new_reply (entry->activation_message);
if (!message)
{
BUS_SET_OOM (error);
goto error;
}
if (!dbus_message_append_args (message,
DBUS_TYPE_UINT32, DBUS_ACTIVATION_REPLY_ACTIVATED,
0))
{
dbus_message_unref (message);
BUS_SET_OOM (error);
goto error;
}
if (!dbus_connection_send (entry->connection, message, NULL))
{
dbus_message_unref (message);
BUS_SET_OOM (error);
goto error;
}
}
bus_pending_activation_entry_free (entry);
_dbus_list_remove_link (&pending_activation->entries, link);
link = next;
}
_dbus_hash_table_remove_string (activation->pending_activations, service_name);
return TRUE;
error:
_dbus_hash_table_remove_string (activation->pending_activations, service_name);
return FALSE;
}
dbus_bool_t
bus_activation_activate_service (BusActivation *activation,
DBusConnection *connection,
DBusMessage *activation_message,
const char *service_name,
DBusError *error)
{
BusActivationEntry *entry;
BusPendingActivation *pending_activation;
BusPendingActivationEntry *pending_activation_entry;
DBusMessage *message;
DBusString service_str;
char *argv[2];
dbus_bool_t retval;
_DBUS_ASSERT_ERROR_IS_CLEAR (error);
entry = _dbus_hash_table_lookup_string (activation->entries, service_name);
if (!entry)
{
dbus_set_error (error, DBUS_ERROR_ACTIVATE_SERVICE_NOT_FOUND,
"The service %s was not found in the activation entry list",
service_name);
return FALSE;
}
/* Check if the service is active */
_dbus_string_init_const (&service_str, service_name);
if (bus_registry_lookup (bus_context_get_registry (activation->context), &service_str) != NULL)
{
message = dbus_message_new_reply (activation_message);
if (!message)
{
BUS_SET_OOM (error);
return FALSE;
}
if (!dbus_message_append_args (message,
DBUS_TYPE_UINT32, DBUS_ACTIVATION_REPLY_ALREADY_ACTIVE,
0))
{
BUS_SET_OOM (error);
dbus_message_unref (message);
return FALSE;
}
retval = dbus_connection_send (connection, message, NULL);
dbus_message_unref (message);
if (!retval)
BUS_SET_OOM (error);
return retval;
}
pending_activation_entry = dbus_new0 (BusPendingActivationEntry, 1);
if (!pending_activation_entry)
{
BUS_SET_OOM (error);
return FALSE;
}
pending_activation_entry->activation_message = activation_message;
dbus_message_ref (activation_message);
pending_activation_entry->connection = connection;
dbus_connection_ref (connection);
/* Check if the service is being activated */
pending_activation = _dbus_hash_table_lookup_string (activation->pending_activations, service_name);
if (pending_activation)
{
if (!_dbus_list_append (&pending_activation->entries, pending_activation_entry))
{
BUS_SET_OOM (error);
bus_pending_activation_entry_free (pending_activation_entry);
return FALSE;
}
}
else
{
pending_activation = dbus_new0 (BusPendingActivation, 1);
if (!pending_activation)
{
BUS_SET_OOM (error);
bus_pending_activation_entry_free (pending_activation_entry);
return FALSE;
}
pending_activation->service_name = _dbus_strdup (service_name);
if (!pending_activation->service_name)
{
BUS_SET_OOM (error);
bus_pending_activation_free (pending_activation);
bus_pending_activation_entry_free (pending_activation_entry);
return FALSE;
}
if (!_dbus_list_append (&pending_activation->entries, pending_activation_entry))
{
BUS_SET_OOM (error);
bus_pending_activation_free (pending_activation);
bus_pending_activation_entry_free (pending_activation_entry);
return FALSE;
}
if (!_dbus_hash_table_insert_string (activation->pending_activations,
pending_activation->service_name, pending_activation))
{
BUS_SET_OOM (error);
bus_pending_activation_free (pending_activation);
return FALSE;
}
}
/* FIXME we need to support a full command line, not just a single
* argv[0]
*/
/* Now try to spawn the process */
argv[0] = entry->exec;
argv[1] = NULL;
if (!_dbus_spawn_async (argv,
child_setup, activation,
error))
{
_dbus_hash_table_remove_string (activation->pending_activations,
pending_activation->service_name);
return FALSE;
}
return TRUE;
}
Reference in a new issue View git blame Copy permalink