diff options
Diffstat (limited to 'src/3rd_party/dbus-1.7.8/bus/activation.c')
-rw-r--r-- | src/3rd_party/dbus-1.7.8/bus/activation.c | 2595 |
1 files changed, 0 insertions, 2595 deletions
diff --git a/src/3rd_party/dbus-1.7.8/bus/activation.c b/src/3rd_party/dbus-1.7.8/bus/activation.c deleted file mode 100644 index 868ce05c13..0000000000 --- a/src/3rd_party/dbus-1.7.8/bus/activation.c +++ /dev/null @@ -1,2595 +0,0 @@ -/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */ -/* activation.c Activation of services - * - * Copyright (C) 2003 CodeFactory AB - * Copyright (C) 2003 Red Hat, Inc. - * Copyright (C) 2004 Imendio HB - * - * Licensed under the Academic Free License version 2.1 - * - * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - * - */ - -#include <config.h> -#include "activation.h" -#include "activation-exit-codes.h" -#include "desktop-file.h" -#include "dispatch.h" -#include "services.h" -#include "test.h" -#include "utils.h" -#include <dbus/dbus-internals.h> -#include <dbus/dbus-hash.h> -#include <dbus/dbus-list.h> -#include <dbus/dbus-shell.h> -#include <dbus/dbus-spawn.h> -#include <dbus/dbus-timeout.h> -#include <dbus/dbus-sysdeps.h> -#ifdef HAVE_ERRNO_H -#include <errno.h> -#endif - -struct BusActivation -{ - int refcount; - DBusHashTable *entries; - DBusHashTable *pending_activations; - char *server_address; - BusContext *context; - int n_pending_activations; /**< This is in fact the number of BusPendingActivationEntry, - * i.e. number of pending activation requests, not pending - * activations per se - */ - DBusHashTable *directories; - DBusHashTable *environment; -}; - -typedef struct -{ - int refcount; - char *dir_c; - DBusHashTable *entries; -} BusServiceDirectory; - -typedef struct -{ - int refcount; - char *name; - char *exec; - char *user; - char *systemd_service; - unsigned long mtime; - BusServiceDirectory *s_dir; - char *filename; -} BusActivationEntry; - -typedef struct BusPendingActivationEntry BusPendingActivationEntry; - -struct BusPendingActivationEntry -{ - /* Normally a method call, but if connection is NULL, this is a signal - * instead. - */ - DBusMessage *activation_message; - /* NULL if this activation entry is for the dbus-daemon itself, - * waiting for systemd to start. In this case, auto_activation is always - * TRUE. - */ - DBusConnection *connection; - - dbus_bool_t auto_activation; -}; - -typedef struct -{ - int refcount; - BusActivation *activation; - char *service_name; - char *exec; - char *systemd_service; - DBusList *entries; - int n_entries; - DBusBabysitter *babysitter; - DBusTimeout *timeout; - unsigned int timeout_added : 1; -} BusPendingActivation; - -#if 0 -static BusServiceDirectory * -bus_service_directory_ref (BusServiceDirectory *dir) -{ - _dbus_assert (dir->refcount); - - dir->refcount++; - - return dir; -} -#endif - -static void -bus_service_directory_unref (BusServiceDirectory *dir) -{ - if (dir == NULL) - return; - - _dbus_assert (dir->refcount > 0); - dir->refcount--; - - if (dir->refcount > 0) - return; - - if (dir->entries) - _dbus_hash_table_unref (dir->entries); - - dbus_free (dir->dir_c); - dbus_free (dir); -} - -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 BusPendingActivation * -bus_pending_activation_ref (BusPendingActivation *pending_activation) -{ - _dbus_assert (pending_activation->refcount > 0); - pending_activation->refcount += 1; - - return pending_activation; -} - -static void -bus_pending_activation_unref (BusPendingActivation *pending_activation) -{ - DBusList *link; - - if (pending_activation == NULL) /* hash table requires this */ - return; - - _dbus_assert (pending_activation->refcount > 0); - pending_activation->refcount -= 1; - - if (pending_activation->refcount > 0) - return; - - if (pending_activation->timeout_added) - { - _dbus_loop_remove_timeout (bus_context_get_loop (pending_activation->activation->context), - pending_activation->timeout); - pending_activation->timeout_added = FALSE; - } - - if (pending_activation->timeout) - _dbus_timeout_unref (pending_activation->timeout); - - if (pending_activation->babysitter) - { - if (!_dbus_babysitter_set_watch_functions (pending_activation->babysitter, - NULL, NULL, NULL, - pending_activation->babysitter, - NULL)) - _dbus_assert_not_reached ("setting watch functions to NULL failed"); - - _dbus_babysitter_unref (pending_activation->babysitter); - } - - dbus_free (pending_activation->service_name); - dbus_free (pending_activation->exec); - dbus_free (pending_activation->systemd_service); - - link = _dbus_list_get_first_link (&pending_activation->entries); - - while (link != NULL) - { - BusPendingActivationEntry *entry = link->data; - - bus_pending_activation_entry_free (entry); - - link = _dbus_list_get_next_link (&pending_activation->entries, link); - } - _dbus_list_clear (&pending_activation->entries); - - pending_activation->activation->n_pending_activations -= - pending_activation->n_entries; - - _dbus_assert (pending_activation->activation->n_pending_activations >= 0); - - dbus_free (pending_activation); -} - -static BusActivationEntry * -bus_activation_entry_ref (BusActivationEntry *entry) -{ - _dbus_assert (entry->refcount > 0); - entry->refcount++; - - return entry; -} - -static void -bus_activation_entry_unref (BusActivationEntry *entry) -{ - if (entry == NULL) /* hash table requires this */ - return; - - _dbus_assert (entry->refcount > 0); - entry->refcount--; - - if (entry->refcount > 0) - return; - - dbus_free (entry->name); - dbus_free (entry->exec); - dbus_free (entry->user); - dbus_free (entry->filename); - dbus_free (entry->systemd_service); - - dbus_free (entry); -} - -static dbus_bool_t -update_desktop_file_entry (BusActivation *activation, - BusServiceDirectory *s_dir, - DBusString *filename, - BusDesktopFile *desktop_file, - DBusError *error) -{ - char *name, *exec, *user, *exec_tmp, *systemd_service; - BusActivationEntry *entry; - DBusStat stat_buf; - DBusString file_path; - DBusError tmp_error; - dbus_bool_t retval; - - _DBUS_ASSERT_ERROR_IS_CLEAR (error); - - retval = FALSE; - name = NULL; - exec = NULL; - user = NULL; - exec_tmp = NULL; - entry = NULL; - systemd_service = NULL; - - dbus_error_init (&tmp_error); - - if (!_dbus_string_init (&file_path)) - { - BUS_SET_OOM (error); - return FALSE; - } - - if (!_dbus_string_append (&file_path, s_dir->dir_c) || - !_dbus_concat_dir_and_file (&file_path, filename)) - { - BUS_SET_OOM (error); - goto out; - } - - if (!_dbus_stat (&file_path, &stat_buf, NULL)) - { - dbus_set_error (error, DBUS_ERROR_FAILED, - "Can't stat the service file\n"); - goto out; - } - - if (!bus_desktop_file_get_string (desktop_file, - DBUS_SERVICE_SECTION, - DBUS_SERVICE_NAME, - &name, - error)) - goto out; - - if (!bus_desktop_file_get_string (desktop_file, - DBUS_SERVICE_SECTION, - DBUS_SERVICE_EXEC, - &exec_tmp, - error)) - goto out; - - exec = _dbus_strdup (_dbus_replace_install_prefix (exec_tmp)); - dbus_free (exec_tmp); - exec_tmp = NULL; - - /* user is not _required_ unless we are using system activation */ - if (!bus_desktop_file_get_string (desktop_file, - DBUS_SERVICE_SECTION, - DBUS_SERVICE_USER, - &user, &tmp_error)) - { - _DBUS_ASSERT_ERROR_IS_SET (&tmp_error); - /* if we got OOM, then exit */ - if (dbus_error_has_name (&tmp_error, DBUS_ERROR_NO_MEMORY)) - { - dbus_move_error (&tmp_error, error); - goto out; - } - else - { - /* if we have error because we didn't find anything then continue */ - dbus_error_free (&tmp_error); - dbus_free (user); - user = NULL; - } - } - _DBUS_ASSERT_ERROR_IS_CLEAR (&tmp_error); - - /* systemd service is never required */ - if (!bus_desktop_file_get_string (desktop_file, - DBUS_SERVICE_SECTION, - DBUS_SERVICE_SYSTEMD_SERVICE, - &systemd_service, &tmp_error)) - { - _DBUS_ASSERT_ERROR_IS_SET (&tmp_error); - /* if we got OOM, then exit */ - if (dbus_error_has_name (&tmp_error, DBUS_ERROR_NO_MEMORY)) - { - dbus_move_error (&tmp_error, error); - goto out; - } - else - { - /* if we have error because we didn't find anything then continue */ - dbus_error_free (&tmp_error); - dbus_free (systemd_service); - systemd_service = NULL; - } - } - - _DBUS_ASSERT_ERROR_IS_CLEAR (&tmp_error); - - entry = _dbus_hash_table_lookup_string (s_dir->entries, - _dbus_string_get_const_data (filename)); - - if (entry == NULL) /* New file */ - { - /* 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 out; - } - - entry = dbus_new0 (BusActivationEntry, 1); - if (entry == NULL) - { - BUS_SET_OOM (error); - goto out; - } - - entry->name = name; - entry->exec = exec; - entry->user = user; - entry->systemd_service = systemd_service; - entry->refcount = 1; - - /* ownership has been transferred to entry, do not free separately */ - name = NULL; - exec = NULL; - user = NULL; - systemd_service = NULL; - - entry->s_dir = s_dir; - entry->filename = _dbus_strdup (_dbus_string_get_const_data (filename)); - if (!entry->filename) - { - BUS_SET_OOM (error); - goto out; - } - - if (!_dbus_hash_table_insert_string (activation->entries, entry->name, bus_activation_entry_ref (entry))) - { - BUS_SET_OOM (error); - goto out; - } - - if (!_dbus_hash_table_insert_string (s_dir->entries, entry->filename, bus_activation_entry_ref (entry))) - { - /* Revert the insertion in the entries table */ - _dbus_hash_table_remove_string (activation->entries, entry->name); - BUS_SET_OOM (error); - goto out; - } - - _dbus_verbose ("Added \"%s\" to list of services\n", entry->name); - } - else /* Just update the entry */ - { - bus_activation_entry_ref (entry); - _dbus_hash_table_remove_string (activation->entries, entry->name); - - if (_dbus_hash_table_lookup_string (activation->entries, name)) - { - _dbus_verbose ("The new service name \"%s\" of service file \"%s\" is already in cache, ignoring\n", - name, _dbus_string_get_const_data (&file_path)); - dbus_set_error (error, DBUS_ERROR_FAILED, - "The new service name \"%s\" of service file \"%s\" is already in cache, ignoring\n", - name, _dbus_string_get_const_data (&file_path)); - goto out; - } - - /* ownership has been transferred to entry, do not free separately */ - dbus_free (entry->name); - entry->name = name; - name = NULL; - - dbus_free (entry->exec); - entry->exec = exec; - exec = NULL; - - dbus_free (entry->user); - entry->user = user; - user = NULL; - - dbus_free (entry->systemd_service); - entry->systemd_service = systemd_service; - systemd_service = NULL; - - if (!_dbus_hash_table_insert_string (activation->entries, - entry->name, bus_activation_entry_ref(entry))) - { - BUS_SET_OOM (error); - /* Also remove path to entries hash since we want this in sync with - * the entries hash table */ - _dbus_hash_table_remove_string (entry->s_dir->entries, - entry->filename); - goto out; - } - } - - entry->mtime = stat_buf.mtime; - retval = TRUE; - -out: - /* if these have been transferred into entry, the variables will be NULL */ - dbus_free (name); - dbus_free (exec); - dbus_free (user); - dbus_free (systemd_service); - _dbus_string_free (&file_path); - - if (entry) - bus_activation_entry_unref (entry); - - return retval; -} - -static dbus_bool_t -check_service_file (BusActivation *activation, - BusActivationEntry *entry, - BusActivationEntry **updated_entry, - DBusError *error) -{ - DBusStat stat_buf; - dbus_bool_t retval; - BusActivationEntry *tmp_entry; - DBusString file_path; - DBusString filename; - - retval = TRUE; - tmp_entry = entry; - - _dbus_string_init_const (&filename, entry->filename); - - if (!_dbus_string_init (&file_path)) - { - BUS_SET_OOM (error); - return FALSE; - } - - if (!_dbus_string_append (&file_path, entry->s_dir->dir_c) || - !_dbus_concat_dir_and_file (&file_path, &filename)) - { - BUS_SET_OOM (error); - retval = FALSE; - goto out; - } - - if (!_dbus_stat (&file_path, &stat_buf, NULL)) - { - _dbus_verbose ("****** Can't stat file \"%s\", removing from cache\n", - _dbus_string_get_const_data (&file_path)); - - _dbus_hash_table_remove_string (activation->entries, entry->name); - _dbus_hash_table_remove_string (entry->s_dir->entries, entry->filename); - - tmp_entry = NULL; - retval = TRUE; - goto out; - } - else - { - if (stat_buf.mtime > entry->mtime) - { - BusDesktopFile *desktop_file; - DBusError tmp_error; - - dbus_error_init (&tmp_error); - - desktop_file = bus_desktop_file_load (&file_path, &tmp_error); - if (desktop_file == NULL) - { - _dbus_verbose ("Could not load %s: %s\n", - _dbus_string_get_const_data (&file_path), - tmp_error.message); - if (dbus_error_has_name (&tmp_error, DBUS_ERROR_NO_MEMORY)) - { - dbus_move_error (&tmp_error, error); - retval = FALSE; - goto out; - } - dbus_error_free (&tmp_error); - retval = TRUE; - goto out; - } - - /* @todo We can return OOM or a DBUS_ERROR_FAILED error - * Handle these both better - */ - if (!update_desktop_file_entry (activation, entry->s_dir, &filename, desktop_file, &tmp_error)) - { - bus_desktop_file_free (desktop_file); - if (dbus_error_has_name (&tmp_error, DBUS_ERROR_NO_MEMORY)) - { - dbus_move_error (&tmp_error, error); - retval = FALSE; - goto out; - } - dbus_error_free (&tmp_error); - retval = TRUE; - goto out; - } - - bus_desktop_file_free (desktop_file); - retval = TRUE; - } - } - -out: - _dbus_string_free (&file_path); - - if (updated_entry != NULL) - *updated_entry = tmp_entry; - return retval; -} - - -/* warning: this doesn't fully "undo" itself on failure, i.e. doesn't strip - * hash entries it already added. - */ -static dbus_bool_t -update_directory (BusActivation *activation, - BusServiceDirectory *s_dir, - DBusError *error) -{ - DBusDirIter *iter; - DBusString dir, filename; - BusDesktopFile *desktop_file; - DBusError tmp_error; - dbus_bool_t retval; - BusActivationEntry *entry; - DBusString full_path; - - _DBUS_ASSERT_ERROR_IS_CLEAR (error); - - iter = NULL; - desktop_file = NULL; - - _dbus_string_init_const (&dir, s_dir->dir_c); - - 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; - } - - retval = FALSE; - - /* from this point it's safe to "goto out" */ - - iter = _dbus_directory_open (&dir, error); - if (iter == NULL) - { - _dbus_verbose ("Failed to open directory %s: %s\n", - s_dir->dir_c, - error ? error->message : "unknown"); - goto out; - } - - /* 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_ends_with_c_str (&filename, ".service")) - { - _dbus_verbose ("Skipping non-.service file %s\n", - _dbus_string_get_const_data (&filename)); - continue; - } - - entry = _dbus_hash_table_lookup_string (s_dir->entries, _dbus_string_get_const_data (&filename)); - if (entry) /* Already has this service file in the cache */ - { - if (!check_service_file (activation, entry, NULL, error)) - goto out; - - continue; - } - - if (!_dbus_string_append (&full_path, s_dir->dir_c) || - !_dbus_concat_dir_and_file (&full_path, &filename)) - { - BUS_SET_OOM (error); - goto out; - } - - /* New file */ - 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 out; - } - - dbus_error_free (&tmp_error); - continue; - } - - /* @todo We can return OOM or a DBUS_ERROR_FAILED error - * Handle these both better - */ - if (!update_desktop_file_entry (activation, s_dir, &filename, 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 out; - } - - 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 out; - } - - retval = TRUE; - - out: - if (!retval) - _DBUS_ASSERT_ERROR_IS_SET (error); - else - _DBUS_ASSERT_ERROR_IS_CLEAR (error); - - if (iter != NULL) - _dbus_directory_close (iter); - _dbus_string_free (&filename); - _dbus_string_free (&full_path); - - return retval; -} - -static dbus_bool_t -populate_environment (BusActivation *activation) -{ - DBusString key; - DBusString value; - int i; - char **environment; - dbus_bool_t retval = FALSE; - - environment = _dbus_get_environment (); - - if (environment == NULL) - return FALSE; - - if (!_dbus_string_init (&key)) - { - dbus_free_string_array (environment); - return FALSE; - } - - if (!_dbus_string_init (&value)) - { - _dbus_string_free (&key); - dbus_free_string_array (environment); - return FALSE; - } - - for (i = 0; environment[i] != NULL; i++) - { - if (!_dbus_string_append (&key, environment[i])) - break; - - if (_dbus_string_split_on_byte (&key, '=', &value)) - { - char *hash_key, *hash_value; - - if (!_dbus_string_steal_data (&key, &hash_key)) - break; - - if (!_dbus_string_steal_data (&value, &hash_value)) - break; - - if (!_dbus_hash_table_insert_string (activation->environment, - hash_key, hash_value)) - break; - } - _dbus_string_set_length (&key, 0); - _dbus_string_set_length (&value, 0); - } - - if (environment[i] != NULL) - goto out; - - retval = TRUE; -out: - - _dbus_string_free (&key); - _dbus_string_free (&value); - dbus_free_string_array (environment); - - return retval; -} - -dbus_bool_t -bus_activation_reload (BusActivation *activation, - const DBusString *address, - DBusList **directories, - DBusError *error) -{ - DBusList *link; - char *dir; - - if (activation->server_address != NULL) - dbus_free (activation->server_address); - if (!_dbus_string_copy_data (address, &activation->server_address)) - { - BUS_SET_OOM (error); - goto failed; - } - - if (activation->entries != NULL) - _dbus_hash_table_unref (activation->entries); - activation->entries = _dbus_hash_table_new (DBUS_HASH_STRING, NULL, - (DBusFreeFunction)bus_activation_entry_unref); - if (activation->entries == NULL) - { - BUS_SET_OOM (error); - goto failed; - } - - if (activation->directories != NULL) - _dbus_hash_table_unref (activation->directories); - activation->directories = _dbus_hash_table_new (DBUS_HASH_STRING, NULL, - (DBusFreeFunction)bus_service_directory_unref); - - if (activation->directories == NULL) - { - BUS_SET_OOM (error); - goto failed; - } - - link = _dbus_list_get_first_link (directories); - while (link != NULL) - { - BusServiceDirectory *s_dir; - - dir = _dbus_strdup ((const char *) link->data); - if (!dir) - { - BUS_SET_OOM (error); - goto failed; - } - - s_dir = dbus_new0 (BusServiceDirectory, 1); - if (!s_dir) - { - dbus_free (dir); - BUS_SET_OOM (error); - goto failed; - } - - s_dir->refcount = 1; - s_dir->dir_c = dir; - - s_dir->entries = _dbus_hash_table_new (DBUS_HASH_STRING, NULL, - (DBusFreeFunction)bus_activation_entry_unref); - - if (!s_dir->entries) - { - bus_service_directory_unref (s_dir); - BUS_SET_OOM (error); - goto failed; - } - - if (!_dbus_hash_table_insert_string (activation->directories, s_dir->dir_c, s_dir)) - { - bus_service_directory_unref (s_dir); - BUS_SET_OOM (error); - goto failed; - } - - /* only fail on OOM, it is ok if we can't read the directory */ - if (!update_directory (activation, s_dir, error)) - { - if (dbus_error_has_name (error, DBUS_ERROR_NO_MEMORY)) - goto failed; - else - dbus_error_free (error); - } - - link = _dbus_list_get_next_link (directories, link); - } - - return TRUE; - failed: - return FALSE; -} - -BusActivation* -bus_activation_new (BusContext *context, - const DBusString *address, - DBusList **directories, - DBusError *error) -{ - BusActivation *activation; - - _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; - activation->n_pending_activations = 0; - - if (!bus_activation_reload (activation, address, directories, error)) - goto failed; - - /* Initialize this hash table once, we don't want to lose pending - * activations on reload. */ - activation->pending_activations = _dbus_hash_table_new (DBUS_HASH_STRING, NULL, - (DBusFreeFunction)bus_pending_activation_unref); - - if (activation->pending_activations == NULL) - { - BUS_SET_OOM (error); - goto failed; - } - - activation->environment = _dbus_hash_table_new (DBUS_HASH_STRING, - (DBusFreeFunction) dbus_free, - (DBusFreeFunction) dbus_free); - - if (activation->environment == NULL) - { - BUS_SET_OOM (error); - goto failed; - } - - if (!populate_environment (activation)) - { - BUS_SET_OOM (error); - goto failed; - } - - return activation; - - failed: - bus_activation_unref (activation); - return NULL; -} - -BusActivation * -bus_activation_ref (BusActivation *activation) -{ - _dbus_assert (activation->refcount > 0); - - activation->refcount += 1; - - return activation; -} - -void -bus_activation_unref (BusActivation *activation) -{ - _dbus_assert (activation->refcount > 0); - - activation->refcount -= 1; - - if (activation->refcount > 0) - return; - - 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); - if (activation->directories) - _dbus_hash_table_unref (activation->directories); - if (activation->environment) - _dbus_hash_table_unref (activation->environment); - - dbus_free (activation); -} - -static dbus_bool_t -add_bus_environment (BusActivation *activation, - DBusError *error) -{ - const char *type; - - if (!bus_activation_set_environment_variable (activation, - "DBUS_STARTER_ADDRESS", - activation->server_address, - error)) - return FALSE; - - type = bus_context_get_type (activation->context); - if (type != NULL) - { - if (!bus_activation_set_environment_variable (activation, - "DBUS_STARTER_BUS_TYPE", type, - error)) - return FALSE; - - if (strcmp (type, "session") == 0) - { - if (!bus_activation_set_environment_variable (activation, - "DBUS_SESSION_BUS_ADDRESS", - activation->server_address, - error)) - return FALSE; - } - else if (strcmp (type, "system") == 0) - { - if (!bus_activation_set_environment_variable (activation, - "DBUS_SYSTEM_BUS_ADDRESS", - activation->server_address, - error)) - return FALSE; - } - } - - return TRUE; -} - -typedef struct -{ - BusPendingActivation *pending_activation; - DBusPreallocatedHash *hash_entry; -} RestorePendingData; - -static void -restore_pending (void *data) -{ - RestorePendingData *d = data; - - _dbus_assert (d->pending_activation != NULL); - _dbus_assert (d->hash_entry != NULL); - - _dbus_verbose ("Restoring pending activation for service %s, has timeout = %d\n", - d->pending_activation->service_name, - d->pending_activation->timeout_added); - - _dbus_hash_table_insert_string_preallocated (d->pending_activation->activation->pending_activations, - d->hash_entry, - d->pending_activation->service_name, d->pending_activation); - - bus_pending_activation_ref (d->pending_activation); - - d->hash_entry = NULL; -} - -static void -free_pending_restore_data (void *data) -{ - RestorePendingData *d = data; - - if (d->hash_entry) - _dbus_hash_table_free_preallocated_entry (d->pending_activation->activation->pending_activations, - d->hash_entry); - - bus_pending_activation_unref (d->pending_activation); - - dbus_free (d); -} - -static dbus_bool_t -add_restore_pending_to_transaction (BusTransaction *transaction, - BusPendingActivation *pending_activation) -{ - RestorePendingData *d; - - d = dbus_new (RestorePendingData, 1); - if (d == NULL) - return FALSE; - - d->pending_activation = pending_activation; - d->hash_entry = _dbus_hash_table_preallocate_entry (d->pending_activation->activation->pending_activations); - - bus_pending_activation_ref (d->pending_activation); - - if (d->hash_entry == NULL || - !bus_transaction_add_cancel_hook (transaction, restore_pending, d, - free_pending_restore_data)) - { - free_pending_restore_data (d); - return FALSE; - } - - _dbus_verbose ("Saved pending activation to be restored if the transaction fails\n"); - - return TRUE; -} - -dbus_bool_t -bus_activation_service_created (BusActivation *activation, - const char *service_name, - BusTransaction *transaction, - 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; - - bus_context_log (activation->context, - DBUS_SYSTEM_LOG_INFO, "Successfully activated service '%s'", - service_name); - - 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); - - /* entry->connection is NULL for activating systemd */ - if (entry->connection && dbus_connection_get_is_connected (entry->connection)) - { - /* Only send activation replies to regular activation requests. */ - if (!entry->auto_activation) - { - dbus_uint32_t result; - - message = dbus_message_new_method_return (entry->activation_message); - if (!message) - { - BUS_SET_OOM (error); - goto error; - } - - result = DBUS_START_REPLY_SUCCESS; - - if (!dbus_message_append_args (message, - DBUS_TYPE_UINT32, &result, - DBUS_TYPE_INVALID)) - { - dbus_message_unref (message); - BUS_SET_OOM (error); - goto error; - } - - if (!bus_transaction_send_from_driver (transaction, entry->connection, message)) - { - dbus_message_unref (message); - BUS_SET_OOM (error); - goto error; - } - - dbus_message_unref (message); - } - } - - link = next; - } - - return TRUE; - - error: - return FALSE; -} - -dbus_bool_t -bus_activation_send_pending_auto_activation_messages (BusActivation *activation, - BusService *service, - BusTransaction *transaction, - DBusError *error) -{ - BusPendingActivation *pending_activation; - 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, - bus_service_get_name (service)); - - 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 (entry->auto_activation && (entry->connection == NULL || dbus_connection_get_is_connected (entry->connection))) - { - DBusConnection *addressed_recipient; - - addressed_recipient = bus_service_get_primary_owners_connection (service); - - /* Resume dispatching where we left off in bus_dispatch() */ - if (!bus_dispatch_matches (transaction, - entry->connection, - addressed_recipient, - entry->activation_message, error)) - goto error; - } - - link = next; - } - - if (!add_restore_pending_to_transaction (transaction, pending_activation)) - { - _dbus_verbose ("Could not add cancel hook to transaction to revert removing pending activation\n"); - BUS_SET_OOM (error); - goto error; - } - - _dbus_hash_table_remove_string (activation->pending_activations, bus_service_get_name (service)); - - return TRUE; - - error: - return FALSE; -} - -/** - * FIXME @todo the error messages here would ideally be preallocated - * so we don't need to allocate memory to send them. - * Using the usual tactic, prealloc an OOM message, then - * if we can't alloc the real error send the OOM error instead. - */ -static dbus_bool_t -try_send_activation_failure (BusPendingActivation *pending_activation, - const DBusError *how) -{ - BusActivation *activation; - DBusList *link; - BusTransaction *transaction; - - activation = pending_activation->activation; - - transaction = bus_transaction_new (activation->context); - if (transaction == NULL) - return FALSE; - - 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 (entry->connection && dbus_connection_get_is_connected (entry->connection)) - { - if (!bus_transaction_send_error_reply (transaction, - entry->connection, - how, - entry->activation_message)) - goto error; - } - - link = next; - } - - bus_transaction_execute_and_free (transaction); - - return TRUE; - - error: - if (transaction) - bus_transaction_cancel_and_free (transaction); - return FALSE; -} - -/** - * Free the pending activation and send an error message to all the - * connections that were waiting for it. - */ -static void -pending_activation_failed (BusPendingActivation *pending_activation, - const DBusError *how) -{ - /* FIXME use preallocated OOM messages instead of bus_wait_for_memory() */ - while (!try_send_activation_failure (pending_activation, how)) - _dbus_wait_for_memory (); - - /* Destroy this pending activation */ - _dbus_hash_table_remove_string (pending_activation->activation->pending_activations, - pending_activation->service_name); -} - -/** - * Depending on the exit code of the helper, set the error accordingly - */ -static void -handle_servicehelper_exit_error (int exit_code, - DBusError *error) -{ - switch (exit_code) - { - case BUS_SPAWN_EXIT_CODE_CONFIG_INVALID: - dbus_set_error (error, DBUS_ERROR_SPAWN_CONFIG_INVALID, - "Invalid configuration (missing or empty <user>?)"); - break; - case BUS_SPAWN_EXIT_CODE_NO_MEMORY: - dbus_set_error (error, DBUS_ERROR_NO_MEMORY, - "Launcher could not run (out of memory)"); - break; - case BUS_SPAWN_EXIT_CODE_SETUP_FAILED: - dbus_set_error (error, DBUS_ERROR_SPAWN_SETUP_FAILED, - "Failed to setup environment correctly"); - break; - case BUS_SPAWN_EXIT_CODE_NAME_INVALID: - dbus_set_error (error, DBUS_ERROR_SPAWN_SERVICE_INVALID, - "Bus name is not valid or missing"); - break; - case BUS_SPAWN_EXIT_CODE_SERVICE_NOT_FOUND: - dbus_set_error (error, DBUS_ERROR_SPAWN_SERVICE_NOT_FOUND, - "Bus name not found in system service directory"); - break; - case BUS_SPAWN_EXIT_CODE_PERMISSIONS_INVALID: - dbus_set_error (error, DBUS_ERROR_SPAWN_PERMISSIONS_INVALID, - "The permission of the setuid helper is not correct"); - break; - case BUS_SPAWN_EXIT_CODE_FILE_INVALID: - dbus_set_error (error, DBUS_ERROR_SPAWN_PERMISSIONS_INVALID, - "The service file is incorrect or does not have all required attributes"); - break; - case BUS_SPAWN_EXIT_CODE_EXEC_FAILED: - dbus_set_error (error, DBUS_ERROR_SPAWN_EXEC_FAILED, - "Cannot launch daemon, file not found or permissions invalid"); - break; - case BUS_SPAWN_EXIT_CODE_INVALID_ARGS: - dbus_set_error (error, DBUS_ERROR_INVALID_ARGS, - "Invalid arguments to command line"); - break; - case BUS_SPAWN_EXIT_CODE_CHILD_SIGNALED: - dbus_set_error (error, DBUS_ERROR_SPAWN_CHILD_SIGNALED, - "Launched child was signaled, it probably crashed"); - break; - case BUS_SPAWN_EXIT_CODE_GENERIC_FAILURE: - default: - dbus_set_error (error, DBUS_ERROR_SPAWN_CHILD_EXITED, - "Launch helper exited with unknown return code %i", exit_code); - break; - } -} - -static void -pending_activation_finished_cb (DBusBabysitter *babysitter, - void *data) -{ - BusPendingActivation *pending_activation = data; - dbus_bool_t uses_servicehelper; - - _dbus_assert (babysitter == pending_activation->babysitter); - _dbus_babysitter_ref (babysitter); - - /* There are two major cases here; are we the system bus or the session? Here this - * is distinguished by whether or not we use a setuid helper launcher. With the launch helper, - * some process exit codes are meaningful, processed by handle_servicehelper_exit_error. - * - * In both cases though, just ignore when a process exits with status 0; it's possible for - * a program to (misguidedly) "daemonize", and that appears to us as an exit. This closes a race - * condition between this code and the child process claiming the bus name. - */ - uses_servicehelper = bus_context_get_servicehelper (pending_activation->activation->context) != NULL; - - /* strictly speaking this is redundant with the check in dbus-spawn now */ - if (_dbus_babysitter_get_child_exited (babysitter)) - { - DBusError error; - DBusHashIter iter; - dbus_bool_t activation_failed; - int exit_code = 0; - - dbus_error_init (&error); - - _dbus_babysitter_set_child_exit_error (babysitter, &error); - - /* Explicitly check for SPAWN_CHILD_EXITED to avoid overwriting an - * exec error */ - if (dbus_error_has_name (&error, DBUS_ERROR_SPAWN_CHILD_EXITED) - && _dbus_babysitter_get_child_exit_status (babysitter, &exit_code)) - { - activation_failed = exit_code != 0; - - dbus_error_free(&error); - - if (activation_failed) - { - if (uses_servicehelper) - handle_servicehelper_exit_error (exit_code, &error); - else - _dbus_babysitter_set_child_exit_error (babysitter, &error); - } - } - else - { - activation_failed = TRUE; - } - - if (activation_failed) - { - bus_context_log (pending_activation->activation->context, - DBUS_SYSTEM_LOG_INFO, "Activated service '%s' failed: %s", - pending_activation->service_name, - error.message); - - /* Destroy all pending activations with the same exec */ - _dbus_hash_iter_init (pending_activation->activation->pending_activations, - &iter); - while (_dbus_hash_iter_next (&iter)) - { - BusPendingActivation *p = _dbus_hash_iter_get_value (&iter); - - if (p != pending_activation && strcmp (p->exec, pending_activation->exec) == 0) - pending_activation_failed (p, &error); - } - - /* Destroys the pending activation */ - pending_activation_failed (pending_activation, &error); - - dbus_error_free (&error); - } - } - - _dbus_babysitter_unref (babysitter); -} - -static dbus_bool_t -add_babysitter_watch (DBusWatch *watch, - void *data) -{ - BusPendingActivation *pending_activation = data; - - return _dbus_loop_add_watch ( - bus_context_get_loop (pending_activation->activation->context), - watch); -} - -static void -remove_babysitter_watch (DBusWatch *watch, - void *data) -{ - BusPendingActivation *pending_activation = data; - - _dbus_loop_remove_watch (bus_context_get_loop (pending_activation->activation->context), - watch); -} - -static void -toggle_babysitter_watch (DBusWatch *watch, - void *data) -{ - BusPendingActivation *pending_activation = data; - - _dbus_loop_toggle_watch (bus_context_get_loop (pending_activation->activation->context), - watch); -} - -static dbus_bool_t -pending_activation_timed_out (void *data) -{ - BusPendingActivation *pending_activation = data; - DBusError error; - - /* Kill the spawned process, since it sucks - * (not sure this is what we want to do, but - * may as well try it for now) - */ - if (pending_activation->babysitter) - _dbus_babysitter_kill_child (pending_activation->babysitter); - - dbus_error_init (&error); - - dbus_set_error (&error, DBUS_ERROR_TIMED_OUT, - "Activation of %s timed out", - pending_activation->service_name); - bus_context_log (pending_activation->activation->context, - DBUS_SYSTEM_LOG_INFO, - "Failed to activate service '%s': timed out", - pending_activation->service_name); - - pending_activation_failed (pending_activation, &error); - - dbus_error_free (&error); - - return TRUE; -} - -static void -cancel_pending (void *data) -{ - BusPendingActivation *pending_activation = data; - - _dbus_verbose ("Canceling pending activation of %s\n", - pending_activation->service_name); - - if (pending_activation->babysitter) - _dbus_babysitter_kill_child (pending_activation->babysitter); - - _dbus_hash_table_remove_string (pending_activation->activation->pending_activations, - pending_activation->service_name); -} - -static void -free_pending_cancel_data (void *data) -{ - BusPendingActivation *pending_activation = data; - - bus_pending_activation_unref (pending_activation); -} - -static dbus_bool_t -add_cancel_pending_to_transaction (BusTransaction *transaction, - BusPendingActivation *pending_activation) -{ - if (!bus_transaction_add_cancel_hook (transaction, cancel_pending, - pending_activation, - free_pending_cancel_data)) - return FALSE; - - bus_pending_activation_ref (pending_activation); - - _dbus_verbose ("Saved pending activation to be canceled if the transaction fails\n"); - - return TRUE; -} - -static dbus_bool_t -update_service_cache (BusActivation *activation, DBusError *error) -{ - DBusHashIter iter; - - _dbus_hash_iter_init (activation->directories, &iter); - while (_dbus_hash_iter_next (&iter)) - { - DBusError tmp_error; - BusServiceDirectory *s_dir; - - s_dir = _dbus_hash_iter_get_value (&iter); - - dbus_error_init (&tmp_error); - if (!update_directory (activation, s_dir, &tmp_error)) - { - if (dbus_error_has_name (&tmp_error, DBUS_ERROR_NO_MEMORY)) - { - dbus_move_error (&tmp_error, error); - return FALSE; - } - - dbus_error_free (&tmp_error); - continue; - } - } - - return TRUE; -} - -static BusActivationEntry * -activation_find_entry (BusActivation *activation, - const char *service_name, - DBusError *error) -{ - BusActivationEntry *entry; - - entry = _dbus_hash_table_lookup_string (activation->entries, service_name); - if (!entry) - { - if (!update_service_cache (activation, error)) - return NULL; - - entry = _dbus_hash_table_lookup_string (activation->entries, - service_name); - } - else - { - BusActivationEntry *updated_entry; - - if (!check_service_file (activation, entry, &updated_entry, error)) - return NULL; - - entry = updated_entry; - } - - if (!entry) - { - dbus_set_error (error, DBUS_ERROR_SERVICE_UNKNOWN, - "The name %s was not provided by any .service files", - service_name); - return NULL; - } - - return entry; -} - -static char ** -bus_activation_get_environment (BusActivation *activation) -{ - char **environment; - int i, length; - DBusString entry; - DBusHashIter iter; - - length = _dbus_hash_table_get_n_entries (activation->environment); - - environment = dbus_new0 (char *, length + 1); - - if (environment == NULL) - return NULL; - - i = 0; - _dbus_hash_iter_init (activation->environment, &iter); - - if (!_dbus_string_init (&entry)) - { - dbus_free_string_array (environment); - return NULL; - } - - while (_dbus_hash_iter_next (&iter)) - { - const char *key, *value; - - key = (const char *) _dbus_hash_iter_get_string_key (&iter); - value = (const char *) _dbus_hash_iter_get_value (&iter); - - if (!_dbus_string_append_printf (&entry, "%s=%s", key, value)) - break; - - if (!_dbus_string_steal_data (&entry, environment + i)) - break; - i++; - } - - _dbus_string_free (&entry); - - if (i != length) - { - dbus_free_string_array (environment); - environment = NULL; - } - - return environment; -} - -dbus_bool_t -bus_activation_set_environment_variable (BusActivation *activation, - const char *key, - const char *value, - DBusError *error) -{ - char *hash_key; - char *hash_value; - dbus_bool_t retval; - - retval = FALSE; - hash_key = NULL; - hash_value = NULL; - hash_key = _dbus_strdup (key); - - if (hash_key == NULL) - goto out; - - hash_value = _dbus_strdup (value); - - if (hash_value == NULL) - goto out; - - if (!_dbus_hash_table_insert_string (activation->environment, - hash_key, hash_value)) - goto out; - - retval = TRUE; -out: - if (retval == FALSE) - { - dbus_free (hash_key); - dbus_free (hash_value); - BUS_SET_OOM (error); - } - - return retval; -} - -dbus_bool_t -bus_activation_activate_service (BusActivation *activation, - DBusConnection *connection, - BusTransaction *transaction, - dbus_bool_t auto_activation, - DBusMessage *activation_message, - const char *service_name, - DBusError *error) -{ - DBusError tmp_error; - BusActivationEntry *entry; - BusPendingActivation *pending_activation; - BusPendingActivationEntry *pending_activation_entry; - DBusMessage *message; - DBusString service_str; - const char *servicehelper; - char **argv; - char **envp = NULL; - int argc; - dbus_bool_t retval; - dbus_bool_t was_pending_activation; - DBusString command; - - _DBUS_ASSERT_ERROR_IS_CLEAR (error); - - if (activation->n_pending_activations >= - bus_context_get_max_pending_activations (activation->context)) - { - dbus_set_error (error, DBUS_ERROR_LIMITS_EXCEEDED, - "The maximum number of pending activations has been reached, activation of %s failed", - service_name); - return FALSE; - } - - entry = activation_find_entry (activation, service_name, error); - if (!entry) - return FALSE; - - /* Bypass the registry lookup if we're auto-activating, bus_dispatch would not - * call us if the service is already active. - */ - if (!auto_activation) - { - /* 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) - { - dbus_uint32_t result; - - _dbus_verbose ("Service \"%s\" is already active\n", service_name); - - message = dbus_message_new_method_return (activation_message); - - if (!message) - { - _dbus_verbose ("No memory to create reply to activate message\n"); - BUS_SET_OOM (error); - return FALSE; - } - - result = DBUS_START_REPLY_ALREADY_RUNNING; - - if (!dbus_message_append_args (message, - DBUS_TYPE_UINT32, &result, - DBUS_TYPE_INVALID)) - { - _dbus_verbose ("No memory to set args of reply to activate message\n"); - BUS_SET_OOM (error); - dbus_message_unref (message); - return FALSE; - } - - retval = bus_transaction_send_from_driver (transaction, connection, message); - dbus_message_unref (message); - if (!retval) - { - _dbus_verbose ("Failed to send reply\n"); - BUS_SET_OOM (error); - } - - return retval; - } - } - - pending_activation_entry = dbus_new0 (BusPendingActivationEntry, 1); - if (!pending_activation_entry) - { - _dbus_verbose ("Failed to create pending activation entry\n"); - BUS_SET_OOM (error); - return FALSE; - } - - pending_activation_entry->auto_activation = auto_activation; - - pending_activation_entry->activation_message = activation_message; - dbus_message_ref (activation_message); - pending_activation_entry->connection = connection; - if (connection) - dbus_connection_ref (connection); - - /* Check if the service is being activated */ - pending_activation = _dbus_hash_table_lookup_string (activation->pending_activations, service_name); - was_pending_activation = (pending_activation != NULL); - if (was_pending_activation) - { - if (!_dbus_list_append (&pending_activation->entries, pending_activation_entry)) - { - _dbus_verbose ("Failed to append a new entry to pending activation\n"); - - BUS_SET_OOM (error); - bus_pending_activation_entry_free (pending_activation_entry); - return FALSE; - } - - pending_activation->n_entries += 1; - pending_activation->activation->n_pending_activations += 1; - } - else - { - pending_activation = dbus_new0 (BusPendingActivation, 1); - if (!pending_activation) - { - _dbus_verbose ("Failed to create pending activation\n"); - - BUS_SET_OOM (error); - bus_pending_activation_entry_free (pending_activation_entry); - return FALSE; - } - - pending_activation->activation = activation; - pending_activation->refcount = 1; - - pending_activation->service_name = _dbus_strdup (service_name); - if (!pending_activation->service_name) - { - _dbus_verbose ("Failed to copy service name for pending activation\n"); - - BUS_SET_OOM (error); - bus_pending_activation_unref (pending_activation); - bus_pending_activation_entry_free (pending_activation_entry); - return FALSE; - } - - pending_activation->exec = _dbus_strdup (entry->exec); - if (!pending_activation->exec) - { - _dbus_verbose ("Failed to copy service exec for pending activation\n"); - BUS_SET_OOM (error); - bus_pending_activation_unref (pending_activation); - bus_pending_activation_entry_free (pending_activation_entry); - return FALSE; - } - - if (entry->systemd_service) - { - pending_activation->systemd_service = _dbus_strdup (entry->systemd_service); - if (!pending_activation->systemd_service) - { - _dbus_verbose ("Failed to copy systemd service for pending activation\n"); - BUS_SET_OOM (error); - bus_pending_activation_unref (pending_activation); - bus_pending_activation_entry_free (pending_activation_entry); - return FALSE; - } - } - - pending_activation->timeout = - _dbus_timeout_new (bus_context_get_activation_timeout (activation->context), - pending_activation_timed_out, - pending_activation, - NULL); - if (!pending_activation->timeout) - { - _dbus_verbose ("Failed to create timeout for pending activation\n"); - - BUS_SET_OOM (error); - bus_pending_activation_unref (pending_activation); - bus_pending_activation_entry_free (pending_activation_entry); - return FALSE; - } - - if (!_dbus_loop_add_timeout (bus_context_get_loop (activation->context), - pending_activation->timeout)) - { - _dbus_verbose ("Failed to add timeout for pending activation\n"); - - BUS_SET_OOM (error); - bus_pending_activation_unref (pending_activation); - bus_pending_activation_entry_free (pending_activation_entry); - return FALSE; - } - - pending_activation->timeout_added = TRUE; - - if (!_dbus_list_append (&pending_activation->entries, pending_activation_entry)) - { - _dbus_verbose ("Failed to add entry to just-created pending activation\n"); - - BUS_SET_OOM (error); - bus_pending_activation_unref (pending_activation); - bus_pending_activation_entry_free (pending_activation_entry); - return FALSE; - } - - pending_activation->n_entries += 1; - pending_activation->activation->n_pending_activations += 1; - - if (!_dbus_hash_table_insert_string (activation->pending_activations, - pending_activation->service_name, - pending_activation)) - { - _dbus_verbose ("Failed to put pending activation in hash table\n"); - - BUS_SET_OOM (error); - bus_pending_activation_unref (pending_activation); - return FALSE; - } - } - - if (!add_cancel_pending_to_transaction (transaction, pending_activation)) - { - _dbus_verbose ("Failed to add pending activation cancel hook to transaction\n"); - BUS_SET_OOM (error); - _dbus_hash_table_remove_string (activation->pending_activations, - pending_activation->service_name); - - return FALSE; - } - - if (was_pending_activation) - return TRUE; - - if (bus_context_get_systemd_activation (activation->context)) - { - if (strcmp (service_name, "org.freedesktop.systemd1") == 0) - /* systemd itself is missing apparently. That can happen - only during early startup. Let's just wait until systemd - connects to us and do nothing. */ - return TRUE; - - if (entry->systemd_service) - { - BusTransaction *activation_transaction; - DBusString service_string; - BusService *service; - BusRegistry *registry; - - /* OK, we have a systemd service configured for this entry, - hence let's enqueue an activation request message. This - is implemented as a directed signal, not a method call, - for three reasons: 1) we don't expect a response on - success, where we just expect a name appearing on the - bus; 2) at this time the systemd service might not yet - have connected, so we wouldn't know the message serial at - this point to set up a pending call; 3) it is ugly if the - bus suddenly becomes the caller of a remote method. */ - - message = dbus_message_new_signal (DBUS_PATH_DBUS, - "org.freedesktop.systemd1.Activator", - "ActivationRequest"); - if (!message) - { - _dbus_verbose ("No memory to create activation message\n"); - BUS_SET_OOM (error); - return FALSE; - } - - if (!dbus_message_set_sender (message, DBUS_SERVICE_DBUS) || - !dbus_message_set_destination (message, "org.freedesktop.systemd1") || - !dbus_message_append_args (message, - DBUS_TYPE_STRING, &entry->systemd_service, - DBUS_TYPE_INVALID)) - { - _dbus_verbose ("No memory to set args of activation message\n"); - dbus_message_unref (message); - BUS_SET_OOM (error); - return FALSE; - } - - /* Create our transaction */ - activation_transaction = bus_transaction_new (activation->context); - if (activation_transaction == NULL) - { - _dbus_verbose ("No memory to create activation transaction\n"); - dbus_message_unref (message); - BUS_SET_OOM (error); - return FALSE; - } - - /* Check whether systemd is already connected */ - registry = bus_connection_get_registry (connection); - _dbus_string_init_const (&service_string, "org.freedesktop.systemd1"); - service = bus_registry_lookup (registry, &service_string); - - if (service != NULL) - { - bus_context_log (activation->context, - DBUS_SYSTEM_LOG_INFO, "Activating via systemd: service name='%s' unit='%s'", - service_name, - entry->systemd_service); - /* Wonderful, systemd is connected, let's just send the msg */ - retval = bus_dispatch_matches (activation_transaction, NULL, bus_service_get_primary_owners_connection (service), - message, error); - } - else - { - bus_context_log (activation->context, - DBUS_SYSTEM_LOG_INFO, "Activating systemd to hand-off: service name='%s' unit='%s'", - service_name, - entry->systemd_service); - /* systemd is not around, let's "activate" it. */ - retval = bus_activation_activate_service (activation, NULL, activation_transaction, TRUE, - message, "org.freedesktop.systemd1", error); - } - - dbus_message_unref (message); - - if (!retval) - { - bus_context_log (activation->context, - DBUS_SYSTEM_LOG_INFO, "Failed to activate via systemd: service name='%s' unit='%s'", - service_name, - entry->systemd_service); - _DBUS_ASSERT_ERROR_IS_SET (error); - _dbus_verbose ("failed to send activation message: %s\n", error->name); - bus_transaction_cancel_and_free (activation_transaction); - return FALSE; - } - - bus_transaction_execute_and_free (activation_transaction); - return TRUE; - } - - /* OK, we have no configured systemd service, hence let's - proceed with traditional activation. */ - } - - /* use command as system and session different */ - if (!_dbus_string_init (&command)) - { - BUS_SET_OOM (error); - return FALSE; - } - - /* does the bus use a helper? */ - servicehelper = bus_context_get_servicehelper (activation->context); - if (servicehelper != NULL) - { - if (entry->user == NULL) - { - _dbus_string_free (&command); - dbus_set_error (error, DBUS_ERROR_SPAWN_FILE_INVALID, - "Cannot do system-bus activation with no user\n"); - return FALSE; - } - - /* join the helper path and the service name */ - if (!_dbus_string_append (&command, servicehelper)) - { - _dbus_string_free (&command); - BUS_SET_OOM (error); - return FALSE; - } - if (!_dbus_string_append (&command, " ")) - { - _dbus_string_free (&command); - BUS_SET_OOM (error); - return FALSE; - } - if (!_dbus_string_append (&command, service_name)) - { - _dbus_string_free (&command); - BUS_SET_OOM (error); - return FALSE; - } - } - else - { - /* the bus does not use a helper, so we can append arguments with the exec line */ - if (!_dbus_string_append (&command, entry->exec)) - { - _dbus_string_free (&command); - BUS_SET_OOM (error); - return FALSE; - } - } - - /* convert command into arguments */ - if (!_dbus_shell_parse_argv (_dbus_string_get_const_data (&command), &argc, &argv, error)) - { - _dbus_verbose ("Failed to parse command line: %s\n", entry->exec); - _DBUS_ASSERT_ERROR_IS_SET (error); - - _dbus_hash_table_remove_string (activation->pending_activations, - pending_activation->service_name); - - _dbus_string_free (&command); - return FALSE; - } - _dbus_string_free (&command); - - if (!add_bus_environment (activation, error)) - { - _DBUS_ASSERT_ERROR_IS_SET (error); - dbus_free_string_array (argv); - return FALSE; - } - - envp = bus_activation_get_environment (activation); - - if (envp == NULL) - { - BUS_SET_OOM (error); - dbus_free_string_array (argv); - return FALSE; - } - - _dbus_verbose ("Spawning %s ...\n", argv[0]); - if (servicehelper != NULL) - bus_context_log (activation->context, - DBUS_SYSTEM_LOG_INFO, "Activating service name='%s' (using servicehelper)", - service_name); - else - bus_context_log (activation->context, - DBUS_SYSTEM_LOG_INFO, "Activating service name='%s'", - service_name); - - dbus_error_init (&tmp_error); - - if (!_dbus_spawn_async_with_babysitter (&pending_activation->babysitter, - service_name, - argv, - envp, - NULL, activation, - &tmp_error)) - { - _dbus_verbose ("Failed to spawn child\n"); - bus_context_log (activation->context, - DBUS_SYSTEM_LOG_INFO, "Failed to activate service %s: %s", - service_name, - tmp_error.message); - _DBUS_ASSERT_ERROR_IS_SET (&tmp_error); - dbus_move_error (&tmp_error, error); - dbus_free_string_array (argv); - dbus_free_string_array (envp); - - return FALSE; - } - - dbus_free_string_array (argv); - envp = NULL; - - _dbus_assert (pending_activation->babysitter != NULL); - - _dbus_babysitter_set_result_function (pending_activation->babysitter, - pending_activation_finished_cb, - pending_activation); - - if (!_dbus_babysitter_set_watch_functions (pending_activation->babysitter, - add_babysitter_watch, - remove_babysitter_watch, - toggle_babysitter_watch, - pending_activation, - NULL)) - { - BUS_SET_OOM (error); - _dbus_verbose ("Failed to set babysitter watch functions\n"); - return FALSE; - } - - return TRUE; -} - -dbus_bool_t -bus_activation_list_services (BusActivation *activation, - char ***listp, - int *array_len) -{ - int i, j, len; - char **retval; - DBusHashIter iter; - - len = _dbus_hash_table_get_n_entries (activation->entries); - retval = dbus_new (char *, len + 1); - - if (retval == NULL) - return FALSE; - - _dbus_hash_iter_init (activation->entries, &iter); - i = 0; - while (_dbus_hash_iter_next (&iter)) - { - BusActivationEntry *entry = _dbus_hash_iter_get_value (&iter); - - retval[i] = _dbus_strdup (entry->name); - if (retval[i] == NULL) - goto error; - - i++; - } - - retval[i] = NULL; - - if (array_len) - *array_len = len; - - *listp = retval; - return TRUE; - - error: - for (j = 0; j < i; j++) - dbus_free (retval[i]); - dbus_free (retval); - - return FALSE; -} - -dbus_bool_t -dbus_activation_systemd_failure (BusActivation *activation, - DBusMessage *message) -{ - DBusError error; - const char *code, *str, *unit = NULL; - - dbus_error_init(&error); - - /* This is called whenever the systemd activator sent us a - response. We'll invalidate all pending activations that match the - unit name. */ - - if (dbus_message_get_args (message, &error, - DBUS_TYPE_STRING, &unit, - DBUS_TYPE_STRING, &code, - DBUS_TYPE_STRING, &str, - DBUS_TYPE_INVALID)) - dbus_set_error(&error, code, str); - - - if (unit) - { - DBusHashIter iter; - - bus_context_log (activation->context, - DBUS_SYSTEM_LOG_INFO, "Activation via systemd failed for unit '%s': %s", - unit, - str); - - _dbus_hash_iter_init (activation->pending_activations, - &iter); - - while (_dbus_hash_iter_next (&iter)) - { - BusPendingActivation *p = _dbus_hash_iter_get_value (&iter); - - if (p->systemd_service && strcmp (p->systemd_service, unit) == 0) - pending_activation_failed(p, &error); - } - } - - dbus_error_free(&error); - - return TRUE; -} - -#ifdef DBUS_ENABLE_EMBEDDED_TESTS - -#include <stdio.h> - -#define SERVICE_NAME_1 "MyService1" -#define SERVICE_NAME_2 "MyService2" -#define SERVICE_NAME_3 "MyService3" - -#define SERVICE_FILE_1 "service-1.service" -#define SERVICE_FILE_2 "service-2.service" -#define SERVICE_FILE_3 "service-3.service" - -static dbus_bool_t -test_create_service_file (DBusString *dir, - const char *filename, - const char *name, - const char *exec) -{ - DBusString file_name, full_path; - FILE *file; - dbus_bool_t ret_val; - - ret_val = TRUE; - _dbus_string_init_const (&file_name, filename); - - if (!_dbus_string_init (&full_path)) - return FALSE; - - if (!_dbus_string_append (&full_path, _dbus_string_get_const_data (dir)) || - !_dbus_concat_dir_and_file (&full_path, &file_name)) - { - ret_val = FALSE; - goto out; - } - - file = fopen (_dbus_string_get_const_data (&full_path), "w"); - if (!file) - { - ret_val = FALSE; - goto out; - } - - fprintf (file, "[D-BUS Service]\nName=%s\nExec=%s\n", name, exec); - fclose (file); - -out: - _dbus_string_free (&full_path); - return ret_val; -} - -static dbus_bool_t -test_remove_service_file (DBusString *dir, const char *filename) -{ - DBusString file_name, full_path; - dbus_bool_t ret_val; - - ret_val = TRUE; - - _dbus_string_init_const (&file_name, filename); - - if (!_dbus_string_init (&full_path)) - return FALSE; - - if (!_dbus_string_append (&full_path, _dbus_string_get_const_data (dir)) || - !_dbus_concat_dir_and_file (&full_path, &file_name)) - { - ret_val = FALSE; - goto out; - } - - if (!_dbus_delete_file (&full_path, NULL)) - { - ret_val = FALSE; - goto out; - } - -out: - _dbus_string_free (&full_path); - return ret_val; -} - -static dbus_bool_t -test_remove_directory (DBusString *dir) -{ - DBusDirIter *iter; - DBusString filename, full_path; - dbus_bool_t ret_val; - - ret_val = TRUE; - - if (!_dbus_string_init (&filename)) - return FALSE; - - if (!_dbus_string_init (&full_path)) - { - _dbus_string_free (&filename); - return FALSE; - } - - iter = _dbus_directory_open (dir, NULL); - if (iter == NULL) - { - ret_val = FALSE; - goto out; - } - - while (_dbus_directory_get_next_file (iter, &filename, NULL)) - { - if (!test_remove_service_file (dir, _dbus_string_get_const_data (&filename))) - { - ret_val = FALSE; - goto out; - } - } - _dbus_directory_close (iter); - - if (!_dbus_delete_directory (dir, NULL)) - { - ret_val = FALSE; - goto out; - } - -out: - _dbus_string_free (&filename); - _dbus_string_free (&full_path); - - return ret_val; -} - -static dbus_bool_t -init_service_reload_test (DBusString *dir) -{ - DBusStat stat_buf; - - if (!_dbus_stat (dir, &stat_buf, NULL)) - { - if (!_dbus_create_directory (dir, NULL)) - return FALSE; - } - else - { - if (!test_remove_directory (dir)) - return FALSE; - - if (!_dbus_create_directory (dir, NULL)) - return FALSE; - } - - /* Create one initial file */ - if (!test_create_service_file (dir, SERVICE_FILE_1, SERVICE_NAME_1, "exec-1")) - return FALSE; - - return TRUE; -} - -static dbus_bool_t -cleanup_service_reload_test (DBusString *dir) -{ - if (!test_remove_directory (dir)) - return FALSE; - - return TRUE; -} - -typedef struct -{ - BusActivation *activation; - const char *service_name; - dbus_bool_t expecting_find; -} CheckData; - -static dbus_bool_t -check_func (void *data) -{ - CheckData *d; - BusActivationEntry *entry; - DBusError error; - dbus_bool_t ret_val; - - ret_val = TRUE; - d = data; - - dbus_error_init (&error); - - entry = activation_find_entry (d->activation, d->service_name, &error); - if (entry == NULL) - { - if (dbus_error_has_name (&error, DBUS_ERROR_NO_MEMORY)) - { - ret_val = TRUE; - } - else - { - if (d->expecting_find) - ret_val = FALSE; - } - - dbus_error_free (&error); - } - else - { - if (!d->expecting_find) - ret_val = FALSE; - } - - return ret_val; -} - -static dbus_bool_t -do_test (const char *description, dbus_bool_t oom_test, CheckData *data) -{ - dbus_bool_t err; - - if (oom_test) - err = !_dbus_test_oom_handling (description, check_func, data); - else - err = !check_func (data); - - if (err) - _dbus_assert_not_reached ("Test failed"); - - return TRUE; -} - -static dbus_bool_t -do_service_reload_test (DBusString *dir, dbus_bool_t oom_test) -{ - BusActivation *activation; - DBusString address; - DBusList *directories; - CheckData d; - - directories = NULL; - _dbus_string_init_const (&address, ""); - - if (!_dbus_list_append (&directories, _dbus_string_get_data (dir))) - return FALSE; - - activation = bus_activation_new (NULL, &address, &directories, NULL); - if (!activation) - return FALSE; - - d.activation = activation; - - /* Check for existing service file */ - d.expecting_find = TRUE; - d.service_name = SERVICE_NAME_1; - - if (!do_test ("Existing service file", oom_test, &d)) - return FALSE; - - /* Check for non-existing service file */ - d.expecting_find = FALSE; - d.service_name = SERVICE_NAME_3; - - if (!do_test ("Nonexisting service file", oom_test, &d)) - return FALSE; - - /* Check for added service file */ - if (!test_create_service_file (dir, SERVICE_FILE_2, SERVICE_NAME_2, "exec-2")) - return FALSE; - - d.expecting_find = TRUE; - d.service_name = SERVICE_NAME_2; - - if (!do_test ("Added service file", oom_test, &d)) - return FALSE; - - /* Check for removed service file */ - if (!test_remove_service_file (dir, SERVICE_FILE_2)) - return FALSE; - - d.expecting_find = FALSE; - d.service_name = SERVICE_FILE_2; - - if (!do_test ("Removed service file", oom_test, &d)) - return FALSE; - - /* Check for updated service file */ - - _dbus_sleep_milliseconds (1000); /* Sleep a second to make sure the mtime is updated */ - - if (!test_create_service_file (dir, SERVICE_FILE_1, SERVICE_NAME_3, "exec-3")) - return FALSE; - - d.expecting_find = TRUE; - d.service_name = SERVICE_NAME_3; - - if (!do_test ("Updated service file, part 1", oom_test, &d)) - return FALSE; - - d.expecting_find = FALSE; - d.service_name = SERVICE_NAME_1; - - if (!do_test ("Updated service file, part 2", oom_test, &d)) - return FALSE; - - bus_activation_unref (activation); - _dbus_list_clear (&directories); - - return TRUE; -} - -dbus_bool_t -bus_activation_service_reload_test (const DBusString *test_data_dir) -{ - DBusString directory; - const char *tmp; - - if (!_dbus_string_init (&directory)) - return FALSE; - - tmp = _dbus_get_tmpdir (); - - if (tmp == NULL) - return FALSE; - - if (!_dbus_string_append (&directory, tmp)) - return FALSE; - - if (!_dbus_string_append (&directory, "/dbus-reload-test-") || - !_dbus_generate_random_ascii (&directory, 6)) - { - return FALSE; - } - - /* Do normal tests */ - if (!init_service_reload_test (&directory)) - _dbus_assert_not_reached ("could not initiate service reload test"); - - if (!do_service_reload_test (&directory, FALSE)) - { - /* Do nothing? */ - } - - /* Do OOM tests */ - if (!init_service_reload_test (&directory)) - _dbus_assert_not_reached ("could not initiate service reload test"); - - if (!do_service_reload_test (&directory, TRUE)) - { - /* Do nothing? */ - } - - /* Cleanup test directory */ - if (!cleanup_service_reload_test (&directory)) - return FALSE; - - _dbus_string_free (&directory); - - return TRUE; -} - -#endif /* DBUS_ENABLE_EMBEDDED_TESTS */ |