+++ /dev/null
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
- This file is part of systemd.
-
- Copyright 2010 Lennart Poettering
-
- systemd 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.
-
- systemd 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 systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#include <sys/epoll.h>
-#include <sys/timerfd.h>
-#include <errno.h>
-#include <unistd.h>
-#include <dbus/dbus.h>
-
-#include "dbus.h"
-#include "log.h"
-#include "strv.h"
-#include "cgroup.h"
-#include "mkdir.h"
-#include "dbus-unit.h"
-#include "dbus-job.h"
-#include "dbus-manager.h"
-#include "dbus-service.h"
-#include "dbus-socket.h"
-#include "dbus-target.h"
-#include "dbus-device.h"
-#include "dbus-mount.h"
-#include "dbus-automount.h"
-#include "dbus-snapshot.h"
-#include "dbus-swap.h"
-#include "dbus-timer.h"
-#include "dbus-path.h"
-#include "bus-errors.h"
-#include "special.h"
-#include "dbus-common.h"
-
-#define CONNECTIONS_MAX 52
-
-/* Well-known address (http://dbus.freedesktop.org/doc/dbus-specification.html#message-bus-types) */
-#define DBUS_SYSTEM_BUS_DEFAULT_ADDRESS "unix:path=/var/run/dbus/system_bus_socket"
-/* Only used as a fallback */
-#define DBUS_SESSION_BUS_DEFAULT_ADDRESS "autolaunch:"
-
-static const char bus_properties_interface[] = BUS_PROPERTIES_INTERFACE;
-static const char bus_introspectable_interface[] = BUS_INTROSPECTABLE_INTERFACE;
-
-const char *const bus_interface_table[] = {
- "org.freedesktop.DBus.Properties", bus_properties_interface,
- "org.freedesktop.DBus.Introspectable", bus_introspectable_interface,
- "org.freedesktop.systemd1.Manager", bus_manager_interface,
- "org.freedesktop.systemd1.Job", bus_job_interface,
- "org.freedesktop.systemd1.Unit", bus_unit_interface,
- "org.freedesktop.systemd1.Service", bus_service_interface,
- "org.freedesktop.systemd1.Socket", bus_socket_interface,
- "org.freedesktop.systemd1.Target", bus_target_interface,
- "org.freedesktop.systemd1.Device", bus_device_interface,
- "org.freedesktop.systemd1.Mount", bus_mount_interface,
- "org.freedesktop.systemd1.Automount", bus_automount_interface,
- "org.freedesktop.systemd1.Snapshot", bus_snapshot_interface,
- "org.freedesktop.systemd1.Swap", bus_swap_interface,
- "org.freedesktop.systemd1.Timer", bus_timer_interface,
- "org.freedesktop.systemd1.Path", bus_path_interface,
- NULL
-};
-
-static void bus_done_api(Manager *m);
-static void bus_done_system(Manager *m);
-static void bus_done_private(Manager *m);
-static void shutdown_connection(Manager *m, DBusConnection *c);
-
-static void bus_dispatch_status(DBusConnection *bus, DBusDispatchStatus status, void *data) {
- Manager *m = data;
-
- assert(bus);
- assert(m);
-
- /* We maintain two sets, one for those connections where we
- * requested a dispatch, and another where we didn't. And then,
- * we move the connections between the two sets. */
-
- if (status == DBUS_DISPATCH_COMPLETE)
- set_move_one(m->bus_connections, m->bus_connections_for_dispatch, bus);
- else
- set_move_one(m->bus_connections_for_dispatch, m->bus_connections, bus);
-}
-
-void bus_watch_event(Manager *m, Watch *w, int events) {
- assert(m);
- assert(w);
-
- /* This is called by the event loop whenever there is
- * something happening on D-Bus' file handles. */
-
- if (!dbus_watch_get_enabled(w->data.bus_watch))
- return;
-
- dbus_watch_handle(w->data.bus_watch, bus_events_to_flags(events));
-}
-
-static dbus_bool_t bus_add_watch(DBusWatch *bus_watch, void *data) {
- Manager *m = data;
- Watch *w;
- struct epoll_event ev;
-
- assert(bus_watch);
- assert(m);
-
- if (!(w = new0(Watch, 1)))
- return FALSE;
-
- w->fd = dbus_watch_get_unix_fd(bus_watch);
- w->type = WATCH_DBUS_WATCH;
- w->data.bus_watch = bus_watch;
-
- zero(ev);
- ev.events = bus_flags_to_events(bus_watch);
- ev.data.ptr = w;
-
- if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, w->fd, &ev) < 0) {
-
- if (errno != EEXIST) {
- free(w);
- return FALSE;
- }
-
- /* Hmm, bloody D-Bus creates multiple watches on the
- * same fd. epoll() does not like that. As a dirty
- * hack we simply dup() the fd and hence get a second
- * one we can safely add to the epoll(). */
-
- if ((w->fd = dup(w->fd)) < 0) {
- free(w);
- return FALSE;
- }
-
- if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, w->fd, &ev) < 0) {
- close_nointr_nofail(w->fd);
- free(w);
- return FALSE;
- }
-
- w->fd_is_dupped = true;
- }
-
- dbus_watch_set_data(bus_watch, w, NULL);
-
- return TRUE;
-}
-
-static void bus_remove_watch(DBusWatch *bus_watch, void *data) {
- Manager *m = data;
- Watch *w;
-
- assert(bus_watch);
- assert(m);
-
- w = dbus_watch_get_data(bus_watch);
- if (!w)
- return;
-
- assert(w->type == WATCH_DBUS_WATCH);
- assert_se(epoll_ctl(m->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0);
-
- if (w->fd_is_dupped)
- close_nointr_nofail(w->fd);
-
- free(w);
-}
-
-static void bus_toggle_watch(DBusWatch *bus_watch, void *data) {
- Manager *m = data;
- Watch *w;
- struct epoll_event ev;
-
- assert(bus_watch);
- assert(m);
-
- w = dbus_watch_get_data(bus_watch);
- if (!w)
- return;
-
- assert(w->type == WATCH_DBUS_WATCH);
-
- zero(ev);
- ev.events = bus_flags_to_events(bus_watch);
- ev.data.ptr = w;
-
- assert_se(epoll_ctl(m->epoll_fd, EPOLL_CTL_MOD, w->fd, &ev) == 0);
-}
-
-static int bus_timeout_arm(Manager *m, Watch *w) {
- struct itimerspec its;
-
- assert(m);
- assert(w);
-
- zero(its);
-
- if (dbus_timeout_get_enabled(w->data.bus_timeout)) {
- timespec_store(&its.it_value, dbus_timeout_get_interval(w->data.bus_timeout) * USEC_PER_MSEC);
- its.it_interval = its.it_value;
- }
-
- if (timerfd_settime(w->fd, 0, &its, NULL) < 0)
- return -errno;
-
- return 0;
-}
-
-void bus_timeout_event(Manager *m, Watch *w, int events) {
- assert(m);
- assert(w);
-
- /* This is called by the event loop whenever there is
- * something happening on D-Bus' file handles. */
-
- if (!(dbus_timeout_get_enabled(w->data.bus_timeout)))
- return;
-
- dbus_timeout_handle(w->data.bus_timeout);
-}
-
-static dbus_bool_t bus_add_timeout(DBusTimeout *timeout, void *data) {
- Manager *m = data;
- Watch *w;
- struct epoll_event ev;
-
- assert(timeout);
- assert(m);
-
- if (!(w = new0(Watch, 1)))
- return FALSE;
-
- if ((w->fd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK|TFD_CLOEXEC)) < 0)
- goto fail;
-
- w->type = WATCH_DBUS_TIMEOUT;
- w->data.bus_timeout = timeout;
-
- if (bus_timeout_arm(m, w) < 0)
- goto fail;
-
- zero(ev);
- ev.events = EPOLLIN;
- ev.data.ptr = w;
-
- if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, w->fd, &ev) < 0)
- goto fail;
-
- dbus_timeout_set_data(timeout, w, NULL);
-
- return TRUE;
-
-fail:
- if (w->fd >= 0)
- close_nointr_nofail(w->fd);
-
- free(w);
- return FALSE;
-}
-
-static void bus_remove_timeout(DBusTimeout *timeout, void *data) {
- Manager *m = data;
- Watch *w;
-
- assert(timeout);
- assert(m);
-
- w = dbus_timeout_get_data(timeout);
- if (!w)
- return;
-
- assert(w->type == WATCH_DBUS_TIMEOUT);
-
- assert_se(epoll_ctl(m->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0);
- close_nointr_nofail(w->fd);
- free(w);
-}
-
-static void bus_toggle_timeout(DBusTimeout *timeout, void *data) {
- Manager *m = data;
- Watch *w;
- int r;
-
- assert(timeout);
- assert(m);
-
- w = dbus_timeout_get_data(timeout);
- if (!w)
- return;
-
- assert(w->type == WATCH_DBUS_TIMEOUT);
-
- if ((r = bus_timeout_arm(m, w)) < 0)
- log_error("Failed to rearm timer: %s", strerror(-r));
-}
-
-static DBusHandlerResult api_bus_message_filter(DBusConnection *connection, DBusMessage *message, void *data) {
- Manager *m = data;
- DBusError error;
- DBusMessage *reply = NULL;
-
- assert(connection);
- assert(message);
- assert(m);
-
- dbus_error_init(&error);
-
- if (dbus_message_get_type(message) == DBUS_MESSAGE_TYPE_METHOD_CALL ||
- dbus_message_get_type(message) == DBUS_MESSAGE_TYPE_SIGNAL)
- log_debug("Got D-Bus request: %s.%s() on %s",
- dbus_message_get_interface(message),
- dbus_message_get_member(message),
- dbus_message_get_path(message));
-
- if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) {
- log_debug("API D-Bus connection terminated.");
- bus_done_api(m);
-
- } else if (dbus_message_is_signal(message, DBUS_INTERFACE_DBUS, "NameOwnerChanged")) {
- const char *name, *old_owner, *new_owner;
-
- if (!dbus_message_get_args(message, &error,
- DBUS_TYPE_STRING, &name,
- DBUS_TYPE_STRING, &old_owner,
- DBUS_TYPE_STRING, &new_owner,
- DBUS_TYPE_INVALID))
- log_error("Failed to parse NameOwnerChanged message: %s", bus_error_message(&error));
- else {
- if (set_remove(BUS_CONNECTION_SUBSCRIBED(m, connection), (char*) name))
- log_debug("Subscription client vanished: %s (left: %u)", name, set_size(BUS_CONNECTION_SUBSCRIBED(m, connection)));
-
- if (old_owner[0] == 0)
- old_owner = NULL;
-
- if (new_owner[0] == 0)
- new_owner = NULL;
-
- manager_dispatch_bus_name_owner_changed(m, name, old_owner, new_owner);
- }
- } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Activator", "ActivationRequest")) {
- const char *name;
-
- if (!dbus_message_get_args(message, &error,
- DBUS_TYPE_STRING, &name,
- DBUS_TYPE_INVALID))
- log_error("Failed to parse ActivationRequest message: %s", bus_error_message(&error));
- else {
- int r;
- Unit *u;
-
- log_debug("Got D-Bus activation request for %s", name);
-
- if (manager_unit_pending_inactive(m, SPECIAL_DBUS_SERVICE) ||
- manager_unit_pending_inactive(m, SPECIAL_DBUS_SOCKET)) {
- r = -EADDRNOTAVAIL;
- dbus_set_error(&error, BUS_ERROR_SHUTTING_DOWN, "Refusing activation, D-Bus is shutting down.");
- } else {
- r = manager_load_unit(m, name, NULL, &error, &u);
-
- if (r >= 0 && u->refuse_manual_start)
- r = -EPERM;
-
- if (r >= 0)
- r = manager_add_job(m, JOB_START, u, JOB_REPLACE, true, &error, NULL);
- }
-
- if (r < 0) {
- const char *id, *text;
-
- log_debug("D-Bus activation failed for %s: %s", name, strerror(-r));
-
- if (!(reply = dbus_message_new_signal("/org/freedesktop/systemd1", "org.freedesktop.systemd1.Activator", "ActivationFailure")))
- goto oom;
-
- id = error.name ? error.name : bus_errno_to_dbus(r);
- text = bus_error(&error, r);
-
- if (!dbus_message_set_destination(reply, DBUS_SERVICE_DBUS) ||
- !dbus_message_append_args(reply,
- DBUS_TYPE_STRING, &name,
- DBUS_TYPE_STRING, &id,
- DBUS_TYPE_STRING, &text,
- DBUS_TYPE_INVALID))
- goto oom;
- }
-
- /* On success we don't do anything, the service will be spawned now */
- }
- }
-
- dbus_error_free(&error);
-
- if (reply) {
- if (!dbus_connection_send(connection, reply, NULL))
- goto oom;
-
- dbus_message_unref(reply);
- }
-
- return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
-
-oom:
- if (reply)
- dbus_message_unref(reply);
-
- dbus_error_free(&error);
-
- return DBUS_HANDLER_RESULT_NEED_MEMORY;
-}
-
-static DBusHandlerResult system_bus_message_filter(DBusConnection *connection, DBusMessage *message, void *data) {
- Manager *m = data;
- DBusError error;
-
- assert(connection);
- assert(message);
- assert(m);
-
- dbus_error_init(&error);
-
- if (m->api_bus != m->system_bus &&
- (dbus_message_get_type(message) == DBUS_MESSAGE_TYPE_METHOD_CALL ||
- dbus_message_get_type(message) == DBUS_MESSAGE_TYPE_SIGNAL))
- log_debug("Got D-Bus request on system bus: %s.%s() on %s",
- dbus_message_get_interface(message),
- dbus_message_get_member(message),
- dbus_message_get_path(message));
-
- if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) {
- log_debug("System D-Bus connection terminated.");
- bus_done_system(m);
-
- } else if (m->running_as != MANAGER_SYSTEM &&
- dbus_message_is_signal(message, "org.freedesktop.systemd1.Agent", "Released")) {
-
- const char *cgroup;
-
- if (!dbus_message_get_args(message, &error,
- DBUS_TYPE_STRING, &cgroup,
- DBUS_TYPE_INVALID))
- log_error("Failed to parse Released message: %s", bus_error_message(&error));
- else
- cgroup_notify_empty(m, cgroup);
- }
-
- dbus_error_free(&error);
- return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
-}
-
-static DBusHandlerResult private_bus_message_filter(DBusConnection *connection, DBusMessage *message, void *data) {
- Manager *m = data;
- DBusError error;
-
- assert(connection);
- assert(message);
- assert(m);
-
- dbus_error_init(&error);
-
- if (dbus_message_get_type(message) == DBUS_MESSAGE_TYPE_METHOD_CALL ||
- dbus_message_get_type(message) == DBUS_MESSAGE_TYPE_SIGNAL)
- log_debug("Got D-Bus request: %s.%s() on %s",
- dbus_message_get_interface(message),
- dbus_message_get_member(message),
- dbus_message_get_path(message));
-
- if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected"))
- shutdown_connection(m, connection);
- else if (m->running_as == MANAGER_SYSTEM &&
- dbus_message_is_signal(message, "org.freedesktop.systemd1.Agent", "Released")) {
-
- const char *cgroup;
-
- if (!dbus_message_get_args(message, &error,
- DBUS_TYPE_STRING, &cgroup,
- DBUS_TYPE_INVALID))
- log_error("Failed to parse Released message: %s", bus_error_message(&error));
- else
- cgroup_notify_empty(m, cgroup);
-
- /* Forward the message to the system bus, so that user
- * instances are notified as well */
-
- if (m->system_bus)
- dbus_connection_send(m->system_bus, message, NULL);
- }
-
- dbus_error_free(&error);
-
- return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
-}
-
-unsigned bus_dispatch(Manager *m) {
- DBusConnection *c;
-
- assert(m);
-
- if (m->queued_message) {
- /* If we cannot get rid of this message we won't
- * dispatch any D-Bus messages, so that we won't end
- * up wanting to queue another message. */
-
- if (m->queued_message_connection)
- if (!dbus_connection_send(m->queued_message_connection, m->queued_message, NULL))
- return 0;
-
- dbus_message_unref(m->queued_message);
- m->queued_message = NULL;
- m->queued_message_connection = NULL;
- }
-
- if ((c = set_first(m->bus_connections_for_dispatch))) {
- if (dbus_connection_dispatch(c) == DBUS_DISPATCH_COMPLETE)
- set_move_one(m->bus_connections, m->bus_connections_for_dispatch, c);
-
- return 1;
- }
-
- return 0;
-}
-
-static void request_name_pending_cb(DBusPendingCall *pending, void *userdata) {
- DBusMessage *reply;
- DBusError error;
-
- dbus_error_init(&error);
-
- assert_se(reply = dbus_pending_call_steal_reply(pending));
-
- switch (dbus_message_get_type(reply)) {
-
- case DBUS_MESSAGE_TYPE_ERROR:
-
- assert_se(dbus_set_error_from_message(&error, reply));
- log_warning("RequestName() failed: %s", bus_error_message(&error));
- break;
-
- case DBUS_MESSAGE_TYPE_METHOD_RETURN: {
- uint32_t r;
-
- if (!dbus_message_get_args(reply,
- &error,
- DBUS_TYPE_UINT32, &r,
- DBUS_TYPE_INVALID)) {
- log_error("Failed to parse RequestName() reply: %s", bus_error_message(&error));
- break;
- }
-
- if (r == 1)
- log_debug("Successfully acquired name.");
- else
- log_error("Name already owned.");
-
- break;
- }
-
- default:
- assert_not_reached("Invalid reply message");
- }
-
- dbus_message_unref(reply);
- dbus_error_free(&error);
-}
-
-static int request_name(Manager *m) {
- const char *name = "org.freedesktop.systemd1";
- /* Allow replacing of our name, to ease implementation of
- * reexecution, where we keep the old connection open until
- * after the new connection is set up and the name installed
- * to allow clients to synchronously wait for reexecution to
- * finish */
- uint32_t flags = DBUS_NAME_FLAG_ALLOW_REPLACEMENT|DBUS_NAME_FLAG_REPLACE_EXISTING;
- DBusMessage *message = NULL;
- DBusPendingCall *pending = NULL;
-
- if (!(message = dbus_message_new_method_call(
- DBUS_SERVICE_DBUS,
- DBUS_PATH_DBUS,
- DBUS_INTERFACE_DBUS,
- "RequestName")))
- goto oom;
-
- if (!dbus_message_append_args(
- message,
- DBUS_TYPE_STRING, &name,
- DBUS_TYPE_UINT32, &flags,
- DBUS_TYPE_INVALID))
- goto oom;
-
- if (!dbus_connection_send_with_reply(m->api_bus, message, &pending, -1))
- goto oom;
-
- if (!dbus_pending_call_set_notify(pending, request_name_pending_cb, m, NULL))
- goto oom;
-
- dbus_message_unref(message);
- dbus_pending_call_unref(pending);
-
- /* We simple ask for the name and don't wait for it. Sooner or
- * later we'll have it. */
-
- return 0;
-
-oom:
- if (pending) {
- dbus_pending_call_cancel(pending);
- dbus_pending_call_unref(pending);
- }
-
- if (message)
- dbus_message_unref(message);
-
- return -ENOMEM;
-}
-
-static void query_name_list_pending_cb(DBusPendingCall *pending, void *userdata) {
- DBusMessage *reply;
- DBusError error;
- Manager *m = userdata;
-
- assert(m);
-
- dbus_error_init(&error);
-
- assert_se(reply = dbus_pending_call_steal_reply(pending));
-
- switch (dbus_message_get_type(reply)) {
-
- case DBUS_MESSAGE_TYPE_ERROR:
-
- assert_se(dbus_set_error_from_message(&error, reply));
- log_warning("ListNames() failed: %s", bus_error_message(&error));
- break;
-
- case DBUS_MESSAGE_TYPE_METHOD_RETURN: {
- int r;
- char **l;
-
- if ((r = bus_parse_strv(reply, &l)) < 0)
- log_warning("Failed to parse ListNames() reply: %s", strerror(-r));
- else {
- char **t;
-
- STRV_FOREACH(t, l)
- /* This is a bit hacky, we say the
- * owner of the name is the name
- * itself, because we don't want the
- * extra traffic to figure out the
- * real owner. */
- manager_dispatch_bus_name_owner_changed(m, *t, NULL, *t);
-
- strv_free(l);
- }
-
- break;
- }
-
- default:
- assert_not_reached("Invalid reply message");
- }
-
- dbus_message_unref(reply);
- dbus_error_free(&error);
-}
-
-static int query_name_list(Manager *m) {
- DBusMessage *message = NULL;
- DBusPendingCall *pending = NULL;
-
- /* Asks for the currently installed bus names */
-
- if (!(message = dbus_message_new_method_call(
- DBUS_SERVICE_DBUS,
- DBUS_PATH_DBUS,
- DBUS_INTERFACE_DBUS,
- "ListNames")))
- goto oom;
-
- if (!dbus_connection_send_with_reply(m->api_bus, message, &pending, -1))
- goto oom;
-
- if (!dbus_pending_call_set_notify(pending, query_name_list_pending_cb, m, NULL))
- goto oom;
-
- dbus_message_unref(message);
- dbus_pending_call_unref(pending);
-
- /* We simple ask for the list and don't wait for it. Sooner or
- * later we'll get it. */
-
- return 0;
-
-oom:
- if (pending) {
- dbus_pending_call_cancel(pending);
- dbus_pending_call_unref(pending);
- }
-
- if (message)
- dbus_message_unref(message);
-
- return -ENOMEM;
-}
-
-static int bus_setup_loop(Manager *m, DBusConnection *bus) {
- assert(m);
- assert(bus);
-
- dbus_connection_set_exit_on_disconnect(bus, FALSE);
-
- if (!dbus_connection_set_watch_functions(bus, bus_add_watch, bus_remove_watch, bus_toggle_watch, m, NULL) ||
- !dbus_connection_set_timeout_functions(bus, bus_add_timeout, bus_remove_timeout, bus_toggle_timeout, m, NULL)) {
- log_error("Not enough memory");
- return -ENOMEM;
- }
-
- if (set_put(m->bus_connections_for_dispatch, bus) < 0) {
- log_error("Not enough memory");
- return -ENOMEM;
- }
-
- dbus_connection_set_dispatch_status_function(bus, bus_dispatch_status, m, NULL);
- return 0;
-}
-
-static dbus_bool_t allow_only_same_user(DBusConnection *connection, unsigned long uid, void *data) {
- return uid == 0 || uid == geteuid();
-}
-
-static void bus_new_connection(
- DBusServer *server,
- DBusConnection *new_connection,
- void *data) {
-
- Manager *m = data;
-
- assert(m);
-
- if (set_size(m->bus_connections) >= CONNECTIONS_MAX) {
- log_error("Too many concurrent connections.");
- return;
- }
-
- dbus_connection_set_unix_user_function(new_connection, allow_only_same_user, NULL, NULL);
-
- if (bus_setup_loop(m, new_connection) < 0)
- return;
-
- if (!dbus_connection_register_object_path(new_connection, "/org/freedesktop/systemd1", &bus_manager_vtable, m) ||
- !dbus_connection_register_fallback(new_connection, "/org/freedesktop/systemd1/unit", &bus_unit_vtable, m) ||
- !dbus_connection_register_fallback(new_connection, "/org/freedesktop/systemd1/job", &bus_job_vtable, m) ||
- !dbus_connection_add_filter(new_connection, private_bus_message_filter, m, NULL)) {
- log_error("Not enough memory.");
- return;
- }
-
- log_debug("Accepted connection on private bus.");
-
- dbus_connection_ref(new_connection);
-}
-
-static int init_registered_system_bus(Manager *m) {
- char *id;
-
- if (!dbus_connection_add_filter(m->system_bus, system_bus_message_filter, m, NULL)) {
- log_error("Not enough memory");
- return -ENOMEM;
- }
-
- if (m->running_as != MANAGER_SYSTEM) {
- DBusError error;
-
- dbus_error_init(&error);
-
- dbus_bus_add_match(m->system_bus,
- "type='signal',"
- "interface='org.freedesktop.systemd1.Agent',"
- "member='Released',"
- "path='/org/freedesktop/systemd1/agent'",
- &error);
-
- if (dbus_error_is_set(&error)) {
- log_error("Failed to register match: %s", bus_error_message(&error));
- dbus_error_free(&error);
- return -1;
- }
- }
-
- log_debug("Successfully connected to system D-Bus bus %s as %s",
- strnull((id = dbus_connection_get_server_id(m->system_bus))),
- strnull(dbus_bus_get_unique_name(m->system_bus)));
- dbus_free(id);
-
- return 0;
-}
-
-static int init_registered_api_bus(Manager *m) {
- int r;
-
- if (!dbus_connection_register_object_path(m->api_bus, "/org/freedesktop/systemd1", &bus_manager_vtable, m) ||
- !dbus_connection_register_fallback(m->api_bus, "/org/freedesktop/systemd1/unit", &bus_unit_vtable, m) ||
- !dbus_connection_register_fallback(m->api_bus, "/org/freedesktop/systemd1/job", &bus_job_vtable, m) ||
- !dbus_connection_add_filter(m->api_bus, api_bus_message_filter, m, NULL)) {
- log_error("Not enough memory");
- return -ENOMEM;
- }
-
- /* Get NameOwnerChange messages */
- dbus_bus_add_match(m->api_bus,
- "type='signal',"
- "sender='"DBUS_SERVICE_DBUS"',"
- "interface='"DBUS_INTERFACE_DBUS"',"
- "member='NameOwnerChanged',"
- "path='"DBUS_PATH_DBUS"'",
- NULL);
-
- /* Get activation requests */
- dbus_bus_add_match(m->api_bus,
- "type='signal',"
- "sender='"DBUS_SERVICE_DBUS"',"
- "interface='org.freedesktop.systemd1.Activator',"
- "member='ActivationRequest',"
- "path='"DBUS_PATH_DBUS"'",
- NULL);
-
- r = request_name(m);
- if (r < 0)
- return r;
-
- r = query_name_list(m);
- if (r < 0)
- return r;
-
- if (m->running_as == MANAGER_USER) {
- char *id;
- log_debug("Successfully connected to API D-Bus bus %s as %s",
- strnull((id = dbus_connection_get_server_id(m->api_bus))),
- strnull(dbus_bus_get_unique_name(m->api_bus)));
- dbus_free(id);
- } else
- log_debug("Successfully initialized API on the system bus");
-
- return 0;
-}
-
-static void bus_register_cb(DBusPendingCall *pending, void *userdata) {
- Manager *m = userdata;
- DBusConnection **conn;
- DBusMessage *reply;
- DBusError error;
- const char *name;
- int r = 0;
-
- dbus_error_init(&error);
-
- conn = dbus_pending_call_get_data(pending, m->conn_data_slot);
- assert(conn == &m->system_bus || conn == &m->api_bus);
-
- reply = dbus_pending_call_steal_reply(pending);
-
- switch (dbus_message_get_type(reply)) {
- case DBUS_MESSAGE_TYPE_ERROR:
- assert_se(dbus_set_error_from_message(&error, reply));
- log_warning("Failed to register to bus: %s", bus_error_message(&error));
- r = -1;
- break;
- case DBUS_MESSAGE_TYPE_METHOD_RETURN:
- if (!dbus_message_get_args(reply, &error,
- DBUS_TYPE_STRING, &name,
- DBUS_TYPE_INVALID)) {
- log_error("Failed to parse Hello reply: %s", bus_error_message(&error));
- r = -1;
- break;
- }
-
- log_debug("Received name %s in reply to Hello", name);
- if (!dbus_bus_set_unique_name(*conn, name)) {
- log_error("Failed to set unique name");
- r = -1;
- break;
- }
-
- if (conn == &m->system_bus) {
- r = init_registered_system_bus(m);
- if (r == 0 && m->running_as == MANAGER_SYSTEM)
- r = init_registered_api_bus(m);
- } else
- r = init_registered_api_bus(m);
-
- break;
- default:
- assert_not_reached("Invalid reply message");
- }
-
- dbus_message_unref(reply);
- dbus_error_free(&error);
-
- if (r < 0) {
- if (conn == &m->system_bus) {
- log_debug("Failed setting up the system bus");
- bus_done_system(m);
- } else {
- log_debug("Failed setting up the API bus");
- bus_done_api(m);
- }
- }
-}
-
-static int manager_bus_async_register(Manager *m, DBusConnection **conn) {
- DBusMessage *message = NULL;
- DBusPendingCall *pending = NULL;
-
- message = dbus_message_new_method_call(DBUS_SERVICE_DBUS,
- DBUS_PATH_DBUS,
- DBUS_INTERFACE_DBUS,
- "Hello");
- if (!message)
- goto oom;
-
- if (!dbus_connection_send_with_reply(*conn, message, &pending, -1))
- goto oom;
-
- if (!dbus_pending_call_set_data(pending, m->conn_data_slot, conn, NULL))
- goto oom;
-
- if (!dbus_pending_call_set_notify(pending, bus_register_cb, m, NULL))
- goto oom;
-
- dbus_message_unref(message);
- dbus_pending_call_unref(pending);
-
- return 0;
-oom:
- if (pending) {
- dbus_pending_call_cancel(pending);
- dbus_pending_call_unref(pending);
- }
-
- if (message)
- dbus_message_unref(message);
-
- return -ENOMEM;
-}
-
-static DBusConnection* manager_bus_connect_private(Manager *m, DBusBusType type) {
- const char *address;
- DBusConnection *connection;
- DBusError error;
-
- switch (type) {
- case DBUS_BUS_SYSTEM:
- address = getenv("DBUS_SYSTEM_BUS_ADDRESS");
- if (!address || !address[0])
- address = DBUS_SYSTEM_BUS_DEFAULT_ADDRESS;
- break;
- case DBUS_BUS_SESSION:
- address = getenv("DBUS_SESSION_BUS_ADDRESS");
- if (!address || !address[0])
- address = DBUS_SESSION_BUS_DEFAULT_ADDRESS;
- break;
- default:
- assert_not_reached("Invalid bus type");
- }
-
- dbus_error_init(&error);
-
- connection = dbus_connection_open_private(address, &error);
- if (!connection) {
- log_warning("Failed to open private bus connection: %s", bus_error_message(&error));
- goto fail;
- }
-
- return connection;
-fail:
- if (connection)
- dbus_connection_close(connection);
- dbus_error_free(&error);
- return NULL;
-}
-
-static int bus_init_system(Manager *m) {
- int r;
-
- if (m->system_bus)
- return 0;
-
- m->system_bus = manager_bus_connect_private(m, DBUS_BUS_SYSTEM);
- if (!m->system_bus) {
- log_debug("Failed to connect to system D-Bus, retrying later");
- r = 0;
- goto fail;
- }
-
- r = bus_setup_loop(m, m->system_bus);
- if (r < 0)
- goto fail;
-
- r = manager_bus_async_register(m, &m->system_bus);
- if (r < 0)
- goto fail;
-
- return 0;
-fail:
- bus_done_system(m);
-
- return r;
-}
-
-static int bus_init_api(Manager *m) {
- int r;
-
- if (m->api_bus)
- return 0;
-
- if (m->running_as == MANAGER_SYSTEM) {
- m->api_bus = m->system_bus;
- /* In this mode there is no distinct connection to the API bus,
- * the API is published on the system bus.
- * bus_register_cb() is aware of that and will init the API
- * when the system bus gets registered.
- * No need to setup anything here. */
- return 0;
- }
-
- m->api_bus = manager_bus_connect_private(m, DBUS_BUS_SESSION);
- if (!m->api_bus) {
- log_debug("Failed to connect to API D-Bus, retrying later");
- r = 0;
- goto fail;
- }
-
- r = bus_setup_loop(m, m->api_bus);
- if (r < 0)
- goto fail;
-
- r = manager_bus_async_register(m, &m->api_bus);
- if (r < 0)
- goto fail;
-
- return 0;
-fail:
- bus_done_api(m);
-
- return r;
-}
-
-static int bus_init_private(Manager *m) {
- DBusError error;
- int r;
- const char *const external_only[] = {
- "EXTERNAL",
- NULL
- };
-
- assert(m);
-
- dbus_error_init(&error);
-
- if (m->private_bus)
- return 0;
-
- if (m->running_as == MANAGER_SYSTEM) {
-
- /* We want the private bus only when running as init */
- if (getpid() != 1)
- return 0;
-
- unlink("/run/systemd/private");
- m->private_bus = dbus_server_listen("unix:path=/run/systemd/private", &error);
- } else {
- const char *e;
- char *p;
-
- e = getenv("XDG_RUNTIME_DIR");
- if (!e)
- return 0;
-
- if (asprintf(&p, "unix:path=%s/systemd/private", e) < 0) {
- log_error("Not enough memory");
- r = -ENOMEM;
- goto fail;
- }
-
- mkdir_parents(p+10, 0755);
- unlink(p+10);
- m->private_bus = dbus_server_listen(p, &error);
- free(p);
- }
-
- if (!m->private_bus) {
- log_error("Failed to create private D-Bus server: %s", bus_error_message(&error));
- r = -EIO;
- goto fail;
- }
-
- if (!dbus_server_set_auth_mechanisms(m->private_bus, (const char**) external_only) ||
- !dbus_server_set_watch_functions(m->private_bus, bus_add_watch, bus_remove_watch, bus_toggle_watch, m, NULL) ||
- !dbus_server_set_timeout_functions(m->private_bus, bus_add_timeout, bus_remove_timeout, bus_toggle_timeout, m, NULL)) {
- log_error("Not enough memory");
- r = -ENOMEM;
- goto fail;
- }
-
- dbus_server_set_new_connection_function(m->private_bus, bus_new_connection, m, NULL);
-
- log_debug("Successfully created private D-Bus server.");
-
- return 0;
-
-fail:
- bus_done_private(m);
- dbus_error_free(&error);
-
- return r;
-}
-
-int bus_init(Manager *m, bool try_bus_connect) {
- int r;
-
- if (set_ensure_allocated(&m->bus_connections, trivial_hash_func, trivial_compare_func) < 0 ||
- set_ensure_allocated(&m->bus_connections_for_dispatch, trivial_hash_func, trivial_compare_func) < 0)
- goto oom;
-
- if (m->name_data_slot < 0)
- if (!dbus_pending_call_allocate_data_slot(&m->name_data_slot))
- goto oom;
-
- if (m->conn_data_slot < 0)
- if (!dbus_pending_call_allocate_data_slot(&m->conn_data_slot))
- goto oom;
-
- if (m->subscribed_data_slot < 0)
- if (!dbus_connection_allocate_data_slot(&m->subscribed_data_slot))
- goto oom;
-
- if (try_bus_connect) {
- if ((r = bus_init_system(m)) < 0 ||
- (r = bus_init_api(m)) < 0)
- return r;
- }
-
- if ((r = bus_init_private(m)) < 0)
- return r;
-
- return 0;
-oom:
- log_error("Not enough memory");
- return -ENOMEM;
-}
-
-static void shutdown_connection(Manager *m, DBusConnection *c) {
- Set *s;
- Job *j;
- Iterator i;
-
- HASHMAP_FOREACH(j, m->jobs, i)
- if (j->bus == c) {
- free(j->bus_client);
- j->bus_client = NULL;
-
- j->bus = NULL;
- }
-
- set_remove(m->bus_connections, c);
- set_remove(m->bus_connections_for_dispatch, c);
-
- if ((s = BUS_CONNECTION_SUBSCRIBED(m, c))) {
- char *t;
-
- while ((t = set_steal_first(s)))
- free(t);
-
- set_free(s);
- }
-
- if (m->queued_message_connection == c) {
- m->queued_message_connection = NULL;
-
- if (m->queued_message) {
- dbus_message_unref(m->queued_message);
- m->queued_message = NULL;
- }
- }
-
- dbus_connection_set_dispatch_status_function(c, NULL, NULL, NULL);
- /* system manager cannot afford to block on DBus */
- if (m->running_as != MANAGER_SYSTEM)
- dbus_connection_flush(c);
- dbus_connection_close(c);
- dbus_connection_unref(c);
-}
-
-static void bus_done_api(Manager *m) {
- if (!m->api_bus)
- return;
-
- if (m->running_as == MANAGER_USER)
- shutdown_connection(m, m->api_bus);
-
- m->api_bus = NULL;
-
- if (m->queued_message) {
- dbus_message_unref(m->queued_message);
- m->queued_message = NULL;
- }
-}
-
-static void bus_done_system(Manager *m) {
- if (!m->system_bus)
- return;
-
- if (m->running_as == MANAGER_SYSTEM)
- bus_done_api(m);
-
- shutdown_connection(m, m->system_bus);
- m->system_bus = NULL;
-}
-
-static void bus_done_private(Manager *m) {
- if (!m->private_bus)
- return;
-
- dbus_server_disconnect(m->private_bus);
- dbus_server_unref(m->private_bus);
- m->private_bus = NULL;
-}
-
-void bus_done(Manager *m) {
- DBusConnection *c;
-
- bus_done_api(m);
- bus_done_system(m);
- bus_done_private(m);
-
- while ((c = set_steal_first(m->bus_connections)))
- shutdown_connection(m, c);
-
- while ((c = set_steal_first(m->bus_connections_for_dispatch)))
- shutdown_connection(m, c);
-
- set_free(m->bus_connections);
- set_free(m->bus_connections_for_dispatch);
-
- if (m->name_data_slot >= 0)
- dbus_pending_call_free_data_slot(&m->name_data_slot);
-
- if (m->conn_data_slot >= 0)
- dbus_pending_call_free_data_slot(&m->conn_data_slot);
-
- if (m->subscribed_data_slot >= 0)
- dbus_connection_free_data_slot(&m->subscribed_data_slot);
-}
-
-static void query_pid_pending_cb(DBusPendingCall *pending, void *userdata) {
- Manager *m = userdata;
- DBusMessage *reply;
- DBusError error;
- const char *name;
-
- dbus_error_init(&error);
-
- assert_se(name = BUS_PENDING_CALL_NAME(m, pending));
- assert_se(reply = dbus_pending_call_steal_reply(pending));
-
- switch (dbus_message_get_type(reply)) {
-
- case DBUS_MESSAGE_TYPE_ERROR:
-
- assert_se(dbus_set_error_from_message(&error, reply));
- log_warning("GetConnectionUnixProcessID() failed: %s", bus_error_message(&error));
- break;
-
- case DBUS_MESSAGE_TYPE_METHOD_RETURN: {
- uint32_t r;
-
- if (!dbus_message_get_args(reply,
- &error,
- DBUS_TYPE_UINT32, &r,
- DBUS_TYPE_INVALID)) {
- log_error("Failed to parse GetConnectionUnixProcessID() reply: %s", bus_error_message(&error));
- break;
- }
-
- manager_dispatch_bus_query_pid_done(m, name, (pid_t) r);
- break;
- }
-
- default:
- assert_not_reached("Invalid reply message");
- }
-
- dbus_message_unref(reply);
- dbus_error_free(&error);
-}
-
-int bus_query_pid(Manager *m, const char *name) {
- DBusMessage *message = NULL;
- DBusPendingCall *pending = NULL;
- char *n = NULL;
-
- assert(m);
- assert(name);
-
- if (!(message = dbus_message_new_method_call(
- DBUS_SERVICE_DBUS,
- DBUS_PATH_DBUS,
- DBUS_INTERFACE_DBUS,
- "GetConnectionUnixProcessID")))
- goto oom;
-
- if (!(dbus_message_append_args(
- message,
- DBUS_TYPE_STRING, &name,
- DBUS_TYPE_INVALID)))
- goto oom;
-
- if (!dbus_connection_send_with_reply(m->api_bus, message, &pending, -1))
- goto oom;
-
- if (!(n = strdup(name)))
- goto oom;
-
- if (!dbus_pending_call_set_data(pending, m->name_data_slot, n, free))
- goto oom;
-
- n = NULL;
-
- if (!dbus_pending_call_set_notify(pending, query_pid_pending_cb, m, NULL))
- goto oom;
-
- dbus_message_unref(message);
- dbus_pending_call_unref(pending);
-
- return 0;
-
-oom:
- free(n);
-
- if (pending) {
- dbus_pending_call_cancel(pending);
- dbus_pending_call_unref(pending);
- }
-
- if (message)
- dbus_message_unref(message);
-
- return -ENOMEM;
-}
-
-int bus_broadcast(Manager *m, DBusMessage *message) {
- bool oom = false;
- Iterator i;
- DBusConnection *c;
-
- assert(m);
- assert(message);
-
- SET_FOREACH(c, m->bus_connections_for_dispatch, i)
- if (c != m->system_bus || m->running_as == MANAGER_SYSTEM)
- oom = !dbus_connection_send(c, message, NULL);
-
- SET_FOREACH(c, m->bus_connections, i)
- if (c != m->system_bus || m->running_as == MANAGER_SYSTEM)
- oom = !dbus_connection_send(c, message, NULL);
-
- return oom ? -ENOMEM : 0;
-}
-
-bool bus_has_subscriber(Manager *m) {
- Iterator i;
- DBusConnection *c;
-
- assert(m);
-
- SET_FOREACH(c, m->bus_connections_for_dispatch, i)
- if (bus_connection_has_subscriber(m, c))
- return true;
-
- SET_FOREACH(c, m->bus_connections, i)
- if (bus_connection_has_subscriber(m, c))
- return true;
-
- return false;
-}
-
-bool bus_connection_has_subscriber(Manager *m, DBusConnection *c) {
- assert(m);
- assert(c);
-
- return !set_isempty(BUS_CONNECTION_SUBSCRIBED(m, c));
-}
-
-int bus_fdset_add_all(Manager *m, FDSet *fds) {
- Iterator i;
- DBusConnection *c;
-
- assert(m);
- assert(fds);
-
- /* When we are about to reexecute we add all D-Bus fds to the
- * set to pass over to the newly executed systemd. They won't
- * be used there however, except that they are closed at the
- * very end of deserialization, those making it possible for
- * clients to synchronously wait for systemd to reexec by
- * simply waiting for disconnection */
-
- SET_FOREACH(c, m->bus_connections_for_dispatch, i) {
- int fd;
-
- if (dbus_connection_get_unix_fd(c, &fd)) {
- fd = fdset_put_dup(fds, fd);
-
- if (fd < 0)
- return fd;
- }
- }
-
- SET_FOREACH(c, m->bus_connections, i) {
- int fd;
-
- if (dbus_connection_get_unix_fd(c, &fd)) {
- fd = fdset_put_dup(fds, fd);
-
- if (fd < 0)
- return fd;
- }
- }
-
- return 0;
-}
-
-void bus_broadcast_finished(
- Manager *m,
- usec_t kernel_usec,
- usec_t initrd_usec,
- usec_t userspace_usec,
- usec_t total_usec) {
-
- DBusMessage *message;
-
- assert(m);
-
- message = dbus_message_new_signal("/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "StartupFinished");
- if (!message) {
- log_error("Out of memory.");
- return;
- }
-
- assert_cc(sizeof(usec_t) == sizeof(uint64_t));
- if (!dbus_message_append_args(message,
- DBUS_TYPE_UINT64, &kernel_usec,
- DBUS_TYPE_UINT64, &initrd_usec,
- DBUS_TYPE_UINT64, &userspace_usec,
- DBUS_TYPE_UINT64, &total_usec,
- DBUS_TYPE_INVALID)) {
- log_error("Out of memory.");
- goto finish;
- }
-
-
- if (bus_broadcast(m, message) < 0) {
- log_error("Out of memory.");
- goto finish;
- }
-
-finish:
- if (message)
- dbus_message_unref(message);
-}
~ianmdlvl / elogind.git / blobdiff