+++ /dev/null
-/*-*- Mode: C; c-basic-offset: 8 -*-*/
-
-/***
- 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 "dbus-unit.h"
-#include "dbus-job.h"
-#include "dbus-manager.h"
-
-static void api_bus_dispatch_status(DBusConnection *bus, DBusDispatchStatus status, void *data) {
- Manager *m = data;
-
- assert(bus);
- assert(m);
-
- if (!m->api_bus)
- return;
-
- assert(m->api_bus == bus);
-
- m->request_api_bus_dispatch = status != DBUS_DISPATCH_COMPLETE;
-}
-
-static void system_bus_dispatch_status(DBusConnection *bus, DBusDispatchStatus status, void *data) {
- Manager *m = data;
-
- assert(bus);
- assert(m);
-
- if (!m->system_bus)
- return;
-
- assert(m->system_bus == bus);
-
- m->request_system_bus_dispatch = status != DBUS_DISPATCH_COMPLETE;
-}
-
-static uint32_t bus_flags_to_events(DBusWatch *bus_watch) {
- unsigned flags;
- uint32_t events = 0;
-
- assert(bus_watch);
-
- /* no watch flags for disabled watches */
- if (!dbus_watch_get_enabled(bus_watch))
- return 0;
-
- flags = dbus_watch_get_flags(bus_watch);
-
- if (flags & DBUS_WATCH_READABLE)
- events |= EPOLLIN;
- if (flags & DBUS_WATCH_WRITABLE)
- events |= EPOLLOUT;
-
- return events | EPOLLHUP | EPOLLERR;
-}
-
-static unsigned events_to_bus_flags(uint32_t events) {
- unsigned flags = 0;
-
- if (events & EPOLLIN)
- flags |= DBUS_WATCH_READABLE;
- if (events & EPOLLOUT)
- flags |= DBUS_WATCH_WRITABLE;
- if (events & EPOLLHUP)
- flags |= DBUS_WATCH_HANGUP;
- if (events & EPOLLERR)
- flags |= DBUS_WATCH_ERROR;
-
- return flags;
-}
-
-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, events_to_bus_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) {
- free(w);
- close_nointr_nofail(w->fd);
- 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);
-
- if (!(w = dbus_watch_get_data(bus_watch)))
- 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);
-
- assert_se(w = dbus_watch_get_data(bus_watch));
- 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_interval;
- }
-
- 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);
-
- if (!(w = dbus_timeout_get_data(timeout)))
- 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);
-
- assert_se(w = dbus_timeout_get_data(timeout));
- 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;
-
- assert(connection);
- assert(message);
- assert(m);
-
- dbus_error_init(&error);
-
- /* 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_error("Warning! 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", error.message);
- else {
- if (set_remove(m->subscribed, (char*) name))
- log_debug("Subscription client vanished: %s (left: %u)", name, set_size(m->subscribed));
-
- 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);
- }
- }
-
- dbus_error_free(&error);
- return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
-}
-
-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);
-
- /* 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_error("Warning! System D-Bus connection terminated.");
- bus_done_system(m);
-
- } if (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", error.message);
- else
- cgroup_notify_empty(m, cgroup);
- }
-
- dbus_error_free(&error);
- return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
-}
-
-unsigned bus_dispatch(Manager *m) {
- 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 (!dbus_connection_send(m->api_bus, m->queued_message, NULL))
- return 0;
-
- dbus_message_unref(m->queued_message);
- m->queued_message = NULL;
- }
-
- if (m->request_api_bus_dispatch) {
- if (dbus_connection_dispatch(m->api_bus) == DBUS_DISPATCH_COMPLETE)
- m->request_api_bus_dispatch = false;
-
- return 1;
- }
-
- if (m->request_system_bus_dispatch) {
- if (dbus_connection_dispatch(m->system_bus) == DBUS_DISPATCH_COMPLETE)
- m->request_system_bus_dispatch = false;
-
- 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", error.message);
- 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", error.message);
- 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";
- uint32_t flags = 0;
- 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 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))
- return -ENOMEM;
-
- return 0;
-}
-
-int bus_init_system(Manager *m) {
- DBusError error;
- char *id;
- int r;
-
- assert(m);
-
- dbus_error_init(&error);
-
- if (m->system_bus)
- return 0;
-
- if (m->running_as != MANAGER_SESSION && m->api_bus)
- m->system_bus = m->api_bus;
- else {
- if (!(m->system_bus = dbus_bus_get_private(DBUS_BUS_SYSTEM, &error))) {
- log_debug("Failed to get system D-Bus connection, retrying later: %s", error.message);
- dbus_error_free(&error);
- return 0;
- }
-
- dbus_connection_set_dispatch_status_function(m->system_bus, system_bus_dispatch_status, m, NULL);
- m->request_system_bus_dispatch = true;
-
- if ((r = bus_setup_loop(m, m->system_bus)) < 0) {
- bus_done_system(m);
- return r;
- }
- }
-
- if (!dbus_connection_add_filter(m->system_bus, system_bus_message_filter, m, NULL)) {
- bus_done_system(m);
- return -ENOMEM;
- }
-
- dbus_bus_add_match(m->system_bus,
- "type='signal',"
- "interface='org.freedesktop.systemd1.Agent',"
- "path='/org/freedesktop/systemd1/agent'",
- &error);
-
- if (dbus_error_is_set(&error)) {
- log_error("Failed to register match: %s", error.message);
- dbus_error_free(&error);
- bus_done_system(m);
- return -ENOMEM;
- }
-
- 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;
-}
-
-int bus_init_api(Manager *m) {
- DBusError error;
- char *id;
- int r;
-
- assert(m);
-
- dbus_error_init(&error);
-
- if (m->api_bus)
- return 0;
-
- if (m->name_data_slot < 0)
- if (!dbus_pending_call_allocate_data_slot(&m->name_data_slot))
- return -ENOMEM;
-
- if (m->running_as != MANAGER_SESSION && m->system_bus)
- m->api_bus = m->system_bus;
- else {
- if (!(m->api_bus = dbus_bus_get_private(m->running_as == MANAGER_SESSION ? DBUS_BUS_SESSION : DBUS_BUS_SYSTEM, &error))) {
- log_debug("Failed to get API D-Bus connection, retrying later: %s", error.message);
- dbus_error_free(&error);
- return 0;
- }
-
- dbus_connection_set_dispatch_status_function(m->api_bus, api_bus_dispatch_status, m, NULL);
- m->request_api_bus_dispatch = true;
-
- if ((r = bus_setup_loop(m, m->api_bus)) < 0) {
- bus_done_api(m);
- return 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)) {
- bus_done_api(m);
- return -ENOMEM;
- }
-
- dbus_bus_add_match(m->api_bus,
- "type='signal',"
- "sender='"DBUS_SERVICE_DBUS"',"
- "interface='"DBUS_INTERFACE_DBUS"',"
- "path='"DBUS_PATH_DBUS"'",
- &error);
-
- if (dbus_error_is_set(&error)) {
- log_error("Failed to register match: %s", error.message);
- dbus_error_free(&error);
- bus_done_api(m);
- return -ENOMEM;
- }
-
- if ((r = request_name(m)) < 0) {
- bus_done_api(m);
- return r;
- }
-
- 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);
-
- if (!m->subscribed)
- if (!(m->subscribed = set_new(string_hash_func, string_compare_func)))
- return -ENOMEM;
-
- return 0;
-}
-
-void bus_done_api(Manager *m) {
- assert(m);
-
- if (m->api_bus) {
- if (m->system_bus == m->api_bus)
- m->system_bus = NULL;
-
- dbus_connection_set_dispatch_status_function(m->api_bus, NULL, NULL, NULL);
- dbus_connection_flush(m->api_bus);
- dbus_connection_close(m->api_bus);
- dbus_connection_unref(m->api_bus);
- m->api_bus = NULL;
- }
-
- if (m->subscribed) {
- char *c;
-
- while ((c = set_steal_first(m->subscribed)))
- free(c);
-
- set_free(m->subscribed);
- m->subscribed = NULL;
- }
-
- if (m->name_data_slot >= 0)
- dbus_pending_call_free_data_slot(&m->name_data_slot);
-
- if (m->queued_message) {
- dbus_message_unref(m->queued_message);
- m->queued_message = NULL;
- }
-}
-
-void bus_done_system(Manager *m) {
- assert(m);
-
- if (m->system_bus == m->api_bus)
- bus_done_api(m);
-
- if (m->system_bus) {
- dbus_connection_set_dispatch_status_function(m->system_bus, NULL, NULL, NULL);
- dbus_connection_flush(m->system_bus);
- dbus_connection_close(m->system_bus);
- dbus_connection_unref(m->system_bus);
- m->system_bus = NULL;
- }
-}
-
-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 = dbus_pending_call_get_data(pending, m->name_data_slot));
- 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", error.message);
- 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", error.message);
- 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;
-}
-
-DBusHandlerResult bus_default_message_handler(Manager *m, DBusMessage *message, const char*introspection, const BusProperty *properties) {
- DBusError error;
- DBusMessage *reply = NULL;
- int r;
-
- assert(m);
- assert(message);
-
- dbus_error_init(&error);
-
- if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Introspectable", "Introspect") && introspection) {
-
- if (!(reply = dbus_message_new_method_return(message)))
- goto oom;
-
- if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &introspection, DBUS_TYPE_INVALID))
- goto oom;
-
- } else if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Properties", "Get") && properties) {
- const char *interface, *property;
- const BusProperty *p;
-
- if (!dbus_message_get_args(
- message,
- &error,
- DBUS_TYPE_STRING, &interface,
- DBUS_TYPE_STRING, &property,
- DBUS_TYPE_INVALID))
- return bus_send_error_reply(m, message, &error, -EINVAL);
-
- for (p = properties; p->property; p++)
- if (streq(p->interface, interface) && streq(p->property, property))
- break;
-
- if (p->property) {
- DBusMessageIter iter, sub;
-
- if (!(reply = dbus_message_new_method_return(message)))
- goto oom;
-
- dbus_message_iter_init_append(reply, &iter);
-
- if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_VARIANT, p->signature, &sub))
- goto oom;
-
- if ((r = p->append(m, &sub, property, (void*) p->data)) < 0) {
-
- if (r == -ENOMEM)
- goto oom;
-
- dbus_message_unref(reply);
- return bus_send_error_reply(m, message, NULL, r);
- }
-
- if (!dbus_message_iter_close_container(&iter, &sub))
- goto oom;
- }
- } else if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Properties", "GetAll") && properties) {
- const char *interface;
- const BusProperty *p;
- DBusMessageIter iter, sub, sub2, sub3;
- bool any = false;
-
- if (!dbus_message_get_args(
- message,
- &error,
- DBUS_TYPE_STRING, &interface,
- DBUS_TYPE_INVALID))
- return bus_send_error_reply(m, message, &error, -EINVAL);
-
- if (!(reply = dbus_message_new_method_return(message)))
- goto oom;
-
- dbus_message_iter_init_append(reply, &iter);
-
- if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "{sv}", &sub))
- goto oom;
-
- for (p = properties; p->property; p++) {
- if (!streq(p->interface, interface))
- continue;
-
- if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_DICT_ENTRY, NULL, &sub2) ||
- !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &p->property) ||
- !dbus_message_iter_open_container(&sub2, DBUS_TYPE_VARIANT, p->signature, &sub3))
- goto oom;
-
- if ((r = p->append(m, &sub3, p->property, (void*) p->data)) < 0) {
-
- if (r == -ENOMEM)
- goto oom;
-
- dbus_message_unref(reply);
- return bus_send_error_reply(m, message, NULL, r);
- }
-
- if (!dbus_message_iter_close_container(&sub2, &sub3) ||
- !dbus_message_iter_close_container(&sub, &sub2))
- goto oom;
-
- any = true;
- }
-
- if (!dbus_message_iter_close_container(&iter, &sub))
- goto oom;
- }
-
- if (reply) {
- if (!dbus_connection_send(m->api_bus, reply, NULL))
- goto oom;
-
- dbus_message_unref(reply);
- return DBUS_HANDLER_RESULT_HANDLED;
- }
-
- 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 const char *error_to_dbus(int error) {
-
- switch(error) {
-
- case -EINVAL:
- return DBUS_ERROR_INVALID_ARGS;
-
- case -ENOMEM:
- return DBUS_ERROR_NO_MEMORY;
-
- case -EPERM:
- case -EACCES:
- return DBUS_ERROR_ACCESS_DENIED;
-
- case -ESRCH:
- return DBUS_ERROR_UNIX_PROCESS_ID_UNKNOWN;
-
- case -ENOENT:
- return DBUS_ERROR_FILE_NOT_FOUND;
-
- case -EEXIST:
- return DBUS_ERROR_FILE_EXISTS;
-
- case -ETIMEDOUT:
- return DBUS_ERROR_TIMEOUT;
-
- case -EIO:
- return DBUS_ERROR_IO_ERROR;
-
- case -ENETRESET:
- case -ECONNABORTED:
- case -ECONNRESET:
- return DBUS_ERROR_DISCONNECTED;
- }
-
- return DBUS_ERROR_FAILED;
-}
-
-DBusHandlerResult bus_send_error_reply(Manager *m, DBusMessage *message, DBusError *bus_error, int error) {
- DBusMessage *reply = NULL;
- const char *name, *text;
-
- if (bus_error && dbus_error_is_set(bus_error)) {
- name = bus_error->name;
- text = bus_error->message;
- } else {
- name = error_to_dbus(error);
- text = strerror(-error);
- }
-
- if (!(reply = dbus_message_new_error(message, name, text)))
- goto oom;
-
- if (!dbus_connection_send(m->api_bus, reply, NULL))
- goto oom;
-
- dbus_message_unref(reply);
-
- if (bus_error)
- dbus_error_free(bus_error);
-
- return DBUS_HANDLER_RESULT_HANDLED;
-
-oom:
- if (reply)
- dbus_message_unref(reply);
-
- if (bus_error)
- dbus_error_free(bus_error);
-
- return DBUS_HANDLER_RESULT_NEED_MEMORY;
-}
-
-int bus_property_append_string(Manager *m, DBusMessageIter *i, const char *property, void *data) {
- const char *t = data;
-
- assert(m);
- assert(i);
- assert(property);
-
- if (!t)
- t = "";
-
- if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t))
- return -ENOMEM;
-
- return 0;
-}
-
-int bus_property_append_strv(Manager *m, DBusMessageIter *i, const char *property, void *data) {
- DBusMessageIter sub;
- char **t = data;
-
- assert(m);
- assert(i);
- assert(property);
-
- if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "s", &sub))
- return -ENOMEM;
-
- STRV_FOREACH(t, t)
- if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, t))
- return -ENOMEM;
-
- if (!dbus_message_iter_close_container(i, &sub))
- return -ENOMEM;
-
- return 0;
-}
-
-int bus_property_append_bool(Manager *m, DBusMessageIter *i, const char *property, void *data) {
- bool *b = data;
- dbus_bool_t db;
-
- assert(m);
- assert(i);
- assert(property);
- assert(b);
-
- db = *b;
-
- if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &db))
- return -ENOMEM;
-
- return 0;
-}
-
-int bus_property_append_uint64(Manager *m, DBusMessageIter *i, const char *property, void *data) {
- assert(m);
- assert(i);
- assert(property);
- assert(data);
-
- /* Let's ensure that pid_t is actually 64bit, and hence this
- * function can be used for usec_t */
- assert_cc(sizeof(uint64_t) == sizeof(usec_t));
-
- if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT64, data))
- return -ENOMEM;
-
- return 0;
-}
-
-int bus_property_append_uint32(Manager *m, DBusMessageIter *i, const char *property, void *data) {
- assert(m);
- assert(i);
- assert(property);
- assert(data);
-
- /* Let's ensure that pid_t and mode_t is actually 32bit, and
- * hence this function can be used for pid_t/mode_t */
- assert_cc(sizeof(uint32_t) == sizeof(pid_t));
- assert_cc(sizeof(uint32_t) == sizeof(mode_t));
- assert_cc(sizeof(uint32_t) == sizeof(unsigned));
-
- if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT32, data))
- return -ENOMEM;
-
- return 0;
-}
-
-int bus_property_append_int32(Manager *m, DBusMessageIter *i, const char *property, void *data) {
- assert(m);
- assert(i);
- assert(property);
- assert(data);
-
- assert_cc(sizeof(int32_t) == sizeof(int));
-
- if (!dbus_message_iter_append_basic(i, DBUS_TYPE_INT32, data))
- return -ENOMEM;
-
- return 0;
-}
-
-int bus_parse_strv(DBusMessage *m, char ***_l) {
- DBusMessageIter iter, sub;
- unsigned n = 0, i = 0;
- char **l;
-
- assert(m);
- assert(_l);
-
- if (!dbus_message_iter_init(m, &iter) ||
- dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
- dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRING)
- return -EINVAL;
-
- dbus_message_iter_recurse(&iter, &sub);
-
- while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
- n++;
- dbus_message_iter_next(&sub);
- }
-
- if (!(l = new(char*, n+1)))
- return -ENOMEM;
-
- assert_se(dbus_message_iter_init(m, &iter));
- dbus_message_iter_recurse(&iter, &sub);
-
- while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
- const char *s;
-
- assert_se(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING);
- dbus_message_iter_get_basic(&sub, &s);
-
- if (!(l[i++] = strdup(s))) {
- strv_free(l);
- return -ENOMEM;
- }
-
- dbus_message_iter_next(&sub);
- }
-
- assert(i == n);
- l[i] = NULL;
-
- if (_l)
- *_l = l;
-
- return 0;
-}
~ianmdlvl / elogind.git / blobdiff