/*-*- 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 <errno.h> #include "dbus.h" #include "log.h" #include "dbus-job.h" #define BUS_JOB_INTERFACE \ " <interface name=\"org.freedesktop.systemd1.Job\">\n" \ " <method name=\"Cancel\"/>\n" \ " <property name=\"Id\" type=\"u\" access=\"read\"/>\n" \ " <property name=\"Unit\" type=\"(so)\" access=\"read\"/>\n" \ " <property name=\"JobType\" type=\"s\" access=\"read\"/>\n" \ " <property name=\"State\" type=\"s\" access=\"read\"/>\n" \ " </interface>\n" #define INTROSPECTION \ DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE \ "<node>\n" \ BUS_JOB_INTERFACE \ BUS_PROPERTIES_INTERFACE \ BUS_PEER_INTERFACE \ BUS_INTROSPECTABLE_INTERFACE \ "</node>\n" const char bus_job_interface[] = BUS_JOB_INTERFACE; #define INVALIDATING_PROPERTIES \ "State\0" \ "\0" \ static DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_job_append_state, job_state, JobState); static DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_job_append_type, job_type, JobType); static int bus_job_append_unit(Manager *m, DBusMessageIter *i, const char *property, void *data) { Job *j = data; DBusMessageIter sub; char *p; assert(m); assert(i); assert(property); assert(j); if (!dbus_message_iter_open_container(i, DBUS_TYPE_STRUCT, NULL, &sub)) return -ENOMEM; if (!(p = unit_dbus_path(j->unit))) return -ENOMEM; if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &j->unit->meta.id) || !dbus_message_iter_append_basic(&sub, DBUS_TYPE_OBJECT_PATH, &p)) { free(p); return -ENOMEM; } free(p); if (!dbus_message_iter_close_container(i, &sub)) return -ENOMEM; return 0; } static DBusHandlerResult bus_job_message_dispatch(Job *j, DBusConnection *connection, DBusMessage *message) { const BusProperty properties[] = { { "org.freedesktop.systemd1.Job", "Id", bus_property_append_uint32, "u", &j->id }, { "org.freedesktop.systemd1.Job", "State", bus_job_append_state, "s", &j->state }, { "org.freedesktop.systemd1.Job", "JobType", bus_job_append_type, "s", &j->type }, { "org.freedesktop.systemd1.Job", "Unit", bus_job_append_unit, "(so)", j }, { NULL, NULL, NULL, NULL, NULL } }; DBusMessage *reply = NULL; if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Job", "Cancel")) { if (!(reply = dbus_message_new_method_return(message))) goto oom; job_free(j); } else return bus_default_message_handler(j->manager, connection, message, INTROSPECTION, properties); if (reply) { if (!dbus_connection_send(connection, reply, NULL)) goto oom; dbus_message_unref(reply); } return DBUS_HANDLER_RESULT_HANDLED; oom: if (reply) dbus_message_unref(reply); return DBUS_HANDLER_RESULT_NEED_MEMORY; } static DBusHandlerResult bus_job_message_handler(DBusConnection *connection, DBusMessage *message, void *data) { Manager *m = data; Job *j; int r; DBusMessage *reply; assert(connection); assert(message); assert(m); if (streq(dbus_message_get_path(message), "/org/freedesktop/systemd1/job")) { /* Be nice to gdbus and return introspection data for our mid-level paths */ if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Introspectable", "Introspect")) { char *introspection = NULL; FILE *f; Iterator i; size_t size; if (!(reply = dbus_message_new_method_return(message))) goto oom; /* We roll our own introspection code here, instead of * relying on bus_default_message_handler() because we * need to generate our introspection string * dynamically. */ if (!(f = open_memstream(&introspection, &size))) goto oom; fputs(DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE "<node>\n", f); fputs(BUS_INTROSPECTABLE_INTERFACE, f); fputs(BUS_PEER_INTERFACE, f); HASHMAP_FOREACH(j, m->jobs, i) fprintf(f, "<node name=\"job/%lu\"/>", (unsigned long) j->id); fputs("</node>\n", f); if (ferror(f)) { fclose(f); free(introspection); goto oom; } fclose(f); if (!introspection) goto oom; if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &introspection, DBUS_TYPE_INVALID)) { free(introspection); goto oom; } free(introspection); if (!dbus_connection_send(connection, reply, NULL)) goto oom; dbus_message_unref(reply); return DBUS_HANDLER_RESULT_HANDLED; } return DBUS_HANDLER_RESULT_NOT_YET_HANDLED; } if ((r = manager_get_job_from_dbus_path(m, dbus_message_get_path(message), &j)) < 0) { if (r == -ENOMEM) return DBUS_HANDLER_RESULT_NEED_MEMORY; if (r == -ENOENT) return DBUS_HANDLER_RESULT_NOT_YET_HANDLED; return bus_send_error_reply(m, connection, message, NULL, r); } return bus_job_message_dispatch(j, connection, message); oom: if (reply) dbus_message_unref(reply); return DBUS_HANDLER_RESULT_NEED_MEMORY; } const DBusObjectPathVTable bus_job_vtable = { .message_function = bus_job_message_handler }; static int job_send_message(Job *j, DBusMessage *m) { int r; assert(j); assert(m); if (bus_has_subscriber(j->manager)) { if ((r = bus_broadcast(j->manager, m)) < 0) return r; } else if (j->bus_client) { /* If nobody is subscribed, we just send the message * to the client which created the job */ assert(j->bus); if (!dbus_message_set_destination(m, j->bus_client)) return -ENOMEM; if (!dbus_connection_send(j->bus, m, NULL)) return -ENOMEM; } return 0; } void bus_job_send_change_signal(Job *j) { char *p = NULL; DBusMessage *m = NULL; assert(j); if (j->in_dbus_queue) { LIST_REMOVE(Job, dbus_queue, j->manager->dbus_job_queue, j); j->in_dbus_queue = false; } if (!bus_has_subscriber(j->manager) && !j->bus_client) { j->sent_dbus_new_signal = true; return; } if (!(p = job_dbus_path(j))) goto oom; if (j->sent_dbus_new_signal) { /* Send a properties changed signal */ if (!(m = bus_properties_changed_new(p, "org.freedesktop.systemd1.Job", INVALIDATING_PROPERTIES))) goto oom; } else { /* Send a new signal */ if (!(m = dbus_message_new_signal("/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "JobNew"))) goto oom; if (!dbus_message_append_args(m, DBUS_TYPE_UINT32, &j->id, DBUS_TYPE_OBJECT_PATH, &p, DBUS_TYPE_INVALID)) goto oom; } if (job_send_message(j, m) < 0) goto oom; free(p); dbus_message_unref(m); j->sent_dbus_new_signal = true; return; oom: free(p); if (m) dbus_message_unref(m); log_error("Failed to allocate job change signal."); } void bus_job_send_removed_signal(Job *j, bool success) { char *p = NULL; DBusMessage *m = NULL; dbus_bool_t b = success; assert(j); if (!bus_has_subscriber(j->manager) && !j->bus_client) return; if (!j->sent_dbus_new_signal) bus_job_send_change_signal(j); if (!(p = job_dbus_path(j))) goto oom; if (!(m = dbus_message_new_signal("/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "JobRemoved"))) goto oom; if (!dbus_message_append_args(m, DBUS_TYPE_UINT32, &j->id, DBUS_TYPE_OBJECT_PATH, &p, DBUS_TYPE_BOOLEAN, &b, DBUS_TYPE_INVALID)) goto oom; if (job_send_message(j, m) < 0) goto oom; free(p); dbus_message_unref(m); return; oom: free(p); if (m) dbus_message_unref(m); log_error("Failed to allocate job remove signal."); }