/*-*- 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 <errno.h> #include "dbus.h" #include "log.h" #define INTROSPECTION_BEGIN \ DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE \ "<node>" \ " <interface name=\"org.freedesktop.systemd1\">" \ " <method name=\"GetUnit\">" \ " <arg name=\"name\" type=\"s\" direction=\"in\"/>" \ " <arg name=\"unit\" type=\"o\" direction=\"out\"/>" \ " </method>" \ " <method name=\"LoadUnit\">" \ " <arg name=\"name\" type=\"s\" direction=\"in\"/>" \ " <arg name=\"unit\" type=\"o\" direction=\"out\"/>" \ " </method>" \ " <method name=\"GetJob\">" \ " <arg name=\"id\" type=\"u\" direction=\"in\"/>" \ " <arg name=\"unit\" type=\"o\" direction=\"out\"/>" \ " </method>" \ " <method name=\"ClearJobs\"/>" \ " <method name=\"ListUnits\">" \ " <arg name=\"units\" type=\"a(ssssouso)\" direction=\"out\"/>" \ " </method>" \ " <method name=\"ListJobs\">" \ " <arg name=\"jobs\" type=\"a(usssoo)\" direction=\"out\"/>" \ " </method>" \ " <method name=\"Subscribe\"/>" \ " <method name=\"Unsubscribe\"/>" \ " <signal name=\"UnitNew\">" \ " <arg name=\"id\" type=\"s\"/>" \ " <arg name=\"unit\" type=\"o\"/>" \ " </signal>" \ " <signal name=\"UnitRemoved\">" \ " <arg name=\"id\" type=\"s\"/>" \ " <arg name=\"unit\" type=\"o\"/>" \ " </signal>" \ " <signal name=\"JobNew\">" \ " <arg name=\"id\" type=\"u\"/>" \ " <arg name=\"job\" type=\"o\"/>" \ " </signal>" \ " <signal name=\"JobRemoved\">" \ " <arg name=\"id\" type=\"u\"/>" \ " <arg name=\"job\" type=\"o\"/>" \ " </signal>" \ " </interface>" \ BUS_PROPERTIES_INTERFACE \ BUS_INTROSPECTABLE_INTERFACE #define INTROSPECTION_END \ "</node>" static DBusHandlerResult bus_manager_message_handler(DBusConnection *connection, DBusMessage *message, void *data) { int r; Manager *m = data; DBusError error; DBusMessage *reply = NULL; char * path = NULL; 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_method_call(message, "org.freedesktop.systemd1", "GetUnit")) { const char *name; Unit *u; if (!dbus_message_get_args( message, &error, DBUS_TYPE_STRING, &name, DBUS_TYPE_INVALID)) return bus_send_error_reply(m, message, &error, -EINVAL); if (!(u = manager_get_unit(m, name))) return bus_send_error_reply(m, message, NULL, -ENOENT); if (!(reply = dbus_message_new_method_return(message))) goto oom; if (!(path = unit_dbus_path(u))) goto oom; if (!dbus_message_append_args( reply, DBUS_TYPE_OBJECT_PATH, &path, DBUS_TYPE_INVALID)) goto oom; } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1", "LoadUnit")) { const char *name; Unit *u; if (!dbus_message_get_args( message, &error, DBUS_TYPE_STRING, &name, DBUS_TYPE_INVALID)) return bus_send_error_reply(m, message, &error, -EINVAL); if ((r = manager_load_unit(m, name, &u)) < 0) return bus_send_error_reply(m, message, NULL, r); if (!(reply = dbus_message_new_method_return(message))) goto oom; if (!(path = unit_dbus_path(u))) goto oom; if (!dbus_message_append_args( reply, DBUS_TYPE_OBJECT_PATH, &path, DBUS_TYPE_INVALID)) goto oom; } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1", "GetJob")) { uint32_t id; Job *j; if (!dbus_message_get_args( message, &error, DBUS_TYPE_UINT32, &id, DBUS_TYPE_INVALID)) return bus_send_error_reply(m, message, &error, -EINVAL); if (!(j = manager_get_job(m, id))) return bus_send_error_reply(m, message, NULL, -ENOENT); if (!(reply = dbus_message_new_method_return(message))) goto oom; if (!(path = job_dbus_path(j))) goto oom; if (!dbus_message_append_args( reply, DBUS_TYPE_OBJECT_PATH, &path, DBUS_TYPE_INVALID)) goto oom; } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1", "ClearJobs")) { manager_clear_jobs(m); if (!(reply = dbus_message_new_method_return(message))) goto oom; } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1", "ListUnits")) { DBusMessageIter iter, sub; Iterator i; Unit *u; const char *k; 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, "(ssssouso)", &sub)) goto oom; HASHMAP_FOREACH_KEY(u, k, m->units, i) { char *u_path, *j_path; const char *id, *description, *load_state, *active_state, *job_type; DBusMessageIter sub2; uint32_t job_id; id = unit_id(u); if (k != id) continue; if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2)) goto oom; description = unit_description(u); load_state = unit_load_state_to_string(u->meta.load_state); active_state = unit_active_state_to_string(unit_active_state(u)); if (!(u_path = unit_dbus_path(u))) goto oom; if (u->meta.job) { job_id = (uint32_t) u->meta.job->id; if (!(j_path = job_dbus_path(u->meta.job))) { free(u_path); goto oom; } job_type = job_type_to_string(u->meta.job->type); } else { job_id = 0; j_path = u_path; job_type = ""; } if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &id) || !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &description) || !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &load_state) || !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &active_state) || !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &u_path) || !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT32, &job_id) || !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &job_type) || !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &j_path)) { free(u_path); if (u->meta.job) free(j_path); goto oom; } free(u_path); if (u->meta.job) free(j_path); if (!dbus_message_iter_close_container(&sub, &sub2)) goto oom; } if (!dbus_message_iter_close_container(&iter, &sub)) goto oom; } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1", "ListJobs")) { DBusMessageIter iter, sub; Iterator i; Job *j; 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, "(usssoo)", &sub)) goto oom; HASHMAP_FOREACH(j, m->jobs, i) { char *u_path, *j_path; const char *unit, *state, *type; uint32_t id; DBusMessageIter sub2; if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2)) goto oom; id = (uint32_t) j->id; unit = unit_id(j->unit); state = job_state_to_string(j->state); type = job_type_to_string(j->type); if (!(j_path = job_dbus_path(j))) goto oom; if (!(u_path = unit_dbus_path(j->unit))) { free(j_path); goto oom; } if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT32, &id) || !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &unit) || !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &type) || !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &state) || !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &j_path) || !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &u_path)) { free(j_path); free(u_path); goto oom; } free(j_path); free(u_path); if (!dbus_message_iter_close_container(&sub, &sub2)) goto oom; } if (!dbus_message_iter_close_container(&iter, &sub)) goto oom; } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1", "Subscribe")) { char *client; if (!(client = strdup(dbus_message_get_sender(message)))) goto oom; r = set_put(m->subscribed, client); if (r < 0) return bus_send_error_reply(m, message, NULL, r); if (!(reply = dbus_message_new_method_return(message))) goto oom; } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1", "Unsubscribe")) { char *client; if (!(client = set_remove(m->subscribed, (char*) dbus_message_get_sender(message)))) return bus_send_error_reply(m, message, NULL, -ENOENT); free(client); if (!(reply = dbus_message_new_method_return(message))) goto oom; } else if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Introspectable", "Introspect")) { char *introspection = NULL; FILE *f; Iterator i; Unit *u; Job *j; const char *k; 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(INTROSPECTION_BEGIN, f); HASHMAP_FOREACH_KEY(u, k, m->units, i) { char *p; if (k != unit_id(u)) continue; if (!(p = bus_path_escape(k))) { fclose(f); free(introspection); goto oom; } fprintf(f, "<node name=\"unit/%s\"/>", p); free(p); } HASHMAP_FOREACH(j, m->jobs, i) fprintf(f, "<node name=\"job/%lu\"/>", (unsigned long) j->id); fputs(INTROSPECTION_END, 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); } else return bus_default_message_handler(m, message, NULL, NULL); free(path); if (reply) { if (!dbus_connection_send(connection, reply, NULL)) goto oom; dbus_message_unref(reply); } return DBUS_HANDLER_RESULT_HANDLED; oom: free(path); if (reply) dbus_message_unref(reply); dbus_error_free(&error); return DBUS_HANDLER_RESULT_NEED_MEMORY; } const DBusObjectPathVTable bus_manager_vtable = { .message_function = bus_manager_message_handler };