/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ /*** This file is part of systemd. Copyright 2011 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 . ***/ #include #include #include #include #include "logind.h" #include "dbus-common.h" #include "strv.h" #include "polkit.h" #include "special.h" #define BUS_MANAGER_INTERFACE \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" \ " \n" #define INTROSPECTION_BEGIN \ DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE \ "\n" \ BUS_MANAGER_INTERFACE \ BUS_PROPERTIES_INTERFACE \ BUS_PEER_INTERFACE \ BUS_INTROSPECTABLE_INTERFACE #define INTROSPECTION_END \ "\n" #define INTERFACES_LIST \ BUS_GENERIC_INTERFACES_LIST \ "org.freedesktop.login1.Manager\0" static int bus_manager_append_idle_hint(DBusMessageIter *i, const char *property, void *data) { Manager *m = data; dbus_bool_t b; assert(i); assert(property); assert(m); b = manager_get_idle_hint(m, NULL) > 0; if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b)) return -ENOMEM; return 0; } static int bus_manager_append_idle_hint_since(DBusMessageIter *i, const char *property, void *data) { Manager *m = data; dual_timestamp t; uint64_t u; assert(i); assert(property); assert(m); manager_get_idle_hint(m, &t); u = streq(property, "IdleSinceHint") ? t.realtime : t.monotonic; if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT64, &u)) return -ENOMEM; return 0; } static int bus_manager_create_session(Manager *m, DBusMessage *message, DBusMessage **_reply) { Session *session = NULL; User *user = NULL; const char *type, *seat, *tty, *display, *remote_user, *remote_host, *service; uint32_t uid, leader, audit_id = 0; dbus_bool_t remote, kill_processes; char **controllers = NULL, **reset_controllers = NULL; SessionType t; Seat *s; DBusMessageIter iter; int r; char *id = NULL, *p; uint32_t vtnr = 0; int fifo_fd = -1; DBusMessage *reply = NULL; bool b; assert(m); assert(message); assert(_reply); if (!dbus_message_iter_init(message, &iter) || dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_UINT32) return -EINVAL; dbus_message_iter_get_basic(&iter, &uid); if (!dbus_message_iter_next(&iter) || dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_UINT32) return -EINVAL; dbus_message_iter_get_basic(&iter, &leader); if (leader <= 0 || !dbus_message_iter_next(&iter) || dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING) return -EINVAL; dbus_message_iter_get_basic(&iter, &service); if (!dbus_message_iter_next(&iter) || dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING) return -EINVAL; dbus_message_iter_get_basic(&iter, &type); t = session_type_from_string(type); if (t < 0 || !dbus_message_iter_next(&iter) || dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING) return -EINVAL; dbus_message_iter_get_basic(&iter, &seat); if (isempty(seat)) s = NULL; else { s = hashmap_get(m->seats, seat); if (!s) return -ENOENT; } if (!dbus_message_iter_next(&iter) || dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_UINT32) return -EINVAL; dbus_message_iter_get_basic(&iter, &vtnr); if (!dbus_message_iter_next(&iter) || dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING) return -EINVAL; dbus_message_iter_get_basic(&iter, &tty); if (tty_is_vc(tty)) { int v; if (!s) s = m->vtconsole; else if (s != m->vtconsole) return -EINVAL; v = vtnr_from_tty(tty); if (v <= 0) return v < 0 ? v : -EINVAL; if (vtnr <= 0) vtnr = (uint32_t) v; else if (vtnr != (uint32_t) v) return -EINVAL; } else if (!isempty(tty) && s && seat_is_vtconsole(s)) return -EINVAL; if (s) { if (seat_is_vtconsole(s)) { if (vtnr <= 0 || vtnr > 63) return -EINVAL; } else { if (vtnr > 0) return -EINVAL; } } if (!dbus_message_iter_next(&iter) || dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING) return -EINVAL; dbus_message_iter_get_basic(&iter, &display); if (!dbus_message_iter_next(&iter) || dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_BOOLEAN) return -EINVAL; dbus_message_iter_get_basic(&iter, &remote); if (!dbus_message_iter_next(&iter) || dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING) return -EINVAL; dbus_message_iter_get_basic(&iter, &remote_user); if (!dbus_message_iter_next(&iter) || dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING) return -EINVAL; dbus_message_iter_get_basic(&iter, &remote_host); if (!dbus_message_iter_next(&iter) || dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY || dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRING) return -EINVAL; r = bus_parse_strv_iter(&iter, &controllers); if (r < 0) return -EINVAL; if (strv_contains(controllers, "systemd") || !dbus_message_iter_next(&iter) || dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY || dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRING) { r = -EINVAL; goto fail; } r = bus_parse_strv_iter(&iter, &reset_controllers); if (r < 0) goto fail; if (strv_contains(reset_controllers, "systemd") || !dbus_message_iter_next(&iter) || dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_BOOLEAN) { r = -EINVAL; goto fail; } dbus_message_iter_get_basic(&iter, &kill_processes); r = manager_add_user_by_uid(m, uid, &user); if (r < 0) goto fail; audit_session_from_pid(leader, &audit_id); if (audit_id > 0) { asprintf(&id, "%lu", (unsigned long) audit_id); if (!id) { r = -ENOMEM; goto fail; } session = hashmap_get(m->sessions, id); if (session) { fifo_fd = session_create_fifo(session); if (fifo_fd < 0) { r = fifo_fd; goto fail; } /* Session already exists, client is probably * something like "su" which changes uid but * is still the same audit session */ reply = dbus_message_new_method_return(message); if (!reply) { r = -ENOMEM; goto fail; } p = session_bus_path(session); if (!p) { r = -ENOMEM; goto fail; } b = dbus_message_append_args( reply, DBUS_TYPE_STRING, &session->id, DBUS_TYPE_OBJECT_PATH, &p, DBUS_TYPE_STRING, &session->user->runtime_path, DBUS_TYPE_UNIX_FD, &fifo_fd, DBUS_TYPE_INVALID); free(p); if (!b) { r = -ENOMEM; goto fail; } close_nointr_nofail(fifo_fd); *_reply = reply; return 0; } } else { do { free(id); asprintf(&id, "c%lu", ++m->session_counter); if (!id) { r = -ENOMEM; goto fail; } } while (hashmap_get(m->sessions, id)); } r = manager_add_session(m, user, id, &session); free(id); if (r < 0) goto fail; session->leader = leader; session->audit_id = audit_id; session->type = t; session->remote = remote; session->controllers = controllers; session->reset_controllers = reset_controllers; session->kill_processes = kill_processes; session->vtnr = vtnr; controllers = reset_controllers = NULL; if (!isempty(tty)) { session->tty = strdup(tty); if (!session->tty) { r = -ENOMEM; goto fail; } } if (!isempty(display)) { session->display = strdup(display); if (!session->display) { r = -ENOMEM; goto fail; } } if (!isempty(remote_user)) { session->remote_user = strdup(remote_user); if (!session->remote_user) { r = -ENOMEM; goto fail; } } if (!isempty(remote_host)) { session->remote_host = strdup(remote_host); if (!session->remote_host) { r = -ENOMEM; goto fail; } } if (!isempty(service)) { session->service = strdup(service); if (!session->service) { r = -ENOMEM; goto fail; } } fifo_fd = session_create_fifo(session); if (fifo_fd < 0) { r = fifo_fd; goto fail; } if (s) { r = seat_attach_session(s, session); if (r < 0) goto fail; } r = session_start(session); if (r < 0) goto fail; reply = dbus_message_new_method_return(message); if (!reply) { r = -ENOMEM; goto fail; } p = session_bus_path(session); if (!p) { r = -ENOMEM; goto fail; } b = dbus_message_append_args( reply, DBUS_TYPE_STRING, &session->id, DBUS_TYPE_OBJECT_PATH, &p, DBUS_TYPE_STRING, &session->user->runtime_path, DBUS_TYPE_UNIX_FD, &fifo_fd, DBUS_TYPE_INVALID); free(p); if (!b) { r = -ENOMEM; goto fail; } close_nointr_nofail(fifo_fd); *_reply = reply; return 0; fail: strv_free(controllers); strv_free(reset_controllers); if (session) session_add_to_gc_queue(session); if (user) user_add_to_gc_queue(user); if (fifo_fd >= 0) close_nointr_nofail(fifo_fd); if (reply) dbus_message_unref(reply); return r; } static int trigger_device(Manager *m, struct udev_device *d) { struct udev_enumerate *e; struct udev_list_entry *first, *item; int r; assert(m); e = udev_enumerate_new(m->udev); if (!e) { r = -ENOMEM; goto finish; } if (d) { if (udev_enumerate_add_match_parent(e, d) < 0) { r = -EIO; goto finish; } } if (udev_enumerate_scan_devices(e) < 0) { r = -EIO; goto finish; } first = udev_enumerate_get_list_entry(e); udev_list_entry_foreach(item, first) { char *t; const char *p; p = udev_list_entry_get_name(item); t = strappend(p, "/uevent"); if (!t) { r = -ENOMEM; goto finish; } write_one_line_file(t, "change"); free(t); } r = 0; finish: if (e) udev_enumerate_unref(e); return r; } static int attach_device(Manager *m, const char *seat, const char *sysfs) { struct udev_device *d; char *rule = NULL, *file = NULL; const char *id_for_seat; int r; assert(m); assert(seat); assert(sysfs); d = udev_device_new_from_syspath(m->udev, sysfs); if (!d) return -ENODEV; if (!udev_device_has_tag(d, "seat")) { r = -ENODEV; goto finish; } id_for_seat = udev_device_get_property_value(d, "ID_FOR_SEAT"); if (!id_for_seat) { r = -ENODEV; goto finish; } if (asprintf(&file, "/etc/udev/rules.d/72-seat-%s.rules", id_for_seat) < 0) { r = -ENOMEM; goto finish; } if (asprintf(&rule, "TAG==\"seat\", ENV{ID_FOR_SEAT}==\"%s\", ENV{ID_SEAT}=\"%s\"", id_for_seat, seat) < 0) { r = -ENOMEM; goto finish; } mkdir_p("/etc/udev/rules.d", 0755); r = write_one_line_file_atomic(file, rule); if (r < 0) goto finish; r = trigger_device(m, d); finish: free(rule); free(file); if (d) udev_device_unref(d); return r; } static int flush_devices(Manager *m) { DIR *d; assert(m); d = opendir("/etc/udev/rules.d"); if (!d) { if (errno != ENOENT) log_warning("Failed to open /etc/udev/rules.d: %m"); } else { struct dirent *de; while ((de = readdir(d))) { if (!dirent_is_file(de)) continue; if (!startswith(de->d_name, "72-seat-")) continue; if (!endswith(de->d_name, ".rules")) continue; if (unlinkat(dirfd(d), de->d_name, 0) < 0) log_warning("Failed to unlink %s: %m", de->d_name); } closedir(d); } return trigger_device(m, NULL); } static DBusHandlerResult manager_message_handler( DBusConnection *connection, DBusMessage *message, void *userdata) { Manager *m = userdata; const BusProperty properties[] = { { "org.freedesktop.login1.Manager", "ControlGroupHierarchy", bus_property_append_string, "s", m->cgroup_path }, { "org.freedesktop.login1.Manager", "Controllers", bus_property_append_strv, "as", m->controllers }, { "org.freedesktop.login1.Manager", "ResetControllers", bus_property_append_strv, "as", m->reset_controllers }, { "org.freedesktop.login1.Manager", "NAutoVTs", bus_property_append_unsigned, "u", &m->n_autovts }, { "org.freedesktop.login1.Manager", "KillOnlyUsers", bus_property_append_strv, "as", m->kill_only_users }, { "org.freedesktop.login1.Manager", "KillExcludeUsers", bus_property_append_strv, "as", m->kill_exclude_users }, { "org.freedesktop.login1.Manager", "KillUserProcesses", bus_property_append_bool, "b", &m->kill_user_processes }, { "org.freedesktop.login1.Manager", "IdleHint", bus_manager_append_idle_hint, "b", m }, { "org.freedesktop.login1.Manager", "IdleSinceHint", bus_manager_append_idle_hint_since, "t", m }, { "org.freedesktop.login1.Manager", "IdleSinceHintMonotonic", bus_manager_append_idle_hint_since, "t", m }, { NULL, NULL, NULL, NULL, NULL } }; DBusError error; DBusMessage *reply = NULL; int r; assert(connection); assert(message); assert(m); dbus_error_init(&error); if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "GetSession")) { const char *name; char *p; Session *session; bool b; if (!dbus_message_get_args( message, &error, DBUS_TYPE_STRING, &name, DBUS_TYPE_INVALID)) return bus_send_error_reply(connection, message, &error, -EINVAL); session = hashmap_get(m->sessions, name); if (!session) return bus_send_error_reply(connection, message, &error, -ENOENT); reply = dbus_message_new_method_return(message); if (!reply) goto oom; p = session_bus_path(session); if (!p) goto oom; b = dbus_message_append_args( reply, DBUS_TYPE_OBJECT_PATH, &p, DBUS_TYPE_INVALID); free(p); if (!b) goto oom; } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "GetUser")) { uint32_t uid; char *p; User *user; bool b; if (!dbus_message_get_args( message, &error, DBUS_TYPE_UINT32, &uid, DBUS_TYPE_INVALID)) return bus_send_error_reply(connection, message, &error, -EINVAL); user = hashmap_get(m->users, ULONG_TO_PTR((unsigned long) uid)); if (!user) return bus_send_error_reply(connection, message, &error, -ENOENT); reply = dbus_message_new_method_return(message); if (!reply) goto oom; p = user_bus_path(user); if (!p) goto oom; b = dbus_message_append_args( reply, DBUS_TYPE_OBJECT_PATH, &p, DBUS_TYPE_INVALID); free(p); if (!b) goto oom; } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "GetSeat")) { const char *name; char *p; Seat *seat; bool b; if (!dbus_message_get_args( message, &error, DBUS_TYPE_STRING, &name, DBUS_TYPE_INVALID)) return bus_send_error_reply(connection, message, &error, -EINVAL); seat = hashmap_get(m->seats, name); if (!seat) return bus_send_error_reply(connection, message, &error, -ENOENT); reply = dbus_message_new_method_return(message); if (!reply) goto oom; p = seat_bus_path(seat); if (!p) goto oom; b = dbus_message_append_args( reply, DBUS_TYPE_OBJECT_PATH, &p, DBUS_TYPE_INVALID); free(p); if (!b) goto oom; } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "ListSessions")) { char *p; Session *session; Iterator i; DBusMessageIter iter, sub; const char *empty = ""; reply = dbus_message_new_method_return(message); if (!reply) goto oom; dbus_message_iter_init_append(reply, &iter); if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(susso)", &sub)) goto oom; HASHMAP_FOREACH(session, m->sessions, i) { DBusMessageIter sub2; uint32_t uid; if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2)) goto oom; uid = session->user->uid; p = session_bus_path(session); if (!p) goto oom; if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &session->id) || !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT32, &uid) || !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &session->user->name) || !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, session->seat ? (const char**) &session->seat->id : &empty) || !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &p)) { free(p); goto oom; } free(p); 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.login1.Manager", "ListUsers")) { char *p; User *user; Iterator i; DBusMessageIter iter, sub; reply = dbus_message_new_method_return(message); if (!reply) goto oom; dbus_message_iter_init_append(reply, &iter); if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(uso)", &sub)) goto oom; HASHMAP_FOREACH(user, m->users, i) { DBusMessageIter sub2; uint32_t uid; if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2)) goto oom; uid = user->uid; p = user_bus_path(user); if (!p) goto oom; if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT32, &uid) || !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &user->name) || !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &p)) { free(p); goto oom; } free(p); 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.login1.Manager", "ListSeats")) { char *p; Seat *seat; Iterator i; DBusMessageIter iter, sub; reply = dbus_message_new_method_return(message); if (!reply) goto oom; dbus_message_iter_init_append(reply, &iter); if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(so)", &sub)) goto oom; HASHMAP_FOREACH(seat, m->seats, i) { DBusMessageIter sub2; if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2)) goto oom; p = seat_bus_path(seat); if (!p) goto oom; if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &seat->id) || !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &p)) { free(p); goto oom; } free(p); 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.login1.Manager", "CreateSession")) { r = bus_manager_create_session(m, message, &reply); if (r == -ENOMEM) goto oom; if (r < 0) return bus_send_error_reply(connection, message, &error, r); } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "ActivateSession")) { const char *name; Session *session; if (!dbus_message_get_args( message, &error, DBUS_TYPE_STRING, &name, DBUS_TYPE_INVALID)) return bus_send_error_reply(connection, message, &error, -EINVAL); session = hashmap_get(m->sessions, name); if (!session) return bus_send_error_reply(connection, message, &error, -ENOENT); r = session_activate(session); if (r < 0) return bus_send_error_reply(connection, message, NULL, r); reply = dbus_message_new_method_return(message); if (!reply) goto oom; } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "LockSession") || dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "UnlockSession")) { const char *name; Session *session; if (!dbus_message_get_args( message, &error, DBUS_TYPE_STRING, &name, DBUS_TYPE_INVALID)) return bus_send_error_reply(connection, message, &error, -EINVAL); session = hashmap_get(m->sessions, name); if (!session) return bus_send_error_reply(connection, message, &error, -ENOENT); if (session_send_lock(session, streq(dbus_message_get_member(message), "LockSession")) < 0) goto oom; reply = dbus_message_new_method_return(message); if (!reply) goto oom; } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "KillSession")) { const char *swho; int32_t signo; KillWho who; const char *name; Session *session; if (!dbus_message_get_args( message, &error, DBUS_TYPE_STRING, &name, DBUS_TYPE_STRING, &swho, DBUS_TYPE_INT32, &signo, DBUS_TYPE_INVALID)) return bus_send_error_reply(connection, message, &error, -EINVAL); if (isempty(swho)) who = KILL_ALL; else { who = kill_who_from_string(swho); if (who < 0) return bus_send_error_reply(connection, message, &error, -EINVAL); } if (signo <= 0 || signo >= _NSIG) return bus_send_error_reply(connection, message, &error, -EINVAL); session = hashmap_get(m->sessions, name); if (!session) return bus_send_error_reply(connection, message, &error, -ENOENT); r = session_kill(session, who, signo); if (r < 0) return bus_send_error_reply(connection, message, NULL, r); reply = dbus_message_new_method_return(message); if (!reply) goto oom; } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "KillUser")) { uint32_t uid; User *user; int32_t signo; if (!dbus_message_get_args( message, &error, DBUS_TYPE_UINT32, &uid, DBUS_TYPE_INT32, &signo, DBUS_TYPE_INVALID)) return bus_send_error_reply(connection, message, &error, -EINVAL); if (signo <= 0 || signo >= _NSIG) return bus_send_error_reply(connection, message, &error, -EINVAL); user = hashmap_get(m->users, ULONG_TO_PTR((unsigned long) uid)); if (!user) return bus_send_error_reply(connection, message, &error, -ENOENT); r = user_kill(user, signo); if (r < 0) return bus_send_error_reply(connection, message, NULL, r); reply = dbus_message_new_method_return(message); if (!reply) goto oom; } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "TerminateSession")) { const char *name; Session *session; if (!dbus_message_get_args( message, &error, DBUS_TYPE_STRING, &name, DBUS_TYPE_INVALID)) return bus_send_error_reply(connection, message, &error, -EINVAL); session = hashmap_get(m->sessions, name); if (!session) return bus_send_error_reply(connection, message, &error, -ENOENT); r = session_stop(session); if (r < 0) return bus_send_error_reply(connection, message, NULL, r); reply = dbus_message_new_method_return(message); if (!reply) goto oom; } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "TerminateUser")) { uint32_t uid; User *user; if (!dbus_message_get_args( message, &error, DBUS_TYPE_UINT32, &uid, DBUS_TYPE_INVALID)) return bus_send_error_reply(connection, message, &error, -EINVAL); user = hashmap_get(m->users, ULONG_TO_PTR((unsigned long) uid)); if (!user) return bus_send_error_reply(connection, message, &error, -ENOENT); r = user_stop(user); if (r < 0) return bus_send_error_reply(connection, message, NULL, r); reply = dbus_message_new_method_return(message); if (!reply) goto oom; } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "TerminateSeat")) { const char *name; Seat *seat; if (!dbus_message_get_args( message, &error, DBUS_TYPE_STRING, &name, DBUS_TYPE_INVALID)) return bus_send_error_reply(connection, message, &error, -EINVAL); seat = hashmap_get(m->seats, name); if (!seat) return bus_send_error_reply(connection, message, &error, -ENOENT); r = seat_stop_sessions(seat); if (r < 0) return bus_send_error_reply(connection, message, NULL, r); reply = dbus_message_new_method_return(message); if (!reply) goto oom; } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "SetUserLinger")) { uint32_t uid; struct passwd *pw; dbus_bool_t b, interactive; char *path; if (!dbus_message_get_args( message, &error, DBUS_TYPE_UINT32, &uid, DBUS_TYPE_BOOLEAN, &b, DBUS_TYPE_BOOLEAN, &interactive, DBUS_TYPE_INVALID)) return bus_send_error_reply(connection, message, &error, -EINVAL); errno = 0; pw = getpwuid(uid); if (!pw) return bus_send_error_reply(connection, message, NULL, errno ? -errno : -EINVAL); r = verify_polkit(connection, message, "org.freedesktop.login1.set-user-linger", interactive, &error); if (r < 0) return bus_send_error_reply(connection, message, &error, r); r = safe_mkdir("/var/lib/systemd/linger", 0755, 0, 0); if (r < 0) return bus_send_error_reply(connection, message, &error, r); path = strappend("/var/lib/systemd/linger/", pw->pw_name); if (!path) goto oom; if (b) { User *u; r = touch(path); free(path); if (r < 0) return bus_send_error_reply(connection, message, &error, r); if (manager_add_user_by_uid(m, uid, &u) >= 0) user_start(u); } else { User *u; r = unlink(path); free(path); if (r < 0 && errno != ENOENT) return bus_send_error_reply(connection, message, &error, -errno); u = hashmap_get(m->users, ULONG_TO_PTR((unsigned long) uid)); if (u) user_add_to_gc_queue(u); } reply = dbus_message_new_method_return(message); if (!reply) goto oom; } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "AttachDevice")) { const char *sysfs, *seat; dbus_bool_t interactive; if (!dbus_message_get_args( message, &error, DBUS_TYPE_STRING, &seat, DBUS_TYPE_STRING, &sysfs, DBUS_TYPE_BOOLEAN, &interactive, DBUS_TYPE_INVALID)) return bus_send_error_reply(connection, message, &error, -EINVAL); if (!path_startswith(sysfs, "/sys") || !seat_name_is_valid(seat)) return bus_send_error_reply(connection, message, NULL, -EINVAL); r = verify_polkit(connection, message, "org.freedesktop.login1.attach-device", interactive, &error); if (r < 0) return bus_send_error_reply(connection, message, &error, r); r = attach_device(m, seat, sysfs); if (r < 0) return bus_send_error_reply(connection, message, NULL, -EINVAL); reply = dbus_message_new_method_return(message); if (!reply) goto oom; } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "FlushDevices")) { dbus_bool_t interactive; if (!dbus_message_get_args( message, &error, DBUS_TYPE_BOOLEAN, &interactive, DBUS_TYPE_INVALID)) return bus_send_error_reply(connection, message, &error, -EINVAL); r = verify_polkit(connection, message, "org.freedesktop.login1.flush-devices", interactive, &error); if (r < 0) return bus_send_error_reply(connection, message, &error, r); r = flush_devices(m); if (r < 0) return bus_send_error_reply(connection, message, NULL, -EINVAL); reply = dbus_message_new_method_return(message); if (!reply) goto oom; } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "PowerOff") || dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "Reboot")) { dbus_bool_t interactive; bool multiple_sessions; DBusMessage *forward, *freply; const char *name; const char *mode = "replace"; const char *action; if (!dbus_message_get_args( message, &error, DBUS_TYPE_BOOLEAN, &interactive, DBUS_TYPE_INVALID)) return bus_send_error_reply(connection, message, &error, -EINVAL); multiple_sessions = hashmap_size(m->sessions) > 1; if (!multiple_sessions) { Session *s; /* Hmm, there's only one session, but let's * make sure it actually belongs to the user * who is asking. If not, better be safe than * sorry. */ s = hashmap_first(m->sessions); if (s) { unsigned long ul; ul = dbus_bus_get_unix_user(connection, dbus_message_get_sender(message), &error); if (ul == (unsigned long) -1) return bus_send_error_reply(connection, message, &error, -EIO); multiple_sessions = s->user->uid != ul; } } if (streq(dbus_message_get_member(message), "PowerOff")) { if (multiple_sessions) action = "org.freedesktop.login1.power-off-multiple-sessions"; else action = "org.freedesktop.login1.power-off"; name = SPECIAL_POWEROFF_TARGET; } else { if (multiple_sessions) action = "org.freedesktop.login1.reboot-multiple-sessions"; else action = "org.freedesktop.login1.reboot"; name = SPECIAL_REBOOT_TARGET; } r = verify_polkit(connection, message, action, interactive, &error); if (r < 0) return bus_send_error_reply(connection, message, &error, r); forward = dbus_message_new_method_call( "org.freedesktop.systemd1", "/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "StartUnit"); if (!forward) return bus_send_error_reply(connection, message, NULL, -ENOMEM); if (!dbus_message_append_args(forward, DBUS_TYPE_STRING, &name, DBUS_TYPE_STRING, &mode, DBUS_TYPE_INVALID)) { dbus_message_unref(forward); return bus_send_error_reply(connection, message, NULL, -ENOMEM); } freply = dbus_connection_send_with_reply_and_block(connection, forward, -1, &error); dbus_message_unref(forward); if (!freply) return bus_send_error_reply(connection, message, &error, -EIO); dbus_message_unref(freply); reply = dbus_message_new_method_return(message); if (!reply) goto oom; } else if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Introspectable", "Introspect")) { char *introspection = NULL; FILE *f; Iterator i; Session *session; Seat *seat; User *user; size_t size; char *p; 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(seat, m->seats, i) { p = bus_path_escape(seat->id); if (p) { fprintf(f, "", p); free(p); } } HASHMAP_FOREACH(user, m->users, i) fprintf(f, "", (unsigned long long) user->uid); HASHMAP_FOREACH(session, m->sessions, i) { p = bus_path_escape(session->id); if (p) { fprintf(f, "", p); free(p); } } 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(connection, message, NULL, INTERFACES_LIST, 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); dbus_error_free(&error); return DBUS_HANDLER_RESULT_NEED_MEMORY; } const DBusObjectPathVTable bus_manager_vtable = { .message_function = manager_message_handler }; DBusHandlerResult bus_message_filter( DBusConnection *connection, DBusMessage *message, void *userdata) { Manager *m = userdata; DBusError error; assert(m); assert(connection); assert(message); dbus_error_init(&error); 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", bus_error_message(&error)); else manager_cgroup_notify_empty(m, cgroup); } dbus_error_free(&error); return DBUS_HANDLER_RESULT_NOT_YET_HANDLED; } int manager_send_changed(Manager *manager, const char *properties) { DBusMessage *m; int r = -ENOMEM; assert(manager); m = bus_properties_changed_new("/org/freedesktop/login1", "org.freedesktop.login1.Manager", properties); if (!m) goto finish; if (!dbus_connection_send(manager->bus, m, NULL)) goto finish; r = 0; finish: if (m) dbus_message_unref(m); return r; }