/* SPDX-License-Identifier: LGPL-2.1-or-later */ #include #include #include #include "sd-device.h" #include "sd-messages.h" #include "alloc-util.h" #include "audit-util.h" #include "bootspec.h" #include "bus-common-errors.h" #include "bus-error.h" #include "bus-get-properties.h" #include "bus-locator.h" #include "bus-polkit.h" #include "bus-unit-util.h" #include "bus-util.h" #include "cgroup-util.h" #include "device-util.h" #include "dirent-util.h" #include "efi-api.h" #include "efi-loader.h" #include "efivars.h" #include "env-file.h" #include "env-util.h" #include "escape.h" #include "event-util.h" #include "fd-util.h" #include "fileio-label.h" #include "fileio.h" #include "format-util.h" #include "fs-util.h" #include "logind-action.h" #include "logind-dbus.h" #include "logind-polkit.h" #include "logind-seat-dbus.h" #include "logind-session-dbus.h" #include "logind-user-dbus.h" #include "logind.h" #include "missing_capability.h" #include "mkdir-label.h" #include "parse-util.h" #include "path-util.h" #include "process-util.h" #include "reboot-util.h" #include "selinux-util.h" #include "sleep-config.h" #include "special.h" #include "serialize.h" #include "stdio-util.h" #include "strv.h" #include "terminal-util.h" #include "tmpfile-util.h" #include "unit-name.h" #include "user-util.h" #include "utmp-wtmp.h" #include "virt.h" /* As a random fun fact sysvinit had a 252 (256-(strlen(" \r\n")+1)) * character limit for the wall message. * https://git.savannah.nongnu.org/cgit/sysvinit.git/tree/src/shutdown.c#n72 * There is no real technical need for that but doesn't make sense * to store arbitrary amounts either. As we are not stingy here, we * allow 4k. */ #define WALL_MESSAGE_MAX 4096U #define SHUTDOWN_SCHEDULE_FILE "/run/systemd/shutdown/scheduled" static int update_schedule_file(Manager *m); static void reset_scheduled_shutdown(Manager *m); static int manager_setup_shutdown_timers(Manager* m); static int get_sender_session( Manager *m, sd_bus_message *message, bool consult_display, sd_bus_error *error, Session **ret) { _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL; Session *session = NULL; const char *name; int r; /* Acquire the sender's session. This first checks if the sending process is inside a session itself, * and returns that. If not and 'consult_display' is true, this returns the display session of the * owning user of the caller. */ r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_SESSION|SD_BUS_CREDS_AUGMENT| (consult_display ? SD_BUS_CREDS_OWNER_UID : 0), &creds); if (r < 0) return r; r = sd_bus_creds_get_session(creds, &name); if (r < 0) { if (r != -ENXIO) return r; if (consult_display) { uid_t uid; r = sd_bus_creds_get_owner_uid(creds, &uid); if (r < 0) { if (r != -ENXIO) return r; } else { User *user; user = hashmap_get(m->users, UID_TO_PTR(uid)); if (user) session = user->display; } } } else session = hashmap_get(m->sessions, name); if (!session) return sd_bus_error_setf(error, BUS_ERROR_NO_SESSION_FOR_PID, consult_display ? "Caller does not belong to any known session and doesn't own any suitable session." : "Caller does not belong to any known session."); *ret = session; return 0; } int manager_get_session_from_creds( Manager *m, sd_bus_message *message, const char *name, sd_bus_error *error, Session **ret) { Session *session; assert(m); assert(ret); if (SEAT_IS_SELF(name)) /* the caller's own session */ return get_sender_session(m, message, false, error, ret); if (SEAT_IS_AUTO(name)) /* The caller's own session if they have one, otherwise their user's display session */ return get_sender_session(m, message, true, error, ret); session = hashmap_get(m->sessions, name); if (!session) return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SESSION, "No session '%s' known", name); *ret = session; return 0; } static int get_sender_user(Manager *m, sd_bus_message *message, sd_bus_error *error, User **ret) { _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL; uid_t uid; User *user; int r; /* Note that we get the owner UID of the session, not the actual client UID here! */ r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_OWNER_UID|SD_BUS_CREDS_AUGMENT, &creds); if (r < 0) return r; r = sd_bus_creds_get_owner_uid(creds, &uid); if (r < 0) { if (r != -ENXIO) return r; user = NULL; } else user = hashmap_get(m->users, UID_TO_PTR(uid)); if (!user) return sd_bus_error_setf(error, BUS_ERROR_NO_USER_FOR_PID, "Caller does not belong to any logged in or lingering user"); *ret = user; return 0; } int manager_get_user_from_creds(Manager *m, sd_bus_message *message, uid_t uid, sd_bus_error *error, User **ret) { User *user; assert(m); assert(ret); if (!uid_is_valid(uid)) return get_sender_user(m, message, error, ret); user = hashmap_get(m->users, UID_TO_PTR(uid)); if (!user) return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_USER, "User ID "UID_FMT" is not logged in or lingering", uid); *ret = user; return 0; } int manager_get_seat_from_creds( Manager *m, sd_bus_message *message, const char *name, sd_bus_error *error, Seat **ret) { Seat *seat; int r; assert(m); assert(ret); if (SEAT_IS_SELF(name) || SEAT_IS_AUTO(name)) { Session *session; /* Use these special seat names as session names */ r = manager_get_session_from_creds(m, message, name, error, &session); if (r < 0) return r; seat = session->seat; if (!seat) return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT, "Session '%s' has no seat.", session->id); } else { seat = hashmap_get(m->seats, name); if (!seat) return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT, "No seat '%s' known", name); } *ret = seat; return 0; } static int return_test_polkit( sd_bus_message *message, int capability, const char *action, const char **details, uid_t good_user, sd_bus_error *e) { const char *result; bool challenge; int r; r = bus_test_polkit(message, capability, action, details, good_user, &challenge, e); if (r < 0) return r; if (r > 0) result = "yes"; else if (challenge) result = "challenge"; else result = "no"; return sd_bus_reply_method_return(message, "s", result); } static int property_get_idle_hint( sd_bus *bus, const char *path, const char *interface, const char *property, sd_bus_message *reply, void *userdata, sd_bus_error *error) { Manager *m = ASSERT_PTR(userdata); assert(bus); assert(reply); return sd_bus_message_append(reply, "b", manager_get_idle_hint(m, NULL) > 0); } static int property_get_idle_since_hint( sd_bus *bus, const char *path, const char *interface, const char *property, sd_bus_message *reply, void *userdata, sd_bus_error *error) { Manager *m = ASSERT_PTR(userdata); dual_timestamp t = DUAL_TIMESTAMP_NULL; assert(bus); assert(reply); manager_get_idle_hint(m, &t); return sd_bus_message_append(reply, "t", streq(property, "IdleSinceHint") ? t.realtime : t.monotonic); } static int property_get_inhibited( sd_bus *bus, const char *path, const char *interface, const char *property, sd_bus_message *reply, void *userdata, sd_bus_error *error) { Manager *m = ASSERT_PTR(userdata); InhibitWhat w; assert(bus); assert(reply); w = manager_inhibit_what(m, streq(property, "BlockInhibited") ? INHIBIT_BLOCK : INHIBIT_DELAY); return sd_bus_message_append(reply, "s", inhibit_what_to_string(w)); } static int property_get_preparing( sd_bus *bus, const char *path, const char *interface, const char *property, sd_bus_message *reply, void *userdata, sd_bus_error *error) { Manager *m = ASSERT_PTR(userdata); bool b = false; assert(bus); assert(reply); if (m->delayed_action) { if (streq(property, "PreparingForShutdown")) b = m->delayed_action->inhibit_what & INHIBIT_SHUTDOWN; else b = m->delayed_action->inhibit_what & INHIBIT_SLEEP; } return sd_bus_message_append(reply, "b", b); } static int property_get_scheduled_shutdown( sd_bus *bus, const char *path, const char *interface, const char *property, sd_bus_message *reply, void *userdata, sd_bus_error *error) { Manager *m = ASSERT_PTR(userdata); int r; assert(bus); assert(reply); r = sd_bus_message_open_container(reply, 'r', "st"); if (r < 0) return r; r = sd_bus_message_append(reply, "st", m->scheduled_shutdown_action ? handle_action_to_string(m->scheduled_shutdown_action->handle) : NULL, m->scheduled_shutdown_timeout); if (r < 0) return r; return sd_bus_message_close_container(reply); } static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_handle_action, handle_action, HandleAction); static BUS_DEFINE_PROPERTY_GET(property_get_docked, "b", Manager, manager_is_docked_or_external_displays); static BUS_DEFINE_PROPERTY_GET(property_get_lid_closed, "b", Manager, manager_is_lid_closed); static BUS_DEFINE_PROPERTY_GET_GLOBAL(property_get_on_external_power, "b", manager_is_on_external_power()); static BUS_DEFINE_PROPERTY_GET_GLOBAL(property_get_compat_user_tasks_max, "t", CGROUP_LIMIT_MAX); static BUS_DEFINE_PROPERTY_GET_REF(property_get_hashmap_size, "t", Hashmap *, (uint64_t) hashmap_size); static int method_get_session(sd_bus_message *message, void *userdata, sd_bus_error *error) { _cleanup_free_ char *p = NULL; Manager *m = ASSERT_PTR(userdata); const char *name; Session *session; int r; assert(message); r = sd_bus_message_read(message, "s", &name); if (r < 0) return r; r = manager_get_session_from_creds(m, message, name, error, &session); if (r < 0) return r; p = session_bus_path(session); if (!p) return -ENOMEM; return sd_bus_reply_method_return(message, "o", p); } /* Get login session of a process. This is not what you are looking for these days, * as apps may instead belong to a user service unit. This includes terminal * emulators and hence command-line apps. */ static int method_get_session_by_pid(sd_bus_message *message, void *userdata, sd_bus_error *error) { _cleanup_free_ char *p = NULL; Session *session = NULL; Manager *m = ASSERT_PTR(userdata); pid_t pid; int r; assert(message); assert_cc(sizeof(pid_t) == sizeof(uint32_t)); r = sd_bus_message_read(message, "u", &pid); if (r < 0) return r; if (pid < 0) return -EINVAL; if (pid == 0) { r = manager_get_session_from_creds(m, message, NULL, error, &session); if (r < 0) return r; } else { r = manager_get_session_by_pid(m, pid, &session); if (r < 0) return r; if (!session) return sd_bus_error_setf(error, BUS_ERROR_NO_SESSION_FOR_PID, "PID "PID_FMT" does not belong to any known session", pid); } p = session_bus_path(session); if (!p) return -ENOMEM; return sd_bus_reply_method_return(message, "o", p); } static int method_get_user(sd_bus_message *message, void *userdata, sd_bus_error *error) { _cleanup_free_ char *p = NULL; Manager *m = ASSERT_PTR(userdata); uint32_t uid; User *user; int r; assert(message); r = sd_bus_message_read(message, "u", &uid); if (r < 0) return r; r = manager_get_user_from_creds(m, message, uid, error, &user); if (r < 0) return r; p = user_bus_path(user); if (!p) return -ENOMEM; return sd_bus_reply_method_return(message, "o", p); } static int method_get_user_by_pid(sd_bus_message *message, void *userdata, sd_bus_error *error) { _cleanup_free_ char *p = NULL; Manager *m = ASSERT_PTR(userdata); User *user = NULL; pid_t pid; int r; assert(message); assert_cc(sizeof(pid_t) == sizeof(uint32_t)); r = sd_bus_message_read(message, "u", &pid); if (r < 0) return r; if (pid < 0) return -EINVAL; if (pid == 0) { r = manager_get_user_from_creds(m, message, UID_INVALID, error, &user); if (r < 0) return r; } else { r = manager_get_user_by_pid(m, pid, &user); if (r < 0) return r; if (!user) return sd_bus_error_setf(error, BUS_ERROR_NO_USER_FOR_PID, "PID "PID_FMT" does not belong to any logged in user or lingering user", pid); } p = user_bus_path(user); if (!p) return -ENOMEM; return sd_bus_reply_method_return(message, "o", p); } static int method_get_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) { _cleanup_free_ char *p = NULL; Manager *m = ASSERT_PTR(userdata); const char *name; Seat *seat; int r; assert(message); r = sd_bus_message_read(message, "s", &name); if (r < 0) return r; r = manager_get_seat_from_creds(m, message, name, error, &seat); if (r < 0) return r; p = seat_bus_path(seat); if (!p) return -ENOMEM; return sd_bus_reply_method_return(message, "o", p); } static int method_list_sessions(sd_bus_message *message, void *userdata, sd_bus_error *error) { _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; Manager *m = ASSERT_PTR(userdata); Session *session; int r; assert(message); r = sd_bus_message_new_method_return(message, &reply); if (r < 0) return r; r = sd_bus_message_open_container(reply, 'a', "(susso)"); if (r < 0) return r; HASHMAP_FOREACH(session, m->sessions) { _cleanup_free_ char *p = NULL; p = session_bus_path(session); if (!p) return -ENOMEM; r = sd_bus_message_append(reply, "(susso)", session->id, (uint32_t) session->user->user_record->uid, session->user->user_record->user_name, session->seat ? session->seat->id : "", p); if (r < 0) return r; } r = sd_bus_message_close_container(reply); if (r < 0) return r; return sd_bus_send(NULL, reply, NULL); } static int method_list_users(sd_bus_message *message, void *userdata, sd_bus_error *error) { _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; Manager *m = ASSERT_PTR(userdata); User *user; int r; assert(message); r = sd_bus_message_new_method_return(message, &reply); if (r < 0) return r; r = sd_bus_message_open_container(reply, 'a', "(uso)"); if (r < 0) return r; HASHMAP_FOREACH(user, m->users) { _cleanup_free_ char *p = NULL; p = user_bus_path(user); if (!p) return -ENOMEM; r = sd_bus_message_append(reply, "(uso)", (uint32_t) user->user_record->uid, user->user_record->user_name, p); if (r < 0) return r; } r = sd_bus_message_close_container(reply); if (r < 0) return r; return sd_bus_send(NULL, reply, NULL); } static int method_list_seats(sd_bus_message *message, void *userdata, sd_bus_error *error) { _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; Manager *m = ASSERT_PTR(userdata); Seat *seat; int r; assert(message); r = sd_bus_message_new_method_return(message, &reply); if (r < 0) return r; r = sd_bus_message_open_container(reply, 'a', "(so)"); if (r < 0) return r; HASHMAP_FOREACH(seat, m->seats) { _cleanup_free_ char *p = NULL; p = seat_bus_path(seat); if (!p) return -ENOMEM; r = sd_bus_message_append(reply, "(so)", seat->id, p); if (r < 0) return r; } r = sd_bus_message_close_container(reply); if (r < 0) return r; return sd_bus_send(NULL, reply, NULL); } static int method_list_inhibitors(sd_bus_message *message, void *userdata, sd_bus_error *error) { _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; Manager *m = ASSERT_PTR(userdata); Inhibitor *inhibitor; int r; assert(message); r = sd_bus_message_new_method_return(message, &reply); if (r < 0) return r; r = sd_bus_message_open_container(reply, 'a', "(ssssuu)"); if (r < 0) return r; HASHMAP_FOREACH(inhibitor, m->inhibitors) { r = sd_bus_message_append(reply, "(ssssuu)", strempty(inhibit_what_to_string(inhibitor->what)), strempty(inhibitor->who), strempty(inhibitor->why), strempty(inhibit_mode_to_string(inhibitor->mode)), (uint32_t) inhibitor->uid, (uint32_t) inhibitor->pid); if (r < 0) return r; } r = sd_bus_message_close_container(reply); if (r < 0) return r; return sd_bus_send(NULL, reply, NULL); } static int method_create_session(sd_bus_message *message, void *userdata, sd_bus_error *error) { const char *service, *type, *class, *cseat, *tty, *display, *remote_user, *remote_host, *desktop; _cleanup_free_ char *id = NULL; Session *session = NULL; uint32_t audit_id = 0; Manager *m = ASSERT_PTR(userdata); User *user = NULL; Seat *seat = NULL; pid_t leader; uid_t uid; int remote; uint32_t vtnr = 0; SessionType t; SessionClass c; int r; assert(message); assert_cc(sizeof(pid_t) == sizeof(uint32_t)); assert_cc(sizeof(uid_t) == sizeof(uint32_t)); r = sd_bus_message_read(message, "uusssssussbss", &uid, &leader, &service, &type, &class, &desktop, &cseat, &vtnr, &tty, &display, &remote, &remote_user, &remote_host); if (r < 0) return r; if (!uid_is_valid(uid)) return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid UID"); if (leader < 0 || leader == 1 || leader == getpid_cached()) return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid leader PID"); if (isempty(type)) t = _SESSION_TYPE_INVALID; else { t = session_type_from_string(type); if (t < 0) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid session type %s", type); } if (isempty(class)) c = _SESSION_CLASS_INVALID; else { c = session_class_from_string(class); if (c < 0) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid session class %s", class); } if (isempty(desktop)) desktop = NULL; else { if (!string_is_safe(desktop)) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid desktop string %s", desktop); } if (isempty(cseat)) seat = NULL; else { seat = hashmap_get(m->seats, cseat); if (!seat) return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT, "No seat '%s' known", cseat); } if (tty_is_vc(tty)) { int v; if (!seat) seat = m->seat0; else if (seat != m->seat0) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "TTY %s is virtual console but seat %s is not seat0", tty, seat->id); v = vtnr_from_tty(tty); if (v <= 0) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Cannot determine VT number from virtual console TTY %s", tty); if (vtnr == 0) vtnr = (uint32_t) v; else if (vtnr != (uint32_t) v) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Specified TTY and VT number do not match"); } else if (tty_is_console(tty)) { if (!seat) seat = m->seat0; else if (seat != m->seat0) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Console TTY specified but seat is not seat0"); if (vtnr != 0) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Console TTY specified but VT number is not 0"); } if (seat) { if (seat_has_vts(seat)) { if (vtnr <= 0 || vtnr > 63) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "VT number out of range"); } else { if (vtnr != 0) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Seat has no VTs but VT number not 0"); } } if (t == _SESSION_TYPE_INVALID) { if (!isempty(display)) t = SESSION_X11; else if (!isempty(tty)) t = SESSION_TTY; else t = SESSION_UNSPECIFIED; } if (c == _SESSION_CLASS_INVALID) { if (t == SESSION_UNSPECIFIED) c = SESSION_BACKGROUND; else c = SESSION_USER; } if (leader == 0) { _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL; r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_PID, &creds); if (r < 0) return r; r = sd_bus_creds_get_pid(creds, (pid_t*) &leader); if (r < 0) return r; } /* Check if we are already in a logind session. Or if we are in user@.service * which is a special PAM session that avoids creating a logind session. */ r = manager_get_user_by_pid(m, leader, NULL); if (r < 0) return r; if (r > 0) return sd_bus_error_setf(error, BUS_ERROR_SESSION_BUSY, "Already running in a session or user slice"); /* * Old gdm and lightdm start the user-session on the same VT as * the greeter session. But they destroy the greeter session * after the user-session and want the user-session to take * over the VT. We need to support this for * backwards-compatibility, so make sure we allow new sessions * on a VT that a greeter is running on. Furthermore, to allow * re-logins, we have to allow a greeter to take over a used VT for * the exact same reasons. */ if (c != SESSION_GREETER && vtnr > 0 && vtnr < MALLOC_ELEMENTSOF(m->seat0->positions) && m->seat0->positions[vtnr] && m->seat0->positions[vtnr]->class != SESSION_GREETER) return sd_bus_error_set(error, BUS_ERROR_SESSION_BUSY, "Already occupied by a session"); if (hashmap_size(m->sessions) >= m->sessions_max) return sd_bus_error_setf(error, SD_BUS_ERROR_LIMITS_EXCEEDED, "Maximum number of sessions (%" PRIu64 ") reached, refusing further sessions.", m->sessions_max); (void) audit_session_from_pid(leader, &audit_id); if (audit_session_is_valid(audit_id)) { /* Keep our session IDs and the audit session IDs in sync */ if (asprintf(&id, "%"PRIu32, audit_id) < 0) return -ENOMEM; /* Wut? There's already a session by this name and we didn't find it above? Weird, then let's * not trust the audit data and let's better register a new ID */ if (hashmap_contains(m->sessions, id)) { log_warning("Existing logind session ID %s used by new audit session, ignoring.", id); audit_id = AUDIT_SESSION_INVALID; id = mfree(id); } } if (!id) { do { id = mfree(id); if (asprintf(&id, "c%lu", ++m->session_counter) < 0) return -ENOMEM; } while (hashmap_contains(m->sessions, id)); } /* The generated names should not clash with 'auto' or 'self' */ assert(!SESSION_IS_SELF(id)); assert(!SESSION_IS_AUTO(id)); /* If we are not watching utmp already, try again */ manager_reconnect_utmp(m); r = manager_add_user_by_uid(m, uid, &user); if (r < 0) goto fail; r = manager_add_session(m, id, &session); if (r < 0) goto fail; session_set_user(session, user); r = session_set_leader(session, leader); if (r < 0) goto fail; session->original_type = session->type = t; session->class = c; session->remote = remote; session->vtnr = vtnr; if (!isempty(tty)) { session->tty = strdup(tty); if (!session->tty) { r = -ENOMEM; goto fail; } session->tty_validity = TTY_FROM_PAM; } 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; } } if (!isempty(desktop)) { session->desktop = strdup(desktop); if (!session->desktop) { r = -ENOMEM; goto fail; } } if (seat) { r = seat_attach_session(seat, session); if (r < 0) goto fail; } r = sd_bus_message_enter_container(message, 'a', "(sv)"); if (r < 0) goto fail; r = session_start(session, message, error); if (r < 0) goto fail; r = sd_bus_message_exit_container(message); if (r < 0) goto fail; session->create_message = sd_bus_message_ref(message); /* Now, let's wait until the slice unit and stuff got created. We send the reply back from * session_send_create_reply(). */ return 1; fail: if (session) session_add_to_gc_queue(session); if (user) user_add_to_gc_queue(user); return r; } static int method_release_session(sd_bus_message *message, void *userdata, sd_bus_error *error) { Manager *m = ASSERT_PTR(userdata); Session *session; const char *name; int r; assert(message); r = sd_bus_message_read(message, "s", &name); if (r < 0) return r; r = manager_get_session_from_creds(m, message, name, error, &session); if (r < 0) return r; r = session_release(session); if (r < 0) return r; return sd_bus_reply_method_return(message, NULL); } static int method_activate_session(sd_bus_message *message, void *userdata, sd_bus_error *error) { Manager *m = ASSERT_PTR(userdata); Session *session; const char *name; int r; assert(message); r = sd_bus_message_read(message, "s", &name); if (r < 0) return r; r = manager_get_session_from_creds(m, message, name, error, &session); if (r < 0) return r; /* PolicyKit is done by bus_session_method_activate() */ return bus_session_method_activate(message, session, error); } static int method_activate_session_on_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) { const char *session_name, *seat_name; Manager *m = ASSERT_PTR(userdata); Session *session; Seat *seat; int r; assert(message); /* Same as ActivateSession() but refuses to work if the seat doesn't match */ r = sd_bus_message_read(message, "ss", &session_name, &seat_name); if (r < 0) return r; r = manager_get_session_from_creds(m, message, session_name, error, &session); if (r < 0) return r; r = manager_get_seat_from_creds(m, message, seat_name, error, &seat); if (r < 0) return r; if (session->seat != seat) return sd_bus_error_setf(error, BUS_ERROR_SESSION_NOT_ON_SEAT, "Session %s not on seat %s", session_name, seat_name); r = check_polkit_chvt(message, m, error); if (r < 0) return r; if (r == 0) return 1; /* Will call us back */ r = session_activate(session); if (r < 0) return r; return sd_bus_reply_method_return(message, NULL); } static int method_lock_session(sd_bus_message *message, void *userdata, sd_bus_error *error) { Manager *m = ASSERT_PTR(userdata); Session *session; const char *name; int r; assert(message); r = sd_bus_message_read(message, "s", &name); if (r < 0) return r; r = manager_get_session_from_creds(m, message, name, error, &session); if (r < 0) return r; return bus_session_method_lock(message, session, error); } static int method_lock_sessions(sd_bus_message *message, void *userdata, sd_bus_error *error) { Manager *m = ASSERT_PTR(userdata); int r; assert(message); r = bus_verify_polkit_async( message, CAP_SYS_ADMIN, "org.freedesktop.login1.lock-sessions", NULL, false, UID_INVALID, &m->polkit_registry, error); if (r < 0) return r; if (r == 0) return 1; /* Will call us back */ r = session_send_lock_all(m, streq(sd_bus_message_get_member(message), "LockSessions")); if (r < 0) return r; return sd_bus_reply_method_return(message, NULL); } static int method_kill_session(sd_bus_message *message, void *userdata, sd_bus_error *error) { const char *name; Manager *m = ASSERT_PTR(userdata); Session *session; int r; assert(message); r = sd_bus_message_read(message, "s", &name); if (r < 0) return r; r = manager_get_session_from_creds(m, message, name, error, &session); if (r < 0) return r; return bus_session_method_kill(message, session, error); } static int method_kill_user(sd_bus_message *message, void *userdata, sd_bus_error *error) { Manager *m = ASSERT_PTR(userdata); uint32_t uid; User *user; int r; assert(message); r = sd_bus_message_read(message, "u", &uid); if (r < 0) return r; r = manager_get_user_from_creds(m, message, uid, error, &user); if (r < 0) return r; return bus_user_method_kill(message, user, error); } static int method_terminate_session(sd_bus_message *message, void *userdata, sd_bus_error *error) { Manager *m = ASSERT_PTR(userdata); const char *name; Session *session; int r; assert(message); r = sd_bus_message_read(message, "s", &name); if (r < 0) return r; r = manager_get_session_from_creds(m, message, name, error, &session); if (r < 0) return r; return bus_session_method_terminate(message, session, error); } static int method_terminate_user(sd_bus_message *message, void *userdata, sd_bus_error *error) { Manager *m = ASSERT_PTR(userdata); uint32_t uid; User *user; int r; assert(message); r = sd_bus_message_read(message, "u", &uid); if (r < 0) return r; r = manager_get_user_from_creds(m, message, uid, error, &user); if (r < 0) return r; return bus_user_method_terminate(message, user, error); } static int method_terminate_seat(sd_bus_message *message, void *userdata, sd_bus_error *error) { Manager *m = ASSERT_PTR(userdata); const char *name; Seat *seat; int r; assert(message); r = sd_bus_message_read(message, "s", &name); if (r < 0) return r; r = manager_get_seat_from_creds(m, message, name, error, &seat); if (r < 0) return r; return bus_seat_method_terminate(message, seat, error); } static int method_set_user_linger(sd_bus_message *message, void *userdata, sd_bus_error *error) { _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL; _cleanup_free_ char *cc = NULL; Manager *m = ASSERT_PTR(userdata); int r, b, interactive; struct passwd *pw; const char *path; uint32_t uid, auth_uid; assert(message); r = sd_bus_message_read(message, "ubb", &uid, &b, &interactive); if (r < 0) return r; r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID | SD_BUS_CREDS_OWNER_UID|SD_BUS_CREDS_AUGMENT, &creds); if (r < 0) return r; if (!uid_is_valid(uid)) { /* Note that we get the owner UID of the session or user unit, * not the actual client UID here! */ r = sd_bus_creds_get_owner_uid(creds, &uid); if (r < 0) return r; } /* owner_uid is racy, so for authorization we must use euid */ r = sd_bus_creds_get_euid(creds, &auth_uid); if (r < 0) return r; errno = 0; pw = getpwuid(uid); if (!pw) return errno_or_else(ENOENT); r = bus_verify_polkit_async( message, CAP_SYS_ADMIN, uid == auth_uid ? "org.freedesktop.login1.set-self-linger" : "org.freedesktop.login1.set-user-linger", NULL, interactive, UID_INVALID, &m->polkit_registry, error); if (r < 0) return r; if (r == 0) return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */ (void) mkdir_p_label("/var/lib/systemd", 0755); r = mkdir_safe_label("/var/lib/systemd/linger", 0755, 0, 0, MKDIR_WARN_MODE); if (r < 0) return r; cc = cescape(pw->pw_name); if (!cc) return -ENOMEM; path = strjoina("/var/lib/systemd/linger/", cc); if (b) { User *u; r = touch(path); if (r < 0) return r; if (manager_add_user_by_uid(m, uid, &u) >= 0) user_start(u); } else { User *u; r = unlink(path); if (r < 0 && errno != ENOENT) return -errno; u = hashmap_get(m->users, UID_TO_PTR(uid)); if (u) user_add_to_gc_queue(u); } return sd_bus_reply_method_return(message, NULL); } static int trigger_device(Manager *m, sd_device *d) { _cleanup_(sd_device_enumerator_unrefp) sd_device_enumerator *e = NULL; int r; assert(m); r = sd_device_enumerator_new(&e); if (r < 0) return r; r = sd_device_enumerator_allow_uninitialized(e); if (r < 0) return r; if (d) { r = sd_device_enumerator_add_match_parent(e, d); if (r < 0) return r; } FOREACH_DEVICE(e, d) { r = sd_device_trigger(d, SD_DEVICE_CHANGE); if (r < 0) log_device_debug_errno(d, r, "Failed to trigger device, ignoring: %m"); } return 0; } static int attach_device(Manager *m, const char *seat, const char *sysfs) { _cleanup_(sd_device_unrefp) sd_device *d = NULL; _cleanup_free_ char *rule = NULL, *file = NULL; const char *id_for_seat; int r; assert(m); assert(seat); assert(sysfs); r = sd_device_new_from_syspath(&d, sysfs); if (r < 0) return r; if (sd_device_has_current_tag(d, "seat") <= 0) return -ENODEV; if (sd_device_get_property_value(d, "ID_FOR_SEAT", &id_for_seat) < 0) return -ENODEV; if (asprintf(&file, "/etc/udev/rules.d/72-seat-%s.rules", id_for_seat) < 0) return -ENOMEM; if (asprintf(&rule, "TAG==\"seat\", ENV{ID_FOR_SEAT}==\"%s\", ENV{ID_SEAT}=\"%s\"", id_for_seat, seat) < 0) return -ENOMEM; (void) mkdir_p_label("/etc/udev/rules.d", 0755); r = write_string_file_atomic_label(file, rule); if (r < 0) return r; return trigger_device(m, d); } static int flush_devices(Manager *m) { _cleanup_closedir_ DIR *d = NULL; assert(m); d = opendir("/etc/udev/rules.d"); if (!d) { if (errno != ENOENT) log_warning_errno(errno, "Failed to open /etc/udev/rules.d: %m"); } else FOREACH_DIRENT_ALL(de, d, break) { 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_errno(errno, "Failed to unlink %s: %m", de->d_name); } return trigger_device(m, NULL); } static int method_attach_device(sd_bus_message *message, void *userdata, sd_bus_error *error) { const char *sysfs, *seat; Manager *m = ASSERT_PTR(userdata); int interactive, r; assert(message); r = sd_bus_message_read(message, "ssb", &seat, &sysfs, &interactive); if (r < 0) return r; if (!path_is_normalized(sysfs)) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Path %s is not normalized", sysfs); if (!path_startswith(sysfs, "/sys")) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Path %s is not in /sys", sysfs); if (SEAT_IS_SELF(seat) || SEAT_IS_AUTO(seat)) { Seat *found; r = manager_get_seat_from_creds(m, message, seat, error, &found); if (r < 0) return r; seat = found->id; } else if (!seat_name_is_valid(seat)) /* Note that a seat does not have to exist yet for this operation to succeed */ return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Seat name %s is not valid", seat); r = bus_verify_polkit_async( message, CAP_SYS_ADMIN, "org.freedesktop.login1.attach-device", NULL, interactive, UID_INVALID, &m->polkit_registry, error); if (r < 0) return r; if (r == 0) return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */ r = attach_device(m, seat, sysfs); if (r < 0) return r; return sd_bus_reply_method_return(message, NULL); } static int method_flush_devices(sd_bus_message *message, void *userdata, sd_bus_error *error) { Manager *m = ASSERT_PTR(userdata); int interactive, r; assert(message); r = sd_bus_message_read(message, "b", &interactive); if (r < 0) return r; r = bus_verify_polkit_async( message, CAP_SYS_ADMIN, "org.freedesktop.login1.flush-devices", NULL, interactive, UID_INVALID, &m->polkit_registry, error); if (r < 0) return r; if (r == 0) return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */ r = flush_devices(m); if (r < 0) return r; return sd_bus_reply_method_return(message, NULL); } static int have_multiple_sessions( Manager *m, uid_t uid) { Session *session; assert(m); /* Check for other users' sessions. Greeter sessions do not * count, and non-login sessions do not count either. */ HASHMAP_FOREACH(session, m->sessions) if (session->class == SESSION_USER && session->user->user_record->uid != uid) return true; return false; } static int bus_manager_log_shutdown( Manager *m, const HandleActionData *a) { assert(m); assert(a); const char *message = a->message ?: "System is shutting down"; const char *log_verb = a->log_verb ? strjoina("SHUTDOWN=", a->log_verb) : NULL; return log_struct(LOG_NOTICE, "MESSAGE_ID=%s", a->message_id ?: SD_MESSAGE_SHUTDOWN_STR, LOG_MESSAGE("%s%s%s%s.", message, m->wall_message ? " (" : "", strempty(m->wall_message), m->wall_message ? ")" : ""), log_verb); } static int lid_switch_ignore_handler(sd_event_source *e, uint64_t usec, void *userdata) { Manager *m = ASSERT_PTR(userdata); assert(e); m->lid_switch_ignore_event_source = sd_event_source_unref(m->lid_switch_ignore_event_source); return 0; } int manager_set_lid_switch_ignore(Manager *m, usec_t until) { int r; assert(m); if (until <= now(CLOCK_MONOTONIC)) return 0; /* We want to ignore the lid switch for a while after each * suspend, and after boot-up. Hence let's install a timer for * this. As long as the event source exists we ignore the lid * switch. */ if (m->lid_switch_ignore_event_source) { usec_t u; r = sd_event_source_get_time(m->lid_switch_ignore_event_source, &u); if (r < 0) return r; if (until <= u) return 0; r = sd_event_source_set_time(m->lid_switch_ignore_event_source, until); } else r = sd_event_add_time( m->event, &m->lid_switch_ignore_event_source, CLOCK_MONOTONIC, until, 0, lid_switch_ignore_handler, m); return r; } static int send_prepare_for(Manager *m, InhibitWhat w, bool _active) { int active = _active; assert(m); assert(IN_SET(w, INHIBIT_SHUTDOWN, INHIBIT_SLEEP)); return sd_bus_emit_signal(m->bus, "/org/freedesktop/login1", "org.freedesktop.login1.Manager", w == INHIBIT_SHUTDOWN ? "PrepareForShutdown" : "PrepareForSleep", "b", active); } static int execute_shutdown_or_sleep( Manager *m, const HandleActionData *a, sd_bus_error *error) { _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; const char *p; int r; assert(m); assert(a); if (a->inhibit_what == INHIBIT_SHUTDOWN) bus_manager_log_shutdown(m, a); r = bus_call_method( m->bus, bus_systemd_mgr, "StartUnit", error, &reply, "ss", a->target, "replace-irreversibly"); if (r < 0) goto error; r = sd_bus_message_read(reply, "o", &p); if (r < 0) goto error; r = free_and_strdup(&m->action_job, p); if (r < 0) goto error; m->delayed_action = a; /* Make sure the lid switch is ignored for a while */ manager_set_lid_switch_ignore(m, usec_add(now(CLOCK_MONOTONIC), m->holdoff_timeout_usec)); return 0; error: /* Tell people that they now may take a lock again */ (void) send_prepare_for(m, a->inhibit_what, false); return r; } int manager_dispatch_delayed(Manager *manager, bool timeout) { _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; Inhibitor *offending = NULL; int r; assert(manager); if (!manager->delayed_action || manager->action_job) return 0; if (manager_is_inhibited(manager, manager->delayed_action->inhibit_what, INHIBIT_DELAY, NULL, false, false, 0, &offending)) { _cleanup_free_ char *comm = NULL, *u = NULL; if (!timeout) return 0; (void) get_process_comm(offending->pid, &comm); u = uid_to_name(offending->uid); log_notice("Delay lock is active (UID "UID_FMT"/%s, PID "PID_FMT"/%s) but inhibitor timeout is reached.", offending->uid, strna(u), offending->pid, strna(comm)); } /* Actually do the operation */ r = execute_shutdown_or_sleep(manager, manager->delayed_action, &error); if (r < 0) { log_warning("Error during inhibitor-delayed operation (already returned success to client): %s", bus_error_message(&error, r)); manager->delayed_action = NULL; } return 1; /* We did some work. */ } static int manager_inhibit_timeout_handler( sd_event_source *s, uint64_t usec, void *userdata) { Manager *manager = ASSERT_PTR(userdata); assert(manager->inhibit_timeout_source == s); return manager_dispatch_delayed(manager, true); } static int delay_shutdown_or_sleep( Manager *m, const HandleActionData *a) { int r; assert(m); assert(a); if (m->inhibit_timeout_source) { r = sd_event_source_set_time_relative(m->inhibit_timeout_source, m->inhibit_delay_max); if (r < 0) return log_error_errno(r, "sd_event_source_set_time_relative() failed: %m"); r = sd_event_source_set_enabled(m->inhibit_timeout_source, SD_EVENT_ONESHOT); if (r < 0) return log_error_errno(r, "sd_event_source_set_enabled() failed: %m"); } else { r = sd_event_add_time_relative( m->event, &m->inhibit_timeout_source, CLOCK_MONOTONIC, m->inhibit_delay_max, 0, manager_inhibit_timeout_handler, m); if (r < 0) return r; } m->delayed_action = a; return 0; } int bus_manager_shutdown_or_sleep_now_or_later( Manager *m, const HandleActionData *a, sd_bus_error *error) { _cleanup_free_ char *load_state = NULL; bool delayed; int r; assert(m); assert(a); assert(!m->action_job); r = unit_load_state(m->bus, a->target, &load_state); if (r < 0) return r; if (!streq(load_state, "loaded")) return log_notice_errno(SYNTHETIC_ERRNO(EACCES), "Unit %s is %s, refusing operation.", a->target, load_state); /* Tell everybody to prepare for shutdown/sleep */ (void) send_prepare_for(m, a->inhibit_what, true); delayed = m->inhibit_delay_max > 0 && manager_is_inhibited(m, a->inhibit_what, INHIBIT_DELAY, NULL, false, false, 0, NULL); if (delayed) /* Shutdown is delayed, keep in mind what we * want to do, and start a timeout */ r = delay_shutdown_or_sleep(m, a); else /* Shutdown is not delayed, execute it * immediately */ r = execute_shutdown_or_sleep(m, a, error); return r; } static int verify_shutdown_creds( Manager *m, sd_bus_message *message, const HandleActionData *a, uint64_t flags, sd_bus_error *error) { _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL; bool multiple_sessions, blocked, interactive; uid_t uid; int r; assert(m); assert(a); assert(message); r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds); if (r < 0) return r; r = sd_bus_creds_get_euid(creds, &uid); if (r < 0) return r; r = have_multiple_sessions(m, uid); if (r < 0) return r; multiple_sessions = r > 0; blocked = manager_is_inhibited(m, a->inhibit_what, INHIBIT_BLOCK, NULL, false, true, uid, NULL); interactive = flags & SD_LOGIND_INTERACTIVE; if (multiple_sessions) { r = bus_verify_polkit_async( message, CAP_SYS_BOOT, a->polkit_action_multiple_sessions, NULL, interactive, UID_INVALID, &m->polkit_registry, error); if (r < 0) return r; if (r == 0) return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */ } if (blocked) { /* We don't check polkit for root here, because you can't be more privileged than root */ if (uid == 0 && (flags & SD_LOGIND_ROOT_CHECK_INHIBITORS)) return sd_bus_error_setf(error, SD_BUS_ERROR_ACCESS_DENIED, "Access denied to root due to active block inhibitor"); r = bus_verify_polkit_async(message, CAP_SYS_BOOT, a->polkit_action_ignore_inhibit, NULL, interactive, UID_INVALID, &m->polkit_registry, error); if (r < 0) return r; if (r == 0) return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */ } if (!multiple_sessions && !blocked) { r = bus_verify_polkit_async(message, CAP_SYS_BOOT, a->polkit_action, NULL, interactive, UID_INVALID, &m->polkit_registry, error); if (r < 0) return r; if (r == 0) return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */ } return 0; } static int setup_wall_message_timer(Manager *m, sd_bus_message* message) { _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL; int r; r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_AUGMENT|SD_BUS_CREDS_TTY|SD_BUS_CREDS_UID, &creds); if (r >= 0) { const char *tty = NULL; (void) sd_bus_creds_get_uid(creds, &m->scheduled_shutdown_uid); (void) sd_bus_creds_get_tty(creds, &tty); r = free_and_strdup(&m->scheduled_shutdown_tty, tty); if (r < 0) return log_oom(); } r = manager_setup_wall_message_timer(m); if (r < 0) return r; return 0; } static int method_do_shutdown_or_sleep( Manager *m, sd_bus_message *message, const HandleActionData *a, bool with_flags, sd_bus_error *error) { uint64_t flags; int r; assert(m); assert(message); assert(a); if (with_flags) { /* New style method: with flags parameter (and interactive bool in the bus message header) */ r = sd_bus_message_read(message, "t", &flags); if (r < 0) return r; if ((flags & ~SD_LOGIND_SHUTDOWN_AND_SLEEP_FLAGS_PUBLIC) != 0) return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid flags parameter"); if (a->handle != HANDLE_REBOOT && (flags & SD_LOGIND_REBOOT_VIA_KEXEC)) return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "Reboot via kexec is only applicable with reboot operations"); } else { /* Old style method: no flags parameter, but interactive bool passed as boolean in * payload. Let's convert this argument to the new-style flags parameter for our internal * use. */ int interactive; r = sd_bus_message_read(message, "b", &interactive); if (r < 0) return r; flags = interactive ? SD_LOGIND_INTERACTIVE : 0; } if ((flags & SD_LOGIND_REBOOT_VIA_KEXEC) && kexec_loaded()) a = handle_action_lookup(HANDLE_KEXEC); /* Don't allow multiple jobs being executed at the same time */ if (m->delayed_action) return sd_bus_error_setf(error, BUS_ERROR_OPERATION_IN_PROGRESS, "There's already a shutdown or sleep operation in progress"); if (a->sleep_operation >= 0) { r = can_sleep(a->sleep_operation); if (r == -ENOSPC) return sd_bus_error_set(error, BUS_ERROR_SLEEP_VERB_NOT_SUPPORTED, "Not enough swap space for hibernation"); if (r == 0) return sd_bus_error_setf(error, BUS_ERROR_SLEEP_VERB_NOT_SUPPORTED, "Sleep verb \"%s\" not supported", sleep_operation_to_string(a->sleep_operation)); if (r < 0) return r; } r = verify_shutdown_creds(m, message, a, flags, error); if (r != 0) return r; /* reset case we're shorting a scheduled shutdown */ m->unlink_nologin = false; reset_scheduled_shutdown(m); m->scheduled_shutdown_timeout = 0; m->scheduled_shutdown_action = a; (void) setup_wall_message_timer(m, message); r = bus_manager_shutdown_or_sleep_now_or_later(m, a, error); if (r < 0) return r; return sd_bus_reply_method_return(message, NULL); } static int method_poweroff(sd_bus_message *message, void *userdata, sd_bus_error *error) { Manager *m = userdata; return method_do_shutdown_or_sleep( m, message, handle_action_lookup(HANDLE_POWEROFF), sd_bus_message_is_method_call(message, NULL, "PowerOffWithFlags"), error); } static int method_reboot(sd_bus_message *message, void *userdata, sd_bus_error *error) { Manager *m = userdata; return method_do_shutdown_or_sleep( m, message, handle_action_lookup(HANDLE_REBOOT), sd_bus_message_is_method_call(message, NULL, "RebootWithFlags"), error); } static int method_halt(sd_bus_message *message, void *userdata, sd_bus_error *error) { Manager *m = userdata; return method_do_shutdown_or_sleep( m, message, handle_action_lookup(HANDLE_HALT), sd_bus_message_is_method_call(message, NULL, "HaltWithFlags"), error); } static int method_suspend(sd_bus_message *message, void *userdata, sd_bus_error *error) { Manager *m = userdata; return method_do_shutdown_or_sleep( m, message, handle_action_lookup(HANDLE_SUSPEND), sd_bus_message_is_method_call(message, NULL, "SuspendWithFlags"), error); } static int method_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) { Manager *m = userdata; return method_do_shutdown_or_sleep( m, message, handle_action_lookup(HANDLE_HIBERNATE), sd_bus_message_is_method_call(message, NULL, "HibernateWithFlags"), error); } static int method_hybrid_sleep(sd_bus_message *message, void *userdata, sd_bus_error *error) { Manager *m = userdata; return method_do_shutdown_or_sleep( m, message, handle_action_lookup(HANDLE_HYBRID_SLEEP), sd_bus_message_is_method_call(message, NULL, "HybridSleepWithFlags"), error); } static int method_suspend_then_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) { Manager *m = userdata; return method_do_shutdown_or_sleep( m, message, handle_action_lookup(HANDLE_SUSPEND_THEN_HIBERNATE), sd_bus_message_is_method_call(message, NULL, "SuspendThenHibernateWithFlags"), error); } static int nologin_timeout_handler( sd_event_source *s, uint64_t usec, void *userdata) { Manager *m = userdata; log_info("Creating /run/nologin, blocking further logins..."); m->unlink_nologin = create_shutdown_run_nologin_or_warn() >= 0; return 0; } static usec_t nologin_timeout_usec(usec_t elapse) { /* Issue /run/nologin five minutes before shutdown */ return LESS_BY(elapse, 5 * USEC_PER_MINUTE); } void manager_load_scheduled_shutdown(Manager *m) { _cleanup_fclose_ FILE *f = NULL; _cleanup_free_ char *usec = NULL, *warn_wall = NULL, *mode = NULL, *wall_message = NULL, *uid = NULL, *tty = NULL; int r; assert(m); r = parse_env_file(f, SHUTDOWN_SCHEDULE_FILE, "USEC", &usec, "WARN_WALL", &warn_wall, "MODE", &mode, "WALL_MESSAGE", &wall_message, "UID", &uid, "TTY", &tty); /* reset will delete the file */ reset_scheduled_shutdown(m); if (r == -ENOENT) return; if (r < 0) return (void) log_debug_errno(r, "Failed to parse " SHUTDOWN_SCHEDULE_FILE ": %m"); HandleAction handle = handle_action_from_string(mode); if (handle < 0) return (void) log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "Failed to parse scheduled shutdown type: %s", mode); if (!usec) return (void) log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "USEC is required"); if (deserialize_usec(usec, &m->scheduled_shutdown_timeout) < 0) return; /* assign parsed type only after we know usec is also valid */ m->scheduled_shutdown_action = handle_action_lookup(handle); if (warn_wall) { r = parse_boolean(warn_wall); if (r < 0) log_debug_errno(r, "Failed to parse enabling wall messages"); else m->enable_wall_messages = r; } if (wall_message) { _cleanup_free_ char *unescaped = NULL; r = cunescape(wall_message, 0, &unescaped); if (r < 0) log_debug_errno(r, "Failed to parse wall message: %s", wall_message); else free_and_replace(m->wall_message, unescaped); } if (uid) { r = parse_uid(uid, &m->scheduled_shutdown_uid); if (r < 0) log_debug_errno(r, "Failed to parse wall uid: %s", uid); } free_and_replace(m->scheduled_shutdown_tty, tty); r = manager_setup_shutdown_timers(m); if (r < 0) return reset_scheduled_shutdown(m); (void) manager_setup_wall_message_timer(m); (void) update_schedule_file(m); return; } static int update_schedule_file(Manager *m) { _cleanup_(unlink_and_freep) char *temp_path = NULL; _cleanup_fclose_ FILE *f = NULL; int r; assert(m); assert(m->scheduled_shutdown_action); r = mkdir_parents_label(SHUTDOWN_SCHEDULE_FILE, 0755); if (r < 0) return log_error_errno(r, "Failed to create shutdown subdirectory: %m"); r = fopen_temporary(SHUTDOWN_SCHEDULE_FILE, &f, &temp_path); if (r < 0) return log_error_errno(r, "Failed to save information about scheduled shutdowns: %m"); (void) fchmod(fileno(f), 0644); serialize_usec(f, "USEC", m->scheduled_shutdown_timeout); serialize_item_format(f, "WARN_WALL", "%s", one_zero(m->enable_wall_messages)); serialize_item_format(f, "MODE", "%s", handle_action_to_string(m->scheduled_shutdown_action->handle)); serialize_item_format(f, "UID", UID_FMT, m->scheduled_shutdown_uid); if (m->scheduled_shutdown_tty) serialize_item_format(f, "TTY", "%s", m->scheduled_shutdown_tty); if (!isempty(m->wall_message)) { r = serialize_item_escaped(f, "WALL_MESSAGE", m->wall_message); if (r < 0) goto fail; } r = fflush_and_check(f); if (r < 0) goto fail; if (rename(temp_path, SHUTDOWN_SCHEDULE_FILE) < 0) { r = -errno; goto fail; } temp_path = mfree(temp_path); return 0; fail: (void) unlink(SHUTDOWN_SCHEDULE_FILE); return log_error_errno(r, "Failed to write information about scheduled shutdowns: %m"); } static void reset_scheduled_shutdown(Manager *m) { assert(m); m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source); m->wall_message_timeout_source = sd_event_source_unref(m->wall_message_timeout_source); m->nologin_timeout_source = sd_event_source_unref(m->nologin_timeout_source); m->scheduled_shutdown_action = NULL; m->scheduled_shutdown_timeout = USEC_INFINITY; m->scheduled_shutdown_uid = UID_INVALID; m->scheduled_shutdown_tty = mfree(m->scheduled_shutdown_tty); m->wall_message = mfree(m->wall_message); m->shutdown_dry_run = false; if (m->unlink_nologin) { (void) unlink_or_warn("/run/nologin"); m->unlink_nologin = false; } (void) unlink(SHUTDOWN_SCHEDULE_FILE); } static int manager_scheduled_shutdown_handler( sd_event_source *s, uint64_t usec, void *userdata) { const HandleActionData *a = NULL; _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; Manager *m = ASSERT_PTR(userdata); int r; a = m->scheduled_shutdown_action; assert(a); /* Don't allow multiple jobs being executed at the same time */ if (m->delayed_action) { r = -EALREADY; log_error("Scheduled shutdown to %s failed: shutdown or sleep operation already in progress", a->target); goto error; } if (m->shutdown_dry_run) { /* We do not process delay inhibitors here. Otherwise, we * would have to be considered "in progress" (like the check * above) for some seconds after our admin has seen the final * wall message. */ bus_manager_log_shutdown(m, a); log_info("Running in dry run, suppressing action."); reset_scheduled_shutdown(m); return 0; } r = bus_manager_shutdown_or_sleep_now_or_later(m, m->scheduled_shutdown_action, &error); if (r < 0) { log_error_errno(r, "Scheduled shutdown to %s failed: %m", a->target); goto error; } return 0; error: reset_scheduled_shutdown(m); return r; } static int method_schedule_shutdown(sd_bus_message *message, void *userdata, sd_bus_error *error) { Manager *m = ASSERT_PTR(userdata); HandleAction handle; const HandleActionData *a; uint64_t elapse; char *type; int r; bool dry_run = false; assert(message); r = sd_bus_message_read(message, "st", &type, &elapse); if (r < 0) return r; if (startswith(type, "dry-")) { type += 4; dry_run = true; } handle = handle_action_from_string(type); if (!IN_SET(handle, HANDLE_POWEROFF, HANDLE_REBOOT, HANDLE_HALT, HANDLE_KEXEC)) return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "Unsupported shutdown type"); a = handle_action_lookup(handle); assert(a); assert(a->polkit_action); r = verify_shutdown_creds(m, message, a, 0, error); if (r != 0) return r; m->scheduled_shutdown_action = a; m->shutdown_dry_run = dry_run; m->scheduled_shutdown_timeout = elapse; r = manager_setup_shutdown_timers(m); if (r < 0) return r; r = setup_wall_message_timer(m, message); if (r >= 0) r = update_schedule_file(m); if (r < 0) { reset_scheduled_shutdown(m); return r; } return sd_bus_reply_method_return(message, NULL); } static int manager_setup_shutdown_timers(Manager* m) { int r; r = event_reset_time(m->event, &m->scheduled_shutdown_timeout_source, CLOCK_REALTIME, m->scheduled_shutdown_timeout, 0, manager_scheduled_shutdown_handler, m, 0, "scheduled-shutdown-timeout", true); if (r < 0) goto fail; r = event_reset_time(m->event, &m->nologin_timeout_source, CLOCK_REALTIME, nologin_timeout_usec(m->scheduled_shutdown_timeout), 0, nologin_timeout_handler, m, 0, "nologin-timeout", true); if (r < 0) goto fail; return 0; fail: m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source); m->nologin_timeout_source = sd_event_source_unref(m->nologin_timeout_source); return r; } static int method_cancel_scheduled_shutdown(sd_bus_message *message, void *userdata, sd_bus_error *error) { Manager *m = ASSERT_PTR(userdata); const HandleActionData *a; bool cancelled; int r; assert(message); cancelled = m->scheduled_shutdown_action && !IN_SET(m->scheduled_shutdown_action->handle, HANDLE_IGNORE, _HANDLE_ACTION_INVALID); if (!cancelled) return sd_bus_reply_method_return(message, "b", false); a = m->scheduled_shutdown_action; if (!a->polkit_action) return sd_bus_error_set(error, SD_BUS_ERROR_AUTH_FAILED, "Unsupported shutdown type"); r = bus_verify_polkit_async( message, CAP_SYS_BOOT, a->polkit_action, NULL, false, UID_INVALID, &m->polkit_registry, error); if (r < 0) return r; if (r == 0) return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */ if (m->enable_wall_messages) { _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL; const char *tty = NULL; uid_t uid = 0; r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_AUGMENT|SD_BUS_CREDS_TTY|SD_BUS_CREDS_UID, &creds); if (r >= 0) { (void) sd_bus_creds_get_uid(creds, &uid); (void) sd_bus_creds_get_tty(creds, &tty); } _cleanup_free_ char *username = uid_to_name(uid); log_struct(LOG_INFO, LOG_MESSAGE("System shutdown has been cancelled"), "ACTION=%s", handle_action_to_string(a->handle), "MESSAGE_ID=" SD_MESSAGE_SHUTDOWN_CANCELED_STR, username ? "OPERATOR=%s" : NULL, username); utmp_wall("System shutdown has been cancelled", username, tty, logind_wall_tty_filter, m); } reset_scheduled_shutdown(m); return sd_bus_reply_method_return(message, "b", true); } static int method_can_shutdown_or_sleep( Manager *m, sd_bus_message *message, const HandleActionData *a, sd_bus_error *error) { _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL; bool multiple_sessions, challenge, blocked; const char *result = NULL; uid_t uid; int r; assert(m); assert(message); assert(a); if (a->sleep_operation >= 0) { r = can_sleep(a->sleep_operation); if (IN_SET(r, 0, -ENOSPC)) return sd_bus_reply_method_return(message, "s", "na"); if (r < 0) return r; } r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds); if (r < 0) return r; r = sd_bus_creds_get_euid(creds, &uid); if (r < 0) return r; r = have_multiple_sessions(m, uid); if (r < 0) return r; multiple_sessions = r > 0; blocked = manager_is_inhibited(m, a->inhibit_what, INHIBIT_BLOCK, NULL, false, true, uid, NULL); HandleAction handle = handle_action_from_string(sleep_operation_to_string(a->sleep_operation)); if (handle >= 0) { const char *target; target = handle_action_lookup(handle)->target; if (target) { _cleanup_free_ char *load_state = NULL; r = unit_load_state(m->bus, target, &load_state); if (r < 0) return r; if (!streq(load_state, "loaded")) { result = "no"; goto finish; } } } if (multiple_sessions) { r = bus_test_polkit(message, CAP_SYS_BOOT, a->polkit_action_multiple_sessions, NULL, UID_INVALID, &challenge, error); if (r < 0) return r; if (r > 0) result = "yes"; else if (challenge) result = "challenge"; else result = "no"; } if (blocked) { r = bus_test_polkit(message, CAP_SYS_BOOT, a->polkit_action_ignore_inhibit, NULL, UID_INVALID, &challenge, error); if (r < 0) return r; if (r > 0) { if (!result) result = "yes"; } else if (challenge) { if (!result || streq(result, "yes")) result = "challenge"; } else result = "no"; } if (!multiple_sessions && !blocked) { /* If neither inhibit nor multiple sessions * apply then just check the normal policy */ r = bus_test_polkit(message, CAP_SYS_BOOT, a->polkit_action, NULL, UID_INVALID, &challenge, error); if (r < 0) return r; if (r > 0) result = "yes"; else if (challenge) result = "challenge"; else result = "no"; } finish: return sd_bus_reply_method_return(message, "s", result); } static int method_can_poweroff(sd_bus_message *message, void *userdata, sd_bus_error *error) { Manager *m = userdata; return method_can_shutdown_or_sleep( m, message, handle_action_lookup(HANDLE_POWEROFF), error); } static int method_can_reboot(sd_bus_message *message, void *userdata, sd_bus_error *error) { Manager *m = userdata; return method_can_shutdown_or_sleep( m, message, handle_action_lookup(HANDLE_REBOOT), error); } static int method_can_halt(sd_bus_message *message, void *userdata, sd_bus_error *error) { Manager *m = userdata; return method_can_shutdown_or_sleep( m, message, handle_action_lookup(HANDLE_HALT), error); } static int method_can_suspend(sd_bus_message *message, void *userdata, sd_bus_error *error) { Manager *m = userdata; return method_can_shutdown_or_sleep( m, message, handle_action_lookup(HANDLE_SUSPEND), error); } static int method_can_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) { Manager *m = userdata; return method_can_shutdown_or_sleep( m, message, handle_action_lookup(HANDLE_HIBERNATE), error); } static int method_can_hybrid_sleep(sd_bus_message *message, void *userdata, sd_bus_error *error) { Manager *m = userdata; return method_can_shutdown_or_sleep( m, message, handle_action_lookup(HANDLE_HYBRID_SLEEP), error); } static int method_can_suspend_then_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) { Manager *m = userdata; return method_can_shutdown_or_sleep( m, message, handle_action_lookup(HANDLE_SUSPEND_THEN_HIBERNATE), error); } static int property_get_reboot_parameter( sd_bus *bus, const char *path, const char *interface, const char *property, sd_bus_message *reply, void *userdata, sd_bus_error *error) { _cleanup_free_ char *parameter = NULL; int r; assert(bus); assert(reply); assert(userdata); r = read_reboot_parameter(¶meter); if (r < 0) return r; return sd_bus_message_append(reply, "s", parameter); } static int method_set_reboot_parameter( sd_bus_message *message, void *userdata, sd_bus_error *error) { Manager *m = ASSERT_PTR(userdata); const char *arg; int r; assert(message); r = sd_bus_message_read(message, "s", &arg); if (r < 0) return r; r = detect_container(); if (r < 0) return r; if (r > 0) return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Reboot parameter not supported in containers, refusing."); r = bus_verify_polkit_async(message, CAP_SYS_ADMIN, "org.freedesktop.login1.set-reboot-parameter", NULL, false, UID_INVALID, &m->polkit_registry, error); if (r < 0) return r; if (r == 0) return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */ r = update_reboot_parameter_and_warn(arg, false); if (r < 0) return r; return sd_bus_reply_method_return(message, NULL); } static int method_can_reboot_parameter( sd_bus_message *message, void *userdata, sd_bus_error *error) { _unused_ Manager *m = ASSERT_PTR(userdata); int r; assert(message); r = detect_container(); if (r < 0) return r; if (r > 0) /* Inside containers, specifying a reboot parameter, doesn't make much sense */ return sd_bus_reply_method_return(message, "s", "na"); return return_test_polkit( message, CAP_SYS_ADMIN, "org.freedesktop.login1.set-reboot-parameter", NULL, UID_INVALID, error); } static int property_get_reboot_to_firmware_setup( sd_bus *bus, const char *path, const char *interface, const char *property, sd_bus_message *reply, void *userdata, sd_bus_error *error) { int r; assert(bus); assert(reply); assert(userdata); r = getenv_bool("SYSTEMD_REBOOT_TO_FIRMWARE_SETUP"); if (r == -ENXIO) { /* EFI case: let's see what is currently configured in the EFI variables */ r = efi_get_reboot_to_firmware(); if (r < 0 && r != -EOPNOTSUPP) log_warning_errno(r, "Failed to determine reboot-to-firmware-setup state: %m"); } else if (r < 0) log_warning_errno(r, "Failed to parse $SYSTEMD_REBOOT_TO_FIRMWARE_SETUP: %m"); else if (r > 0) { /* Non-EFI case: let's see whether /run/systemd/reboot-to-firmware-setup exists. */ if (access("/run/systemd/reboot-to-firmware-setup", F_OK) < 0) { if (errno != ENOENT) log_warning_errno(errno, "Failed to check whether /run/systemd/reboot-to-firmware-setup exists: %m"); r = false; } else r = true; } return sd_bus_message_append(reply, "b", r > 0); } static int method_set_reboot_to_firmware_setup( sd_bus_message *message, void *userdata, sd_bus_error *error) { Manager *m = ASSERT_PTR(userdata); bool use_efi; int b, r; assert(message); r = sd_bus_message_read(message, "b", &b); if (r < 0) return r; r = getenv_bool("SYSTEMD_REBOOT_TO_FIRMWARE_SETUP"); if (r == -ENXIO) { /* EFI case: let's see what the firmware supports */ r = efi_reboot_to_firmware_supported(); if (r == -EOPNOTSUPP) return sd_bus_error_set(error, SD_BUS_ERROR_NOT_SUPPORTED, "Firmware does not support boot into firmware."); if (r < 0) return r; use_efi = true; } else if (r <= 0) { /* non-EFI case: $SYSTEMD_REBOOT_TO_FIRMWARE_SETUP is set to off */ if (r < 0) log_warning_errno(r, "Failed to parse $SYSTEMD_REBOOT_TO_FIRMWARE_SETUP: %m"); return sd_bus_error_set(error, SD_BUS_ERROR_NOT_SUPPORTED, "Firmware does not support boot into firmware."); } else /* non-EFI case: $SYSTEMD_REBOOT_TO_FIRMWARE_SETUP is set to on */ use_efi = false; r = bus_verify_polkit_async(message, CAP_SYS_ADMIN, "org.freedesktop.login1.set-reboot-to-firmware-setup", NULL, false, UID_INVALID, &m->polkit_registry, error); if (r < 0) return r; if (r == 0) return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */ if (use_efi) { r = efi_set_reboot_to_firmware(b); if (r < 0) return r; } else { if (b) { r = touch("/run/systemd/reboot-to-firmware-setup"); if (r < 0) return r; } else { if (unlink("/run/systemd/reboot-to-firmware-setup") < 0 && errno != ENOENT) return -errno; } } return sd_bus_reply_method_return(message, NULL); } static int method_can_reboot_to_firmware_setup( sd_bus_message *message, void *userdata, sd_bus_error *error) { _unused_ Manager *m = ASSERT_PTR(userdata); int r; assert(message); r = getenv_bool("SYSTEMD_REBOOT_TO_FIRMWARE_SETUP"); if (r == -ENXIO) { /* EFI case: let's see what the firmware supports */ r = efi_reboot_to_firmware_supported(); if (r < 0) { if (r != -EOPNOTSUPP) log_warning_errno(r, "Failed to determine whether reboot to firmware is supported: %m"); return sd_bus_reply_method_return(message, "s", "na"); } } else if (r <= 0) { /* Non-EFI case: let's trust $SYSTEMD_REBOOT_TO_FIRMWARE_SETUP */ if (r < 0) log_warning_errno(r, "Failed to parse $SYSTEMD_REBOOT_TO_FIRMWARE_SETUP: %m"); return sd_bus_reply_method_return(message, "s", "na"); } return return_test_polkit( message, CAP_SYS_ADMIN, "org.freedesktop.login1.set-reboot-to-firmware-setup", NULL, UID_INVALID, error); } static int property_get_reboot_to_boot_loader_menu( sd_bus *bus, const char *path, const char *interface, const char *property, sd_bus_message *reply, void *userdata, sd_bus_error *error) { uint64_t x = UINT64_MAX; int r; assert(bus); assert(reply); assert(userdata); r = getenv_bool("SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU"); if (r == -ENXIO) { /* EFI case: returns the current value of LoaderConfigTimeoutOneShot. Three cases are distinguished: * * 1. Variable not set, boot into boot loader menu is not enabled (we return UINT64_MAX to the user) * 2. Variable set to "0", boot into boot loader menu is enabled with no timeout (we return 0 to the user) * 3. Variable set to numeric value formatted in ASCII, boot into boot loader menu with the specified timeout in seconds */ r = efi_loader_get_config_timeout_one_shot(&x); if (r < 0) { if (r != -ENOENT) log_warning_errno(r, "Failed to read LoaderConfigTimeoutOneShot variable, ignoring: %m"); } } else if (r < 0) log_warning_errno(r, "Failed to parse $SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU: %m"); else if (r > 0) { _cleanup_free_ char *v = NULL; /* Non-EFI case, let's process /run/systemd/reboot-to-boot-loader-menu. */ r = read_one_line_file("/run/systemd/reboot-to-boot-loader-menu", &v); if (r < 0) { if (r != -ENOENT) log_warning_errno(r, "Failed to read /run/systemd/reboot-to-boot-loader-menu: %m"); } else { r = safe_atou64(v, &x); if (r < 0) log_warning_errno(r, "Failed to parse /run/systemd/reboot-to-boot-loader-menu: %m"); } } return sd_bus_message_append(reply, "t", x); } static int method_set_reboot_to_boot_loader_menu( sd_bus_message *message, void *userdata, sd_bus_error *error) { Manager *m = ASSERT_PTR(userdata); bool use_efi; uint64_t x; int r; assert(message); r = sd_bus_message_read(message, "t", &x); if (r < 0) return r; r = getenv_bool("SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU"); if (r == -ENXIO) { uint64_t features; /* EFI case: let's see if booting into boot loader menu is supported. */ r = efi_loader_get_features(&features); if (r < 0) log_warning_errno(r, "Failed to determine whether reboot to boot loader menu is supported: %m"); if (r < 0 || !FLAGS_SET(features, EFI_LOADER_FEATURE_CONFIG_TIMEOUT_ONE_SHOT)) return sd_bus_error_set(error, SD_BUS_ERROR_NOT_SUPPORTED, "Boot loader does not support boot into boot loader menu."); use_efi = true; } else if (r <= 0) { /* non-EFI case: $SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU is set to off */ if (r < 0) log_warning_errno(r, "Failed to parse $SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU: %m"); return sd_bus_error_set(error, SD_BUS_ERROR_NOT_SUPPORTED, "Boot loader does not support boot into boot loader menu."); } else /* non-EFI case: $SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU is set to on */ use_efi = false; r = bus_verify_polkit_async(message, CAP_SYS_ADMIN, "org.freedesktop.login1.set-reboot-to-boot-loader-menu", NULL, false, UID_INVALID, &m->polkit_registry, error); if (r < 0) return r; if (r == 0) return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */ if (use_efi) { if (x == UINT64_MAX) r = efi_set_variable(EFI_LOADER_VARIABLE(LoaderConfigTimeoutOneShot), NULL, 0); else { char buf[DECIMAL_STR_MAX(uint64_t) + 1]; xsprintf(buf, "%" PRIu64, DIV_ROUND_UP(x, USEC_PER_SEC)); /* second granularity */ r = efi_set_variable_string(EFI_LOADER_VARIABLE(LoaderConfigTimeoutOneShot), buf); } if (r < 0) return r; } else { if (x == UINT64_MAX) { if (unlink("/run/systemd/reboot-to-boot-loader-menu") < 0 && errno != ENOENT) return -errno; } else { char buf[DECIMAL_STR_MAX(uint64_t) + 1]; xsprintf(buf, "%" PRIu64, x); /* µs granularity */ r = write_string_file_atomic_label("/run/systemd/reboot-to-boot-loader-menu", buf); if (r < 0) return r; } } return sd_bus_reply_method_return(message, NULL); } static int method_can_reboot_to_boot_loader_menu( sd_bus_message *message, void *userdata, sd_bus_error *error) { _unused_ Manager *m = ASSERT_PTR(userdata); int r; assert(message); r = getenv_bool("SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU"); if (r == -ENXIO) { uint64_t features = 0; /* EFI case, let's see if booting into boot loader menu is supported. */ r = efi_loader_get_features(&features); if (r < 0) log_warning_errno(r, "Failed to determine whether reboot to boot loader menu is supported: %m"); if (r < 0 || !FLAGS_SET(features, EFI_LOADER_FEATURE_CONFIG_TIMEOUT_ONE_SHOT)) return sd_bus_reply_method_return(message, "s", "na"); } else if (r <= 0) { /* Non-EFI case: let's trust $SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU */ if (r < 0) log_warning_errno(r, "Failed to parse $SYSTEMD_REBOOT_TO_BOOT_LOADER_MENU: %m"); return sd_bus_reply_method_return(message, "s", "na"); } return return_test_polkit( message, CAP_SYS_ADMIN, "org.freedesktop.login1.set-reboot-to-boot-loader-menu", NULL, UID_INVALID, error); } static int property_get_reboot_to_boot_loader_entry( sd_bus *bus, const char *path, const char *interface, const char *property, sd_bus_message *reply, void *userdata, sd_bus_error *error) { _cleanup_free_ char *v = NULL; Manager *m = ASSERT_PTR(userdata); const char *x = NULL; int r; assert(bus); assert(reply); r = getenv_bool("SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY"); if (r == -ENXIO) { /* EFI case: let's read the LoaderEntryOneShot variable */ r = efi_loader_update_entry_one_shot_cache(&m->efi_loader_entry_one_shot, &m->efi_loader_entry_one_shot_stat); if (r < 0) { if (r != -ENOENT) log_warning_errno(r, "Failed to read LoaderEntryOneShot variable, ignoring: %m"); } else x = m->efi_loader_entry_one_shot; } else if (r < 0) log_warning_errno(r, "Failed to parse $SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY: %m"); else if (r > 0) { /* Non-EFI case, let's process /run/systemd/reboot-to-boot-loader-entry. */ r = read_one_line_file("/run/systemd/reboot-to-boot-loader-entry", &v); if (r < 0) { if (r != -ENOENT) log_warning_errno(r, "Failed to read /run/systemd/reboot-to-boot-loader-entry, ignoring: %m"); } else if (!efi_loader_entry_name_valid(v)) log_warning("/run/systemd/reboot-to-boot-loader-entry is not valid, ignoring."); else x = v; } return sd_bus_message_append(reply, "s", x); } static int boot_loader_entry_exists(Manager *m, const char *id) { _cleanup_(boot_config_free) BootConfig config = BOOT_CONFIG_NULL; int r; assert(m); assert(id); r = boot_config_load_auto(&config, NULL, NULL); if (r < 0 && r != -ENOKEY) /* don't complain if no GPT is found, hence skip ENOKEY */ return r; r = manager_read_efi_boot_loader_entries(m); if (r >= 0) (void) boot_config_augment_from_loader(&config, m->efi_boot_loader_entries, /* auto_only= */ true); return !!boot_config_find_entry(&config, id); } static int method_set_reboot_to_boot_loader_entry( sd_bus_message *message, void *userdata, sd_bus_error *error) { Manager *m = ASSERT_PTR(userdata); bool use_efi; const char *v; int r; assert(message); r = sd_bus_message_read(message, "s", &v); if (r < 0) return r; if (isempty(v)) v = NULL; else if (efi_loader_entry_name_valid(v)) { r = boot_loader_entry_exists(m, v); if (r < 0) return r; if (r == 0) return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Boot loader entry '%s' is not known.", v); } else return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Boot loader entry name '%s' is not valid, refusing.", v); r = getenv_bool("SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY"); if (r == -ENXIO) { uint64_t features; /* EFI case: let's see if booting into boot loader entry is supported. */ r = efi_loader_get_features(&features); if (r < 0) log_warning_errno(r, "Failed to determine whether reboot into boot loader entry is supported: %m"); if (r < 0 || !FLAGS_SET(features, EFI_LOADER_FEATURE_ENTRY_ONESHOT)) return sd_bus_error_set(error, SD_BUS_ERROR_NOT_SUPPORTED, "Loader does not support boot into boot loader entry."); use_efi = true; } else if (r <= 0) { /* non-EFI case: $SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY is set to off */ if (r < 0) log_warning_errno(r, "Failed to parse $SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY: %m"); return sd_bus_error_set(error, SD_BUS_ERROR_NOT_SUPPORTED, "Loader does not support boot into boot loader entry."); } else /* non-EFI case: $SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY is set to on */ use_efi = false; r = bus_verify_polkit_async(message, CAP_SYS_ADMIN, "org.freedesktop.login1.set-reboot-to-boot-loader-entry", NULL, false, UID_INVALID, &m->polkit_registry, error); if (r < 0) return r; if (r == 0) return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */ if (use_efi) { if (isempty(v)) /* Delete item */ r = efi_set_variable(EFI_LOADER_VARIABLE(LoaderEntryOneShot), NULL, 0); else r = efi_set_variable_string(EFI_LOADER_VARIABLE(LoaderEntryOneShot), v); if (r < 0) return r; } else { if (isempty(v)) { if (unlink("/run/systemd/reboot-to-boot-loader-entry") < 0 && errno != ENOENT) return -errno; } else { r = write_string_file_atomic_label("/run/systemd/reboot-boot-to-loader-entry", v); if (r < 0) return r; } } return sd_bus_reply_method_return(message, NULL); } static int method_can_reboot_to_boot_loader_entry( sd_bus_message *message, void *userdata, sd_bus_error *error) { _unused_ Manager *m = ASSERT_PTR(userdata); int r; assert(message); r = getenv_bool("SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY"); if (r == -ENXIO) { uint64_t features = 0; /* EFI case, let's see if booting into boot loader entry is supported. */ r = efi_loader_get_features(&features); if (r < 0) log_warning_errno(r, "Failed to determine whether reboot to boot loader entry is supported: %m"); if (r < 0 || !FLAGS_SET(features, EFI_LOADER_FEATURE_ENTRY_ONESHOT)) return sd_bus_reply_method_return(message, "s", "na"); } else if (r <= 0) { /* Non-EFI case: let's trust $SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY */ if (r < 0) log_warning_errno(r, "Failed to parse $SYSTEMD_REBOOT_TO_BOOT_LOADER_ENTRY: %m"); return sd_bus_reply_method_return(message, "s", "na"); } return return_test_polkit( message, CAP_SYS_ADMIN, "org.freedesktop.login1.set-reboot-to-boot-loader-entry", NULL, UID_INVALID, error); } static int property_get_boot_loader_entries( sd_bus *bus, const char *path, const char *interface, const char *property, sd_bus_message *reply, void *userdata, sd_bus_error *error) { _cleanup_(boot_config_free) BootConfig config = BOOT_CONFIG_NULL; Manager *m = ASSERT_PTR(userdata); size_t i; int r; assert(bus); assert(reply); r = boot_config_load_auto(&config, NULL, NULL); if (r < 0 && r != -ENOKEY) /* don't complain if there's no GPT found */ return r; r = manager_read_efi_boot_loader_entries(m); if (r >= 0) (void) boot_config_augment_from_loader(&config, m->efi_boot_loader_entries, /* auto_only= */ true); r = sd_bus_message_open_container(reply, 'a', "s"); if (r < 0) return r; for (i = 0; i < config.n_entries; i++) { BootEntry *e = config.entries + i; r = sd_bus_message_append(reply, "s", e->id); if (r < 0) return r; } return sd_bus_message_close_container(reply); } static int method_set_wall_message( sd_bus_message *message, void *userdata, sd_bus_error *error) { int r; Manager *m = ASSERT_PTR(userdata); char *wall_message; int enable_wall_messages; assert(message); r = sd_bus_message_read(message, "sb", &wall_message, &enable_wall_messages); if (r < 0) return r; if (strlen(wall_message) > WALL_MESSAGE_MAX) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Wall message too long, maximum permitted length is %u characters.", WALL_MESSAGE_MAX); /* Short-circuit the operation if the desired state is already in place, to * avoid an unnecessary polkit permission check. */ if (streq_ptr(m->wall_message, empty_to_null(wall_message)) && m->enable_wall_messages == enable_wall_messages) goto done; r = bus_verify_polkit_async(message, CAP_SYS_ADMIN, "org.freedesktop.login1.set-wall-message", NULL, false, UID_INVALID, &m->polkit_registry, error); if (r < 0) return r; if (r == 0) return 1; /* Will call us back */ r = free_and_strdup(&m->wall_message, empty_to_null(wall_message)); if (r < 0) return log_oom(); m->enable_wall_messages = enable_wall_messages; done: return sd_bus_reply_method_return(message, NULL); } static int method_inhibit(sd_bus_message *message, void *userdata, sd_bus_error *error) { _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL; const char *who, *why, *what, *mode; _cleanup_free_ char *id = NULL; _cleanup_close_ int fifo_fd = -EBADF; Manager *m = ASSERT_PTR(userdata); InhibitMode mm; InhibitWhat w; pid_t pid; uid_t uid; int r; assert(message); r = sd_bus_message_read(message, "ssss", &what, &who, &why, &mode); if (r < 0) return r; w = inhibit_what_from_string(what); if (w <= 0) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid what specification %s", what); mm = inhibit_mode_from_string(mode); if (mm < 0) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid mode specification %s", mode); /* Delay is only supported for shutdown/sleep */ if (mm == INHIBIT_DELAY && (w & ~(INHIBIT_SHUTDOWN|INHIBIT_SLEEP))) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Delay inhibitors only supported for shutdown and sleep"); /* Don't allow taking delay locks while we are already * executing the operation. We shouldn't create the impression * that the lock was successful if the machine is about to go * down/suspend any moment. */ if (m->delayed_action && m->delayed_action->inhibit_what & w) return sd_bus_error_setf(error, BUS_ERROR_OPERATION_IN_PROGRESS, "The operation inhibition has been requested for is already running"); r = bus_verify_polkit_async( message, CAP_SYS_BOOT, w == INHIBIT_SHUTDOWN ? (mm == INHIBIT_BLOCK ? "org.freedesktop.login1.inhibit-block-shutdown" : "org.freedesktop.login1.inhibit-delay-shutdown") : w == INHIBIT_SLEEP ? (mm == INHIBIT_BLOCK ? "org.freedesktop.login1.inhibit-block-sleep" : "org.freedesktop.login1.inhibit-delay-sleep") : w == INHIBIT_IDLE ? "org.freedesktop.login1.inhibit-block-idle" : w == INHIBIT_HANDLE_POWER_KEY ? "org.freedesktop.login1.inhibit-handle-power-key" : w == INHIBIT_HANDLE_SUSPEND_KEY ? "org.freedesktop.login1.inhibit-handle-suspend-key" : w == INHIBIT_HANDLE_REBOOT_KEY ? "org.freedesktop.login1.inhibit-handle-reboot-key" : w == INHIBIT_HANDLE_HIBERNATE_KEY ? "org.freedesktop.login1.inhibit-handle-hibernate-key" : "org.freedesktop.login1.inhibit-handle-lid-switch", NULL, false, UID_INVALID, &m->polkit_registry, error); if (r < 0) return r; if (r == 0) return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */ r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID|SD_BUS_CREDS_PID, &creds); if (r < 0) return r; r = sd_bus_creds_get_euid(creds, &uid); if (r < 0) return r; r = sd_bus_creds_get_pid(creds, &pid); if (r < 0) return r; if (hashmap_size(m->inhibitors) >= m->inhibitors_max) return sd_bus_error_setf(error, SD_BUS_ERROR_LIMITS_EXCEEDED, "Maximum number of inhibitors (%" PRIu64 ") reached, refusing further inhibitors.", m->inhibitors_max); do { id = mfree(id); if (asprintf(&id, "%lu", ++m->inhibit_counter) < 0) return -ENOMEM; } while (hashmap_get(m->inhibitors, id)); _cleanup_(inhibitor_freep) Inhibitor *i = NULL; r = manager_add_inhibitor(m, id, &i); if (r < 0) return r; i->what = w; i->mode = mm; i->pid = pid; i->uid = uid; i->why = strdup(why); i->who = strdup(who); if (!i->why || !i->who) return -ENOMEM; fifo_fd = inhibitor_create_fifo(i); if (fifo_fd < 0) return fifo_fd; r = inhibitor_start(i); if (r < 0) return r; TAKE_PTR(i); return sd_bus_reply_method_return(message, "h", fifo_fd); } static const sd_bus_vtable manager_vtable[] = { SD_BUS_VTABLE_START(0), SD_BUS_WRITABLE_PROPERTY("EnableWallMessages", "b", bus_property_get_bool, bus_property_set_bool, offsetof(Manager, enable_wall_messages), 0), SD_BUS_WRITABLE_PROPERTY("WallMessage", "s", NULL, NULL, offsetof(Manager, wall_message), 0), SD_BUS_PROPERTY("NAutoVTs", "u", NULL, offsetof(Manager, n_autovts), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("KillOnlyUsers", "as", NULL, offsetof(Manager, kill_only_users), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("KillExcludeUsers", "as", NULL, offsetof(Manager, kill_exclude_users), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("KillUserProcesses", "b", bus_property_get_bool, offsetof(Manager, kill_user_processes), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("RebootParameter", "s", property_get_reboot_parameter, 0, 0), SD_BUS_PROPERTY("RebootToFirmwareSetup", "b", property_get_reboot_to_firmware_setup, 0, 0), SD_BUS_PROPERTY("RebootToBootLoaderMenu", "t", property_get_reboot_to_boot_loader_menu, 0, 0), SD_BUS_PROPERTY("RebootToBootLoaderEntry", "s", property_get_reboot_to_boot_loader_entry, 0, 0), SD_BUS_PROPERTY("BootLoaderEntries", "as", property_get_boot_loader_entries, 0, SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("IdleHint", "b", property_get_idle_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), SD_BUS_PROPERTY("IdleSinceHint", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), SD_BUS_PROPERTY("IdleSinceHintMonotonic", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), SD_BUS_PROPERTY("BlockInhibited", "s", property_get_inhibited, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), SD_BUS_PROPERTY("DelayInhibited", "s", property_get_inhibited, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), SD_BUS_PROPERTY("InhibitDelayMaxUSec", "t", NULL, offsetof(Manager, inhibit_delay_max), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("UserStopDelayUSec", "t", NULL, offsetof(Manager, user_stop_delay), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("HandlePowerKey", "s", property_get_handle_action, offsetof(Manager, handle_power_key), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("HandlePowerKeyLongPress", "s", property_get_handle_action, offsetof(Manager, handle_power_key_long_press), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("HandleRebootKey", "s", property_get_handle_action, offsetof(Manager, handle_reboot_key), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("HandleRebootKeyLongPress", "s", property_get_handle_action, offsetof(Manager, handle_reboot_key_long_press), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("HandleSuspendKey", "s", property_get_handle_action, offsetof(Manager, handle_suspend_key), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("HandleSuspendKeyLongPress", "s", property_get_handle_action, offsetof(Manager, handle_suspend_key_long_press), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("HandleHibernateKey", "s", property_get_handle_action, offsetof(Manager, handle_hibernate_key), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("HandleHibernateKeyLongPress", "s", property_get_handle_action, offsetof(Manager, handle_hibernate_key_long_press), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("HandleLidSwitch", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("HandleLidSwitchExternalPower", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch_ep), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("HandleLidSwitchDocked", "s", property_get_handle_action, offsetof(Manager, handle_lid_switch_docked), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("HoldoffTimeoutUSec", "t", NULL, offsetof(Manager, holdoff_timeout_usec), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("IdleAction", "s", property_get_handle_action, offsetof(Manager, idle_action), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("IdleActionUSec", "t", NULL, offsetof(Manager, idle_action_usec), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("PreparingForShutdown", "b", property_get_preparing, 0, 0), SD_BUS_PROPERTY("PreparingForSleep", "b", property_get_preparing, 0, 0), SD_BUS_PROPERTY("ScheduledShutdown", "(st)", property_get_scheduled_shutdown, 0, 0), SD_BUS_PROPERTY("Docked", "b", property_get_docked, 0, 0), SD_BUS_PROPERTY("LidClosed", "b", property_get_lid_closed, 0, 0), SD_BUS_PROPERTY("OnExternalPower", "b", property_get_on_external_power, 0, 0), SD_BUS_PROPERTY("RemoveIPC", "b", bus_property_get_bool, offsetof(Manager, remove_ipc), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("RuntimeDirectorySize", "t", NULL, offsetof(Manager, runtime_dir_size), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("RuntimeDirectoryInodesMax", "t", NULL, offsetof(Manager, runtime_dir_inodes), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("InhibitorsMax", "t", NULL, offsetof(Manager, inhibitors_max), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("NCurrentInhibitors", "t", property_get_hashmap_size, offsetof(Manager, inhibitors), 0), SD_BUS_PROPERTY("SessionsMax", "t", NULL, offsetof(Manager, sessions_max), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_PROPERTY("NCurrentSessions", "t", property_get_hashmap_size, offsetof(Manager, sessions), 0), SD_BUS_PROPERTY("UserTasksMax", "t", property_get_compat_user_tasks_max, 0, SD_BUS_VTABLE_PROPERTY_CONST|SD_BUS_VTABLE_HIDDEN), SD_BUS_PROPERTY("StopIdleSessionUSec", "t", NULL, offsetof(Manager, stop_idle_session_usec), SD_BUS_VTABLE_PROPERTY_CONST), SD_BUS_METHOD_WITH_ARGS("GetSession", SD_BUS_ARGS("s", session_id), SD_BUS_RESULT("o", object_path), method_get_session, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("GetSessionByPID", SD_BUS_ARGS("u", pid), SD_BUS_RESULT("o", object_path), method_get_session_by_pid, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("GetUser", SD_BUS_ARGS("u", uid), SD_BUS_RESULT("o", object_path), method_get_user, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("GetUserByPID", SD_BUS_ARGS("u", pid), SD_BUS_RESULT("o", object_path), method_get_user_by_pid, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("GetSeat", SD_BUS_ARGS("s", seat_id), SD_BUS_RESULT("o", object_path), method_get_seat, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("ListSessions", SD_BUS_NO_ARGS, SD_BUS_RESULT("a(susso)", sessions), method_list_sessions, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("ListUsers", SD_BUS_NO_ARGS, SD_BUS_RESULT("a(uso)", users), method_list_users, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("ListSeats", SD_BUS_NO_ARGS, SD_BUS_RESULT("a(so)", seats), method_list_seats, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("ListInhibitors", SD_BUS_NO_ARGS, SD_BUS_RESULT("a(ssssuu)", inhibitors), method_list_inhibitors, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("CreateSession", SD_BUS_ARGS("u", uid, "u", pid, "s", service, "s", type, "s", class, "s", desktop, "s", seat_id, "u", vtnr, "s", tty, "s", display, "b", remote, "s", remote_user, "s", remote_host, "a(sv)", properties), SD_BUS_RESULT("s", session_id, "o", object_path, "s", runtime_path, "h", fifo_fd, "u", uid, "s", seat_id, "u", vtnr, "b", existing), method_create_session, 0), SD_BUS_METHOD_WITH_ARGS("ReleaseSession", SD_BUS_ARGS("s", session_id), SD_BUS_NO_RESULT, method_release_session, 0), SD_BUS_METHOD_WITH_ARGS("ActivateSession", SD_BUS_ARGS("s", session_id), SD_BUS_NO_RESULT, method_activate_session, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("ActivateSessionOnSeat", SD_BUS_ARGS("s", session_id, "s", seat_id), SD_BUS_NO_RESULT, method_activate_session_on_seat, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("LockSession", SD_BUS_ARGS("s", session_id), SD_BUS_NO_RESULT, method_lock_session, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("UnlockSession", SD_BUS_ARGS("s", session_id), SD_BUS_NO_RESULT, method_lock_session, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD("LockSessions", NULL, NULL, method_lock_sessions, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD("UnlockSessions", NULL, NULL, method_lock_sessions, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("KillSession", SD_BUS_ARGS("s", session_id, "s", who, "i", signal_number), SD_BUS_NO_RESULT, method_kill_session, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("KillUser", SD_BUS_ARGS("u", uid, "i", signal_number), SD_BUS_NO_RESULT, method_kill_user, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("TerminateSession", SD_BUS_ARGS("s", session_id), SD_BUS_NO_RESULT, method_terminate_session, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("TerminateUser", SD_BUS_ARGS("u", uid), SD_BUS_NO_RESULT, method_terminate_user, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("TerminateSeat", SD_BUS_ARGS("s", seat_id), SD_BUS_NO_RESULT, method_terminate_seat, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("SetUserLinger", SD_BUS_ARGS("u", uid, "b", enable, "b", interactive), SD_BUS_NO_RESULT, method_set_user_linger, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("AttachDevice", SD_BUS_ARGS("s", seat_id, "s", sysfs_path, "b", interactive), SD_BUS_NO_RESULT, method_attach_device, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("FlushDevices", SD_BUS_ARGS("b", interactive), SD_BUS_NO_RESULT, method_flush_devices, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("PowerOff", SD_BUS_ARGS("b", interactive), SD_BUS_NO_RESULT, method_poweroff, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("PowerOffWithFlags", SD_BUS_ARGS("t", flags), SD_BUS_NO_RESULT, method_poweroff, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("Reboot", SD_BUS_ARGS("b", interactive), SD_BUS_NO_RESULT, method_reboot, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("RebootWithFlags", SD_BUS_ARGS("t", flags), SD_BUS_NO_RESULT, method_reboot, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("Halt", SD_BUS_ARGS("b", interactive), SD_BUS_NO_RESULT, method_halt, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("HaltWithFlags", SD_BUS_ARGS("t", flags), SD_BUS_NO_RESULT, method_halt, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("Suspend", SD_BUS_ARGS("b", interactive), SD_BUS_NO_RESULT, method_suspend, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("SuspendWithFlags", SD_BUS_ARGS("t", flags), SD_BUS_NO_RESULT, method_suspend, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("Hibernate", SD_BUS_ARGS("b", interactive), SD_BUS_NO_RESULT, method_hibernate, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("HibernateWithFlags", SD_BUS_ARGS("t", flags), SD_BUS_NO_RESULT, method_hibernate, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("HybridSleep", SD_BUS_ARGS("b", interactive), SD_BUS_NO_RESULT, method_hybrid_sleep, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("HybridSleepWithFlags", SD_BUS_ARGS("t", flags), SD_BUS_NO_RESULT, method_hybrid_sleep, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("SuspendThenHibernate", SD_BUS_ARGS("b", interactive), SD_BUS_NO_RESULT, method_suspend_then_hibernate, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("SuspendThenHibernateWithFlags", SD_BUS_ARGS("t", flags), SD_BUS_NO_RESULT, method_suspend_then_hibernate, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("CanPowerOff", SD_BUS_NO_ARGS, SD_BUS_RESULT("s", result), method_can_poweroff, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("CanReboot", SD_BUS_NO_ARGS, SD_BUS_RESULT("s", result), method_can_reboot, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("CanHalt", SD_BUS_NO_ARGS, SD_BUS_RESULT("s", result), method_can_halt, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("CanSuspend", SD_BUS_NO_ARGS, SD_BUS_RESULT("s", result), method_can_suspend, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("CanHibernate", SD_BUS_NO_ARGS, SD_BUS_RESULT("s", result), method_can_hibernate, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("CanHybridSleep", SD_BUS_NO_ARGS, SD_BUS_RESULT("s", result), method_can_hybrid_sleep, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("CanSuspendThenHibernate", SD_BUS_NO_ARGS, SD_BUS_RESULT("s", result), method_can_suspend_then_hibernate, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("ScheduleShutdown", SD_BUS_ARGS("s", type, "t", usec), SD_BUS_NO_RESULT, method_schedule_shutdown, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("CancelScheduledShutdown", SD_BUS_NO_ARGS, SD_BUS_RESULT("b", cancelled), method_cancel_scheduled_shutdown, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("Inhibit", SD_BUS_ARGS("s", what, "s", who, "s", why, "s", mode), SD_BUS_RESULT("h", pipe_fd), method_inhibit, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("CanRebootParameter", SD_BUS_NO_ARGS, SD_BUS_RESULT("s", result), method_can_reboot_parameter, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("SetRebootParameter", SD_BUS_ARGS("s", parameter), SD_BUS_NO_RESULT, method_set_reboot_parameter, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("CanRebootToFirmwareSetup", SD_BUS_NO_ARGS, SD_BUS_RESULT("s", result), method_can_reboot_to_firmware_setup, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("SetRebootToFirmwareSetup", SD_BUS_ARGS("b", enable), SD_BUS_NO_RESULT, method_set_reboot_to_firmware_setup, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("CanRebootToBootLoaderMenu", SD_BUS_NO_ARGS, SD_BUS_RESULT("s", result), method_can_reboot_to_boot_loader_menu, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("SetRebootToBootLoaderMenu", SD_BUS_ARGS("t", timeout), SD_BUS_NO_RESULT, method_set_reboot_to_boot_loader_menu, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("CanRebootToBootLoaderEntry", SD_BUS_NO_ARGS, SD_BUS_RESULT("s", result), method_can_reboot_to_boot_loader_entry, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("SetRebootToBootLoaderEntry", SD_BUS_ARGS("s", boot_loader_entry), SD_BUS_NO_RESULT, method_set_reboot_to_boot_loader_entry, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("SetWallMessage", SD_BUS_ARGS("s", wall_message, "b", enable), SD_BUS_NO_RESULT, method_set_wall_message, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_SIGNAL_WITH_ARGS("SessionNew", SD_BUS_ARGS("s", session_id, "o", object_path), 0), SD_BUS_SIGNAL_WITH_ARGS("SessionRemoved", SD_BUS_ARGS("s", session_id, "o", object_path), 0), SD_BUS_SIGNAL_WITH_ARGS("UserNew", SD_BUS_ARGS("u", uid, "o", object_path), 0), SD_BUS_SIGNAL_WITH_ARGS("UserRemoved", SD_BUS_ARGS("u", uid, "o", object_path), 0), SD_BUS_SIGNAL_WITH_ARGS("SeatNew", SD_BUS_ARGS("s", seat_id, "o", object_path), 0), SD_BUS_SIGNAL_WITH_ARGS("SeatRemoved", SD_BUS_ARGS("s", seat_id, "o", object_path), 0), SD_BUS_SIGNAL_WITH_ARGS("PrepareForShutdown", SD_BUS_ARGS("b", start), 0), SD_BUS_SIGNAL_WITH_ARGS("PrepareForSleep", SD_BUS_ARGS("b", start), 0), SD_BUS_VTABLE_END }; const BusObjectImplementation manager_object = { "/org/freedesktop/login1", "org.freedesktop.login1.Manager", .vtables = BUS_VTABLES(manager_vtable), .children = BUS_IMPLEMENTATIONS(&seat_object, &session_object, &user_object), }; static int session_jobs_reply(Session *s, uint32_t jid, const char *unit, const char *result) { assert(s); assert(unit); if (!s->started) return 0; if (result && !streq(result, "done")) { _cleanup_(sd_bus_error_free) sd_bus_error e = SD_BUS_ERROR_NULL; sd_bus_error_setf(&e, BUS_ERROR_JOB_FAILED, "Job %u for unit '%s' failed with '%s'", jid, unit, result); return session_send_create_reply(s, &e); } return session_send_create_reply(s, NULL); } int match_job_removed(sd_bus_message *message, void *userdata, sd_bus_error *error) { const char *path, *result, *unit; Manager *m = ASSERT_PTR(userdata); Session *session; uint32_t id; User *user; int r; assert(message); r = sd_bus_message_read(message, "uoss", &id, &path, &unit, &result); if (r < 0) { bus_log_parse_error(r); return 0; } if (m->action_job && streq(m->action_job, path)) { assert(m->delayed_action); log_info("Operation '%s' finished.", inhibit_what_to_string(m->delayed_action->inhibit_what)); /* Tell people that they now may take a lock again */ (void) send_prepare_for(m, m->delayed_action->inhibit_what, false); m->action_job = mfree(m->action_job); m->delayed_action = NULL; return 0; } session = hashmap_get(m->session_units, unit); if (session) { if (streq_ptr(path, session->scope_job)) { session->scope_job = mfree(session->scope_job); (void) session_jobs_reply(session, id, unit, result); session_save(session); user_save(session->user); } session_add_to_gc_queue(session); } user = hashmap_get(m->user_units, unit); if (user) { if (streq_ptr(path, user->service_job)) { user->service_job = mfree(user->service_job); LIST_FOREACH(sessions_by_user, s, user->sessions) (void) session_jobs_reply(s, id, unit, NULL /* don't propagate user service failures to the client */); user_save(user); } user_add_to_gc_queue(user); } return 0; } int match_unit_removed(sd_bus_message *message, void *userdata, sd_bus_error *error) { const char *path, *unit; Manager *m = ASSERT_PTR(userdata); Session *session; User *user; int r; assert(message); r = sd_bus_message_read(message, "so", &unit, &path); if (r < 0) { bus_log_parse_error(r); return 0; } session = hashmap_get(m->session_units, unit); if (session) session_add_to_gc_queue(session); user = hashmap_get(m->user_units, unit); if (user) user_add_to_gc_queue(user); return 0; } int match_properties_changed(sd_bus_message *message, void *userdata, sd_bus_error *error) { _cleanup_free_ char *unit = NULL; Manager *m = ASSERT_PTR(userdata); const char *path; Session *session; User *user; int r; assert(message); path = sd_bus_message_get_path(message); if (!path) return 0; r = unit_name_from_dbus_path(path, &unit); if (r == -EINVAL) /* not a unit */ return 0; if (r < 0) { log_oom(); return 0; } session = hashmap_get(m->session_units, unit); if (session) session_add_to_gc_queue(session); user = hashmap_get(m->user_units, unit); if (user) user_add_to_gc_queue(user); return 0; } int match_reloading(sd_bus_message *message, void *userdata, sd_bus_error *error) { Manager *m = ASSERT_PTR(userdata); Session *session; int b, r; assert(message); r = sd_bus_message_read(message, "b", &b); if (r < 0) { bus_log_parse_error(r); return 0; } if (b) return 0; /* systemd finished reloading, let's recheck all our sessions */ log_debug("System manager has been reloaded, rechecking sessions..."); HASHMAP_FOREACH(session, m->sessions) session_add_to_gc_queue(session); return 0; } int manager_send_changed(Manager *manager, const char *property, ...) { char **l; assert(manager); l = strv_from_stdarg_alloca(property); return sd_bus_emit_properties_changed_strv( manager->bus, "/org/freedesktop/login1", "org.freedesktop.login1.Manager", l); } static int strdup_job(sd_bus_message *reply, char **job) { const char *j; char *copy; int r; r = sd_bus_message_read(reply, "o", &j); if (r < 0) return r; copy = strdup(j); if (!copy) return -ENOMEM; *job = copy; return 1; } int manager_start_scope( Manager *manager, const char *scope, pid_t pid, const char *slice, const char *description, char **wants, char **after, const char *requires_mounts_for, sd_bus_message *more_properties, sd_bus_error *error, char **job) { _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL; int r; assert(manager); assert(scope); assert(pid > 1); assert(job); r = bus_message_new_method_call(manager->bus, &m, bus_systemd_mgr, "StartTransientUnit"); if (r < 0) return r; r = sd_bus_message_append(m, "ss", strempty(scope), "fail"); if (r < 0) return r; r = sd_bus_message_open_container(m, 'a', "(sv)"); if (r < 0) return r; if (!isempty(slice)) { r = sd_bus_message_append(m, "(sv)", "Slice", "s", slice); if (r < 0) return r; } if (!isempty(description)) { r = sd_bus_message_append(m, "(sv)", "Description", "s", description); if (r < 0) return r; } STRV_FOREACH(i, wants) { r = sd_bus_message_append(m, "(sv)", "Wants", "as", 1, *i); if (r < 0) return r; } STRV_FOREACH(i, after) { r = sd_bus_message_append(m, "(sv)", "After", "as", 1, *i); if (r < 0) return r; } if (!empty_or_root(requires_mounts_for)) { r = sd_bus_message_append(m, "(sv)", "RequiresMountsFor", "as", 1, requires_mounts_for); if (r < 0) return r; } /* Make sure that the session shells are terminated with SIGHUP since bash and friends tend to ignore * SIGTERM */ r = sd_bus_message_append(m, "(sv)", "SendSIGHUP", "b", true); if (r < 0) return r; r = sd_bus_message_append(m, "(sv)", "PIDs", "au", 1, pid); if (r < 0) return r; /* For login session scopes, if a process is OOM killed by the kernel, *don't* terminate the rest of the scope */ r = sd_bus_message_append(m, "(sv)", "OOMPolicy", "s", "continue"); if (r < 0) return r; /* disable TasksMax= for the session scope, rely on the slice setting for it */ r = sd_bus_message_append(m, "(sv)", "TasksMax", "t", UINT64_MAX); if (r < 0) return bus_log_create_error(r); if (more_properties) { /* If TasksMax also appears here, it will overwrite the default value set above */ r = sd_bus_message_copy(m, more_properties, true); if (r < 0) return r; } r = sd_bus_message_close_container(m); if (r < 0) return r; r = sd_bus_message_append(m, "a(sa(sv))", 0); if (r < 0) return r; r = sd_bus_call(manager->bus, m, 0, error, &reply); if (r < 0) return r; return strdup_job(reply, job); } int manager_start_unit(Manager *manager, const char *unit, sd_bus_error *error, char **job) { _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; int r; assert(manager); assert(unit); assert(job); r = bus_call_method( manager->bus, bus_systemd_mgr, "StartUnit", error, &reply, "ss", unit, "replace"); if (r < 0) return r; return strdup_job(reply, job); } int manager_stop_unit(Manager *manager, const char *unit, const char *job_mode, sd_bus_error *error, char **ret_job) { _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; int r; assert(manager); assert(unit); assert(ret_job); r = bus_call_method( manager->bus, bus_systemd_mgr, "StopUnit", error, &reply, "ss", unit, job_mode ?: "fail"); if (r < 0) { if (sd_bus_error_has_names(error, BUS_ERROR_NO_SUCH_UNIT, BUS_ERROR_LOAD_FAILED)) { *ret_job = NULL; sd_bus_error_free(error); return 0; } return r; } return strdup_job(reply, ret_job); } int manager_abandon_scope(Manager *manager, const char *scope, sd_bus_error *ret_error) { _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; _cleanup_free_ char *path = NULL; int r; assert(manager); assert(scope); path = unit_dbus_path_from_name(scope); if (!path) return -ENOMEM; r = sd_bus_call_method( manager->bus, "org.freedesktop.systemd1", path, "org.freedesktop.systemd1.Scope", "Abandon", &error, NULL, NULL); if (r < 0) { if (sd_bus_error_has_names(&error, BUS_ERROR_NO_SUCH_UNIT, BUS_ERROR_LOAD_FAILED, BUS_ERROR_SCOPE_NOT_RUNNING)) return 0; sd_bus_error_move(ret_error, &error); return r; } return 1; } int manager_kill_unit(Manager *manager, const char *unit, KillWho who, int signo, sd_bus_error *error) { assert(manager); assert(unit); return bus_call_method( manager->bus, bus_systemd_mgr, "KillUnit", error, NULL, "ssi", unit, who == KILL_LEADER ? "main" : "all", signo); } int manager_unit_is_active(Manager *manager, const char *unit, sd_bus_error *ret_error) { _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; _cleanup_free_ char *path = NULL; const char *state; int r; assert(manager); assert(unit); path = unit_dbus_path_from_name(unit); if (!path) return -ENOMEM; r = sd_bus_get_property( manager->bus, "org.freedesktop.systemd1", path, "org.freedesktop.systemd1.Unit", "ActiveState", &error, &reply, "s"); if (r < 0) { /* systemd might have dropped off momentarily, let's * not make this an error */ if (sd_bus_error_has_names(&error, SD_BUS_ERROR_NO_REPLY, SD_BUS_ERROR_DISCONNECTED)) return true; /* If the unit is already unloaded then it's not * active */ if (sd_bus_error_has_names(&error, BUS_ERROR_NO_SUCH_UNIT, BUS_ERROR_LOAD_FAILED)) return false; sd_bus_error_move(ret_error, &error); return r; } r = sd_bus_message_read(reply, "s", &state); if (r < 0) return r; return !STR_IN_SET(state, "inactive", "failed"); } int manager_job_is_active(Manager *manager, const char *path, sd_bus_error *ret_error) { _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; int r; assert(manager); assert(path); r = sd_bus_get_property( manager->bus, "org.freedesktop.systemd1", path, "org.freedesktop.systemd1.Job", "State", &error, &reply, "s"); if (r < 0) { if (sd_bus_error_has_names(&error, SD_BUS_ERROR_NO_REPLY, SD_BUS_ERROR_DISCONNECTED)) return true; if (sd_bus_error_has_name(&error, SD_BUS_ERROR_UNKNOWN_OBJECT)) return false; sd_bus_error_move(ret_error, &error); return r; } /* We don't actually care about the state really. The fact * that we could read the job state is enough for us */ return true; }