diff options
Diffstat (limited to 'src/login/logind-dbus.c')
| -rw-r--r-- | src/login/logind-dbus.c | 4406 |
1 files changed, 4406 insertions, 0 deletions
diff --git a/src/login/logind-dbus.c b/src/login/logind-dbus.c new file mode 100644 index 0000000..ec1f2f3 --- /dev/null +++ b/src/login/logind-dbus.c @@ -0,0 +1,4406 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ + +#include <errno.h> +#include <sys/stat.h> +#include <unistd.h> + +#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" +#include "wall.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) { + Manager *m = ASSERT_PTR(userdata); + _cleanup_free_ char *p = NULL; + Session *session = 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_session_from_creds(m, message, NULL, error, &session); + if (r < 0) + return r; + } else { + r = manager_get_session_by_pidref(m, &PIDREF_MAKE_FROM_PID(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.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 create_session( + sd_bus_message *message, + void *userdata, + sd_bus_error *error, + uid_t uid, + pid_t pid, + int pidfd, + const char *service, + const char *type, + const char *class, + const char *desktop, + const char *cseat, + uint32_t vtnr, + const char *tty, + const char *display, + int remote, + const char *remote_user, + const char *remote_host, + uint64_t flags) { + + _cleanup_(pidref_done) PidRef leader = PIDREF_NULL; + Manager *m = ASSERT_PTR(userdata); + _cleanup_free_ char *id = NULL; + Session *session = NULL; + uint32_t audit_id = 0; + User *user = NULL; + Seat *seat = NULL; + SessionType t; + SessionClass c; + int r; + + assert(message); + + if (!uid_is_valid(uid)) + return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid UID"); + + if (flags != 0) + return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "Flags must be zero."); + + if (pidfd >= 0) { + r = pidref_set_pidfd(&leader, pidfd); + if (r < 0) + return r; + } else if (pid == 0) { + _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL; + pid_t p; + + r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_PID, &creds); + if (r < 0) + return r; + + r = sd_bus_creds_get_pid(creds, &p); + if (r < 0) + return r; + + r = pidref_set_pid(&leader, p); + if (r < 0) + return r; + } else { + assert(pid > 0); + + r = pidref_set_pid(&leader, pid); + if (r < 0) + return r; + } + + if (leader.pid == 1 || leader.pid == 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; + } + + /* 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.pid, 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.pid, &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%" PRIu64, ++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_consume(session, TAKE_PIDREF(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_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; + pid_t leader; + uid_t uid; + int remote; + uint32_t vtnr = 0; + 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; + + return create_session( + message, + userdata, + error, + uid, + leader, + /* pidfd = */ -EBADF, + service, + type, + class, + desktop, + cseat, + vtnr, + tty, + display, + remote, + remote_user, + remote_host, + /* flags = */ 0); +} + +static int method_create_session_pidfd(sd_bus_message *message, void *userdata, sd_bus_error *error) { + const char *service, *type, *class, *cseat, *tty, *display, *remote_user, *remote_host, *desktop; + int leaderfd = -EBADF; + uid_t uid; + int remote; + uint32_t vtnr = 0; + uint64_t flags; + int r; + + r = sd_bus_message_read(message, + "uhsssssussbsst", + &uid, + &leaderfd, + &service, + &type, + &class, + &desktop, + &cseat, + &vtnr, + &tty, + &display, + &remote, + &remote_user, + &remote_host, + &flags); + if (r < 0) + return r; + + return create_session( + message, + userdata, + error, + uid, + /* pid = */ 0, + leaderfd, + service, + type, + class, + desktop, + cseat, + vtnr, + tty, + display, + remote, + remote_user, + remote_host, + flags); +} + +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 *parent) { + _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 (parent) { + r = sd_device_enumerator_add_match_parent(e, parent); + 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, sd_bus_error *error) { + _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 sd_bus_error_set_errnof(error, r, "Failed to open device '%s': %m", sysfs); + + if (sd_device_has_current_tag(d, "seat") <= 0) + return sd_bus_error_set_errnof(error, ENODEV, "Device '%s' lacks 'seat' udev tag.", sysfs); + + if (sd_device_get_property_value(d, "ID_FOR_SEAT", &id_for_seat) < 0) + return sd_bus_error_set_errnof(error, ENODEV, "Device '%s' lacks 'ID_FOR_SEAT' udev property.", sysfs); + + 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, error); + 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, const HandleActionData *a, bool _active) { + int k = 0, r, active = _active; + + assert(m); + assert(a); + assert(IN_SET(a->inhibit_what, INHIBIT_SHUTDOWN, INHIBIT_SLEEP)); + + /* We need to send both old and new signal for backward compatibility. The newer one allows clients + * to know which type of reboot is going to happen, as they might be doing different actions (e.g.: + * on soft-reboot), and it is sent first, so that clients know that if they receive the old one + * first then they don't have to wait for the new one, as it means it's not supported. So, do not + * change the order here, as it is an API. */ + if (a->inhibit_what == INHIBIT_SHUTDOWN) { + k = sd_bus_emit_signal(m->bus, + "/org/freedesktop/login1", + "org.freedesktop.login1.Manager", + "PrepareForShutdownWithMetadata", + "ba{sv}", + active, + 1, + "type", + "s", + handle_action_to_string(a->handle)); + if (k < 0) + log_debug_errno(k, "Failed to emit PrepareForShutdownWithMetadata(): %m"); + } + + r = sd_bus_emit_signal(m->bus, + "/org/freedesktop/login1", + "org.freedesktop.login1.Manager", + a->inhibit_what == INHIBIT_SHUTDOWN ? "PrepareForShutdown" : "PrepareForSleep", + "b", + active); + if (r < 0) + log_debug_errno(r, "Failed to emit PrepareForShutdown(): %m"); + + return RET_GATHER(k, r); +} + +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, 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) pidref_get_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.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, 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 (FLAGS_SET(flags, (SD_LOGIND_REBOOT_VIA_KEXEC|SD_LOGIND_SOFT_REBOOT))) + return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, + "Both reboot via kexec and soft reboot selected, which is not supported"); + + if (a->handle != HANDLE_REBOOT) { + if (flags & SD_LOGIND_REBOOT_VIA_KEXEC) + return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, + "Reboot via kexec option is only applicable with reboot operations"); + if ((flags & SD_LOGIND_SOFT_REBOOT) || (flags & SD_LOGIND_SOFT_REBOOT_IF_NEXTROOT_SET_UP)) + return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, + "Soft reboot option 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_SOFT_REBOOT) || + ((flags & SD_LOGIND_SOFT_REBOOT_IF_NEXTROOT_SET_UP) && path_is_os_tree("/run/nextroot") > 0)) + a = handle_action_lookup(HANDLE_SOFT_REBOOT); + else 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) { + SleepSupport support; + + r = sleep_supported_full(a->sleep_operation, &support); + if (r < 0) + return r; + if (r == 0) + switch (support) { + + case SLEEP_DISABLED: + return sd_bus_error_setf(error, BUS_ERROR_SLEEP_VERB_NOT_SUPPORTED, + "Sleep verb '%s' is disabled by config", + sleep_operation_to_string(a->sleep_operation)); + + case SLEEP_NOT_CONFIGURED: + case SLEEP_STATE_OR_MODE_NOT_SUPPORTED: + case SLEEP_ALARM_NOT_SUPPORTED: + return sd_bus_error_setf(error, BUS_ERROR_SLEEP_VERB_NOT_SUPPORTED, + "Sleep verb '%s' is not configured or configuration is not supported by kernel", + sleep_operation_to_string(a->sleep_operation)); + + case SLEEP_RESUME_NOT_SUPPORTED: + return sd_bus_error_set(error, BUS_ERROR_SLEEP_VERB_NOT_SUPPORTED, + "Not running on EFI and resume= is not set. No available method to resume from hibernation"); + + case SLEEP_NOT_ENOUGH_SWAP_SPACE: + return sd_bus_error_set(error, BUS_ERROR_SLEEP_VERB_NOT_SUPPORTED, + "Not enough suitable swap space for hibernation available on compatible block devices and file systems"); + + default: + assert_not_reached(); + + } + } + + 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->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 (!HANDLE_ACTION_IS_SHUTDOWN(handle)) + return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Unsupported shutdown type: %s", 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); + + (void) 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) { + SleepSupport support; + + r = sleep_supported_full(a->sleep_operation, &support); + if (r < 0) + return r; + if (r == 0) + return sd_bus_reply_method_return(message, "s", support == SLEEP_DISABLED ? "no" : "na"); + } + + 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; + _cleanup_(pidref_done) PidRef pidref = PIDREF_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; + + r = pidref_set_pid(&pidref, pid); + if (r < 0) + return sd_bus_error_set_errnof(error, r, "Failed pin source process "PID_FMT": %m", pid); + + 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, "%" PRIu64, ++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 = TAKE_PIDREF(pidref); + 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, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), + 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("CreateSessionWithPIDFD", + SD_BUS_ARGS("u", uid, + "h", pidfd, + "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, + "t", flags, + "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_pidfd, + 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("PrepareForShutdownWithMetadata", + SD_BUS_ARGS("b", start, "a{sv}", metadata), + 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.", handle_action_to_string(m->delayed_action->handle)); + + /* Tell people that they now may take a lock again */ + (void) send_prepare_for(m, m->delayed_action, 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, + const PidRef *pidref, + 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(pidref_is_set(pidref)); + 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 = bus_append_scope_pidref(m, pidref); + 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; +} |