| /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
| |
| #include <errno.h> |
| |
| #include "alloc-util.h" |
| #include "bus-get-properties.h" |
| #include "bus-polkit.h" |
| #include "bus-util.h" |
| #include "format-util.h" |
| #include "logind-dbus.h" |
| #include "logind-session-dbus.h" |
| #include "logind-user-dbus.h" |
| #include "logind-user.h" |
| #include "logind.h" |
| #include "missing_capability.h" |
| #include "signal-util.h" |
| #include "strv.h" |
| #include "user-util.h" |
| |
| static int property_get_uid( |
| sd_bus *bus, |
| const char *path, |
| const char *interface, |
| const char *property, |
| sd_bus_message *reply, |
| void *userdata, |
| sd_bus_error *error) { |
| |
| User *u = ASSERT_PTR(userdata); |
| |
| assert(bus); |
| assert(reply); |
| |
| return sd_bus_message_append(reply, "u", (uint32_t) u->user_record->uid); |
| } |
| |
| static int property_get_gid( |
| sd_bus *bus, |
| const char *path, |
| const char *interface, |
| const char *property, |
| sd_bus_message *reply, |
| void *userdata, |
| sd_bus_error *error) { |
| |
| User *u = ASSERT_PTR(userdata); |
| |
| assert(bus); |
| assert(reply); |
| |
| return sd_bus_message_append(reply, "u", (uint32_t) u->user_record->gid); |
| } |
| |
| static int property_get_name( |
| sd_bus *bus, |
| const char *path, |
| const char *interface, |
| const char *property, |
| sd_bus_message *reply, |
| void *userdata, |
| sd_bus_error *error) { |
| |
| User *u = ASSERT_PTR(userdata); |
| |
| assert(bus); |
| assert(reply); |
| |
| return sd_bus_message_append(reply, "s", u->user_record->user_name); |
| } |
| |
| static BUS_DEFINE_PROPERTY_GET2(property_get_state, "s", User, user_get_state, user_state_to_string); |
| |
| static int property_get_display( |
| 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 *p = NULL; |
| User *u = ASSERT_PTR(userdata); |
| |
| assert(bus); |
| assert(reply); |
| |
| p = u->display ? session_bus_path(u->display) : strdup("/"); |
| if (!p) |
| return -ENOMEM; |
| |
| return sd_bus_message_append(reply, "(so)", u->display ? u->display->id : "", p); |
| } |
| |
| static int property_get_sessions( |
| sd_bus *bus, |
| const char *path, |
| const char *interface, |
| const char *property, |
| sd_bus_message *reply, |
| void *userdata, |
| sd_bus_error *error) { |
| |
| User *u = ASSERT_PTR(userdata); |
| int r; |
| |
| assert(bus); |
| assert(reply); |
| |
| r = sd_bus_message_open_container(reply, 'a', "(so)"); |
| if (r < 0) |
| return r; |
| |
| LIST_FOREACH(sessions_by_user, session, u->sessions) { |
| _cleanup_free_ char *p = NULL; |
| |
| p = session_bus_path(session); |
| if (!p) |
| return -ENOMEM; |
| |
| r = sd_bus_message_append(reply, "(so)", session->id, p); |
| if (r < 0) |
| return r; |
| |
| } |
| |
| return sd_bus_message_close_container(reply); |
| } |
| |
| 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) { |
| |
| User *u = ASSERT_PTR(userdata); |
| |
| assert(bus); |
| assert(reply); |
| |
| return sd_bus_message_append(reply, "b", user_get_idle_hint(u, 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) { |
| |
| User *u = ASSERT_PTR(userdata); |
| dual_timestamp t = DUAL_TIMESTAMP_NULL; |
| uint64_t k; |
| |
| assert(bus); |
| assert(reply); |
| |
| (void) user_get_idle_hint(u, &t); |
| k = streq(property, "IdleSinceHint") ? t.realtime : t.monotonic; |
| |
| return sd_bus_message_append(reply, "t", k); |
| } |
| |
| static int property_get_linger( |
| sd_bus *bus, |
| const char *path, |
| const char *interface, |
| const char *property, |
| sd_bus_message *reply, |
| void *userdata, |
| sd_bus_error *error) { |
| |
| User *u = ASSERT_PTR(userdata); |
| int r; |
| |
| assert(bus); |
| assert(reply); |
| |
| r = user_check_linger_file(u); |
| |
| return sd_bus_message_append(reply, "b", r > 0); |
| } |
| |
| int bus_user_method_terminate(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
| User *u = ASSERT_PTR(userdata); |
| int r; |
| |
| assert(message); |
| |
| r = bus_verify_polkit_async( |
| message, |
| CAP_KILL, |
| "org.freedesktop.login1.manage", |
| NULL, |
| false, |
| u->user_record->uid, |
| &u->manager->polkit_registry, |
| error); |
| if (r < 0) |
| return r; |
| if (r == 0) |
| return 1; /* Will call us back */ |
| |
| r = user_stop(u, /* force = */ true); |
| if (r < 0) |
| return r; |
| |
| return sd_bus_reply_method_return(message, NULL); |
| } |
| |
| int bus_user_method_kill(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
| User *u = ASSERT_PTR(userdata); |
| int32_t signo; |
| int r; |
| |
| assert(message); |
| |
| r = bus_verify_polkit_async( |
| message, |
| CAP_KILL, |
| "org.freedesktop.login1.manage", |
| NULL, |
| false, |
| u->user_record->uid, |
| &u->manager->polkit_registry, |
| error); |
| if (r < 0) |
| return r; |
| if (r == 0) |
| return 1; /* Will call us back */ |
| |
| r = sd_bus_message_read(message, "i", &signo); |
| if (r < 0) |
| return r; |
| |
| if (!SIGNAL_VALID(signo)) |
| return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid signal %i", signo); |
| |
| r = user_kill(u, signo); |
| if (r < 0) |
| return r; |
| |
| return sd_bus_reply_method_return(message, NULL); |
| } |
| |
| static int user_object_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error) { |
| Manager *m = ASSERT_PTR(userdata); |
| uid_t uid; |
| User *user; |
| int r; |
| |
| assert(bus); |
| assert(path); |
| assert(interface); |
| assert(found); |
| |
| if (streq(path, "/org/freedesktop/login1/user/self")) { |
| sd_bus_message *message; |
| |
| message = sd_bus_get_current_message(bus); |
| |
| r = manager_get_user_from_creds(m, message, UID_INVALID, error, &user); |
| if (r == -ENXIO) { |
| sd_bus_error_free(error); |
| return 0; |
| } |
| if (r < 0) |
| return r; |
| } else { |
| const char *p; |
| |
| p = startswith(path, "/org/freedesktop/login1/user/_"); |
| if (!p) |
| return 0; |
| |
| r = parse_uid(p, &uid); |
| if (r < 0) |
| return 0; |
| |
| user = hashmap_get(m->users, UID_TO_PTR(uid)); |
| if (!user) |
| return 0; |
| } |
| |
| *found = user; |
| return 1; |
| } |
| |
| char *user_bus_path(User *u) { |
| char *s; |
| |
| assert(u); |
| |
| if (asprintf(&s, "/org/freedesktop/login1/user/_"UID_FMT, u->user_record->uid) < 0) |
| return NULL; |
| |
| return s; |
| } |
| |
| static int user_node_enumerator(sd_bus *bus, const char *path, void *userdata, char ***nodes, sd_bus_error *error) { |
| _cleanup_strv_free_ char **l = NULL; |
| sd_bus_message *message; |
| Manager *m = userdata; |
| User *user; |
| int r; |
| |
| assert(bus); |
| assert(path); |
| assert(nodes); |
| |
| HASHMAP_FOREACH(user, m->users) { |
| char *p; |
| |
| p = user_bus_path(user); |
| if (!p) |
| return -ENOMEM; |
| |
| r = strv_consume(&l, p); |
| if (r < 0) |
| return r; |
| } |
| |
| message = sd_bus_get_current_message(bus); |
| if (message) { |
| _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL; |
| |
| r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_OWNER_UID|SD_BUS_CREDS_AUGMENT, &creds); |
| if (r >= 0) { |
| uid_t uid; |
| |
| r = sd_bus_creds_get_owner_uid(creds, &uid); |
| if (r >= 0) { |
| user = hashmap_get(m->users, UID_TO_PTR(uid)); |
| if (user) { |
| r = strv_extend(&l, "/org/freedesktop/login1/user/self"); |
| if (r < 0) |
| return r; |
| } |
| } |
| } |
| } |
| |
| *nodes = TAKE_PTR(l); |
| |
| return 1; |
| } |
| |
| static const sd_bus_vtable user_vtable[] = { |
| SD_BUS_VTABLE_START(0), |
| |
| SD_BUS_PROPERTY("UID", "u", property_get_uid, 0, SD_BUS_VTABLE_PROPERTY_CONST), |
| SD_BUS_PROPERTY("GID", "u", property_get_gid, 0, SD_BUS_VTABLE_PROPERTY_CONST), |
| SD_BUS_PROPERTY("Name", "s", property_get_name, 0, SD_BUS_VTABLE_PROPERTY_CONST), |
| BUS_PROPERTY_DUAL_TIMESTAMP("Timestamp", offsetof(User, timestamp), SD_BUS_VTABLE_PROPERTY_CONST), |
| SD_BUS_PROPERTY("RuntimePath", "s", NULL, offsetof(User, runtime_path), SD_BUS_VTABLE_PROPERTY_CONST), |
| SD_BUS_PROPERTY("Service", "s", NULL, offsetof(User, service), SD_BUS_VTABLE_PROPERTY_CONST), |
| SD_BUS_PROPERTY("Slice", "s", NULL, offsetof(User, slice), SD_BUS_VTABLE_PROPERTY_CONST), |
| SD_BUS_PROPERTY("Display", "(so)", property_get_display, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), |
| SD_BUS_PROPERTY("State", "s", property_get_state, 0, 0), |
| SD_BUS_PROPERTY("Sessions", "a(so)", property_get_sessions, 0, 0), |
| 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("Linger", "b", property_get_linger, 0, 0), |
| |
| SD_BUS_METHOD("Terminate", NULL, NULL, bus_user_method_terminate, SD_BUS_VTABLE_UNPRIVILEGED), |
| SD_BUS_METHOD_WITH_ARGS("Kill", |
| SD_BUS_ARGS("i", signal_number), |
| SD_BUS_NO_RESULT, |
| bus_user_method_kill, |
| SD_BUS_VTABLE_UNPRIVILEGED), |
| |
| SD_BUS_VTABLE_END |
| }; |
| |
| const BusObjectImplementation user_object = { |
| "/org/freedesktop/login1/user", |
| "org.freedesktop.login1.User", |
| .fallback_vtables = BUS_FALLBACK_VTABLES({user_vtable, user_object_find}), |
| .node_enumerator = user_node_enumerator, |
| }; |
| |
| int user_send_signal(User *u, bool new_user) { |
| _cleanup_free_ char *p = NULL; |
| |
| assert(u); |
| |
| p = user_bus_path(u); |
| if (!p) |
| return -ENOMEM; |
| |
| return sd_bus_emit_signal( |
| u->manager->bus, |
| "/org/freedesktop/login1", |
| "org.freedesktop.login1.Manager", |
| new_user ? "UserNew" : "UserRemoved", |
| "uo", (uint32_t) u->user_record->uid, p); |
| } |
| |
| int user_send_changed(User *u, const char *properties, ...) { |
| _cleanup_free_ char *p = NULL; |
| char **l; |
| |
| assert(u); |
| |
| if (!u->started) |
| return 0; |
| |
| p = user_bus_path(u); |
| if (!p) |
| return -ENOMEM; |
| |
| l = strv_from_stdarg_alloca(properties); |
| |
| return sd_bus_emit_properties_changed_strv(u->manager->bus, p, "org.freedesktop.login1.User", l); |
| } |