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-rw-r--r--src/login/logind-user-dbus.c421
1 files changed, 421 insertions, 0 deletions
diff --git a/src/login/logind-user-dbus.c b/src/login/logind-user-dbus.c
new file mode 100644
index 0000000..88649b2
--- /dev/null
+++ b/src/login/logind-user-dbus.c
@@ -0,0 +1,421 @@
+/* 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);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-30 12:34:22 +0000