| /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
| |
| /*** |
| This file is part of systemd. |
| |
| Copyright 2011 Lennart Poettering |
| |
| systemd is free software; you can redistribute it and/or modify it |
| under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2 of the License, or |
| (at your option) any later version. |
| |
| systemd is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with systemd; If not, see <http://www.gnu.org/licenses/>. |
| ***/ |
| |
| #include <errno.h> |
| #include <string.h> |
| |
| #include "logind.h" |
| #include "logind-user.h" |
| #include "dbus-common.h" |
| |
| #define BUS_USER_INTERFACE \ |
| " <interface name=\"org.freedesktop.login1.User\">\n" \ |
| " <method name=\"Terminate\"/>\n" \ |
| " <method name=\"Kill\">\n" \ |
| " <arg name=\"signal\" type=\"s\"/>\n" \ |
| " </method>\n" \ |
| " <property name=\"UID\" type=\"u\" access=\"read\"/>\n" \ |
| " <property name=\"GID\" type=\"u\" access=\"read\"/>\n" \ |
| " <property name=\"Name\" type=\"s\" access=\"read\"/>\n" \ |
| " <property name=\"Timestamp\" type=\"t\" access=\"read\"/>\n" \ |
| " <property name=\"TimestampMonotonic\" type=\"t\" access=\"read\"/>\n" \ |
| " <property name=\"RuntimePath\" type=\"s\" access=\"read\"/>\n" \ |
| " <property name=\"ControlGroupPath\" type=\"s\" access=\"read\"/>\n" \ |
| " <property name=\"Service\" type=\"s\" access=\"read\"/>\n" \ |
| " <property name=\"Display\" type=\"(so)\" access=\"read\"/>\n" \ |
| " <property name=\"State\" type=\"s\" access=\"read\"/>\n" \ |
| " <property name=\"Sessions\" type=\"a(so)\" access=\"read\"/>\n" \ |
| " <property name=\"IdleHint\" type=\"b\" access=\"read\"/>\n" \ |
| " <property name=\"IdleSinceHint\" type=\"t\" access=\"read\"/>\n" \ |
| " <property name=\"IdleSinceHintMonotonic\" type=\"t\" access=\"read\"/>\n" \ |
| " </interface>\n" \ |
| |
| #define INTROSPECTION \ |
| DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE \ |
| "<node>\n" \ |
| BUS_USER_INTERFACE \ |
| BUS_PROPERTIES_INTERFACE \ |
| BUS_PEER_INTERFACE \ |
| BUS_INTROSPECTABLE_INTERFACE \ |
| "</node>\n" |
| |
| #define INTERFACES_LIST \ |
| BUS_GENERIC_INTERFACES_LIST \ |
| "org.freedesktop.login1.User\0" |
| |
| static int bus_user_append_display(DBusMessageIter *i, const char *property, void *data) { |
| DBusMessageIter sub; |
| User *u = data; |
| const char *id, *path; |
| char *p = NULL; |
| |
| assert(i); |
| assert(property); |
| assert(u); |
| |
| if (!dbus_message_iter_open_container(i, DBUS_TYPE_STRUCT, NULL, &sub)) |
| return -ENOMEM; |
| |
| if (u->display) { |
| id = u->display->id; |
| path = p = session_bus_path(u->display); |
| |
| if (!p) |
| return -ENOMEM; |
| } else { |
| id = ""; |
| path = "/"; |
| } |
| |
| if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &id) || |
| !dbus_message_iter_append_basic(&sub, DBUS_TYPE_OBJECT_PATH, &path)) { |
| free(p); |
| return -ENOMEM; |
| } |
| |
| free(p); |
| |
| if (!dbus_message_iter_close_container(i, &sub)) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| |
| static int bus_user_append_state(DBusMessageIter *i, const char *property, void *data) { |
| User *u = data; |
| const char *state; |
| |
| assert(i); |
| assert(property); |
| assert(u); |
| |
| state = user_state_to_string(user_get_state(u)); |
| |
| if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &state)) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| |
| static int bus_user_append_sessions(DBusMessageIter *i, const char *property, void *data) { |
| DBusMessageIter sub, sub2; |
| User *u = data; |
| Session *session; |
| |
| assert(i); |
| assert(property); |
| assert(u); |
| |
| if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "(so)", &sub)) |
| return -ENOMEM; |
| |
| LIST_FOREACH(sessions_by_user, session, u->sessions) { |
| char *p; |
| |
| if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2)) |
| return -ENOMEM; |
| |
| p = session_bus_path(session); |
| if (!p) |
| return -ENOMEM; |
| |
| if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &session->id) || |
| !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &p)) { |
| free(p); |
| return -ENOMEM; |
| } |
| |
| free(p); |
| |
| if (!dbus_message_iter_close_container(&sub, &sub2)) |
| return -ENOMEM; |
| } |
| |
| if (!dbus_message_iter_close_container(i, &sub)) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| |
| static int bus_user_append_idle_hint(DBusMessageIter *i, const char *property, void *data) { |
| User *u = data; |
| dbus_bool_t b; |
| |
| assert(i); |
| assert(property); |
| assert(u); |
| |
| b = user_get_idle_hint(u, NULL) > 0; |
| |
| if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b)) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| |
| static int bus_user_append_idle_hint_since(DBusMessageIter *i, const char *property, void *data) { |
| User *u = data; |
| dual_timestamp t; |
| uint64_t k; |
| |
| assert(i); |
| assert(property); |
| assert(u); |
| |
| user_get_idle_hint(u, &t); |
| k = streq(property, "IdleSinceHint") ? t.realtime : t.monotonic; |
| |
| if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT64, &k)) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| |
| static int get_user_for_path(Manager *m, const char *path, User **_u) { |
| User *u; |
| unsigned long lu; |
| int r; |
| |
| assert(m); |
| assert(path); |
| assert(_u); |
| |
| if (!startswith(path, "/org/freedesktop/login1/user/")) |
| return -EINVAL; |
| |
| r = safe_atolu(path + 29, &lu); |
| if (r < 0) |
| return r; |
| |
| u = hashmap_get(m->users, ULONG_TO_PTR(lu)); |
| if (!u) |
| return -ENOENT; |
| |
| *_u = u; |
| return 0; |
| } |
| |
| static const BusProperty bus_login_user_properties[] = { |
| { "UID", bus_property_append_uid, "u", offsetof(User, uid) }, |
| { "GID", bus_property_append_gid, "u", offsetof(User, gid) }, |
| { "Name", bus_property_append_string, "s", offsetof(User, name), true }, |
| { "Timestamp", bus_property_append_usec, "t", offsetof(User, timestamp.realtime) }, |
| { "TimestampMonotonic", bus_property_append_usec, "t", offsetof(User, timestamp.monotonic) }, |
| { "RuntimePath", bus_property_append_string, "s", offsetof(User, runtime_path), true }, |
| { "ControlGroupPath", bus_property_append_string, "s", offsetof(User, cgroup_path), true }, |
| { "Service", bus_property_append_string, "s", offsetof(User, service), true }, |
| { "Display", bus_user_append_display, "(so)", 0 }, |
| { "State", bus_user_append_state, "s", 0 }, |
| { "Sessions", bus_user_append_sessions, "a(so)", 0 }, |
| { "IdleHint", bus_user_append_idle_hint, "b", 0 }, |
| { "IdleSinceHint", bus_user_append_idle_hint_since, "t", 0 }, |
| { "IdleSinceHintMonotonic", bus_user_append_idle_hint_since, "t", 0 }, |
| { NULL, } |
| }; |
| |
| static DBusHandlerResult user_message_dispatch( |
| User *u, |
| DBusConnection *connection, |
| DBusMessage *message) { |
| |
| DBusError error; |
| DBusMessage *reply = NULL; |
| int r; |
| |
| assert(u); |
| assert(connection); |
| assert(message); |
| |
| if (dbus_message_is_method_call(message, "org.freedesktop.login1.User", "Terminate")) { |
| |
| r = user_stop(u); |
| if (r < 0) |
| return bus_send_error_reply(connection, message, NULL, r); |
| |
| reply = dbus_message_new_method_return(message); |
| if (!reply) |
| goto oom; |
| } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.User", "Kill")) { |
| int32_t signo; |
| |
| if (!dbus_message_get_args( |
| message, |
| &error, |
| DBUS_TYPE_INT32, &signo, |
| DBUS_TYPE_INVALID)) |
| return bus_send_error_reply(connection, message, &error, -EINVAL); |
| |
| if (signo <= 0 || signo >= _NSIG) |
| return bus_send_error_reply(connection, message, &error, -EINVAL); |
| |
| r = user_kill(u, signo); |
| if (r < 0) |
| return bus_send_error_reply(connection, message, NULL, r); |
| |
| reply = dbus_message_new_method_return(message); |
| if (!reply) |
| goto oom; |
| |
| } else { |
| const BusBoundProperties bps[] = { |
| { "org.freedesktop.login1.User", bus_login_user_properties, u }, |
| { NULL, } |
| }; |
| |
| return bus_default_message_handler(connection, message, INTROSPECTION, INTERFACES_LIST, bps); |
| } |
| |
| if (reply) { |
| if (!dbus_connection_send(connection, reply, NULL)) |
| goto oom; |
| |
| dbus_message_unref(reply); |
| } |
| |
| return DBUS_HANDLER_RESULT_HANDLED; |
| |
| oom: |
| if (reply) |
| dbus_message_unref(reply); |
| |
| dbus_error_free(&error); |
| |
| return DBUS_HANDLER_RESULT_NEED_MEMORY; |
| } |
| |
| static DBusHandlerResult user_message_handler( |
| DBusConnection *connection, |
| DBusMessage *message, |
| void *userdata) { |
| |
| Manager *m = userdata; |
| User *u; |
| int r; |
| |
| r = get_user_for_path(m, dbus_message_get_path(message), &u); |
| if (r < 0) { |
| |
| if (r == -ENOMEM) |
| return DBUS_HANDLER_RESULT_NEED_MEMORY; |
| |
| if (r == -ENOENT) { |
| DBusError e; |
| |
| dbus_error_init(&e); |
| dbus_set_error_const(&e, DBUS_ERROR_UNKNOWN_OBJECT, "Unknown user"); |
| return bus_send_error_reply(connection, message, &e, r); |
| } |
| |
| return bus_send_error_reply(connection, message, NULL, r); |
| } |
| |
| return user_message_dispatch(u, connection, message); |
| } |
| |
| const DBusObjectPathVTable bus_user_vtable = { |
| .message_function = user_message_handler |
| }; |
| |
| char *user_bus_path(User *u) { |
| char *s; |
| |
| assert(u); |
| |
| if (asprintf(&s, "/org/freedesktop/login1/user/%llu", (unsigned long long) u->uid) < 0) |
| return NULL; |
| |
| return s; |
| } |
| |
| int user_send_signal(User *u, bool new_user) { |
| DBusMessage *m; |
| int r = -ENOMEM; |
| char *p = NULL; |
| uint32_t uid; |
| |
| assert(u); |
| |
| m = dbus_message_new_signal("/org/freedesktop/login1", |
| "org.freedesktop.login1.Manager", |
| new_user ? "UserNew" : "UserRemoved"); |
| |
| if (!m) |
| return -ENOMEM; |
| |
| p = user_bus_path(u); |
| if (!p) |
| goto finish; |
| |
| uid = u->uid; |
| |
| if (!dbus_message_append_args( |
| m, |
| DBUS_TYPE_UINT32, &uid, |
| DBUS_TYPE_OBJECT_PATH, &p, |
| DBUS_TYPE_INVALID)) |
| goto finish; |
| |
| if (!dbus_connection_send(u->manager->bus, m, NULL)) |
| goto finish; |
| |
| r = 0; |
| |
| finish: |
| dbus_message_unref(m); |
| free(p); |
| |
| return r; |
| } |
| |
| int user_send_changed(User *u, const char *properties) { |
| DBusMessage *m; |
| int r = -ENOMEM; |
| char *p = NULL; |
| |
| assert(u); |
| |
| if (!u->started) |
| return 0; |
| |
| p = user_bus_path(u); |
| if (!p) |
| return -ENOMEM; |
| |
| m = bus_properties_changed_new(p, "org.freedesktop.login1.User", properties); |
| if (!m) |
| goto finish; |
| |
| if (!dbus_connection_send(u->manager->bus, m, NULL)) |
| goto finish; |
| |
| r = 0; |
| |
| finish: |
| if (m) |
| dbus_message_unref(m); |
| free(p); |
| |
| return r; |
| } |