diff options
Diffstat (limited to 'src/login/logind-user-dbus.c')
| -rw-r--r-- | src/login/logind-user-dbus.c | 411 |
1 files changed, 411 insertions, 0 deletions
diff --git a/src/login/logind-user-dbus.c b/src/login/logind-user-dbus.c new file mode 100644 index 0000000000..3673a28bd4 --- /dev/null +++ b/src/login/logind-user-dbus.c @@ -0,0 +1,411 @@ +/*-*- 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 DBusHandlerResult user_message_dispatch( + User *u, + DBusConnection *connection, + DBusMessage *message) { + + const BusProperty properties[] = { + { "org.freedesktop.login1.User", "UID", bus_property_append_uid, "u", &u->uid }, + { "org.freedesktop.login1.User", "GID", bus_property_append_gid, "u", &u->gid }, + { "org.freedesktop.login1.User", "Name", bus_property_append_string, "s", u->name }, + { "org.freedesktop.login1.User", "Timestamp", bus_property_append_usec, "t", &u->timestamp.realtime }, + { "org.freedesktop.login1.User", "TimestampMonotonic", bus_property_append_usec, "t", &u->timestamp.monotonic }, + { "org.freedesktop.login1.User", "RuntimePath", bus_property_append_string, "s", u->runtime_path }, + { "org.freedesktop.login1.User", "ControlGroupPath", bus_property_append_string, "s", u->cgroup_path }, + { "org.freedesktop.login1.User", "Service", bus_property_append_string, "s", u->service }, + { "org.freedesktop.login1.User", "Display", bus_user_append_display, "(so)", u }, + { "org.freedesktop.login1.User", "State", bus_user_append_state, "s", u }, + { "org.freedesktop.login1.User", "Sessions", bus_user_append_sessions, "a(so)", u }, + { "org.freedesktop.login1.User", "IdleHint", bus_user_append_idle_hint, "b", u }, + { "org.freedesktop.login1.User", "IdleSinceHint", bus_user_append_idle_hint_since, "t", u }, + { "org.freedesktop.login1.User", "IdleSinceHintMonotonic", bus_user_append_idle_hint_since, "t", u }, + { NULL, NULL, NULL, NULL, NULL } + }; + + 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 + return bus_default_message_handler(connection, message, INTROSPECTION, INTERFACES_LIST, properties); + + 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; +} |