438 lines
14 KiB
C
438 lines
14 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2011 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <errno.h>
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#include <string.h>
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#include "logind.h"
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#include "logind-user.h"
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#include "dbus-common.h"
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#define BUS_USER_INTERFACE \
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" <interface name=\"org.freedesktop.login1.User\">\n" \
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" <method name=\"Terminate\"/>\n" \
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" <method name=\"Kill\">\n" \
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" <arg name=\"signal\" type=\"s\"/>\n" \
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" </method>\n" \
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" <property name=\"UID\" type=\"u\" access=\"read\"/>\n" \
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" <property name=\"GID\" type=\"u\" access=\"read\"/>\n" \
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" <property name=\"Name\" type=\"s\" access=\"read\"/>\n" \
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" <property name=\"Timestamp\" type=\"t\" access=\"read\"/>\n" \
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" <property name=\"TimestampMonotonic\" type=\"t\" access=\"read\"/>\n" \
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" <property name=\"RuntimePath\" type=\"s\" access=\"read\"/>\n" \
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" <property name=\"DefaultControlGroup\" type=\"s\" access=\"read\"/>\n" \
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" <property name=\"Service\" type=\"s\" access=\"read\"/>\n" \
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" <property name=\"Display\" type=\"(so)\" access=\"read\"/>\n" \
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" <property name=\"State\" type=\"s\" access=\"read\"/>\n" \
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" <property name=\"Sessions\" type=\"a(so)\" access=\"read\"/>\n" \
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" <property name=\"IdleHint\" type=\"b\" access=\"read\"/>\n" \
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" <property name=\"IdleSinceHint\" type=\"t\" access=\"read\"/>\n" \
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" <property name=\"IdleSinceHintMonotonic\" type=\"t\" access=\"read\"/>\n" \
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" </interface>\n" \
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#define INTROSPECTION \
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DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE \
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"<node>\n" \
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BUS_USER_INTERFACE \
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BUS_PROPERTIES_INTERFACE \
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BUS_PEER_INTERFACE \
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BUS_INTROSPECTABLE_INTERFACE \
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"</node>\n"
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#define INTERFACES_LIST \
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BUS_GENERIC_INTERFACES_LIST \
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"org.freedesktop.login1.User\0"
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static int bus_user_append_display(DBusMessageIter *i, const char *property, void *data) {
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DBusMessageIter sub;
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User *u = data;
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const char *id, *path;
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char *p = NULL;
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assert(i);
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assert(property);
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assert(u);
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if (!dbus_message_iter_open_container(i, DBUS_TYPE_STRUCT, NULL, &sub))
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return -ENOMEM;
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if (u->display) {
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id = u->display->id;
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path = p = session_bus_path(u->display);
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if (!p)
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return -ENOMEM;
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} else {
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id = "";
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path = "/";
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}
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if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &id) ||
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!dbus_message_iter_append_basic(&sub, DBUS_TYPE_OBJECT_PATH, &path)) {
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free(p);
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return -ENOMEM;
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}
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free(p);
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if (!dbus_message_iter_close_container(i, &sub))
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return -ENOMEM;
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return 0;
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}
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static int bus_user_append_state(DBusMessageIter *i, const char *property, void *data) {
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User *u = data;
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const char *state;
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assert(i);
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assert(property);
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assert(u);
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state = user_state_to_string(user_get_state(u));
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if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &state))
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return -ENOMEM;
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return 0;
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}
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static int bus_user_append_sessions(DBusMessageIter *i, const char *property, void *data) {
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DBusMessageIter sub, sub2;
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User *u = data;
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Session *session;
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assert(i);
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assert(property);
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assert(u);
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if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "(so)", &sub))
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return -ENOMEM;
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LIST_FOREACH(sessions_by_user, session, u->sessions) {
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char *p;
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if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2))
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return -ENOMEM;
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p = session_bus_path(session);
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if (!p)
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return -ENOMEM;
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if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &session->id) ||
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!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &p)) {
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free(p);
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return -ENOMEM;
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}
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free(p);
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if (!dbus_message_iter_close_container(&sub, &sub2))
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return -ENOMEM;
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}
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if (!dbus_message_iter_close_container(i, &sub))
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return -ENOMEM;
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return 0;
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}
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static int bus_user_append_idle_hint(DBusMessageIter *i, const char *property, void *data) {
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User *u = data;
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dbus_bool_t b;
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assert(i);
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assert(property);
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assert(u);
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b = user_get_idle_hint(u, NULL) > 0;
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if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b))
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return -ENOMEM;
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return 0;
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}
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static int bus_user_append_idle_hint_since(DBusMessageIter *i, const char *property, void *data) {
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User *u = data;
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dual_timestamp t;
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uint64_t k;
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assert(i);
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assert(property);
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assert(u);
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user_get_idle_hint(u, &t);
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k = streq(property, "IdleSinceHint") ? t.realtime : t.monotonic;
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if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT64, &k))
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return -ENOMEM;
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return 0;
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}
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static int bus_user_append_default_cgroup(DBusMessageIter *i, const char *property, void *data) {
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User *u = data;
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char *t;
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int r;
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bool success;
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assert(i);
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assert(property);
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assert(u);
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r = cg_join_spec(SYSTEMD_CGROUP_CONTROLLER, u->cgroup_path, &t);
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if (r < 0)
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return r;
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success = dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t);
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free(t);
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return success ? 0 : -ENOMEM;
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}
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static int get_user_for_path(Manager *m, const char *path, User **_u) {
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User *u;
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unsigned long lu;
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int r;
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assert(m);
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assert(path);
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assert(_u);
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if (!startswith(path, "/org/freedesktop/login1/user/"))
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return -EINVAL;
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r = safe_atolu(path + 29, &lu);
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if (r < 0)
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return r;
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u = hashmap_get(m->users, ULONG_TO_PTR(lu));
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if (!u)
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return -ENOENT;
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*_u = u;
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return 0;
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}
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static const BusProperty bus_login_user_properties[] = {
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{ "UID", bus_property_append_uid, "u", offsetof(User, uid) },
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{ "GID", bus_property_append_gid, "u", offsetof(User, gid) },
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{ "Name", bus_property_append_string, "s", offsetof(User, name), true },
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{ "Timestamp", bus_property_append_usec, "t", offsetof(User, timestamp.realtime) },
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{ "TimestampMonotonic", bus_property_append_usec, "t", offsetof(User, timestamp.monotonic) },
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{ "RuntimePath", bus_property_append_string, "s", offsetof(User, runtime_path), true },
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{ "DefaultControlGroup", bus_user_append_default_cgroup, "s", 0 },
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{ "Service", bus_property_append_string, "s", offsetof(User, service), true },
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{ "Display", bus_user_append_display, "(so)", 0 },
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{ "State", bus_user_append_state, "s", 0 },
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{ "Sessions", bus_user_append_sessions, "a(so)", 0 },
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{ "IdleHint", bus_user_append_idle_hint, "b", 0 },
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{ "IdleSinceHint", bus_user_append_idle_hint_since, "t", 0 },
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{ "IdleSinceHintMonotonic", bus_user_append_idle_hint_since, "t", 0 },
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{ NULL, }
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};
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static DBusHandlerResult user_message_dispatch(
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User *u,
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DBusConnection *connection,
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DBusMessage *message) {
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DBusError error;
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DBusMessage *reply = NULL;
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int r;
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assert(u);
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assert(connection);
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assert(message);
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if (dbus_message_is_method_call(message, "org.freedesktop.login1.User", "Terminate")) {
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r = user_stop(u);
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if (r < 0)
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return bus_send_error_reply(connection, message, NULL, r);
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reply = dbus_message_new_method_return(message);
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if (!reply)
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goto oom;
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} else if (dbus_message_is_method_call(message, "org.freedesktop.login1.User", "Kill")) {
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int32_t signo;
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if (!dbus_message_get_args(
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message,
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&error,
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DBUS_TYPE_INT32, &signo,
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DBUS_TYPE_INVALID))
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return bus_send_error_reply(connection, message, &error, -EINVAL);
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if (signo <= 0 || signo >= _NSIG)
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return bus_send_error_reply(connection, message, &error, -EINVAL);
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r = user_kill(u, signo);
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if (r < 0)
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return bus_send_error_reply(connection, message, NULL, r);
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reply = dbus_message_new_method_return(message);
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if (!reply)
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goto oom;
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} else {
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const BusBoundProperties bps[] = {
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{ "org.freedesktop.login1.User", bus_login_user_properties, u },
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{ NULL, }
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};
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return bus_default_message_handler(connection, message, INTROSPECTION, INTERFACES_LIST, bps);
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}
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if (reply) {
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if (!dbus_connection_send(connection, reply, NULL))
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goto oom;
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dbus_message_unref(reply);
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}
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return DBUS_HANDLER_RESULT_HANDLED;
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oom:
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if (reply)
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dbus_message_unref(reply);
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dbus_error_free(&error);
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return DBUS_HANDLER_RESULT_NEED_MEMORY;
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}
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static DBusHandlerResult user_message_handler(
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DBusConnection *connection,
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DBusMessage *message,
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void *userdata) {
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Manager *m = userdata;
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User *u;
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int r;
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r = get_user_for_path(m, dbus_message_get_path(message), &u);
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if (r < 0) {
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if (r == -ENOMEM)
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return DBUS_HANDLER_RESULT_NEED_MEMORY;
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if (r == -ENOENT) {
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DBusError e;
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dbus_error_init(&e);
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dbus_set_error_const(&e, DBUS_ERROR_UNKNOWN_OBJECT, "Unknown user");
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return bus_send_error_reply(connection, message, &e, r);
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}
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return bus_send_error_reply(connection, message, NULL, r);
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}
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return user_message_dispatch(u, connection, message);
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}
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const DBusObjectPathVTable bus_user_vtable = {
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.message_function = user_message_handler
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};
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char *user_bus_path(User *u) {
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char *s;
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assert(u);
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if (asprintf(&s, "/org/freedesktop/login1/user/%llu", (unsigned long long) u->uid) < 0)
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return NULL;
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return s;
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}
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int user_send_signal(User *u, bool new_user) {
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DBusMessage *m;
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int r = -ENOMEM;
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char *p = NULL;
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uint32_t uid;
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assert(u);
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m = dbus_message_new_signal("/org/freedesktop/login1",
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"org.freedesktop.login1.Manager",
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new_user ? "UserNew" : "UserRemoved");
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if (!m)
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return -ENOMEM;
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p = user_bus_path(u);
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if (!p)
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goto finish;
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uid = u->uid;
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if (!dbus_message_append_args(
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m,
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DBUS_TYPE_UINT32, &uid,
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DBUS_TYPE_OBJECT_PATH, &p,
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DBUS_TYPE_INVALID))
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goto finish;
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if (!dbus_connection_send(u->manager->bus, m, NULL))
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goto finish;
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r = 0;
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finish:
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dbus_message_unref(m);
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free(p);
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return r;
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}
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int user_send_changed(User *u, const char *properties) {
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DBusMessage *m;
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int r = -ENOMEM;
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char *p = NULL;
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assert(u);
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if (!u->started)
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return 0;
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p = user_bus_path(u);
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if (!p)
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return -ENOMEM;
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m = bus_properties_changed_new(p, "org.freedesktop.login1.User", properties);
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if (!m)
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goto finish;
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if (!dbus_connection_send(u->manager->bus, m, NULL))
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goto finish;
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r = 0;
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finish:
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if (m)
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dbus_message_unref(m);
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free(p);
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return r;
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}
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