| /*-*- 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 Lesser General Public License as published by |
| the Free Software Foundation; either version 2.1 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 |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser 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-session.h" |
| #include "dbus-common.h" |
| #include "util.h" |
| |
| #define BUS_SESSION_INTERFACE \ |
| " <interface name=\"org.freedesktop.login1.Session\">\n" \ |
| " <method name=\"Terminate\"/>\n" \ |
| " <method name=\"Activate\"/>\n" \ |
| " <method name=\"Lock\"/>\n" \ |
| " <method name=\"Unlock\"/>\n" \ |
| " <method name=\"SetIdleHint\">\n" \ |
| " <arg name=\"b\" type=\"b\"/>\n" \ |
| " </method>\n" \ |
| " <method name=\"Kill\">\n" \ |
| " <arg name=\"who\" type=\"s\"/>\n" \ |
| " <arg name=\"signal\" type=\"s\"/>\n" \ |
| " </method>\n" \ |
| " <property name=\"Id\" type=\"s\" access=\"read\"/>\n" \ |
| " <property name=\"User\" type=\"(uo)\" 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=\"ControlGroupPath\" type=\"s\" access=\"read\"/>\n" \ |
| " <property name=\"VTNr\" type=\"u\" access=\"read\"/>\n" \ |
| " <property name=\"Seat\" type=\"(so)\" access=\"read\"/>\n" \ |
| " <property name=\"TTY\" type=\"s\" access=\"read\"/>\n" \ |
| " <property name=\"Display\" type=\"s\" access=\"read\"/>\n" \ |
| " <property name=\"Remote\" type=\"b\" access=\"read\"/>\n" \ |
| " <property name=\"RemoteHost\" type=\"s\" access=\"read\"/>\n" \ |
| " <property name=\"RemoteUser\" type=\"s\" access=\"read\"/>\n" \ |
| " <property name=\"Service\" type=\"s\" access=\"read\"/>\n" \ |
| " <property name=\"Leader\" type=\"u\" access=\"read\"/>\n" \ |
| " <property name=\"Audit\" type=\"u\" access=\"read\"/>\n" \ |
| " <property name=\"Type\" type=\"s\" access=\"read\"/>\n" \ |
| " <property name=\"Class\" type=\"s\" access=\"read\"/>\n" \ |
| " <property name=\"Active\" type=\"b\" access=\"read\"/>\n" \ |
| " <property name=\"Controllers\" type=\"as\" access=\"read\"/>\n" \ |
| " <property name=\"ResetControllers\" type=\"as\" access=\"read\"/>\n" \ |
| " <property name=\"KillProcesses\" type=\"b\" 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_SESSION_INTERFACE \ |
| BUS_PROPERTIES_INTERFACE \ |
| BUS_PEER_INTERFACE \ |
| BUS_INTROSPECTABLE_INTERFACE \ |
| "</node>\n" |
| |
| #define INTERFACES_LIST \ |
| BUS_GENERIC_INTERFACES_LIST \ |
| "org.freedesktop.login1.Session\0" |
| |
| static int bus_session_append_seat(DBusMessageIter *i, const char *property, void *data) { |
| DBusMessageIter sub; |
| Session *s = data; |
| const char *id, *path; |
| char *p = NULL; |
| |
| assert(i); |
| assert(property); |
| assert(s); |
| |
| if (!dbus_message_iter_open_container(i, DBUS_TYPE_STRUCT, NULL, &sub)) |
| return -ENOMEM; |
| |
| if (s->seat) { |
| id = s->seat->id; |
| path = p = seat_bus_path(s->seat); |
| |
| 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_session_append_user(DBusMessageIter *i, const char *property, void *data) { |
| DBusMessageIter sub; |
| User *u = data; |
| char *p = NULL; |
| |
| assert(i); |
| assert(property); |
| assert(u); |
| |
| if (!dbus_message_iter_open_container(i, DBUS_TYPE_STRUCT, NULL, &sub)) |
| return -ENOMEM; |
| |
| p = user_bus_path(u); |
| if (!p) |
| return -ENOMEM; |
| |
| if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_UINT32, &u->uid) || |
| !dbus_message_iter_append_basic(&sub, DBUS_TYPE_OBJECT_PATH, &p)) { |
| free(p); |
| return -ENOMEM; |
| } |
| |
| free(p); |
| |
| if (!dbus_message_iter_close_container(i, &sub)) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| |
| static int bus_session_append_active(DBusMessageIter *i, const char *property, void *data) { |
| Session *s = data; |
| dbus_bool_t b; |
| |
| assert(i); |
| assert(property); |
| assert(s); |
| |
| b = session_is_active(s); |
| if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b)) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| |
| static int bus_session_append_idle_hint(DBusMessageIter *i, const char *property, void *data) { |
| Session *s = data; |
| int b; |
| |
| assert(i); |
| assert(property); |
| assert(s); |
| |
| b = session_get_idle_hint(s, NULL) > 0; |
| if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b)) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| |
| static int bus_session_append_idle_hint_since(DBusMessageIter *i, const char *property, void *data) { |
| Session *s = data; |
| dual_timestamp t; |
| uint64_t u; |
| |
| assert(i); |
| assert(property); |
| assert(s); |
| |
| session_get_idle_hint(s, &t); |
| u = streq(property, "IdleSinceHint") ? t.realtime : t.monotonic; |
| |
| if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT64, &u)) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| |
| static DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_session_append_type, session_type, SessionType); |
| static DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_session_append_class, session_class, SessionClass); |
| |
| static int get_session_for_path(Manager *m, const char *path, Session **_s) { |
| Session *s; |
| char *id; |
| |
| assert(m); |
| assert(path); |
| assert(_s); |
| |
| if (!startswith(path, "/org/freedesktop/login1/session/")) |
| return -EINVAL; |
| |
| id = bus_path_unescape(path + 32); |
| if (!id) |
| return -ENOMEM; |
| |
| s = hashmap_get(m->sessions, id); |
| free(id); |
| |
| if (!s) |
| return -ENOENT; |
| |
| *_s = s; |
| return 0; |
| } |
| |
| static const BusProperty bus_login_session_properties[] = { |
| { "Id", bus_property_append_string, "s", offsetof(Session, id), true }, |
| { "Timestamp", bus_property_append_usec, "t", offsetof(Session, timestamp.realtime) }, |
| { "TimestampMonotonic", bus_property_append_usec, "t", offsetof(Session, timestamp.monotonic) }, |
| { "ControlGroupPath", bus_property_append_string, "s", offsetof(Session, cgroup_path), true }, |
| { "VTNr", bus_property_append_uint32, "u", offsetof(Session, vtnr) }, |
| { "Seat", bus_session_append_seat, "(so)", 0 }, |
| { "TTY", bus_property_append_string, "s", offsetof(Session, tty), true }, |
| { "Display", bus_property_append_string, "s", offsetof(Session, display), true }, |
| { "Remote", bus_property_append_bool, "b", offsetof(Session, remote) }, |
| { "RemoteUser", bus_property_append_string, "s", offsetof(Session, remote_user), true }, |
| { "RemoteHost", bus_property_append_string, "s", offsetof(Session, remote_host), true }, |
| { "Service", bus_property_append_string, "s", offsetof(Session, service), true }, |
| { "Leader", bus_property_append_pid, "u", offsetof(Session, leader) }, |
| { "Audit", bus_property_append_uint32, "u", offsetof(Session, audit_id) }, |
| { "Type", bus_session_append_type, "s", offsetof(Session, type) }, |
| { "Class", bus_session_append_class, "s", offsetof(Session, class) }, |
| { "Active", bus_session_append_active, "b", 0 }, |
| { "Controllers", bus_property_append_strv, "as", offsetof(Session, controllers), true }, |
| { "ResetControllers", bus_property_append_strv, "as", offsetof(Session, reset_controllers), true }, |
| { "KillProcesses", bus_property_append_bool, "b", offsetof(Session, kill_processes) }, |
| { "IdleHint", bus_session_append_idle_hint, "b", 0 }, |
| { "IdleSinceHint", bus_session_append_idle_hint_since, "t", 0 }, |
| { "IdleSinceHintMonotonic", bus_session_append_idle_hint_since, "t", 0 }, |
| { NULL, } |
| }; |
| |
| static const BusProperty bus_login_session_user_properties[] = { |
| { "User", bus_session_append_user, "(uo)", 0 }, |
| { "Name", bus_property_append_string, "s", offsetof(User, name), true }, |
| { NULL, } |
| }; |
| |
| static DBusHandlerResult session_message_dispatch( |
| Session *s, |
| DBusConnection *connection, |
| DBusMessage *message) { |
| |
| DBusError error; |
| DBusMessage *reply = NULL; |
| int r; |
| |
| assert(s); |
| assert(connection); |
| assert(message); |
| |
| dbus_error_init(&error); |
| |
| if (dbus_message_is_method_call(message, "org.freedesktop.login1.Session", "Terminate")) { |
| |
| r = session_stop(s); |
| 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.Session", "Activate")) { |
| |
| r = session_activate(s); |
| 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.Session", "Lock") || |
| dbus_message_is_method_call(message, "org.freedesktop.login1.Session", "Unlock")) { |
| |
| if (session_send_lock(s, streq(dbus_message_get_member(message), "Lock")) < 0) |
| goto oom; |
| |
| reply = dbus_message_new_method_return(message); |
| if (!reply) |
| goto oom; |
| |
| } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Session", "SetIdleHint")) { |
| dbus_bool_t b; |
| unsigned long ul; |
| |
| if (!dbus_message_get_args( |
| message, |
| &error, |
| DBUS_TYPE_BOOLEAN, &b, |
| DBUS_TYPE_INVALID)) |
| return bus_send_error_reply(connection, message, &error, -EINVAL); |
| |
| ul = dbus_bus_get_unix_user(connection, dbus_message_get_sender(message), &error); |
| if (ul == (unsigned long) -1) |
| return bus_send_error_reply(connection, message, &error, -EIO); |
| |
| if (ul != 0 && ul != s->user->uid) |
| return bus_send_error_reply(connection, message, NULL, -EPERM); |
| |
| session_set_idle_hint(s, b); |
| |
| reply = dbus_message_new_method_return(message); |
| if (!reply) |
| goto oom; |
| |
| } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Session", "Kill")) { |
| const char *swho; |
| int32_t signo; |
| KillWho who; |
| |
| if (!dbus_message_get_args( |
| message, |
| &error, |
| DBUS_TYPE_STRING, &swho, |
| DBUS_TYPE_INT32, &signo, |
| DBUS_TYPE_INVALID)) |
| return bus_send_error_reply(connection, message, &error, -EINVAL); |
| |
| if (isempty(swho)) |
| who = KILL_ALL; |
| else { |
| who = kill_who_from_string(swho); |
| if (who < 0) |
| return bus_send_error_reply(connection, message, &error, -EINVAL); |
| } |
| |
| if (signo <= 0 || signo >= _NSIG) |
| return bus_send_error_reply(connection, message, &error, -EINVAL); |
| |
| r = session_kill(s, who, 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.Session", bus_login_session_properties, s }, |
| { "org.freedesktop.login1.Session", bus_login_session_user_properties, s->user }, |
| { 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 session_message_handler( |
| DBusConnection *connection, |
| DBusMessage *message, |
| void *userdata) { |
| |
| Manager *m = userdata; |
| Session *s; |
| int r; |
| |
| r = get_session_for_path(m, dbus_message_get_path(message), &s); |
| 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 session"); |
| return bus_send_error_reply(connection, message, &e, r); |
| } |
| |
| return bus_send_error_reply(connection, message, NULL, r); |
| } |
| |
| return session_message_dispatch(s, connection, message); |
| } |
| |
| const DBusObjectPathVTable bus_session_vtable = { |
| .message_function = session_message_handler |
| }; |
| |
| char *session_bus_path(Session *s) { |
| char *t, *r; |
| |
| assert(s); |
| |
| t = bus_path_escape(s->id); |
| if (!t) |
| return NULL; |
| |
| r = strappend("/org/freedesktop/login1/session/", t); |
| free(t); |
| |
| return r; |
| } |
| |
| int session_send_signal(Session *s, bool new_session) { |
| DBusMessage *m; |
| int r = -ENOMEM; |
| char *p = NULL; |
| |
| assert(s); |
| |
| m = dbus_message_new_signal("/org/freedesktop/login1", |
| "org.freedesktop.login1.Manager", |
| new_session ? "SessionNew" : "SessionRemoved"); |
| |
| if (!m) |
| return -ENOMEM; |
| |
| p = session_bus_path(s); |
| if (!p) |
| goto finish; |
| |
| if (!dbus_message_append_args( |
| m, |
| DBUS_TYPE_STRING, &s->id, |
| DBUS_TYPE_OBJECT_PATH, &p, |
| DBUS_TYPE_INVALID)) |
| goto finish; |
| |
| if (!dbus_connection_send(s->manager->bus, m, NULL)) |
| goto finish; |
| |
| r = 0; |
| |
| finish: |
| dbus_message_unref(m); |
| free(p); |
| |
| return r; |
| } |
| |
| int session_send_changed(Session *s, const char *properties) { |
| DBusMessage *m; |
| int r = -ENOMEM; |
| char *p = NULL; |
| |
| assert(s); |
| |
| if (!s->started) |
| return 0; |
| |
| p = session_bus_path(s); |
| if (!p) |
| return -ENOMEM; |
| |
| m = bus_properties_changed_new(p, "org.freedesktop.login1.Session", properties); |
| if (!m) |
| goto finish; |
| |
| if (!dbus_connection_send(s->manager->bus, m, NULL)) |
| goto finish; |
| |
| r = 0; |
| |
| finish: |
| if (m) |
| dbus_message_unref(m); |
| free(p); |
| |
| return r; |
| } |
| |
| int session_send_lock(Session *s, bool lock) { |
| DBusMessage *m; |
| bool b; |
| char *p; |
| |
| assert(s); |
| |
| p = session_bus_path(s); |
| if (!p) |
| return -ENOMEM; |
| |
| m = dbus_message_new_signal(p, "org.freedesktop.login1.Session", lock ? "Lock" : "Unlock"); |
| free(p); |
| |
| if (!m) |
| return -ENOMEM; |
| |
| b = dbus_connection_send(s->manager->bus, m, NULL); |
| dbus_message_unref(m); |
| |
| if (!b) |
| return -ENOMEM; |
| |
| return 0; |
| } |