#include <errno.h>

#include <string.h>

#include "logind.h"

#include "logind-seat.h"

#include "dbus-common.h"

#include "util.h"

#define BUS_SEAT_INTERFACE \

" <interface name=\"org.freedesktop.login1.Seat\">\n" \

" <method name=\"Terminate\"/>\n" \

" <method name=\"ActivateSession\">\n" \

" <arg name=\"id\" type=\"s\"/>\n" \

" </method>\n" \

" <property name=\"Id\" type=\"s\" access=\"read\"/>\n" \

" <property name=\"ActiveSession\" type=\"so\" access=\"read\"/>\n" \

" <property name=\"CanMultiSession\" type=\"b\" 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_SEAT_INTERFACE \

BUS_PROPERTIES_INTERFACE \

BUS_PEER_INTERFACE \

BUS_INTROSPECTABLE_INTERFACE \

"</node>\n"

#define INTERFACES_LIST \

BUS_GENERIC_INTERFACES_LIST \

"org.freedesktop.login1.Seat\0"

static int bus_seat_append_active(DBusMessageIter *i, const char *property, void *data) {

DBusMessageIter sub;

Seat *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->active) {

id = s->active->id;

path = p = session_bus_path(s->active);

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_seat_append_sessions(DBusMessageIter *i, const char *property, void *data) {

DBusMessageIter sub, sub2;

Seat *s = data;

Session *session;

assert(i);

assert(property);

assert(s);

if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "(so)", &sub))

return -ENOMEM;

LIST_FOREACH(sessions_by_seat, session, s->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_seat_append_multi_session(DBusMessageIter *i, const char *property, void *data) {

Seat *s = data;

dbus_bool_t b;

assert(i);

assert(property);

assert(s);

b = seat_can_multi_session(s);

if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b))

return -ENOMEM;

return 0;

}

static int bus_seat_append_idle_hint(DBusMessageIter *i, const char *property, void *data) {

Seat *s = data;

dbus_bool_t b;

assert(i);

assert(property);

assert(s);

b = seat_get_idle_hint(s, NULL) > 0;

if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b))

return -ENOMEM;

return 0;

}

static int bus_seat_append_idle_hint_since(DBusMessageIter *i, const char *property, void *data) {

Seat *s = data;

dual_timestamp t;

uint64_t k;

assert(i);

assert(property);

assert(s);

seat_get_idle_hint(s, &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_seat_for_path(Manager *m, const char *path, Seat **_s) {

Seat *s;

char *id;

assert(m);

assert(path);

assert(_s);

if (!startswith(path, "/org/freedesktop/login1/seat/"))

return -EINVAL;

id = bus_path_unescape(path + 29);

if (!id)

return -ENOMEM;

s = hashmap_get(m->seats, id);

free(id);

if (!s)

return -ENOENT;

*_s = s;

return 0;

}

static const BusProperty bus_login_seat_properties[] = {

{ "Id", bus_property_append_string, "s", offsetof(Seat, id), true },

{ "ActiveSession", bus_seat_append_active, "(so)", 0 },

{ "CanMultiSession", bus_seat_append_multi_session, "b", 0 },

{ "Sessions", bus_seat_append_sessions, "a(so)", 0 },

{ "IdleHint", bus_seat_append_idle_hint, "b", 0 },

{ "IdleSinceHint", bus_seat_append_idle_hint_since, "t", 0 },

{ "IdleSinceHintMonotonic", bus_seat_append_idle_hint_since, "t", 0 },

{ NULL, }

};

static DBusHandlerResult seat_message_dispatch(

Seat *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.Seat", "Terminate")) {

r = seat_stop_sessions(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.Seat", "ActivateSession")) {

const char *name;

Session *session;

if (!dbus_message_get_args(

message,

&error,

DBUS_TYPE_STRING, &name,

DBUS_TYPE_INVALID))

return bus_send_error_reply(connection, message, &error, -EINVAL);

session = hashmap_get(s->manager->sessions, name);

if (!session || session->seat != s)

return bus_send_error_reply(connection, message, &error, -ENOENT);

r = session_activate(session);

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.Seat", bus_login_seat_properties, s },

{ 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 seat_message_handler(

DBusConnection *connection,

DBusMessage *message,

void *userdata) {

Manager *m = userdata;

Seat *s;

int r;

r = get_seat_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 seat");

return bus_send_error_reply(connection, message, &e, r);

}

return bus_send_error_reply(connection, message, NULL, r);

}

return seat_message_dispatch(s, connection, message);

}

const DBusObjectPathVTable bus_seat_vtable = {

.message_function = seat_message_handler

};

char *seat_bus_path(Seat *s) {

char *t, *r;

assert(s);

t = bus_path_escape(s->id);

if (!t)

return NULL;

r = strappend("/org/freedesktop/login1/seat/", t);

free(t);

return r;

}

int seat_send_signal(Seat *s, bool new_seat) {

DBusMessage *m;

int r = -ENOMEM;

char *p = NULL;

assert(s);

m = dbus_message_new_signal("/org/freedesktop/login1",

"org.freedesktop.login1.Manager",

new_seat ? "SeatNew" : "SeatRemoved");

if (!m)

return -ENOMEM;

p = seat_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 seat_send_changed(Seat *s, const char *properties) {

DBusMessage *m;

int r = -ENOMEM;

char *p = NULL;

assert(s);

if (!s->started)

return 0;

p = seat_bus_path(s);

if (!p)

return -ENOMEM;

m = bus_properties_changed_new(p, "org.freedesktop.login1.Seat", 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;

}