logind-seat-dbus.c revision 28383ba18963cdedd98ced271b3425f7321119b7
/*-*- 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 "util.h"
#include "bus-util.h"
#include "strv.h"
#include "bus-errors.h"
#include "logind.h"
#include "logind-seat.h"
static int property_get_active_session(
sd_bus *bus,
const char *path,
const char *interface,
const char *property,
sd_bus_message *reply,
sd_bus_error *error,
void *userdata) {
_cleanup_free_ char *p = NULL;
Seat *s = userdata;
assert(bus);
assert(reply);
assert(s);
p = s->active ? session_bus_path(s->active) : strdup("/");
if (!p)
return -ENOMEM;
return sd_bus_message_append(reply, "(so)", s->active ? s->active->id : "", p);
}
static int property_get_can_multi_session(
sd_bus *bus,
const char *path,
const char *interface,
const char *property,
sd_bus_message *reply,
sd_bus_error *error,
void *userdata) {
Seat *s = userdata;
assert(bus);
assert(reply);
assert(s);
return sd_bus_message_append(reply, "b", seat_can_multi_session(s));
}
static int property_get_can_tty(
sd_bus *bus,
const char *path,
const char *interface,
const char *property,
sd_bus_message *reply,
sd_bus_error *error,
void *userdata) {
Seat *s = userdata;
assert(bus);
assert(reply);
assert(s);
return sd_bus_message_append(reply, "b", seat_can_tty(s));
}
static int property_get_can_graphical(
sd_bus *bus,
const char *path,
const char *interface,
const char *property,
sd_bus_message *reply,
sd_bus_error *error,
void *userdata) {
Seat *s = userdata;
assert(bus);
assert(reply);
assert(s);
return sd_bus_message_append(reply, "b", seat_can_tty(s));
}
static int property_get_sessions(
sd_bus *bus,
const char *path,
const char *interface,
const char *property,
sd_bus_message *reply,
sd_bus_error *error,
void *userdata) {
Seat *s = userdata;
Session *session;
int r;
assert(bus);
assert(reply);
assert(s);
r = sd_bus_message_open_container(reply, 'a', "(so)");
if (r < 0)
return r;
LIST_FOREACH(sessions_by_seat, session, s->sessions) {
_cleanup_free_ char *p = NULL;
p = session_bus_path(session);
if (!p)
return -ENOMEM;
r = sd_bus_message_append(reply, "(so)", session->id, p);
if (r < 0)
return r;
}
r = sd_bus_message_close_container(reply);
if (r < 0)
return r;
return 1;
}
static int property_get_idle_hint(
sd_bus *bus,
const char *path,
const char *interface,
const char *property,
sd_bus_message *reply,
sd_bus_error *error,
void *userdata) {
Seat *s = userdata;
assert(bus);
assert(reply);
assert(s);
return sd_bus_message_append(reply, "b", seat_get_idle_hint(s, NULL) > 0);
}
static int property_get_idle_since_hint(
sd_bus *bus,
const char *path,
const char *interface,
const char *property,
sd_bus_message *reply,
sd_bus_error *error,
void *userdata) {
Seat *s = userdata;
dual_timestamp t;
uint64_t u;
int r;
assert(bus);
assert(reply);
assert(s);
r = seat_get_idle_hint(s, &t);
if (r < 0)
return r;
u = streq(property, "IdleSinceHint") ? t.realtime : t.monotonic;
return sd_bus_message_append(reply, "t", u);
}
static int method_terminate(sd_bus *bus, sd_bus_message *message, void *userdata) {
Seat *s = userdata;
int r;
assert(bus);
assert(message);
assert(s);
r = seat_stop_sessions(s);
if (r < 0)
return sd_bus_reply_method_errno(bus, message, r, NULL);
return sd_bus_reply_method_return(bus, message, NULL);
}
static int method_activate_session(sd_bus *bus, sd_bus_message *message, void *userdata) {
Seat *s = userdata;
const char *name;
Session *session;
int r;
assert(bus);
assert(message);
assert(s);
r = sd_bus_message_read(message, "s", &name);
if (r < 0)
return sd_bus_reply_method_errno(bus, message, r, NULL);
session = hashmap_get(s->manager->sessions, name);
if (!session)
return sd_bus_reply_method_errorf(bus, message, BUS_ERROR_NO_SUCH_SESSION, "No session '%s' known", name);
if (session->seat != s)
return sd_bus_reply_method_errorf(bus, message, BUS_ERROR_SESSION_NOT_ON_SEAT, "Session %s not on seat %s", name, s->id);
r = session_activate(session);
if (r < 0)
return sd_bus_reply_method_errno(bus, message, r, NULL);
return sd_bus_reply_method_return(bus, message, NULL);
}
const sd_bus_vtable seat_vtable[] = {
SD_BUS_VTABLE_START(0),
SD_BUS_PROPERTY("Id", "s", NULL, offsetof(Seat, id), 0),
SD_BUS_PROPERTY("ActiveSession", "(so)", property_get_active_session, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
SD_BUS_PROPERTY("CanMultiSession", "b", property_get_can_multi_session, 0, 0),
SD_BUS_PROPERTY("CanTTY", "b", property_get_can_tty, 0, 0),
SD_BUS_PROPERTY("CanGraphical", "b", property_get_can_graphical, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
SD_BUS_PROPERTY("Sessions", "a(so)", property_get_sessions, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
SD_BUS_PROPERTY("IdleHint", "b", property_get_idle_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
SD_BUS_PROPERTY("IdleSinceHint", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
SD_BUS_PROPERTY("IdleSinceHintMonotonic", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
SD_BUS_METHOD("Terminate", NULL, NULL, method_terminate, 0),
SD_BUS_METHOD("ActivateSession", "s", NULL, method_activate_session, 0),
SD_BUS_VTABLE_END
};
int seat_object_find(sd_bus *bus, const char *path, const char *interface, void **found, void *userdata) {
Manager *m = userdata;
Seat *seat;
int r;
assert(bus);
assert(path);
assert(interface);
assert(found);
assert(m);
if (streq(path, "/org/freedesktop/login1/seat/self")) {
sd_bus_message *message;
Session *session;
pid_t pid;
message = sd_bus_get_current(bus);
if (!message)
return 0;
r = sd_bus_get_owner_pid(bus, sd_bus_message_get_sender(message), &pid);
if (r < 0)
return 0;
r = manager_get_session_by_pid(m, pid, &session);
if (r <= 0)
return 0;
if (!session->seat)
return 0;
seat = session->seat;
} else {
_cleanup_free_ char *e = NULL;
const char *p;
p = startswith(path, "/org/freedesktop/login1/seat/");
if (!p)
return 0;
e = sd_bus_label_unescape(p);
if (!e)
return -ENOMEM;
seat = hashmap_get(m->seats, e);
if (!seat)
return 0;
}
*found = seat;
return 1;
}
char *seat_bus_path(Seat *s) {
_cleanup_free_ char *t = NULL;
assert(s);
t = sd_bus_label_escape(s->id);
if (!t)
return NULL;
return strappend("/org/freedesktop/login1/seat/", t);
}
int seat_node_enumerator(sd_bus *bus, const char *path, char ***nodes, void *userdata) {
_cleanup_strv_free_ char **l = NULL;
Manager *m = userdata;
Seat *seat;
Iterator i;
int r;
assert(bus);
assert(path);
assert(nodes);
HASHMAP_FOREACH(seat, m->seats, i) {
char *p;
p = seat_bus_path(seat);
if (!p)
return -ENOMEM;
r = strv_push(&l, p);
if (r < 0) {
free(p);
return r;
}
}
*nodes = l;
l = NULL;
return 1;
}
int seat_send_signal(Seat *s, bool new_seat) {
_cleanup_free_ char *p = NULL;
assert(s);
p = seat_bus_path(s);
if (!p)
return -ENOMEM;
return sd_bus_emit_signal(
s->manager->bus,
"/org/freedesktop/login1",
"org.freedesktop.login1.Manager",
new_seat ? "SeatNew" : "SeatRemoved",
"so", s->id, p);
}
int seat_send_changed(Seat *s, const char *properties, ...) {
_cleanup_free_ char *p = NULL;
char **l;
assert(s);
if (!s->started)
return 0;
p = seat_bus_path(s);
if (!p)
return -ENOMEM;
l = strv_from_stdarg_alloca(properties);
return sd_bus_emit_properties_changed_strv(s->manager->bus, p, "org.freedesktop.login1.Seat", l);
}