5b12334d35
This way we can unify handling of credentials that are attached to messages, or can be queried for bus name owners or connection peers. This also adds the ability to extend incomplete credential information with data from /proc, Also, provide a convenience call that will automatically determine the most appropriate credential object for an incoming message, by using the the attached information if possible, the sending name information if available and otherwise the peer's credentials.
392 lines
11 KiB
C
392 lines
11 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 "util.h"
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#include "bus-util.h"
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#include "strv.h"
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#include "bus-errors.h"
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#include "logind.h"
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#include "logind-seat.h"
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static int property_get_active_session(
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sd_bus *bus,
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const char *path,
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const char *interface,
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const char *property,
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sd_bus_message *reply,
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void *userdata,
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sd_bus_error *error) {
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_cleanup_free_ char *p = NULL;
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Seat *s = userdata;
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assert(bus);
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assert(reply);
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assert(s);
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p = s->active ? session_bus_path(s->active) : strdup("/");
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if (!p)
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return -ENOMEM;
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return sd_bus_message_append(reply, "(so)", s->active ? s->active->id : "", p);
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}
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static int property_get_can_multi_session(
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sd_bus *bus,
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const char *path,
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const char *interface,
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const char *property,
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sd_bus_message *reply,
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void *userdata,
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sd_bus_error *error) {
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Seat *s = userdata;
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assert(bus);
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assert(reply);
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assert(s);
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return sd_bus_message_append(reply, "b", seat_can_multi_session(s));
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}
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static int property_get_can_tty(
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sd_bus *bus,
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const char *path,
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const char *interface,
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const char *property,
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sd_bus_message *reply,
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void *userdata,
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sd_bus_error *error) {
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Seat *s = userdata;
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assert(bus);
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assert(reply);
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assert(s);
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return sd_bus_message_append(reply, "b", seat_can_tty(s));
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}
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static int property_get_can_graphical(
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sd_bus *bus,
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const char *path,
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const char *interface,
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const char *property,
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sd_bus_message *reply,
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void *userdata,
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sd_bus_error *error) {
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Seat *s = userdata;
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assert(bus);
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assert(reply);
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assert(s);
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return sd_bus_message_append(reply, "b", seat_can_tty(s));
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}
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static int property_get_sessions(
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sd_bus *bus,
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const char *path,
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const char *interface,
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const char *property,
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sd_bus_message *reply,
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void *userdata,
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sd_bus_error *error) {
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Seat *s = userdata;
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Session *session;
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int r;
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assert(bus);
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assert(reply);
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assert(s);
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r = sd_bus_message_open_container(reply, 'a', "(so)");
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if (r < 0)
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return r;
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LIST_FOREACH(sessions_by_seat, session, s->sessions) {
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_cleanup_free_ char *p = NULL;
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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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r = sd_bus_message_append(reply, "(so)", session->id, p);
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if (r < 0)
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return r;
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}
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r = sd_bus_message_close_container(reply);
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if (r < 0)
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return r;
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return 1;
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}
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static int property_get_idle_hint(
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sd_bus *bus,
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const char *path,
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const char *interface,
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const char *property,
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sd_bus_message *reply,
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void *userdata,
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sd_bus_error *error) {
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Seat *s = userdata;
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assert(bus);
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assert(reply);
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assert(s);
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return sd_bus_message_append(reply, "b", seat_get_idle_hint(s, NULL) > 0);
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}
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static int property_get_idle_since_hint(
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sd_bus *bus,
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const char *path,
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const char *interface,
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const char *property,
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sd_bus_message *reply,
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void *userdata,
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sd_bus_error *error) {
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Seat *s = userdata;
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dual_timestamp t;
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uint64_t u;
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int r;
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assert(bus);
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assert(reply);
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assert(s);
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r = seat_get_idle_hint(s, &t);
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if (r < 0)
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return r;
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u = streq(property, "IdleSinceHint") ? t.realtime : t.monotonic;
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return sd_bus_message_append(reply, "t", u);
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}
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static int method_terminate(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
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Seat *s = userdata;
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int r;
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assert(bus);
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assert(message);
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assert(s);
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r = seat_stop_sessions(s);
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if (r < 0)
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return r;
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return sd_bus_reply_method_return(message, NULL);
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}
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static int method_activate_session(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
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Seat *s = userdata;
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const char *name;
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Session *session;
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int r;
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assert(bus);
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assert(message);
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assert(s);
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r = sd_bus_message_read(message, "s", &name);
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if (r < 0)
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return r;
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session = hashmap_get(s->manager->sessions, name);
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if (!session)
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return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SESSION, "No session '%s' known", name);
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if (session->seat != s)
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return sd_bus_error_setf(error, BUS_ERROR_SESSION_NOT_ON_SEAT, "Session %s not on seat %s", name, s->id);
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r = session_activate(session);
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if (r < 0)
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return r;
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return sd_bus_reply_method_return(message, NULL);
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}
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const sd_bus_vtable seat_vtable[] = {
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SD_BUS_VTABLE_START(0),
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SD_BUS_PROPERTY("Id", "s", NULL, offsetof(Seat, id), 0),
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SD_BUS_PROPERTY("ActiveSession", "(so)", property_get_active_session, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
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SD_BUS_PROPERTY("CanMultiSession", "b", property_get_can_multi_session, 0, 0),
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SD_BUS_PROPERTY("CanTTY", "b", property_get_can_tty, 0, 0),
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SD_BUS_PROPERTY("CanGraphical", "b", property_get_can_graphical, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
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SD_BUS_PROPERTY("Sessions", "a(so)", property_get_sessions, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
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SD_BUS_PROPERTY("IdleHint", "b", property_get_idle_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
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SD_BUS_PROPERTY("IdleSinceHint", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
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SD_BUS_PROPERTY("IdleSinceHintMonotonic", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
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SD_BUS_METHOD("Terminate", NULL, NULL, method_terminate, 0),
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SD_BUS_METHOD("ActivateSession", "s", NULL, method_activate_session, 0),
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SD_BUS_VTABLE_END
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};
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int seat_object_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error) {
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Manager *m = userdata;
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Seat *seat;
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int r;
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assert(bus);
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assert(path);
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assert(interface);
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assert(found);
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assert(m);
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if (streq(path, "/org/freedesktop/login1/seat/self")) {
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_cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
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sd_bus_message *message;
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Session *session;
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pid_t pid;
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message = sd_bus_get_current(bus);
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if (!message)
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return 0;
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r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_PID, &creds);
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if (r < 0)
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return r;
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r = sd_bus_creds_get_pid(creds, &pid);
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if (r < 0)
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return r;
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r = manager_get_session_by_pid(m, pid, &session);
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if (r <= 0)
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return 0;
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if (!session->seat)
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return 0;
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seat = session->seat;
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} else {
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_cleanup_free_ char *e = NULL;
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const char *p;
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p = startswith(path, "/org/freedesktop/login1/seat/");
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if (!p)
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return 0;
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e = sd_bus_label_unescape(p);
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if (!e)
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return -ENOMEM;
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seat = hashmap_get(m->seats, e);
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if (!seat)
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return 0;
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}
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*found = seat;
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return 1;
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}
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char *seat_bus_path(Seat *s) {
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_cleanup_free_ char *t = NULL;
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assert(s);
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t = sd_bus_label_escape(s->id);
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if (!t)
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return NULL;
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return strappend("/org/freedesktop/login1/seat/", t);
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}
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int seat_node_enumerator(sd_bus *bus, const char *path, void *userdata, char ***nodes, sd_bus_error *error) {
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_cleanup_strv_free_ char **l = NULL;
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Manager *m = userdata;
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Seat *seat;
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Iterator i;
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int r;
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assert(bus);
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assert(path);
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assert(nodes);
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HASHMAP_FOREACH(seat, m->seats, i) {
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char *p;
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p = seat_bus_path(seat);
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if (!p)
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return -ENOMEM;
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r = strv_push(&l, p);
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if (r < 0) {
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free(p);
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return r;
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}
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}
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*nodes = l;
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l = NULL;
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return 1;
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}
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int seat_send_signal(Seat *s, bool new_seat) {
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_cleanup_free_ char *p = NULL;
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assert(s);
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p = seat_bus_path(s);
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if (!p)
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return -ENOMEM;
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return sd_bus_emit_signal(
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s->manager->bus,
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"/org/freedesktop/login1",
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"org.freedesktop.login1.Manager",
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new_seat ? "SeatNew" : "SeatRemoved",
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"so", s->id, p);
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}
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int seat_send_changed(Seat *s, const char *properties, ...) {
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_cleanup_free_ char *p = NULL;
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char **l;
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assert(s);
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if (!s->started)
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return 0;
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p = seat_bus_path(s);
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if (!p)
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return -ENOMEM;
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l = strv_from_stdarg_alloca(properties);
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return sd_bus_emit_properties_changed_strv(s->manager->bus, p, "org.freedesktop.login1.Seat", l);
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}
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