diff options
Diffstat (limited to 'src/logind-seat-dbus.c')
| -rw-r--r-- | src/logind-seat-dbus.c | 218 |
1 files changed, 218 insertions, 0 deletions
diff --git a/src/logind-seat-dbus.c b/src/logind-seat-dbus.c new file mode 100644 index 0000000000..63b1bd5ed8 --- /dev/null +++ b/src/logind-seat-dbus.c @@ -0,0 +1,218 @@ +/*-*- 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 General Public License as published by + the Free Software Foundation; either version 2 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 + General Public License for more details. + + You should have received a copy of the GNU General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include <errno.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" \ + " <property name=\"Id\" type=\"s\" access=\"read\"/>\n" \ + " <property name=\"Active\" type=\"so\" access=\"read\"/>\n" \ + " <property name=\"Sessions\" type=\"a(so)\" 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 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 DBusHandlerResult seat_message_dispatch( + Seat *s, + DBusConnection *connection, + DBusMessage *message) { + + const BusProperty properties[] = { + { "org.freedesktop.login1.Seat", "Id", bus_property_append_string, "s", s->id }, + { "org.freedesktop.login1.Seat", "Active", bus_seat_append_active, "(so)", s }, + { "org.freedesktop.login1.Seat", "Sessions", bus_seat_append_sessions, "a(so)", s }, + { NULL, NULL, NULL, NULL, NULL } + }; + + assert(s); + assert(connection); + assert(message); + + return bus_default_message_handler(connection, message, INTROSPECTION, INTERFACES_LIST, properties); +} + +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; +} |