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-rw-r--r--src/login/logind-session-dbus.c554
1 files changed, 554 insertions, 0 deletions
diff --git a/src/login/logind-session-dbus.c b/src/login/logind-session-dbus.c
new file mode 100644
index 0000000000..ec823af547
--- /dev/null
+++ b/src/login/logind-session-dbus.c
@@ -0,0 +1,554 @@
+/*-*- 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" \
+ " <signal name=\"Lock\"/>\n" \
+ " <signal name=\"Unlock\"/>\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=\"DefaultControlGroup\" 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=\"State\" type=\"s\" 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))
+ return -ENOMEM;
+
+ 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;
+ _cleanup_free_ 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))
+ return -ENOMEM;
+
+ 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;
+ int r;
+
+ assert(i);
+ assert(property);
+ assert(s);
+
+ r = session_get_idle_hint(s, &t);
+ if (r < 0)
+ return r;
+
+ u = streq(property, "IdleSinceHint") ? t.realtime : t.monotonic;
+
+ if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT64, &u))
+ return -ENOMEM;
+
+ return 0;
+}
+
+static int bus_session_append_default_cgroup(DBusMessageIter *i, const char *property, void *data) {
+ Session *s = data;
+ _cleanup_free_ char *t = NULL;
+ int r;
+ bool success;
+
+ assert(i);
+ assert(property);
+ assert(s);
+
+ r = cg_join_spec(SYSTEMD_CGROUP_CONTROLLER, s->cgroup_path, &t);
+ if (r < 0)
+ return r;
+
+ success = dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t);
+ return success ? 0 : -ENOMEM;
+}
+
+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 bus_session_append_state(DBusMessageIter *i, const char *property, void *data) {
+ Session *s = data;
+ const char *state;
+
+ assert(i);
+ assert(property);
+ assert(s);
+
+ state = session_state_to_string(session_get_state(s));
+
+ if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &state))
+ return -ENOMEM;
+
+ return 0;
+}
+
+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) },
+ { "DefaultControlGroup", bus_session_append_default_cgroup, "s", 0, },
+ { "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 },
+ { "State", bus_session_append_state, "s", 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;
+ _cleanup_dbus_message_unref_ 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 (!bus_maybe_send_reply(connection, message, reply))
+ goto oom;
+ }
+
+ return DBUS_HANDLER_RESULT_HANDLED;
+
+oom:
+ 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) {
+ _cleanup_free_ char *t;
+
+ assert(s);
+
+ t = bus_path_escape(s->id);
+ if (!t)
+ return NULL;
+
+ return strappend("/org/freedesktop/login1/session/", t);
+}
+
+int session_send_signal(Session *s, bool new_session) {
+ _cleanup_dbus_message_unref_ DBusMessage *m = NULL;
+ _cleanup_free_ 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)
+ return -ENOMEM;
+
+ if (!dbus_message_append_args(
+ m,
+ DBUS_TYPE_STRING, &s->id,
+ DBUS_TYPE_OBJECT_PATH, &p,
+ DBUS_TYPE_INVALID))
+ return -ENOMEM;
+
+ if (!dbus_connection_send(s->manager->bus, m, NULL))
+ return -ENOMEM;
+
+ return 0;
+}
+
+int session_send_changed(Session *s, const char *properties) {
+ _cleanup_dbus_message_unref_ DBusMessage *m = NULL;
+ _cleanup_free_ 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)
+ return -ENOMEM;
+
+ if (!dbus_connection_send(s->manager->bus, m, NULL))
+ return -ENOMEM;
+
+ return 0;
+}
+
+int session_send_lock(Session *s, bool lock) {
+ _cleanup_dbus_message_unref_ DBusMessage *m = NULL;
+ bool b;
+ _cleanup_free_ char *p = NULL;
+
+ assert(s);
+
+ p = session_bus_path(s);
+ if (!p)
+ return -ENOMEM;
+
+ m = dbus_message_new_signal(p, "org.freedesktop.login1.Session", lock ? "Lock" : "Unlock");
+
+ if (!m)
+ return -ENOMEM;
+
+ b = dbus_connection_send(s->manager->bus, m, NULL);
+ if (!b)
+ return -ENOMEM;
+
+ return 0;
+}
+
+int session_send_lock_all(Manager *m, bool lock) {
+ Session *session;
+ Iterator i;
+ int r = 0;
+
+ assert(m);
+
+ HASHMAP_FOREACH(session, m->sessions, i) {
+ int k;
+
+ k = session_send_lock(session, lock);
+ if (k < 0)
+ r = k;
+ }
+
+ return r;
+}