+/*-*- 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-machine.h"
+#include "dbus-common.h"
+
+#define BUS_MACHINE_INTERFACE \
+ " <interface name=\"org.freedesktop.login1.Machine\">\n" \
+ " <method name=\"Terminate\"/>\n" \
+ " <method name=\"Kill\">\n" \
+ " <arg name=\"who\" type=\"s\"/>\n" \
+ " <arg name=\"signal\" type=\"s\"/>\n" \
+ " </method>\n" \
+ " <property name=\"Name\" type=\"s\" access=\"read\"/>\n" \
+ " <property name=\"Id\" type=\"ay\" 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=\"Service\" type=\"s\" access=\"read\"/>\n" \
+ " <property name=\"Slice\" type=\"s\" access=\"read\"/>\n" \
+ " <property name=\"Leader\" type=\"u\" access=\"read\"/>\n" \
+ " <property name=\"Class\" type=\"s\" access=\"read\"/>\n" \
+ " <property name=\"RootDirectory\" type=\"s\" access=\"read\"/>\n" \
+ " </interface>\n"
+
+#define INTROSPECTION \
+ DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE \
+ "<node>\n" \
+ BUS_MACHINE_INTERFACE \
+ BUS_PROPERTIES_INTERFACE \
+ BUS_PEER_INTERFACE \
+ BUS_INTROSPECTABLE_INTERFACE \
+ "</node>\n"
+
+#define INTERFACES_LIST \
+ BUS_GENERIC_INTERFACES_LIST \
+ "org.freedesktop.login1.Machine\0"
+
+static int bus_machine_append_default_cgroup(DBusMessageIter *i, const char *property, void *data) {
+ _cleanup_free_ char *t = NULL;
+ Machine *m = data;
+ int r;
+ bool success;
+
+ assert(i);
+ assert(property);
+ assert(m);
+
+ r = cg_join_spec(SYSTEMD_CGROUP_CONTROLLER, m->cgroup_path, &t);
+ if (r < 0)
+ return r;
+
+ success = dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t);
+ return success ? 0 : -ENOMEM;
+}
+
+static int bus_machine_append_id(DBusMessageIter *i, const char *property, void *data) {
+ DBusMessageIter sub;
+ Machine *m = data;
+ dbus_bool_t b;
+ void *p;
+
+ assert(i);
+ assert(property);
+ assert(m);
+
+ if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "y", &sub))
+ return -ENOMEM;
+
+ p = &m->id;
+ b = dbus_message_iter_append_fixed_array(&sub, DBUS_TYPE_BYTE, &p, 16);
+ if (!b)
+ return -ENOMEM;
+
+ if (!dbus_message_iter_close_container(i, &sub))
+ return -ENOMEM;
+
+ return 0;
+}
+
+static int get_machine_for_path(Manager *m, const char *path, Machine **_machine) {
+ _cleanup_free_ char *e = NULL;
+ Machine *machine;
+
+ assert(m);
+ assert(path);
+ assert(_machine);
+
+ if (!startswith(path, "/org/freedesktop/login1/machine/"))
+ return -EINVAL;
+
+ e = bus_path_unescape(path + 32);
+ if (!e)
+ return -ENOMEM;
+
+ machine = hashmap_get(m->machines, e);
+ if (!machine)
+ return -ENOENT;
+
+ *_machine = machine;
+ return 0;
+}
+
+static DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_machine_append_class, machine_class, MachineClass);
+
+static const BusProperty bus_login_machine_properties[] = {
+ { "Name", bus_property_append_string, "s", offsetof(Machine, name), true },
+ { "Id", bus_machine_append_id, "ay", 0 },
+ { "Timestamp", bus_property_append_usec, "t", offsetof(Machine, timestamp.realtime) },
+ { "TimestampMonotonic", bus_property_append_usec, "t", offsetof(Machine, timestamp.monotonic) },
+ { "DefaultControlGroup", bus_machine_append_default_cgroup, "s", 0 },
+ { "Service", bus_property_append_string, "s", offsetof(Machine, service), true },
+ { "Slice", bus_property_append_string, "s", offsetof(Machine, slice), true },
+ { "Leader", bus_property_append_pid, "u", offsetof(Session, leader) },
+ { "Class", bus_machine_append_class, "s", offsetof(Machine, class) },
+ { "RootDirectory", bus_property_append_string, "s", offsetof(Machine, root_directory), true },
+ { NULL, }
+};
+
+static DBusHandlerResult machine_message_dispatch(
+ Machine *m,
+ DBusConnection *connection,
+ DBusMessage *message) {
+
+ DBusError error;
+ _cleanup_dbus_message_unref_ DBusMessage *reply = NULL;
+ int r;
+
+ assert(m);
+ assert(connection);
+ assert(message);
+
+ if (dbus_message_is_method_call(message, "org.freedesktop.login1.Machine", "Terminate")) {
+
+ r = machine_stop(m);
+ 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.Machine", "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 = machine_kill(m, 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.Machine", bus_login_machine_properties, m },
+ { 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 machine_message_handler(
+ DBusConnection *connection,
+ DBusMessage *message,
+ void *userdata) {
+
+ Manager *manager = userdata;
+ Machine *m;
+ int r;
+
+ r = get_machine_for_path(manager, dbus_message_get_path(message), &m);
+ 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 machine");
+ return bus_send_error_reply(connection, message, &e, r);
+ }
+
+ return bus_send_error_reply(connection, message, NULL, r);
+ }
+
+ return machine_message_dispatch(m, connection, message);
+}
+
+const DBusObjectPathVTable bus_machine_vtable = {
+ .message_function = machine_message_handler
+};
+
+char *machine_bus_path(Machine *m) {
+ _cleanup_free_ char *e = NULL;
+
+ assert(m);
+
+ e = bus_path_escape(m->name);
+ if (!e)
+ return NULL;
+
+ return strappend("/org/freedesktop/login1/machine/", e);
+}
+
+int machine_send_signal(Machine *m, bool new_machine) {
+ _cleanup_dbus_message_unref_ DBusMessage *msg = NULL;
+ _cleanup_free_ char *p = NULL;
+
+ assert(m);
+
+ msg = dbus_message_new_signal("/org/freedesktop/login1",
+ "org.freedesktop.login1.Manager",
+ new_machine ? "MachineNew" : "MachineRemoved");
+
+ if (!m)
+ return -ENOMEM;
+
+ p = machine_bus_path(m);
+ if (!p)
+ return -ENOMEM;
+
+ if (!dbus_message_append_args(
+ msg,
+ DBUS_TYPE_STRING, &m->name,
+ DBUS_TYPE_OBJECT_PATH, &p,
+ DBUS_TYPE_INVALID))
+ return -ENOMEM;
+
+ if (!dbus_connection_send(m->manager->bus, msg, NULL))
+ return -ENOMEM;
+
+ return 0;
+}
+
+int machine_send_changed(Machine *m, const char *properties) {
+ _cleanup_dbus_message_unref_ DBusMessage *msg = NULL;
+ _cleanup_free_ char *p = NULL;
+
+ assert(m);
+
+ if (!m->started)
+ return 0;
+
+ p = machine_bus_path(m);
+ if (!p)
+ return -ENOMEM;
+
+ msg = bus_properties_changed_new(p, "org.freedesktop.login1.Machine", properties);
+ if (!msg)
+ return -ENOMEM;
+
+ if (!dbus_connection_send(m->manager->bus, msg, NULL))
+ return -ENOMEM;
+
+ return 0;
+}
~ianmdlvl / elogind.git / commitdiff