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-rw-r--r--src/libcore/dbus-scope.c229
1 files changed, 229 insertions, 0 deletions
diff --git a/src/libcore/dbus-scope.c b/src/libcore/dbus-scope.c
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+++ b/src/libcore/dbus-scope.c
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+/***
+ This file is part of systemd.
+
+ Copyright 2013 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 "alloc-util.h"
+#include "bus-common-errors.h"
+#include "bus-internal.h"
+#include "bus-util.h"
+#include "dbus-cgroup.h"
+#include "dbus-kill.h"
+#include "dbus-scope.h"
+#include "dbus-unit.h"
+#include "dbus.h"
+#include "scope.h"
+#include "selinux-access.h"
+#include "unit.h"
+
+static int bus_scope_abandon(sd_bus_message *message, void *userdata, sd_bus_error *error) {
+ Scope *s = userdata;
+ int r;
+
+ assert(message);
+ assert(s);
+
+ r = mac_selinux_unit_access_check(UNIT(s), message, "stop", error);
+ if (r < 0)
+ return r;
+
+ r = bus_verify_manage_units_async(UNIT(s)->manager, message, error);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */
+
+ r = scope_abandon(s);
+ if (r == -ESTALE)
+ return sd_bus_error_setf(error, BUS_ERROR_SCOPE_NOT_RUNNING, "Scope %s is not running, cannot abandon.", UNIT(s)->id);
+ if (r < 0)
+ return r;
+
+ return sd_bus_reply_method_return(message, NULL);
+}
+
+static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_result, scope_result, ScopeResult);
+
+const sd_bus_vtable bus_scope_vtable[] = {
+ SD_BUS_VTABLE_START(0),
+ SD_BUS_PROPERTY("Controller", "s", NULL, offsetof(Scope, controller), SD_BUS_VTABLE_PROPERTY_CONST),
+ SD_BUS_PROPERTY("TimeoutStopUSec", "t", bus_property_get_usec, offsetof(Scope, timeout_stop_usec), SD_BUS_VTABLE_PROPERTY_CONST),
+ SD_BUS_PROPERTY("Result", "s", property_get_result, offsetof(Scope, result), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
+ SD_BUS_SIGNAL("RequestStop", NULL, 0),
+ SD_BUS_METHOD("Abandon", NULL, NULL, bus_scope_abandon, SD_BUS_VTABLE_UNPRIVILEGED),
+ SD_BUS_VTABLE_END
+};
+
+static int bus_scope_set_transient_property(
+ Scope *s,
+ const char *name,
+ sd_bus_message *message,
+ UnitSetPropertiesMode mode,
+ sd_bus_error *error) {
+
+ int r;
+
+ assert(s);
+ assert(name);
+ assert(message);
+
+ if (streq(name, "PIDs")) {
+ unsigned n = 0;
+ uint32_t pid;
+
+ r = sd_bus_message_enter_container(message, 'a', "u");
+ if (r < 0)
+ return r;
+
+ while ((r = sd_bus_message_read(message, "u", &pid)) > 0) {
+
+ if (pid <= 1)
+ return -EINVAL;
+
+ if (mode != UNIT_CHECK) {
+ r = unit_watch_pid(UNIT(s), pid);
+ if (r < 0 && r != -EEXIST)
+ return r;
+ }
+
+ n++;
+ }
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_exit_container(message);
+ if (r < 0)
+ return r;
+
+ if (n <= 0)
+ return -EINVAL;
+
+ return 1;
+
+ } else if (streq(name, "Controller")) {
+ const char *controller;
+ char *c;
+
+ r = sd_bus_message_read(message, "s", &controller);
+ if (r < 0)
+ return r;
+
+ if (!isempty(controller) && !service_name_is_valid(controller))
+ return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Controller '%s' is not a valid bus name.", controller);
+
+ if (mode != UNIT_CHECK) {
+ if (isempty(controller))
+ c = NULL;
+ else {
+ c = strdup(controller);
+ if (!c)
+ return -ENOMEM;
+ }
+
+ free(s->controller);
+ s->controller = c;
+ }
+
+ return 1;
+
+ } else if (streq(name, "TimeoutStopUSec")) {
+
+ if (mode != UNIT_CHECK) {
+ r = sd_bus_message_read(message, "t", &s->timeout_stop_usec);
+ if (r < 0)
+ return r;
+
+ unit_write_drop_in_format(UNIT(s), mode, name, "[Scope]\nTimeoutStopSec="USEC_FMT"us\n", s->timeout_stop_usec);
+ } else {
+ r = sd_bus_message_skip(message, "t");
+ if (r < 0)
+ return r;
+ }
+
+ return 1;
+ }
+
+ return 0;
+}
+
+int bus_scope_set_property(
+ Unit *u,
+ const char *name,
+ sd_bus_message *message,
+ UnitSetPropertiesMode mode,
+ sd_bus_error *error) {
+
+ Scope *s = SCOPE(u);
+ int r;
+
+ assert(s);
+ assert(name);
+ assert(message);
+
+ r = bus_cgroup_set_property(u, &s->cgroup_context, name, message, mode, error);
+ if (r != 0)
+ return r;
+
+ if (u->load_state == UNIT_STUB) {
+ /* While we are created we still accept PIDs */
+
+ r = bus_scope_set_transient_property(s, name, message, mode, error);
+ if (r != 0)
+ return r;
+
+ r = bus_kill_context_set_transient_property(u, &s->kill_context, name, message, mode, error);
+ if (r != 0)
+ return r;
+ }
+
+ return 0;
+}
+
+int bus_scope_commit_properties(Unit *u) {
+ assert(u);
+
+ unit_update_cgroup_members_masks(u);
+ unit_realize_cgroup(u);
+
+ return 0;
+}
+
+int bus_scope_send_request_stop(Scope *s) {
+ _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL;
+ _cleanup_free_ char *p = NULL;
+ int r;
+
+ assert(s);
+
+ if (!s->controller)
+ return 0;
+
+ p = unit_dbus_path(UNIT(s));
+ if (!p)
+ return -ENOMEM;
+
+ r = sd_bus_message_new_signal(
+ UNIT(s)->manager->api_bus,
+ &m,
+ p,
+ "org.freedesktop.systemd1.Scope",
+ "RequestStop");
+ if (r < 0)
+ return r;
+
+ return sd_bus_send_to(UNIT(s)->manager->api_bus, m, /* s->controller */ NULL, NULL);
+}