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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
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 "selinux-access.h"
#include "unit.h"
#include "scope.h"
#include "dbus.h"
#include "bus-util.h"
#include "bus-internal.h"
#include "bus-common-errors.h"
#include "dbus-unit.h"
#include "dbus-cgroup.h"
#include "dbus-kill.h"
#include "dbus-scope.h"
static int bus_scope_abandon(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
Scope *s = userdata;
int r;
assert(bus);
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_bus_message_unref_ 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);
}
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