dbus-job.c revision ac45dec934b0932d03fbd498a3c6e8e90a01813f
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 2010 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 "log.h"
#include "sd-bus.h"
#include "selinux-access.h"
#include "job.h"
#include "dbus-job.h"
#include "dbus.h"
static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_type, job_type, JobType);
static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_state, job_state, JobState);
static int verify_sys_admin_or_owner_sync(sd_bus_message *message, Job *j, sd_bus_error *error) {
int r;
if (sd_bus_track_contains(j->clients, sd_bus_message_get_sender(message)))
return 0; /* One of the job owners is calling us */
r = sd_bus_query_sender_privilege(message, CAP_SYS_ADMIN);
if (r < 0)
return r;
if (r == 0)
return sd_bus_error_setf(error, SD_BUS_ERROR_ACCESS_DENIED, "Access denied to perform action");
/* Root has called us */
return 0;
}
static int property_get_unit(
sd_bus *bus,
const char *path,
const char *interface,
const char *property,
sd_bus_message *reply,
void *userdata,
sd_bus_error *error) {
_cleanup_free_ char *p = NULL;
Job *j = userdata;
assert(bus);
assert(reply);
assert(j);
p = unit_dbus_path(j->unit);
if (!p)
return -ENOMEM;
return sd_bus_message_append(reply, "(so)", j->unit->id, p);
}
int bus_job_method_cancel(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
Job *j = userdata;
int r;
assert(bus);
assert(message);
assert(j);
r = verify_sys_admin_or_owner_sync(message, j, error);
if (r < 0)
return r;
r = selinux_unit_access_check(j->unit, message, "stop", error);
if (r < 0)
return r;
job_finish_and_invalidate(j, JOB_CANCELED, true);
return sd_bus_reply_method_return(message, NULL);
}
const sd_bus_vtable bus_job_vtable[] = {
SD_BUS_VTABLE_START(0),
SD_BUS_METHOD("Cancel", NULL, NULL, bus_job_method_cancel, SD_BUS_VTABLE_UNPRIVILEGED),
SD_BUS_PROPERTY("Id", "u", NULL, offsetof(Job, id), SD_BUS_VTABLE_PROPERTY_CONST),
SD_BUS_PROPERTY("Unit", "(so)", property_get_unit, 0, SD_BUS_VTABLE_PROPERTY_CONST),
SD_BUS_PROPERTY("JobType", "s", property_get_type, offsetof(Job, type), SD_BUS_VTABLE_PROPERTY_CONST),
SD_BUS_PROPERTY("State", "s", property_get_state, offsetof(Job, state), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
SD_BUS_VTABLE_END
};
static int send_new_signal(sd_bus *bus, void *userdata) {
_cleanup_bus_message_unref_ sd_bus_message *m = NULL;
_cleanup_free_ char *p = NULL;
Job *j = userdata;
int r;
assert(bus);
assert(j);
p = job_dbus_path(j);
if (!p)
return -ENOMEM;
r = sd_bus_message_new_signal(
bus,
&m,
"/org/freedesktop/systemd1",
"org.freedesktop.systemd1.Manager",
"JobNew");
if (r < 0)
return r;
r = sd_bus_message_append(m, "uos", j->id, p, j->unit->id);
if (r < 0)
return r;
return sd_bus_send(bus, m, NULL);
}
static int send_changed_signal(sd_bus *bus, void *userdata) {
_cleanup_free_ char *p = NULL;
Job *j = userdata;
assert(bus);
assert(j);
p = job_dbus_path(j);
if (!p)
return -ENOMEM;
return sd_bus_emit_properties_changed(bus, p, "org.freedesktop.systemd1.Job", "State", NULL);
}
void bus_job_send_change_signal(Job *j) {
int r;
assert(j);
if (j->in_dbus_queue) {
LIST_REMOVE(dbus_queue, j->manager->dbus_job_queue, j);
j->in_dbus_queue = false;
}
r = bus_foreach_bus(j->manager, j->clients, j->sent_dbus_new_signal ? send_changed_signal : send_new_signal, j);
if (r < 0)
log_debug("Failed to send job change signal for %u: %s", j->id, strerror(-r));
j->sent_dbus_new_signal = true;
}
static int send_removed_signal(sd_bus *bus, void *userdata) {
_cleanup_bus_message_unref_ sd_bus_message *m = NULL;
_cleanup_free_ char *p = NULL;
Job *j = userdata;
int r;
assert(bus);
assert(j);
p = job_dbus_path(j);
if (!p)
return -ENOMEM;
r = sd_bus_message_new_signal(
bus,
&m,
"/org/freedesktop/systemd1",
"org.freedesktop.systemd1.Manager",
"JobRemoved");
if (r < 0)
return r;
r = sd_bus_message_append(m, "uoss", j->id, p, j->unit->id, job_result_to_string(j->result));
if (r < 0)
return r;
return sd_bus_send(bus, m, NULL);
}
void bus_job_send_removed_signal(Job *j) {
int r;
assert(j);
if (!j->sent_dbus_new_signal)
bus_job_send_change_signal(j);
r = bus_foreach_bus(j->manager, j->clients, send_removed_signal, j);
if (r < 0)
log_debug("Failed to send job remove signal for %u: %s", j->id, strerror(-r));
}