/*-*- Mode: C; c-basic-offset: 8 -*-*/
/***
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 General Public License as published by
the Free Software Foundation; either version 2 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
General Public License for more details.
You should have received a copy of the GNU General Public License
along with systemd; If not, see .
***/
#include
#include "dbus.h"
#include "log.h"
#include "dbus-manager.h"
#include "strv.h"
#include "bus-errors.h"
#define BUS_MANAGER_INTERFACE \
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#define INTROSPECTION_BEGIN \
DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE \
"\n" \
BUS_MANAGER_INTERFACE \
BUS_PROPERTIES_INTERFACE \
BUS_INTROSPECTABLE_INTERFACE
#define INTROSPECTION_END \
"\n"
const char bus_manager_interface[] = BUS_MANAGER_INTERFACE;
static DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_manager_append_running_as, manager_running_as, ManagerRunningAs);
static int bus_manager_append_log_target(Manager *m, DBusMessageIter *i, const char *property, void *data) {
const char *t;
assert(m);
assert(i);
assert(property);
t = log_target_to_string(log_get_target());
if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t))
return -ENOMEM;
return 0;
}
static int bus_manager_append_log_level(Manager *m, DBusMessageIter *i, const char *property, void *data) {
const char *t;
assert(m);
assert(i);
assert(property);
t = log_level_to_string(log_get_max_level());
if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t))
return -ENOMEM;
return 0;
}
static int bus_manager_append_n_names(Manager *m, DBusMessageIter *i, const char *property, void *data) {
uint32_t u;
assert(m);
assert(i);
assert(property);
u = hashmap_size(m->units);
if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT32, &u))
return -ENOMEM;
return 0;
}
static int bus_manager_append_n_jobs(Manager *m, DBusMessageIter *i, const char *property, void *data) {
uint32_t u;
assert(m);
assert(i);
assert(property);
u = hashmap_size(m->jobs);
if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT32, &u))
return -ENOMEM;
return 0;
}
static const char *message_get_sender_with_fallback(DBusMessage *m) {
const char *s;
assert(m);
if ((s = dbus_message_get_sender(m)))
return s;
/* When the message came in from a direct connection the
* message will have no sender. We fix that here. */
return ":no-sender";
}
static DBusHandlerResult bus_manager_message_handler(DBusConnection *connection, DBusMessage *message, void *data) {
Manager *m = data;
const BusProperty properties[] = {
{ "org.freedesktop.systemd1.Manager", "Version", bus_property_append_string, "s", PACKAGE_STRING },
{ "org.freedesktop.systemd1.Manager", "RunningAs", bus_manager_append_running_as, "s", &m->running_as },
{ "org.freedesktop.systemd1.Manager", "StartupTimestamp", bus_property_append_uint64, "t", &m->startup_timestamp.realtime },
{ "org.freedesktop.systemd1.Manager", "LogLevel", bus_manager_append_log_level, "s", NULL },
{ "org.freedesktop.systemd1.Manager", "LogTarget", bus_manager_append_log_target, "s", NULL },
{ "org.freedesktop.systemd1.Manager", "NNames", bus_manager_append_n_names, "u", NULL },
{ "org.freedesktop.systemd1.Manager", "NJobs", bus_manager_append_n_jobs, "u", NULL },
{ "org.freedesktop.systemd1.Manager", "Environment", bus_property_append_strv, "as", m->environment },
{ "org.freedesktop.systemd1.Manager", "ConfirmSpawn", bus_property_append_bool, "b", &m->confirm_spawn },
{ "org.freedesktop.systemd1.Manager", "ShowStatus", bus_property_append_bool, "b", &m->show_status },
{ "org.freedesktop.systemd1.Manager", "UnitPath", bus_property_append_strv, "as", m->lookup_paths.unit_path },
{ "org.freedesktop.systemd1.Manager", "SysVInitPath", bus_property_append_strv, "as", m->lookup_paths.sysvinit_path },
{ "org.freedesktop.systemd1.Manager", "SysVRcndPath", bus_property_append_strv, "as", m->lookup_paths.sysvrcnd_path },
{ "org.freedesktop.systemd1.Manager", "NotifySocket", bus_property_append_string, "s", m->notify_socket },
{ "org.freedesktop.systemd1.Manager", "ControlGroupHierarchy", bus_property_append_string, "s", m->cgroup_hierarchy },
{ NULL, NULL, NULL, NULL, NULL }
};
int r;
DBusError error;
DBusMessage *reply = NULL;
char * path = NULL;
JobType job_type = _JOB_TYPE_INVALID;
bool reload_if_possible = false;
assert(connection);
assert(message);
assert(m);
dbus_error_init(&error);
if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "GetUnit")) {
const char *name;
Unit *u;
if (!dbus_message_get_args(
message,
&error,
DBUS_TYPE_STRING, &name,
DBUS_TYPE_INVALID))
return bus_send_error_reply(m, connection, message, &error, -EINVAL);
if (!(u = manager_get_unit(m, name))) {
dbus_set_error(&error, BUS_ERROR_NO_SUCH_UNIT, "Unit %s is not loaded.", name);
return bus_send_error_reply(m, connection, message, &error, -ENOENT);
}
if (!(reply = dbus_message_new_method_return(message)))
goto oom;
if (!(path = unit_dbus_path(u)))
goto oom;
if (!dbus_message_append_args(
reply,
DBUS_TYPE_OBJECT_PATH, &path,
DBUS_TYPE_INVALID))
goto oom;
} else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "LoadUnit")) {
const char *name;
Unit *u;
if (!dbus_message_get_args(
message,
&error,
DBUS_TYPE_STRING, &name,
DBUS_TYPE_INVALID))
return bus_send_error_reply(m, connection, message, &error, -EINVAL);
if ((r = manager_load_unit(m, name, NULL, &error, &u)) < 0)
return bus_send_error_reply(m, connection, message, &error, r);
if (!(reply = dbus_message_new_method_return(message)))
goto oom;
if (!(path = unit_dbus_path(u)))
goto oom;
if (!dbus_message_append_args(
reply,
DBUS_TYPE_OBJECT_PATH, &path,
DBUS_TYPE_INVALID))
goto oom;
} else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "StartUnit"))
job_type = JOB_START;
else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "StopUnit"))
job_type = JOB_STOP;
else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ReloadUnit"))
job_type = JOB_RELOAD;
else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "RestartUnit"))
job_type = JOB_RESTART;
else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "TryRestartUnit"))
job_type = JOB_TRY_RESTART;
else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ReloadOrRestartUnit")) {
reload_if_possible = true;
job_type = JOB_RESTART;
} else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ReloadOrTryRestartUnit")) {
reload_if_possible = true;
job_type = JOB_TRY_RESTART;
} else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "GetJob")) {
uint32_t id;
Job *j;
if (!dbus_message_get_args(
message,
&error,
DBUS_TYPE_UINT32, &id,
DBUS_TYPE_INVALID))
return bus_send_error_reply(m, connection, message, &error, -EINVAL);
if (!(j = manager_get_job(m, id))) {
dbus_set_error(&error, BUS_ERROR_NO_SUCH_JOB, "Job %u does not exist.", (unsigned) id);
return bus_send_error_reply(m, connection, message, &error, -ENOENT);
}
if (!(reply = dbus_message_new_method_return(message)))
goto oom;
if (!(path = job_dbus_path(j)))
goto oom;
if (!dbus_message_append_args(
reply,
DBUS_TYPE_OBJECT_PATH, &path,
DBUS_TYPE_INVALID))
goto oom;
} else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ClearJobs")) {
manager_clear_jobs(m);
if (!(reply = dbus_message_new_method_return(message)))
goto oom;
} else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ResetMaintenance")) {
manager_reset_maintenance(m);
if (!(reply = dbus_message_new_method_return(message)))
goto oom;
} else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ResetMaintenanceUnit")) {
const char *name;
Unit *u;
if (!dbus_message_get_args(
message,
&error,
DBUS_TYPE_STRING, &name,
DBUS_TYPE_INVALID))
return bus_send_error_reply(m, connection, message, &error, -EINVAL);
if (!(u = manager_get_unit(m, name))) {
dbus_set_error(&error, BUS_ERROR_NO_SUCH_UNIT, "Unit %s is not loaded.", name);
return bus_send_error_reply(m, connection, message, &error, -ENOENT);
}
unit_reset_maintenance(u);
if (!(reply = dbus_message_new_method_return(message)))
goto oom;
} else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ListUnits")) {
DBusMessageIter iter, sub;
Iterator i;
Unit *u;
const char *k;
if (!(reply = dbus_message_new_method_return(message)))
goto oom;
dbus_message_iter_init_append(reply, &iter);
if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(ssssssouso)", &sub))
goto oom;
HASHMAP_FOREACH_KEY(u, k, m->units, i) {
char *u_path, *j_path;
const char *description, *load_state, *active_state, *sub_state, *sjob_type, *following;
DBusMessageIter sub2;
uint32_t job_id;
if (k != u->meta.id)
continue;
if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2))
goto oom;
description = unit_description(u);
load_state = unit_load_state_to_string(u->meta.load_state);
active_state = unit_active_state_to_string(unit_active_state(u));
sub_state = unit_sub_state_to_string(u);
following = u->meta.following ? u->meta.following->meta.id : "";
if (!(u_path = unit_dbus_path(u)))
goto oom;
if (u->meta.job) {
job_id = (uint32_t) u->meta.job->id;
if (!(j_path = job_dbus_path(u->meta.job))) {
free(u_path);
goto oom;
}
sjob_type = job_type_to_string(u->meta.job->type);
} else {
job_id = 0;
j_path = u_path;
sjob_type = "";
}
if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &u->meta.id) ||
!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &description) ||
!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &load_state) ||
!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &active_state) ||
!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &sub_state) ||
!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &following) ||
!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &u_path) ||
!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT32, &job_id) ||
!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &sjob_type) ||
!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &j_path)) {
free(u_path);
if (u->meta.job)
free(j_path);
goto oom;
}
free(u_path);
if (u->meta.job)
free(j_path);
if (!dbus_message_iter_close_container(&sub, &sub2))
goto oom;
}
if (!dbus_message_iter_close_container(&iter, &sub))
goto oom;
} else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ListJobs")) {
DBusMessageIter iter, sub;
Iterator i;
Job *j;
if (!(reply = dbus_message_new_method_return(message)))
goto oom;
dbus_message_iter_init_append(reply, &iter);
if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(usssoo)", &sub))
goto oom;
HASHMAP_FOREACH(j, m->jobs, i) {
char *u_path, *j_path;
const char *state, *type;
uint32_t id;
DBusMessageIter sub2;
if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2))
goto oom;
id = (uint32_t) j->id;
state = job_state_to_string(j->state);
type = job_type_to_string(j->type);
if (!(j_path = job_dbus_path(j)))
goto oom;
if (!(u_path = unit_dbus_path(j->unit))) {
free(j_path);
goto oom;
}
if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT32, &id) ||
!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &j->unit->meta.id) ||
!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &type) ||
!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &state) ||
!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &j_path) ||
!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &u_path)) {
free(j_path);
free(u_path);
goto oom;
}
free(j_path);
free(u_path);
if (!dbus_message_iter_close_container(&sub, &sub2))
goto oom;
}
if (!dbus_message_iter_close_container(&iter, &sub))
goto oom;
} else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Subscribe")) {
char *client;
Set *s;
if (!(s = BUS_CONNECTION_SUBSCRIBED(m, connection))) {
if (!(s = set_new(string_hash_func, string_compare_func)))
goto oom;
if (!(dbus_connection_set_data(connection, m->subscribed_data_slot, s, NULL))) {
set_free(s);
goto oom;
}
}
if (!(client = strdup(message_get_sender_with_fallback(message))))
goto oom;
if ((r = set_put(s, client)) < 0) {
free(client);
return bus_send_error_reply(m, connection, message, NULL, r);
}
if (!(reply = dbus_message_new_method_return(message)))
goto oom;
} else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Unsubscribe")) {
char *client;
if (!(client = set_remove(BUS_CONNECTION_SUBSCRIBED(m, connection), (char*) message_get_sender_with_fallback(message)))) {
dbus_set_error(&error, BUS_ERROR_NOT_SUBSCRIBED, "Client is not subscribed.");
return bus_send_error_reply(m, connection, message, &error, -ENOENT);
}
free(client);
if (!(reply = dbus_message_new_method_return(message)))
goto oom;
} else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Dump")) {
FILE *f;
char *dump = NULL;
size_t size;
if (!(reply = dbus_message_new_method_return(message)))
goto oom;
if (!(f = open_memstream(&dump, &size)))
goto oom;
manager_dump_units(m, f, NULL);
manager_dump_jobs(m, f, NULL);
if (ferror(f)) {
fclose(f);
free(dump);
goto oom;
}
fclose(f);
if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &dump, DBUS_TYPE_INVALID)) {
free(dump);
goto oom;
}
free(dump);
} else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "CreateSnapshot")) {
const char *name;
dbus_bool_t cleanup;
Snapshot *s;
if (!dbus_message_get_args(
message,
&error,
DBUS_TYPE_STRING, &name,
DBUS_TYPE_BOOLEAN, &cleanup,
DBUS_TYPE_INVALID))
return bus_send_error_reply(m, connection, message, &error, -EINVAL);
if (name && name[0] == 0)
name = NULL;
if ((r = snapshot_create(m, name, cleanup, &error, &s)) < 0)
return bus_send_error_reply(m, connection, message, &error, r);
if (!(reply = dbus_message_new_method_return(message)))
goto oom;
if (!(path = unit_dbus_path(UNIT(s))))
goto oom;
if (!dbus_message_append_args(
reply,
DBUS_TYPE_OBJECT_PATH, &path,
DBUS_TYPE_INVALID))
goto oom;
} else if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Introspectable", "Introspect")) {
char *introspection = NULL;
FILE *f;
Iterator i;
Unit *u;
Job *j;
const char *k;
size_t size;
if (!(reply = dbus_message_new_method_return(message)))
goto oom;
/* We roll our own introspection code here, instead of
* relying on bus_default_message_handler() because we
* need to generate our introspection string
* dynamically. */
if (!(f = open_memstream(&introspection, &size)))
goto oom;
fputs(INTROSPECTION_BEGIN, f);
HASHMAP_FOREACH_KEY(u, k, m->units, i) {
char *p;
if (k != u->meta.id)
continue;
if (!(p = bus_path_escape(k))) {
fclose(f);
free(introspection);
goto oom;
}
fprintf(f, "", p);
free(p);
}
HASHMAP_FOREACH(j, m->jobs, i)
fprintf(f, "", (unsigned long) j->id);
fputs(INTROSPECTION_END, f);
if (ferror(f)) {
fclose(f);
free(introspection);
goto oom;
}
fclose(f);
if (!introspection)
goto oom;
if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &introspection, DBUS_TYPE_INVALID)) {
free(introspection);
goto oom;
}
free(introspection);
} else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Reload")) {
assert(!m->queued_message);
/* Instead of sending the reply back right away, we
* just remember that we need to and then send it
* after the reload is finished. That way the caller
* knows when the reload finished. */
if (!(m->queued_message = dbus_message_new_method_return(message)))
goto oom;
m->queued_message_connection = connection;
m->exit_code = MANAGER_RELOAD;
} else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Reexecute")) {
if (!(reply = dbus_message_new_method_return(message)))
goto oom;
m->exit_code = MANAGER_REEXECUTE;
} else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Exit")) {
if (m->running_as == MANAGER_SYSTEM) {
dbus_set_error(&error, BUS_ERROR_NOT_SUPPORTED, "Exit is only supported for session managers.");
return bus_send_error_reply(m, connection, message, &error, -ENOTSUP);
}
if (!(reply = dbus_message_new_method_return(message)))
goto oom;
m->exit_code = MANAGER_EXIT;
} else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "SetEnvironment")) {
char **l = NULL, **e = NULL;
if ((r = bus_parse_strv(message, &l)) < 0) {
if (r == -ENOMEM)
goto oom;
return bus_send_error_reply(m, connection, message, NULL, r);
}
e = strv_env_merge(2, m->environment, l);
strv_free(l);
if (!e)
goto oom;
if (!(reply = dbus_message_new_method_return(message))) {
strv_free(e);
goto oom;
}
strv_free(m->environment);
m->environment = e;
} else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "UnsetEnvironment")) {
char **l = NULL, **e = NULL;
if ((r = bus_parse_strv(message, &l)) < 0) {
if (r == -ENOMEM)
goto oom;
return bus_send_error_reply(m, connection, message, NULL, r);
}
e = strv_env_delete(m->environment, 1, l);
strv_free(l);
if (!e)
goto oom;
if (!(reply = dbus_message_new_method_return(message)))
goto oom;
strv_free(m->environment);
m->environment = e;
} else
return bus_default_message_handler(m, connection, message, NULL, properties);
if (job_type != _JOB_TYPE_INVALID) {
const char *name, *smode;
JobMode mode;
Job *j;
Unit *u;
if (!dbus_message_get_args(
message,
&error,
DBUS_TYPE_STRING, &name,
DBUS_TYPE_STRING, &smode,
DBUS_TYPE_INVALID))
return bus_send_error_reply(m, connection, message, &error, -EINVAL);
if ((mode = job_mode_from_string(smode)) == _JOB_MODE_INVALID) {
dbus_set_error(&error, BUS_ERROR_INVALID_JOB_MODE, "Job mode %s is invalid.", smode);
return bus_send_error_reply(m, connection, message, &error, -EINVAL);
}
if ((r = manager_load_unit(m, name, NULL, &error, &u)) < 0)
return bus_send_error_reply(m, connection, message, &error, r);
if (reload_if_possible && unit_can_reload(u)) {
if (job_type == JOB_RESTART)
job_type = JOB_RELOAD_OR_START;
else if (job_type == JOB_TRY_RESTART)
job_type = JOB_RELOAD;
}
if (job_type == JOB_START && u->meta.only_by_dependency) {
dbus_set_error(&error, BUS_ERROR_ONLY_BY_DEPENDENCY, "Unit may be activated by dependency only.");
return bus_send_error_reply(m, connection, message, &error, -EPERM);
}
if ((r = manager_add_job(m, job_type, u, mode, true, &error, &j)) < 0)
return bus_send_error_reply(m, connection, message, &error, r);
if (!(j->bus_client = strdup(message_get_sender_with_fallback(message))))
goto oom;
j->bus = connection;
if (!(reply = dbus_message_new_method_return(message)))
goto oom;
if (!(path = job_dbus_path(j)))
goto oom;
if (!dbus_message_append_args(
reply,
DBUS_TYPE_OBJECT_PATH, &path,
DBUS_TYPE_INVALID))
goto oom;
}
free(path);
if (reply) {
if (!dbus_connection_send(connection, reply, NULL))
goto oom;
dbus_message_unref(reply);
}
return DBUS_HANDLER_RESULT_HANDLED;
oom:
free(path);
if (reply)
dbus_message_unref(reply);
dbus_error_free(&error);
return DBUS_HANDLER_RESULT_NEED_MEMORY;
}
const DBusObjectPathVTable bus_manager_vtable = {
.message_function = bus_manager_message_handler
};