21b735e798
Let's add a way to get the type-specific D-Bus interface of a unit from either its type or name to src/basic/unit-name.[ch]. That way we can share it with the client side, where it is useful in tools like cgls or machinectl. Also ports over machinectl to make use of this.
235 lines
6.2 KiB
C
235 lines
6.2 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2010 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include "unit.h"
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#include "target.h"
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#include "log.h"
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#include "dbus-target.h"
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#include "special.h"
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#include "unit-name.h"
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static const UnitActiveState state_translation_table[_TARGET_STATE_MAX] = {
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[TARGET_DEAD] = UNIT_INACTIVE,
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[TARGET_ACTIVE] = UNIT_ACTIVE
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};
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static void target_set_state(Target *t, TargetState state) {
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TargetState old_state;
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assert(t);
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old_state = t->state;
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t->state = state;
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if (state != old_state)
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log_debug("%s changed %s -> %s",
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UNIT(t)->id,
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target_state_to_string(old_state),
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target_state_to_string(state));
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unit_notify(UNIT(t), state_translation_table[old_state], state_translation_table[state], true);
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}
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static int target_add_default_dependencies(Target *t) {
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static const UnitDependency deps[] = {
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UNIT_REQUIRES,
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UNIT_REQUIRES_OVERRIDABLE,
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UNIT_REQUISITE,
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UNIT_REQUISITE_OVERRIDABLE,
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UNIT_WANTS,
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UNIT_BINDS_TO,
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UNIT_PART_OF
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};
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Iterator i;
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Unit *other;
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int r;
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unsigned k;
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assert(t);
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/* Imply ordering for requirement dependencies on target
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* units. Note that when the user created a contradicting
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* ordering manually we won't add anything in here to make
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* sure we don't create a loop. */
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for (k = 0; k < ELEMENTSOF(deps); k++)
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SET_FOREACH(other, UNIT(t)->dependencies[deps[k]], i) {
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r = unit_add_default_target_dependency(other, UNIT(t));
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if (r < 0)
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return r;
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}
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/* Make sure targets are unloaded on shutdown */
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return unit_add_dependency_by_name(UNIT(t), UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true);
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}
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static int target_load(Unit *u) {
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Target *t = TARGET(u);
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int r;
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assert(t);
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r = unit_load_fragment_and_dropin(u);
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if (r < 0)
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return r;
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/* This is a new unit? Then let's add in some extras */
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if (u->load_state == UNIT_LOADED && u->default_dependencies) {
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r = target_add_default_dependencies(t);
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if (r < 0)
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return r;
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}
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return 0;
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}
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static int target_coldplug(Unit *u) {
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Target *t = TARGET(u);
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assert(t);
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assert(t->state == TARGET_DEAD);
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if (t->deserialized_state != t->state)
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target_set_state(t, t->deserialized_state);
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return 0;
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}
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static void target_dump(Unit *u, FILE *f, const char *prefix) {
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Target *t = TARGET(u);
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assert(t);
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assert(f);
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fprintf(f,
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"%sTarget State: %s\n",
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prefix, target_state_to_string(t->state));
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}
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static int target_start(Unit *u) {
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Target *t = TARGET(u);
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assert(t);
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assert(t->state == TARGET_DEAD);
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target_set_state(t, TARGET_ACTIVE);
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return 1;
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}
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static int target_stop(Unit *u) {
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Target *t = TARGET(u);
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assert(t);
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assert(t->state == TARGET_ACTIVE);
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target_set_state(t, TARGET_DEAD);
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return 1;
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}
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static int target_serialize(Unit *u, FILE *f, FDSet *fds) {
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Target *s = TARGET(u);
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assert(s);
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assert(f);
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assert(fds);
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unit_serialize_item(u, f, "state", target_state_to_string(s->state));
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return 0;
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}
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static int target_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
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Target *s = TARGET(u);
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assert(u);
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assert(key);
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assert(value);
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assert(fds);
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if (streq(key, "state")) {
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TargetState state;
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state = target_state_from_string(value);
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if (state < 0)
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log_debug("Failed to parse state value %s", value);
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else
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s->deserialized_state = state;
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} else
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log_debug("Unknown serialization key '%s'", key);
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return 0;
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}
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_pure_ static UnitActiveState target_active_state(Unit *u) {
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assert(u);
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return state_translation_table[TARGET(u)->state];
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}
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_pure_ static const char *target_sub_state_to_string(Unit *u) {
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assert(u);
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return target_state_to_string(TARGET(u)->state);
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}
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static const char* const target_state_table[_TARGET_STATE_MAX] = {
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[TARGET_DEAD] = "dead",
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[TARGET_ACTIVE] = "active"
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};
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DEFINE_STRING_TABLE_LOOKUP(target_state, TargetState);
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const UnitVTable target_vtable = {
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.object_size = sizeof(Target),
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.sections =
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"Unit\0"
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"Target\0"
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"Install\0",
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.load = target_load,
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.coldplug = target_coldplug,
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.dump = target_dump,
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.start = target_start,
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.stop = target_stop,
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.serialize = target_serialize,
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.deserialize_item = target_deserialize_item,
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.active_state = target_active_state,
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.sub_state_to_string = target_sub_state_to_string,
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.bus_vtable = bus_target_vtable,
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.status_message_formats = {
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.finished_start_job = {
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[JOB_DONE] = "Reached target %s.",
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},
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.finished_stop_job = {
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[JOB_DONE] = "Stopped target %s.",
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},
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},
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};
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