--- /dev/null
+/*-*- 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 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 <http://www.gnu.org/licenses/>.
+***/
+
+#include <errno.h>
+#include <signal.h>
+#include <unistd.h>
+
+#include "unit.h"
+#include "target.h"
+#include "load-fragment.h"
+#include "log.h"
+#include "dbus-target.h"
+#include "special.h"
+#include "unit-name.h"
+
+static const UnitActiveState state_translation_table[_TARGET_STATE_MAX] = {
+ [TARGET_DEAD] = UNIT_INACTIVE,
+ [TARGET_ACTIVE] = UNIT_ACTIVE
+};
+
+static void target_set_state(Target *t, TargetState state) {
+ TargetState old_state;
+ assert(t);
+
+ old_state = t->state;
+ t->state = state;
+
+ if (state != old_state)
+ log_debug("%s changed %s -> %s",
+ UNIT(t)->id,
+ target_state_to_string(old_state),
+ target_state_to_string(state));
+
+ unit_notify(UNIT(t), state_translation_table[old_state], state_translation_table[state], true);
+}
+
+static int target_add_default_dependencies(Target *t) {
+ static const UnitDependency deps[] = {
+ UNIT_REQUIRES,
+ UNIT_REQUIRES_OVERRIDABLE,
+ UNIT_REQUISITE,
+ UNIT_REQUISITE_OVERRIDABLE,
+ UNIT_WANTS,
+ UNIT_BIND_TO
+ };
+
+ Iterator i;
+ Unit *other;
+ int r;
+ unsigned k;
+
+ assert(t);
+
+ /* Imply ordering for requirement dependencies on target
+ * units. Note that when the user created a contradicting
+ * ordering manually we won't add anything in here to make
+ * sure we don't create a loop. */
+
+ for (k = 0; k < ELEMENTSOF(deps); k++)
+ SET_FOREACH(other, UNIT(t)->dependencies[deps[k]], i)
+ if ((r = unit_add_default_target_dependency(other, UNIT(t))) < 0)
+ return r;
+
+ /* Make sure targets are unloaded on shutdown */
+ return unit_add_dependency_by_name(UNIT(t), UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true);
+}
+
+static int target_load(Unit *u) {
+ Target *t = TARGET(u);
+ int r;
+
+ assert(t);
+
+ if ((r = unit_load_fragment_and_dropin(u)) < 0)
+ return r;
+
+ /* This is a new unit? Then let's add in some extras */
+ if (u->load_state == UNIT_LOADED) {
+ if (u->default_dependencies)
+ if ((r = target_add_default_dependencies(t)) < 0)
+ return r;
+ }
+
+ return 0;
+}
+
+static int target_coldplug(Unit *u) {
+ Target *t = TARGET(u);
+
+ assert(t);
+ assert(t->state == TARGET_DEAD);
+
+ if (t->deserialized_state != t->state)
+ target_set_state(t, t->deserialized_state);
+
+ return 0;
+}
+
+static void target_dump(Unit *u, FILE *f, const char *prefix) {
+ Target *t = TARGET(u);
+
+ assert(t);
+ assert(f);
+
+ fprintf(f,
+ "%sTarget State: %s\n",
+ prefix, target_state_to_string(t->state));
+}
+
+static int target_start(Unit *u) {
+ Target *t = TARGET(u);
+
+ assert(t);
+ assert(t->state == TARGET_DEAD);
+
+ target_set_state(t, TARGET_ACTIVE);
+ return 0;
+}
+
+static int target_stop(Unit *u) {
+ Target *t = TARGET(u);
+
+ assert(t);
+ assert(t->state == TARGET_ACTIVE);
+
+ target_set_state(t, TARGET_DEAD);
+ return 0;
+}
+
+static int target_serialize(Unit *u, FILE *f, FDSet *fds) {
+ Target *s = TARGET(u);
+
+ assert(s);
+ assert(f);
+ assert(fds);
+
+ unit_serialize_item(u, f, "state", target_state_to_string(s->state));
+ return 0;
+}
+
+static int target_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
+ Target *s = TARGET(u);
+
+ assert(u);
+ assert(key);
+ assert(value);
+ assert(fds);
+
+ if (streq(key, "state")) {
+ TargetState state;
+
+ if ((state = target_state_from_string(value)) < 0)
+ log_debug("Failed to parse state value %s", value);
+ else
+ s->deserialized_state = state;
+
+ } else
+ log_debug("Unknown serialization key '%s'", key);
+
+ return 0;
+}
+
+static UnitActiveState target_active_state(Unit *u) {
+ assert(u);
+
+ return state_translation_table[TARGET(u)->state];
+}
+
+static const char *target_sub_state_to_string(Unit *u) {
+ assert(u);
+
+ return target_state_to_string(TARGET(u)->state);
+}
+
+static const char* const target_state_table[_TARGET_STATE_MAX] = {
+ [TARGET_DEAD] = "dead",
+ [TARGET_ACTIVE] = "active"
+};
+
+DEFINE_STRING_TABLE_LOOKUP(target_state, TargetState);
+
+const UnitVTable target_vtable = {
+ .suffix = ".target",
+ .object_size = sizeof(Target),
+ .sections =
+ "Unit\0"
+ "Target\0"
+ "Install\0",
+
+ .load = target_load,
+ .coldplug = target_coldplug,
+
+ .dump = target_dump,
+
+ .start = target_start,
+ .stop = target_stop,
+
+ .serialize = target_serialize,
+ .deserialize_item = target_deserialize_item,
+
+ .active_state = target_active_state,
+ .sub_state_to_string = target_sub_state_to_string,
+
+ .bus_interface = "org.freedesktop.systemd1.Target",
+ .bus_message_handler = bus_target_message_handler
+};
~ianmdlvl / elogind.git / blobdiff