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141 lines
3.7 KiB
C
141 lines
3.7 KiB
C
/*-*- Mode: C; c-basic-offset: 8 -*-*/
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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 General Public License as published by
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the Free Software Foundation; either version 2 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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General Public License for more details.
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You should have received a copy of the GNU 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 <errno.h>
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#include <signal.h>
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#include "unit.h"
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#include "target.h"
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#include "load-fragment.h"
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#include "log.h"
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#include "dbus-target.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 const char* const state_string_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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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, state_string_table[t->state]);
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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", UNIT(t)->meta.id, state_string_table[old_state], state_string_table[state]);
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unit_notify(UNIT(t), state_translation_table[old_state], state_translation_table[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 0;
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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 0;
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}
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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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static const char *target_sub_state_to_string(Unit *u) {
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assert(u);
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return state_string_table[TARGET(u)->state];
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}
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int target_get_runlevel(Target *t) {
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static const struct {
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const char *special;
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const int runlevel;
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} table[] = {
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{ SPECIAL_RUNLEVEL5_TARGET, '5' },
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{ SPECIAL_RUNLEVEL4_TARGET, '4' },
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{ SPECIAL_RUNLEVEL3_TARGET, '3' },
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{ SPECIAL_RUNLEVEL2_TARGET, '2' },
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{ SPECIAL_RUNLEVEL1_TARGET, '1' },
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{ SPECIAL_RUNLEVEL0_TARGET, '0' },
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{ SPECIAL_RUNLEVEL6_TARGET, '6' },
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};
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unsigned i;
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assert(t);
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/* Tries to determine if this is a SysV runlevel and returns
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* it if that is so. */
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for (i = 0; i < ELEMENTSOF(table); i++)
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if (unit_has_name(UNIT(t), table[i].special))
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return table[i].runlevel;
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return 0;
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}
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const UnitVTable target_vtable = {
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.suffix = ".target",
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.load = unit_load_fragment_and_dropin,
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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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.active_state = target_active_state,
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.sub_state_to_string = target_sub_state_to_string,
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.bus_message_handler = bus_target_message_handler
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};
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