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authorLennart Poettering <lennart@poettering.net>2010-05-16 18:45:24 +0200
committerLennart Poettering <lennart@poettering.net>2010-05-16 18:45:24 +0200
commite99e38bbdcca3fe5956823bdb3d38544ccf93221 (patch)
tree109871cf2bdcad19105d55f4eea62d5495a8f614 /src/target.c
parentbuild-sys: use autoconf'igured mkdir/ln/sed programs (diff)
downloadsystemd-e99e38bbdcca3fe5956823bdb3d38544ccf93221.tar.xz
systemd-e99e38bbdcca3fe5956823bdb3d38544ccf93221.zip
build-sys: move source files to subdirectory
Diffstat (limited to 'src/target.c')
-rw-r--r--src/target.c194
1 files changed, 194 insertions, 0 deletions
diff --git a/src/target.c b/src/target.c
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+/*-*- 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 <http://www.gnu.org/licenses/>.
+***/
+
+#include <errno.h>
+#include <signal.h>
+
+#include "unit.h"
+#include "target.h"
+#include "load-fragment.h"
+#include "log.h"
+#include "dbus-target.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)->meta.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]);
+}
+
+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);
+}
+
+int target_get_runlevel(Target *t) {
+
+ static const struct {
+ const char *special;
+ const int runlevel;
+ } table[] = {
+ { SPECIAL_RUNLEVEL5_TARGET, '5' },
+ { SPECIAL_RUNLEVEL4_TARGET, '4' },
+ { SPECIAL_RUNLEVEL3_TARGET, '3' },
+ { SPECIAL_RUNLEVEL2_TARGET, '2' },
+ { SPECIAL_RUNLEVEL1_TARGET, '1' },
+ { SPECIAL_RUNLEVEL0_TARGET, '0' },
+ { SPECIAL_RUNLEVEL6_TARGET, '6' },
+ };
+
+ unsigned i;
+
+ assert(t);
+
+ /* Tries to determine if this is a SysV runlevel and returns
+ * it if that is so. */
+
+ for (i = 0; i < ELEMENTSOF(table); i++)
+ if (unit_has_name(UNIT(t), table[i].special))
+ return table[i].runlevel;
+
+ return 0;
+}
+
+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",
+
+ .load = unit_load_fragment_and_dropin,
+ .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_message_handler = bus_target_message_handler
+};