1 /*-*- Mode: C; c-basic-offset: 8 -*-*/
4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
27 #include "load-fragment.h"
29 #include "dbus-target.h"
31 static const UnitActiveState state_translation_table
[_TARGET_STATE_MAX
] = {
32 [TARGET_DEAD
] = UNIT_INACTIVE
,
33 [TARGET_ACTIVE
] = UNIT_ACTIVE
36 static void target_set_state(Target
*t
, TargetState state
) {
37 TargetState old_state
;
43 if (state
!= old_state
)
44 log_debug("%s changed %s → %s",
46 target_state_to_string(old_state
),
47 target_state_to_string(state
));
49 unit_notify(UNIT(t
), state_translation_table
[old_state
], state_translation_table
[state
]);
52 static int target_coldplug(Unit
*u
) {
53 Target
*t
= TARGET(u
);
56 assert(t
->state
== TARGET_DEAD
);
58 if (t
->deserialized_state
!= t
->state
)
59 target_set_state(t
, t
->deserialized_state
);
64 static void target_dump(Unit
*u
, FILE *f
, const char *prefix
) {
65 Target
*t
= TARGET(u
);
71 "%sTarget State: %s\n",
72 prefix
, target_state_to_string(t
->state
));
75 static int target_start(Unit
*u
) {
76 Target
*t
= TARGET(u
);
79 assert(t
->state
== TARGET_DEAD
);
81 target_set_state(t
, TARGET_ACTIVE
);
85 static int target_stop(Unit
*u
) {
86 Target
*t
= TARGET(u
);
89 assert(t
->state
== TARGET_ACTIVE
);
91 target_set_state(t
, TARGET_DEAD
);
95 static int target_serialize(Unit
*u
, FILE *f
, FDSet
*fds
) {
96 Target
*s
= TARGET(u
);
102 unit_serialize_item(u
, f
, "state", target_state_to_string(s
->state
));
106 static int target_deserialize_item(Unit
*u
, const char *key
, const char *value
, FDSet
*fds
) {
107 Target
*s
= TARGET(u
);
114 if (streq(key
, "state")) {
117 if ((state
= target_state_from_string(value
)) < 0)
118 log_debug("Failed to parse state value %s", value
);
120 s
->deserialized_state
= state
;
123 log_debug("Unknown serialization key '%s'", key
);
128 static UnitActiveState
target_active_state(Unit
*u
) {
131 return state_translation_table
[TARGET(u
)->state
];
134 static const char *target_sub_state_to_string(Unit
*u
) {
137 return target_state_to_string(TARGET(u
)->state
);
140 int target_get_runlevel(Target
*t
) {
142 static const struct {
146 { SPECIAL_RUNLEVEL5_TARGET
, '5' },
147 { SPECIAL_RUNLEVEL4_TARGET
, '4' },
148 { SPECIAL_RUNLEVEL3_TARGET
, '3' },
149 { SPECIAL_RUNLEVEL2_TARGET
, '2' },
150 { SPECIAL_RUNLEVEL1_TARGET
, '1' },
151 { SPECIAL_RUNLEVEL0_TARGET
, '0' },
152 { SPECIAL_RUNLEVEL6_TARGET
, '6' },
159 /* Tries to determine if this is a SysV runlevel and returns
160 * it if that is so. */
162 for (i
= 0; i
< ELEMENTSOF(table
); i
++)
163 if (unit_has_name(UNIT(t
), table
[i
].special
))
164 return table
[i
].runlevel
;
169 static const char* const target_state_table
[_TARGET_STATE_MAX
] = {
170 [TARGET_DEAD
] = "dead",
171 [TARGET_ACTIVE
] = "active"
174 DEFINE_STRING_TABLE_LOOKUP(target_state
, TargetState
);
176 const UnitVTable target_vtable
= {
179 .load
= unit_load_fragment_and_dropin
,
180 .coldplug
= target_coldplug
,
184 .start
= target_start
,
187 .serialize
= target_serialize
,
188 .deserialize_item
= target_deserialize_item
,
190 .active_state
= target_active_state
,
191 .sub_state_to_string
= target_sub_state_to_string
,
193 .bus_message_handler
= bus_target_message_handler