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1 | /*-*- Mode: C; c-basic-offset: 8 -*-*/ | |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
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. | |
12 | ||
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. | |
17 | ||
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/>. | |
20 | ***/ | |
21 | ||
22 | #include <errno.h> | |
23 | #include <signal.h> | |
24 | ||
25 | #include "unit.h" | |
26 | #include "target.h" | |
27 | #include "load-fragment.h" | |
28 | #include "log.h" | |
29 | ||
30 | static const UnitActiveState state_translation_table[_TARGET_STATE_MAX] = { | |
31 | [TARGET_DEAD] = UNIT_INACTIVE, | |
32 | [TARGET_ACTIVE] = UNIT_ACTIVE | |
33 | }; | |
34 | ||
35 | static const char* const state_string_table[_TARGET_STATE_MAX] = { | |
36 | [TARGET_DEAD] = "dead", | |
37 | [TARGET_ACTIVE] = "active" | |
38 | }; | |
39 | ||
40 | static void target_dump(Unit *u, FILE *f, const char *prefix) { | |
41 | Target *t = TARGET(u); | |
42 | ||
43 | assert(t); | |
44 | assert(f); | |
45 | ||
46 | fprintf(f, | |
47 | "%sTarget State: %s\n", | |
48 | prefix, state_string_table[t->state]); | |
49 | } | |
50 | ||
51 | static void target_set_state(Target *t, TargetState state) { | |
52 | TargetState old_state; | |
53 | assert(t); | |
54 | ||
55 | if (state == t->state) | |
56 | return; | |
57 | ||
58 | old_state = t->state; | |
59 | t->state = state; | |
60 | ||
61 | log_debug("%s changed %s → %s", unit_id(UNIT(t)), state_string_table[old_state], state_string_table[state]); | |
62 | ||
63 | unit_notify(UNIT(t), state_translation_table[old_state], state_translation_table[state]); | |
64 | } | |
65 | ||
66 | static int target_start(Unit *u) { | |
67 | Target *t = TARGET(u); | |
68 | ||
69 | assert(t); | |
70 | assert(t->state == TARGET_DEAD); | |
71 | ||
72 | target_set_state(t, TARGET_ACTIVE); | |
73 | return 0; | |
74 | } | |
75 | ||
76 | static int target_stop(Unit *u) { | |
77 | Target *t = TARGET(u); | |
78 | ||
79 | assert(t); | |
80 | assert(t->state == TARGET_ACTIVE); | |
81 | ||
82 | target_set_state(t, TARGET_DEAD); | |
83 | return 0; | |
84 | } | |
85 | ||
86 | static UnitActiveState target_active_state(Unit *u) { | |
87 | assert(u); | |
88 | ||
89 | return state_translation_table[TARGET(u)->state]; | |
90 | } | |
91 | ||
92 | const UnitVTable target_vtable = { | |
93 | .suffix = ".target", | |
94 | ||
95 | .init = unit_load_fragment_and_dropin, | |
96 | ||
97 | .dump = target_dump, | |
98 | ||
99 | .start = target_start, | |
100 | .stop = target_stop, | |
101 | ||
102 | .active_state = target_active_state | |
103 | }; |