summaryrefslogtreecommitdiff
path: root/src/shared/unit-name.h
blob: c2f31e3f9006cc7ceca201e88ca0f56ebaa3fbcd (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/

#pragma once

/***
  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 Lesser General Public License as published by
  the Free Software Foundation; either version 2.1 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
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public License
  along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/

#include <stdbool.h>

#include "macro.h"

#define UNIT_NAME_MAX 256

typedef enum UnitType UnitType;
typedef enum UnitLoadState UnitLoadState;
typedef enum UnitDependency UnitDependency;

enum UnitType {
        UNIT_SERVICE = 0,
        UNIT_SOCKET,
        UNIT_BUSNAME,
        UNIT_TARGET,
        UNIT_SNAPSHOT,
        UNIT_DEVICE,
        UNIT_MOUNT,
        UNIT_AUTOMOUNT,
        UNIT_SWAP,
        UNIT_TIMER,
        UNIT_PATH,
        UNIT_SLICE,
        UNIT_SCOPE,
        _UNIT_TYPE_MAX,
        _UNIT_TYPE_INVALID = -1
};

enum UnitLoadState {
        UNIT_STUB = 0,
        UNIT_LOADED,
        UNIT_NOT_FOUND,
        UNIT_ERROR,
        UNIT_MERGED,
        UNIT_MASKED,
        _UNIT_LOAD_STATE_MAX,
        _UNIT_LOAD_STATE_INVALID = -1
};

enum UnitDependency {
        /* Positive dependencies */
        UNIT_REQUIRES,
        UNIT_REQUIRES_OVERRIDABLE,
        UNIT_REQUISITE,
        UNIT_REQUISITE_OVERRIDABLE,
        UNIT_WANTS,
        UNIT_BINDS_TO,
        UNIT_PART_OF,

        /* Inverse of the above */
        UNIT_REQUIRED_BY,             /* inverse of 'requires' and 'requisite' is 'required_by' */
        UNIT_REQUIRED_BY_OVERRIDABLE, /* inverse of 'requires_overridable' and 'requisite_overridable' is 'soft_required_by' */
        UNIT_WANTED_BY,               /* inverse of 'wants' */
        UNIT_BOUND_BY,                /* inverse of 'binds_to' */
        UNIT_CONSISTS_OF,             /* inverse of 'part_of' */

        /* Negative dependencies */
        UNIT_CONFLICTS,               /* inverse of 'conflicts' is 'conflicted_by' */
        UNIT_CONFLICTED_BY,

        /* Order */
        UNIT_BEFORE,                  /* inverse of 'before' is 'after' and vice versa */
        UNIT_AFTER,

        /* On Failure */
        UNIT_ON_FAILURE,

        /* Triggers (i.e. a socket triggers a service) */
        UNIT_TRIGGERS,
        UNIT_TRIGGERED_BY,

        /* Propagate reloads */
        UNIT_PROPAGATES_RELOAD_TO,
        UNIT_RELOAD_PROPAGATED_FROM,

        /* Joins namespace of */
        UNIT_JOINS_NAMESPACE_OF,

        /* Reference information for GC logic */
        UNIT_REFERENCES,              /* Inverse of 'references' is 'referenced_by' */
        UNIT_REFERENCED_BY,

        _UNIT_DEPENDENCY_MAX,
        _UNIT_DEPENDENCY_INVALID = -1
};

typedef enum UnitNameFlags {
        UNIT_NAME_PLAIN = 1,      /* Allow foo.service */
        UNIT_NAME_INSTANCE = 2,   /* Allow foo@bar.service */
        UNIT_NAME_TEMPLATE = 4,   /* Allow foo@.service */
        UNIT_NAME_ANY = UNIT_NAME_PLAIN|UNIT_NAME_INSTANCE|UNIT_NAME_TEMPLATE,
} UnitNameFlags;

bool unit_name_is_valid(const char *n, UnitNameFlags flags) _pure_;
bool unit_prefix_is_valid(const char *p) _pure_;
bool unit_instance_is_valid(const char *i) _pure_;
bool unit_suffix_is_valid(const char *s) _pure_;

static inline int unit_prefix_and_instance_is_valid(const char *p) {
        /* For prefix+instance and instance the same rules apply */
        return unit_instance_is_valid(p);
}

int unit_name_to_prefix(const char *n, char **prefix);
int unit_name_to_instance(const char *n, char **instance);
int unit_name_to_prefix_and_instance(const char *n, char **ret);

UnitType unit_name_to_type(const char *n) _pure_;

int unit_name_change_suffix(const char *n, const char *suffix, char **ret);

int unit_name_build(const char *prefix, const char *instance, const char *suffix, char **ret);

char *unit_name_escape(const char *f);
int unit_name_unescape(const char *f, char **ret);
int unit_name_path_escape(const char *f, char **ret);
int unit_name_path_unescape(const char *f, char **ret);

int unit_name_replace_instance(const char *f, const char *i, char **ret);

int unit_name_template(const char *f, char **ret);

int unit_name_from_path(const char *path, const char *suffix, char **ret);
int unit_name_from_path_instance(const char *prefix, const char *path, const char *suffix, char **ret);
int unit_name_to_path(const char *name, char **ret);

char *unit_dbus_path_from_name(const char *name);
int unit_name_from_dbus_path(const char *path, char **name);

typedef enum UnitNameMangle {
        UNIT_NAME_NOGLOB,
        UNIT_NAME_GLOB,
} UnitNameMangle;

int unit_name_mangle_with_suffix(const char *name, UnitNameMangle allow_globs, const char *suffix, char **ret);

static inline int unit_name_mangle(const char *name, UnitNameMangle allow_globs, char **ret) {
        return unit_name_mangle_with_suffix(name, allow_globs, ".service", ret);
}

int slice_build_parent_slice(const char *slice, char **ret);
int slice_build_subslice(const char *slice, const char*name, char **subslice);
bool slice_name_is_valid(const char *name);

const char *unit_type_to_string(UnitType i) _const_;
UnitType unit_type_from_string(const char *s) _pure_;

const char *unit_load_state_to_string(UnitLoadState i) _const_;
UnitLoadState unit_load_state_from_string(const char *s) _pure_;

const char *unit_dependency_to_string(UnitDependency i) _const_;
UnitDependency unit_dependency_from_string(const char *s) _pure_;