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
|
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
#ifndef fooconfparserhfoo
#define fooconfparserhfoo
/***
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 <stdio.h>
#include <stdbool.h>
/* An abstract parser for simple, line based, shallow configuration
* files consisting of variable assignments only. */
/* Prototype for a parser for a specific configuration setting */
typedef int (*ConfigParserCallback)(
const char *filename,
unsigned line,
const char *section,
const char *lvalue,
int ltype,
const char *rvalue,
void *data,
void *userdata);
/* Wraps information for parsing a specific configuration variable, to
* be stored in a simple array */
typedef struct ConfigTableItem {
const char *section; /* Section */
const char *lvalue; /* Name of the variable */
ConfigParserCallback parse; /* Function that is called to parse the variable's value */
int ltype; /* Distinguish different variables passed to the same callback */
void *data; /* Where to store the variable's data */
} ConfigTableItem;
/* Wraps information for parsing a specific configuration variable, to
* ve srored in a gperf perfect hashtable */
typedef struct ConfigPerfItem {
const char *section_and_lvalue; /* Section + "." + name of the variable */
ConfigParserCallback parse; /* Function that is called to parse the variable's value */
int ltype; /* Distinguish different variables passed to the same callback */
size_t offset; /* Offset where to store data, from the beginning of userdata */
} ConfigPerfItem;
/* Prototype for a low-level gperf lookup function */
typedef const ConfigPerfItem* (*ConfigPerfItemLookup)(const char *section_and_lvalue, unsigned length);
/* Prototype for a generic high-level lookup function */
typedef int (*ConfigItemLookup)(
void *table,
const char *section,
const char *lvalue,
ConfigParserCallback *func,
int *ltype,
void **data,
void *userdata);
/* Linear table search implementation of ConfigItemLookup, based on
* ConfigTableItem arrays */
int config_item_table_lookup(void *table, const char *section, const char *lvalue, ConfigParserCallback *func, int *ltype, void **data, void *userdata);
/* gperf implementation of ConfigItemLookup, based on gperf
* ConfigPerfItem tables */
int config_item_perf_lookup(void *table, const char *section, const char *lvalue, ConfigParserCallback *func, int *ltype, void **data, void *userdata);
int config_parse(
const char *filename,
FILE *f,
const char *sections, /* nulstr */
ConfigItemLookup lookup,
void *table,
bool relaxed,
void *userdata);
/* Generic parsers */
int config_parse_int(const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
int config_parse_unsigned(const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
int config_parse_long(const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
int config_parse_uint64(const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
int config_parse_bytes_size(const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
int config_parse_bytes_off(const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
int config_parse_bool(const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
int config_parse_tristate(const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
int config_parse_string(const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
int config_parse_path(const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
int config_parse_strv(const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
int config_parse_path_strv(const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
int config_parse_usec(const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
int config_parse_mode(const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
#define DEFINE_CONFIG_PARSE_ENUM(function,name,type,msg) \
int function( \
const char *filename, \
unsigned line, \
const char *section, \
const char *lvalue, \
int ltype, \
const char *rvalue, \
void *data, \
void *userdata) { \
\
type *i = data, x; \
\
assert(filename); \
assert(lvalue); \
assert(rvalue); \
assert(data); \
\
if ((x = name##_from_string(rvalue)) < 0) { \
log_error("[%s:%u] " msg ", ignoring: %s", filename, line, rvalue); \
return 0; \
} \
\
*i = x; \
\
return 0; \
}
#endif
|
