1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
6 This file is part of systemd.
8 Copyright 2010 Lennart Poettering
10 systemd is free software; you can redistribute it and/or modify it
11 under the terms of the GNU Lesser General Public License as published by
12 the Free Software Foundation; either version 2.1 of the License, or
13 (at your option) any later version.
15 systemd is distributed in the hope that it will be useful, but
16 WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 Lesser General Public License for more details.
20 You should have received a copy of the GNU Lesser General Public License
21 along with systemd; If not, see <http://www.gnu.org/licenses/>.
29 /* An abstract parser for simple, line based, shallow configuration
30 * files consisting of variable assignments only. */
32 /* Prototype for a parser for a specific configuration setting */
33 typedef int (*ConfigParserCallback)(const char *unit,
37 unsigned section_line,
44 /* Wraps information for parsing a specific configuration variable, to
45 * be stored in a simple array */
46 typedef struct ConfigTableItem {
47 const char *section; /* Section */
48 const char *lvalue; /* Name of the variable */
49 ConfigParserCallback parse; /* Function that is called to parse the variable's value */
50 int ltype; /* Distinguish different variables passed to the same callback */
51 void *data; /* Where to store the variable's data */
54 /* Wraps information for parsing a specific configuration variable, to
55 * ve srored in a gperf perfect hashtable */
56 typedef struct ConfigPerfItem {
57 const char *section_and_lvalue; /* Section + "." + name of the variable */
58 ConfigParserCallback parse; /* Function that is called to parse the variable's value */
59 int ltype; /* Distinguish different variables passed to the same callback */
60 size_t offset; /* Offset where to store data, from the beginning of userdata */
63 /* Prototype for a low-level gperf lookup function */
64 typedef const ConfigPerfItem* (*ConfigPerfItemLookup)(const char *section_and_lvalue, unsigned length);
66 /* Prototype for a generic high-level lookup function */
67 typedef int (*ConfigItemLookup)(
71 ConfigParserCallback *func,
76 /* Linear table search implementation of ConfigItemLookup, based on
77 * ConfigTableItem arrays */
78 int config_item_table_lookup(void *table, const char *section, const char *lvalue, ConfigParserCallback *func, int *ltype, void **data, void *userdata);
80 /* gperf implementation of ConfigItemLookup, based on gperf
81 * ConfigPerfItem tables */
82 int config_item_perf_lookup(void *table, const char *section, const char *lvalue, ConfigParserCallback *func, int *ltype, void **data, void *userdata);
84 int config_parse(const char *unit,
87 const char *sections, /* nulstr */
88 ConfigItemLookup lookup,
95 int config_parse_int(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
96 int config_parse_unsigned(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
97 int config_parse_long(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
98 int config_parse_uint64(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
99 int config_parse_double(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
100 int config_parse_bytes_size(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
101 int config_parse_bytes_off(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
102 int config_parse_bool(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
103 int config_parse_show_status(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
104 int config_parse_string(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
105 int config_parse_path(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
106 int config_parse_strv(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
107 int config_parse_path_strv(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
108 int config_parse_sec(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
109 int config_parse_nsec(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
110 int config_parse_mode(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
111 int config_parse_facility(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
112 int config_parse_level(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
113 int config_parse_set_status(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
115 int log_syntax_internal(const char *unit, int level,
116 const char *file, unsigned line, const char *func,
117 const char *config_file, unsigned config_line,
118 int error, const char *format, ...) _printf_(9, 10);
120 #define log_syntax(unit, level, config_file, config_line, error, ...) \
121 log_syntax_internal(unit, level, \
122 __FILE__, __LINE__, __func__, \
123 config_file, config_line, \
126 #define DEFINE_CONFIG_PARSE_ENUM(function,name,type,msg) \
127 int function(const char *unit, \
128 const char *filename, \
130 const char *section, \
131 unsigned section_line, \
132 const char *lvalue, \
134 const char *rvalue, \
145 if ((x = name##_from_string(rvalue)) < 0) { \
146 log_syntax(unit, LOG_ERR, filename, line, -x, \
147 msg ", ignoring: %s", rvalue); \
155 #define DEFINE_CONFIG_PARSE_ENUMV(function,name,type,invalid,msg) \
156 int function(const char *unit, \
157 const char *filename, \
159 const char *section, \
160 unsigned section_line, \
161 const char *lvalue, \
163 const char *rvalue, \
167 type **enums = data, *xs, x, *ys; \
176 xs = new0(type, 1); \
179 FOREACH_WORD(w, l, rvalue, state) { \
180 _cleanup_free_ char *en = NULL; \
182 en = strndup(w, l); \
186 if ((x = name##_from_string(en)) < 0) { \
187 log_syntax(unit, LOG_ERR, filename, line, \
188 -x, msg ", ignoring: %s", en); \
192 for (ys = xs; x != invalid && *ys != invalid; ys++) { \
194 log_syntax(unit, LOG_ERR, filename, \
196 "Duplicate entry, ignoring: %s", \
206 xs = realloc(xs, (++i + 1) * sizeof(type)); \
209 *(xs + i) = invalid; \