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 Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
28 #include "alloc-util.h"
32 /* An abstract parser for simple, line based, shallow configuration
33 * files consisting of variable assignments only. */
35 /* Prototype for a parser for a specific configuration setting */
36 typedef int (*ConfigParserCallback)(const char *unit,
40 unsigned section_line,
47 /* Wraps information for parsing a specific configuration variable, to
48 * be stored in a simple array */
49 typedef struct ConfigTableItem {
50 const char *section; /* Section */
51 const char *lvalue; /* Name of the variable */
52 ConfigParserCallback parse; /* Function that is called to parse the variable's value */
53 int ltype; /* Distinguish different variables passed to the same callback */
54 void *data; /* Where to store the variable's data */
57 /* Wraps information for parsing a specific configuration variable, to
58 * be stored in a gperf perfect hashtable */
59 typedef struct ConfigPerfItem {
60 const char *section_and_lvalue; /* Section + "." + name of the variable */
61 ConfigParserCallback parse; /* Function that is called to parse the variable's value */
62 int ltype; /* Distinguish different variables passed to the same callback */
63 size_t offset; /* Offset where to store data, from the beginning of userdata */
66 /* Prototype for a low-level gperf lookup function */
67 typedef const ConfigPerfItem* (*ConfigPerfItemLookup)(const char *section_and_lvalue, unsigned length);
69 /* Prototype for a generic high-level lookup function */
70 typedef int (*ConfigItemLookup)(
74 ConfigParserCallback *func,
79 /* Linear table search implementation of ConfigItemLookup, based on
80 * ConfigTableItem arrays */
81 int config_item_table_lookup(const void *table, const char *section, const char *lvalue, ConfigParserCallback *func, int *ltype, void **data, void *userdata);
83 /* gperf implementation of ConfigItemLookup, based on gperf
84 * ConfigPerfItem tables */
85 int config_item_perf_lookup(const void *table, const char *section, const char *lvalue, ConfigParserCallback *func, int *ltype, void **data, void *userdata);
87 int config_parse(const char *unit,
90 const char *sections, /* nulstr */
91 ConfigItemLookup lookup,
98 int config_parse_many(const char *conf_file, /* possibly NULL */
99 const char *conf_file_dirs, /* nulstr */
100 const char *sections, /* nulstr */
101 ConfigItemLookup lookup,
106 /* Generic parsers */
107 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);
108 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);
109 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);
110 int config_parse_uint16(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_uint32(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_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);
113 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);
114 int config_parse_iec_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);
115 #if 0 /// UNNEEDED by elogind
116 int config_parse_si_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);
117 int config_parse_iec_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);
119 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);
120 #if 0 /// UNNEEDED by elogind
121 int config_parse_tristate(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);
123 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);
124 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);
125 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);
126 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);
127 #if 0 /// UNNEEDED by elogind
128 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);
130 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);
131 #if 0 /// UNNEEDED by elogind
132 int config_parse_log_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);
134 int config_parse_log_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);
135 int config_parse_signal(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);
136 #if 0 /// UNNEEDED by elogind
137 int config_parse_personality(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);
138 int config_parse_ifname(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);
141 #define DEFINE_CONFIG_PARSE_ENUM(function,name,type,msg) \
142 int function(const char *unit, \
143 const char *filename, \
145 const char *section, \
146 unsigned section_line, \
147 const char *lvalue, \
149 const char *rvalue, \
160 if ((x = name##_from_string(rvalue)) < 0) { \
161 log_syntax(unit, LOG_ERR, filename, line, -x, \
162 msg ", ignoring: %s", rvalue); \
170 #define DEFINE_CONFIG_PARSE_ENUMV(function,name,type,invalid,msg) \
171 int function(const char *unit, \
172 const char *filename, \
174 const char *section, \
175 unsigned section_line, \
176 const char *lvalue, \
178 const char *rvalue, \
182 type **enums = data, x, *ys; \
183 _cleanup_free_ type *xs = NULL; \
184 const char *word, *state; \
192 xs = new0(type, 1); \
198 FOREACH_WORD(word, l, rvalue, state) { \
199 _cleanup_free_ char *en = NULL; \
202 en = strndup(word, l); \
206 if ((x = name##_from_string(en)) < 0) { \
207 log_syntax(unit, LOG_ERR, filename, line, \
208 -x, msg ", ignoring: %s", en); \
212 for (ys = xs; x != invalid && *ys != invalid; ys++) { \
214 log_syntax(unit, LOG_ERR, filename, \
216 "Duplicate entry, ignoring: %s", \
226 new_xs = realloc(xs, (++i + 1) * sizeof(type)); \
232 *(xs + i) = invalid; \