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Diffstat (limited to 'src/shared/conf-parser.h')
| -rw-r--r-- | src/shared/conf-parser.h | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/src/shared/conf-parser.h b/src/shared/conf-parser.h new file mode 100644 index 000000000..be7d70817 --- /dev/null +++ b/src/shared/conf-parser.h @@ -0,0 +1,135 @@ +/*-*- 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 |