/*-*- 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 <stdio.h> #include <stdbool.h> #include "macro.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 *unit, const char *filename, unsigned line, const char *section, unsigned section_line, 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 *unit, const char *filename, FILE *f, const char *sections, /* nulstr */ ConfigItemLookup lookup, void *table, bool relaxed, bool allow_include, void *userdata); /* Generic parsers */ 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); 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); 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); 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); 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); 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); 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); 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); 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); 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); 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); 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); 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); 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); 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); 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); 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); 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); int log_syntax_internal(const char *unit, int level, const char *file, unsigned line, const char *func, const char *config_file, unsigned config_line, int error, const char *format, ...) _printf_(9, 10); #define log_syntax(unit, level, config_file, config_line, error, ...) \ log_syntax_internal(unit, level, \ __FILE__, __LINE__, __func__, \ config_file, config_line, \ error, __VA_ARGS__) #define DEFINE_CONFIG_PARSE_ENUM(function,name,type,msg) \ int function(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) { \ \ type *i = data, x; \ \ assert(filename); \ assert(lvalue); \ assert(rvalue); \ assert(data); \ \ if ((x = name##_from_string(rvalue)) < 0) { \ log_syntax(unit, LOG_ERR, filename, line, -x, \ msg ", ignoring: %s", rvalue); \ return 0; \ } \ \ *i = x; \ return 0; \ } #define DEFINE_CONFIG_PARSE_ENUMV(function,name,type,invalid,msg) \ int function(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) { \ \ type **enums = data, *xs, x, *ys; \ char *w, *state; \ size_t l, i = 0; \ \ assert(filename); \ assert(lvalue); \ assert(rvalue); \ assert(data); \ \ xs = new0(type, 1); \ *xs = invalid; \ \ FOREACH_WORD(w, l, rvalue, state) { \ _cleanup_free_ char *en = NULL; \ \ en = strndup(w, l); \ if (!en) \ return -ENOMEM; \ \ if ((x = name##_from_string(en)) < 0) { \ log_syntax(unit, LOG_ERR, filename, line, \ -x, msg ", ignoring: %s", en); \ continue; \ } \ \ for (ys = xs; x != invalid && *ys != invalid; ys++) { \ if (*ys == x) { \ log_syntax(unit, LOG_ERR, filename, \ line, -x, \ "Duplicate entry, ignoring: %s", \ en); \ x = invalid; \ } \ } \ \ if (x == invalid) \ continue; \ \ *(xs + i) = x; \ xs = realloc(xs, (++i + 1) * sizeof(type)); \ if (!xs) \ return -ENOMEM; \ *(xs + i) = invalid; \ } \ \ free(*enums); \ *enums = xs; \ return 0; \ }