| #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 <errno.h> |
| #include <stdbool.h> |
| #include <stddef.h> |
| #include <stdio.h> |
| #include <syslog.h> |
| |
| #include "alloc-util.h" |
| #include "log.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 |
| * be stored 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)( |
| const 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(const 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(const 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, |
| const void *table, |
| bool relaxed, |
| bool allow_include, |
| bool warn, |
| void *userdata); |
| |
| int config_parse_many(const char *conf_file, /* possibly NULL */ |
| const char *conf_file_dirs, /* nulstr */ |
| const char *sections, /* nulstr */ |
| ConfigItemLookup lookup, |
| const void *table, |
| bool relaxed, |
| 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_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); |
| 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_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); |
| 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); |
| 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); |
| 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_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); |
| 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_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_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); |
| 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); |
| 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); |
| 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); |
| 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); |
| |
| #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, x, *ys; \ |
| _cleanup_free_ type *xs = NULL; \ |
| const char *word, *state; \ |
| size_t l, i = 0; \ |
| \ |
| assert(filename); \ |
| assert(lvalue); \ |
| assert(rvalue); \ |
| assert(data); \ |
| \ |
| xs = new0(type, 1); \ |
| if (!xs) \ |
| return -ENOMEM; \ |
| \ |
| *xs = invalid; \ |
| \ |
| FOREACH_WORD(word, l, rvalue, state) { \ |
| _cleanup_free_ char *en = NULL; \ |
| type *new_xs; \ |
| \ |
| en = strndup(word, 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; \ |
| new_xs = realloc(xs, (++i + 1) * sizeof(type)); \ |
| if (new_xs) \ |
| xs = new_xs; \ |
| else \ |
| return -ENOMEM; \ |
| \ |
| *(xs + i) = invalid; \ |
| } \ |
| \ |
| free(*enums); \ |
| *enums = xs; \ |
| xs = NULL; \ |
| \ |
| return 0; \ |
| } |