f757855e81
.nspawn fiels are simple settings files that may accompany container images and directories and contain settings otherwise passed on the nspawn command line. This provides an efficient way to attach execution data directly to containers.
233 lines
16 KiB
C
233 lines
16 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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#pragma once
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/***
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This file is part of systemd.
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Copyright 2010 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <stdio.h>
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#include <stdbool.h>
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#include "macro.h"
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/* An abstract parser for simple, line based, shallow configuration
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* files consisting of variable assignments only. */
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/* Prototype for a parser for a specific configuration setting */
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typedef int (*ConfigParserCallback)(const char *unit,
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const char *filename,
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unsigned line,
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const char *section,
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unsigned section_line,
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const char *lvalue,
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int ltype,
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const char *rvalue,
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void *data,
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void *userdata);
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/* Wraps information for parsing a specific configuration variable, to
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* be stored in a simple array */
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typedef struct ConfigTableItem {
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const char *section; /* Section */
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const char *lvalue; /* Name of the variable */
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ConfigParserCallback parse; /* Function that is called to parse the variable's value */
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int ltype; /* Distinguish different variables passed to the same callback */
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void *data; /* Where to store the variable's data */
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} ConfigTableItem;
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/* Wraps information for parsing a specific configuration variable, to
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* be stored in a gperf perfect hashtable */
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typedef struct ConfigPerfItem {
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const char *section_and_lvalue; /* Section + "." + name of the variable */
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ConfigParserCallback parse; /* Function that is called to parse the variable's value */
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int ltype; /* Distinguish different variables passed to the same callback */
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size_t offset; /* Offset where to store data, from the beginning of userdata */
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} ConfigPerfItem;
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/* Prototype for a low-level gperf lookup function */
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typedef const ConfigPerfItem* (*ConfigPerfItemLookup)(const char *section_and_lvalue, unsigned length);
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/* Prototype for a generic high-level lookup function */
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typedef int (*ConfigItemLookup)(
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const void *table,
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const char *section,
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const char *lvalue,
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ConfigParserCallback *func,
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int *ltype,
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void **data,
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void *userdata);
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/* Linear table search implementation of ConfigItemLookup, based on
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* ConfigTableItem arrays */
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int config_item_table_lookup(const void *table, const char *section, const char *lvalue, ConfigParserCallback *func, int *ltype, void **data, void *userdata);
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/* gperf implementation of ConfigItemLookup, based on gperf
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* ConfigPerfItem tables */
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int config_item_perf_lookup(const void *table, const char *section, const char *lvalue, ConfigParserCallback *func, int *ltype, void **data, void *userdata);
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int config_parse(const char *unit,
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const char *filename,
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FILE *f,
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const char *sections, /* nulstr */
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ConfigItemLookup lookup,
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const void *table,
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bool relaxed,
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bool allow_include,
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bool warn,
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void *userdata);
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int config_parse_many(const char *conf_file, /* possibly NULL */
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const char *conf_file_dirs, /* nulstr */
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const char *sections, /* nulstr */
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ConfigItemLookup lookup,
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const void *table,
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bool relaxed,
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void *userdata);
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/* Generic parsers */
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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);
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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);
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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);
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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);
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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);
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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);
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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);
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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);
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int config_parse_iec_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);
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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);
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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);
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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);
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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);
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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);
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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);
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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);
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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);
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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);
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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);
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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);
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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);
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#define log_invalid_utf8(unit, level, config_file, config_line, error, rvalue) \
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do { \
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_cleanup_free_ char *_p = utf8_escape_invalid(rvalue); \
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log_syntax(unit, level, config_file, config_line, error, \
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"String is not UTF-8 clean, ignoring assignment: %s", strna(_p)); \
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} while(false)
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#define DEFINE_CONFIG_PARSE_ENUM(function,name,type,msg) \
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int function(const char *unit, \
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const char *filename, \
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unsigned line, \
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const char *section, \
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unsigned section_line, \
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const char *lvalue, \
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int ltype, \
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const char *rvalue, \
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void *data, \
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void *userdata) { \
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\
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type *i = data, x; \
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\
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assert(filename); \
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assert(lvalue); \
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assert(rvalue); \
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assert(data); \
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\
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if ((x = name##_from_string(rvalue)) < 0) { \
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log_syntax(unit, LOG_ERR, filename, line, -x, \
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msg ", ignoring: %s", rvalue); \
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return 0; \
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} \
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\
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*i = x; \
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return 0; \
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}
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#define DEFINE_CONFIG_PARSE_ENUMV(function,name,type,invalid,msg) \
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int function(const char *unit, \
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const char *filename, \
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unsigned line, \
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const char *section, \
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unsigned section_line, \
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const char *lvalue, \
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int ltype, \
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const char *rvalue, \
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void *data, \
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void *userdata) { \
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\
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type **enums = data, x, *ys; \
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_cleanup_free_ type *xs = NULL; \
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const char *word, *state; \
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size_t l, i = 0; \
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\
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assert(filename); \
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assert(lvalue); \
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assert(rvalue); \
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assert(data); \
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\
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xs = new0(type, 1); \
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if(!xs) \
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return -ENOMEM; \
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\
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*xs = invalid; \
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\
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FOREACH_WORD(word, l, rvalue, state) { \
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_cleanup_free_ char *en = NULL; \
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type *new_xs; \
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\
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en = strndup(word, l); \
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if (!en) \
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return -ENOMEM; \
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\
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if ((x = name##_from_string(en)) < 0) { \
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log_syntax(unit, LOG_ERR, filename, line, \
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-x, msg ", ignoring: %s", en); \
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continue; \
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} \
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\
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for (ys = xs; x != invalid && *ys != invalid; ys++) { \
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if (*ys == x) { \
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log_syntax(unit, LOG_ERR, filename, \
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line, -x, \
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"Duplicate entry, ignoring: %s", \
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en); \
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x = invalid; \
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} \
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} \
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\
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if (x == invalid) \
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continue; \
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\
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*(xs + i) = x; \
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new_xs = realloc(xs, (++i + 1) * sizeof(type)); \
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if (new_xs) \
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xs = new_xs; \
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else \
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return -ENOMEM; \
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\
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*(xs + i) = invalid; \
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} \
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\
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free(*enums); \
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*enums = xs; \
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xs = NULL; \
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\
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return 0; \
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}
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