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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
/*
* Ceph - scalable distributed file system
*
* Copyright (C) 2011 New Dream Network
*
* This is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software
* Foundation. See file COPYING.
*
*/
#ifndef CEPH_CONFUTILS_H
#define CEPH_CONFUTILS_H
#include <deque>
#include <map>
#include <set>
#include <string>
#include <string_view>
#include <vector>
#include "include/buffer_fwd.h"
/*
* Ceph configuration file support.
*
* This class loads an INI-style configuration from a file or bufferlist, and
* holds it in memory. In general, an INI configuration file is composed of
* sections, which contain key/value pairs. You can put comments on the end of
* lines by using either a hash mark (#) or the semicolon (;).
*
* You can get information out of ConfFile by calling get_key or by examining
* individual sections.
*
* This class could be extended to support modifying configuration files and
* writing them back out without too much difficulty. Currently, this is not
* implemented, and the file is read-only.
*/
struct conf_line_t {
conf_line_t() = default;
conf_line_t(const std::string& key, const std::string& val);
bool operator<(const conf_line_t& rhs) const;
std::string key;
std::string val;
};
std::ostream &operator<<(std::ostream& oss, const conf_line_t& line);
class conf_section_t : public std::set<conf_line_t> {
public:
conf_section_t() = default;
conf_section_t(const std::string& heading,
const std::vector<conf_line_t>& lines);
std::string heading;
friend std::ostream& operator<<(std::ostream& os, const conf_section_t&);
};
class ConfFile : public std::map<std::string, conf_section_t, std::less<>> {
using base_type = std::map<std::string, conf_section_t, std::less<>>;
public:
ConfFile()
: ConfFile{std::vector<conf_section_t>{}}
{}
ConfFile(const conf_line_t& line)
: ConfFile{{conf_section_t{"global", {line}}}}
{}
ConfFile(const std::vector<conf_section_t>& sections);
int parse_file(const std::string &fname, std::ostream *warnings);
int parse_bufferlist(ceph::bufferlist *bl, std::ostream *warnings);
bool parse_buffer(std::string_view buf, std::ostream* warning);
int read(std::string_view section, std::string_view key,
std::string &val) const;
static std::string normalize_key_name(std::string_view key);
// print warnings to os if any old-style section name is found
//
// consider a section name as old-style name if it starts with any of the
// given prefixes, but does not follow with a "."
void check_old_style_section_names(const std::vector<std::string>& prefixes,
std::ostream& os);
};
std::ostream &operator<<(std::ostream& oss, const ConfFile& cf);
#endif
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