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/*
* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
*
* This file is part of LVM2.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU Lesser General Public License v.2.1.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef _LVM_CONFIG_H
#define _LVM_CONFIG_H
#include "lvm-types.h"
struct device;
struct cmd_context;
enum {
CFG_STRING,
CFG_FLOAT,
CFG_INT,
CFG_EMPTY_ARRAY
};
struct config_value {
int type;
union {
int64_t i;
float r;
const char *str;
} v;
struct config_value *next; /* for arrays */
};
struct config_node {
const char *key;
struct config_node *parent, *sib, *child;
struct config_value *v;
};
struct config_tree {
struct config_node *root;
};
struct config_tree_list {
struct dm_list list;
struct config_tree *cft;
};
struct config_tree *create_config_tree(const char *filename, int keep_open);
struct config_tree *create_config_tree_from_string(struct cmd_context *cmd,
const char *config_settings);
int override_config_tree_from_string(struct cmd_context *cmd,
const char *config_settings);
void destroy_config_tree(struct config_tree *cft);
typedef uint32_t (*checksum_fn_t) (uint32_t initial, const uint8_t *buf, uint32_t size);
int read_config_fd(struct config_tree *cft, struct device *dev,
off_t offset, size_t size, off_t offset2, size_t size2,
checksum_fn_t checksum_fn, uint32_t checksum);
int read_config_file(struct config_tree *cft);
int write_config_file(struct config_tree *cft, const char *file,
int argc, char **argv);
typedef int (*putline_fn)(const char *line, void *baton);
int write_config_node(const struct config_node *cn, putline_fn putline, void *baton);
time_t config_file_timestamp(struct config_tree *cft);
int config_file_changed(struct config_tree *cft);
int merge_config_tree(struct cmd_context *cmd, struct config_tree *cft,
struct config_tree *newdata);
const struct config_node *find_config_node(const struct config_node *cn,
const char *path);
const char *find_config_str(const struct config_node *cn, const char *path,
const char *fail);
int find_config_int(const struct config_node *cn, const char *path, int fail);
float find_config_float(const struct config_node *cn, const char *path,
float fail);
/*
* These versions check an override tree, if present, first.
*/
const struct config_node *find_config_tree_node(struct cmd_context *cmd,
const char *path);
const char *find_config_tree_str(struct cmd_context *cmd,
const char *path, const char *fail);
int find_config_tree_int(struct cmd_context *cmd, const char *path,
int fail);
float find_config_tree_float(struct cmd_context *cmd, const char *path,
float fail);
/*
* Understands (0, ~0), (y, n), (yes, no), (on,
* off), (true, false).
*/
int find_config_bool(const struct config_node *cn, const char *path, int fail);
int find_config_tree_bool(struct cmd_context *cmd, const char *path, int fail);
int get_config_uint32(const struct config_node *cn, const char *path,
uint32_t *result);
int get_config_uint64(const struct config_node *cn, const char *path,
uint64_t *result);
int get_config_str(const struct config_node *cn, const char *path,
const char **result);
unsigned maybe_config_section(const char *str, unsigned len);
const char *config_parent_name(const struct config_node *n);
struct config_node *clone_config_node(struct dm_pool *mem, const struct config_node *cn,
int siblings);
#endif
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