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