/* $NetBSD: config.h,v 1.1.1.2 2009/12/02 00:26:28 haad Exp $ */ /* * 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; char *str; } v; struct config_value *next; /* for arrays */ }; struct config_node { 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 void *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); 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. */ 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, 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