1 /* $NetBSD: config.h,v 1.1.1.2 2009/12/02 00:26:28 haad Exp $ */ 2 3 /* 4 * Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved. 5 * Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved. 6 * 7 * This file is part of LVM2. 8 * 9 * This copyrighted material is made available to anyone wishing to use, 10 * modify, copy, or redistribute it subject to the terms and conditions 11 * of the GNU Lesser General Public License v.2.1. 12 * 13 * You should have received a copy of the GNU Lesser General Public License 14 * along with this program; if not, write to the Free Software Foundation, 15 * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 16 */ 17 18 #ifndef _LVM_CONFIG_H 19 #define _LVM_CONFIG_H 20 21 #include "lvm-types.h" 22 23 struct device; 24 struct cmd_context; 25 26 enum { 27 CFG_STRING, 28 CFG_FLOAT, 29 CFG_INT, 30 CFG_EMPTY_ARRAY 31 }; 32 33 struct config_value { 34 int type; 35 union { 36 int64_t i; 37 float r; 38 char *str; 39 } v; 40 struct config_value *next; /* for arrays */ 41 }; 42 43 struct config_node { 44 char *key; 45 struct config_node *parent, *sib, *child; 46 struct config_value *v; 47 }; 48 49 struct config_tree { 50 struct config_node *root; 51 }; 52 53 struct config_tree_list { 54 struct dm_list list; 55 struct config_tree *cft; 56 }; 57 58 struct config_tree *create_config_tree(const char *filename, int keep_open); 59 struct config_tree *create_config_tree_from_string(struct cmd_context *cmd, 60 const char *config_settings); 61 int override_config_tree_from_string(struct cmd_context *cmd, 62 const char *config_settings); 63 void destroy_config_tree(struct config_tree *cft); 64 65 typedef uint32_t (*checksum_fn_t) (uint32_t initial, const void *buf, uint32_t size); 66 67 int read_config_fd(struct config_tree *cft, struct device *dev, 68 off_t offset, size_t size, off_t offset2, size_t size2, 69 checksum_fn_t checksum_fn, uint32_t checksum); 70 71 int read_config_file(struct config_tree *cft); 72 int write_config_file(struct config_tree *cft, const char *file, 73 int argc, char **argv); 74 75 typedef int (*putline_fn)(const char *line, void *baton); 76 int write_config_node(const struct config_node *cn, putline_fn putline, void *baton); 77 78 time_t config_file_timestamp(struct config_tree *cft); 79 int config_file_changed(struct config_tree *cft); 80 int merge_config_tree(struct cmd_context *cmd, struct config_tree *cft, 81 struct config_tree *newdata); 82 83 struct config_node *find_config_node(const struct config_node *cn, 84 const char *path); 85 const char *find_config_str(const struct config_node *cn, const char *path, 86 const char *fail); 87 int find_config_int(const struct config_node *cn, const char *path, int fail); 88 float find_config_float(const struct config_node *cn, const char *path, 89 float fail); 90 91 /* 92 * These versions check an override tree, if present, first. 93 */ 94 struct config_node *find_config_tree_node(struct cmd_context *cmd, 95 const char *path); 96 const char *find_config_tree_str(struct cmd_context *cmd, 97 const char *path, const char *fail); 98 int find_config_tree_int(struct cmd_context *cmd, const char *path, 99 int fail); 100 float find_config_tree_float(struct cmd_context *cmd, const char *path, 101 float fail); 102 103 /* 104 * Understands (0, ~0), (y, n), (yes, no), (on, 105 * off), (true, false). 106 */ 107 int find_config_bool(const struct config_node *cn, const char *path, int fail); 108 int find_config_tree_bool(struct cmd_context *cmd, const char *path, int fail); 109 110 int get_config_uint32(const struct config_node *cn, const char *path, 111 uint32_t *result); 112 113 int get_config_uint64(const struct config_node *cn, const char *path, 114 uint64_t *result); 115 116 int get_config_str(const struct config_node *cn, const char *path, 117 char **result); 118 119 unsigned maybe_config_section(const char *str, unsigned len); 120 121 const char *config_parent_name(const struct config_node *n); 122 123 struct config_node *clone_config_node(struct dm_pool *mem, const struct config_node *cn, 124 int siblings); 125 #endif 126