X-Git-Url: https://git.archive.openwrt.org/?p=project%2Fuci.git;a=blobdiff_plain;f=uci.h;h=29cd07d0410e7e8c75d79717b87a402dfb2b844a;hp=ce3e12026a0f2a2c153eeaed81da46ac0b1c64bd;hb=4e55f6b3829420be74d35db2e55bafb18ac8ce21;hpb=9e56d37528e25c0759185e4c263c52a1eefaa9dd

diff --git a/uci.h b/uci.h
index ce3e120..29cd07d 100644
--- a/uci.h
+++ b/uci.h
@@ -2,9 +2,9 @@
  * libuci - Library for the Unified Configuration Interface
  * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
  *
- * this program 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
+ * This program 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
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -29,10 +29,13 @@
 #define UCI_DEBUG_TYPECAST
 #endif
 
+#include <stdbool.h>
 #include <setjmp.h>
 #include <stdio.h>
 
 #define UCI_CONFDIR "/etc/config"
+#define UCI_SAVEDIR "/tmp/.uci"
+#define UCI_FILEMODE	0600
 
 enum
 {
@@ -42,14 +45,16 @@ enum
 	UCI_ERR_NOTFOUND,
 	UCI_ERR_IO,
 	UCI_ERR_PARSE,
+	UCI_ERR_DUPLICATE,
 	UCI_ERR_UNKNOWN,
 	UCI_ERR_LAST
 };
 
+struct uci_list;
 struct uci_list
 {
-	void *next;
-	void *prev;
+	struct uci_list *next;
+	struct uci_list *prev;
 };
 
 struct uci_element;
@@ -57,10 +62,25 @@ struct uci_package;
 struct uci_section;
 struct uci_option;
 struct uci_history;
+struct uci_context;
+struct uci_backend;
 struct uci_parse_context;
 
 
 /**
+ * uci_parse_tuple: Parse an uci tuple
+ * @ctx: uci context
+ * @str: input string
+ * @package: output package pointer
+ * @section: output section pointer
+ * @option: output option pointer
+ * @value: output value pointer
+ *
+ * format: <package>[.<section>[.<option>]][=<value>]
+ */
+extern int uci_parse_tuple(struct uci_context *ctx, char *str, char **package, char **section, char **option, char **value);
+
+/**
  * uci_alloc_context: Allocate a new uci context
  */
 extern struct uci_context *uci_alloc_context(void);
@@ -83,18 +103,21 @@ extern void uci_perror(struct uci_context *ctx, const char *str);
  * @stream: file stream to import from
  * @name: (optional) assume the config has the given name
  * @package: (optional) store the last parsed config package in this variable
+ * @single: ignore the 'package' keyword and parse everything into a single package
  *
  * the name parameter is for config files that don't explicitly use the 'package <...>' keyword
+ * if 'package' points to a non-null struct pointer, enable history tracking and merge 
  */
-extern int uci_import(struct uci_context *ctx, FILE *stream, const char *name, struct uci_package **package);
+extern int uci_import(struct uci_context *ctx, FILE *stream, const char *name, struct uci_package **package, bool single);
 
 /**
  * uci_export: Export one or all uci config packages
  * @ctx: uci context
  * @stream: output stream
  * @package: (optional) uci config package to export
+ * @header: include the package header
  */
-extern int uci_export(struct uci_context *ctx, FILE *stream, struct uci_package *package);
+extern int uci_export(struct uci_context *ctx, FILE *stream, struct uci_package *package, bool header);
 
 /**
  * uci_load: Parse an uci config file and store it in the uci context
@@ -109,43 +132,173 @@ extern int uci_load(struct uci_context *ctx, const char *name, struct uci_packag
  * uci_unload: Unload a config file from the uci context
  *
  * @ctx: uci context
- * @name: name of the config file
+ * @package: pointer to the uci_package struct
  */
-extern int uci_unload(struct uci_context *ctx, const char *name);
-
-/**
- * uci_cleanup: Clean up after an error
- *
- * @ctx: uci context
- */
-extern int uci_cleanup(struct uci_context *ctx);
+extern int uci_unload(struct uci_context *ctx, struct uci_package *p);
 
 /**
  * uci_lookup: Look up an uci element
  *
  * @ctx: uci context
  * @res: where to store the result
- * @package: config package
+ * @package: uci_package struct 
  * @section: config section (optional)
  * @option: option to search for (optional)
  *
  * If section is omitted, then a pointer to the config package is returned
  * If option is omitted, then a pointer to the config section is returned
  */
-extern int uci_lookup(struct uci_context *ctx, struct uci_element **res, char *package, char *section, char *option);
+extern int uci_lookup(struct uci_context *ctx, struct uci_element **res, struct uci_package *package, char *section, char *option);
+
+/**
+ * uci_add_section: Add an unnamed section
+ * @ctx: uci context
+ * @p: package to add the section to
+ * @type: section type
+ * @res: pointer to store a reference to the new section in
+ */
+extern int uci_add_section(struct uci_context *ctx, struct uci_package *p, char *type, struct uci_section **res);
+
+/**
+ * uci_set_element_value: Replace an element's value with a new one
+ * @ctx: uci context
+ * @element: pointer to an uci_element struct pointer
+ * @value: new value
+ * 
+ * Only valid for uci_option and uci_section. Will replace the type string
+ * when used with an uci_section
+ */
+extern int uci_set_element_value(struct uci_context *ctx, struct uci_element **element, char *value);
+
+/**
+ * uci_set: Set an element's value; create the element if necessary
+ * @ctx: uci context
+ * @package: package name
+ * @section: section name
+ * @option: option name
+ * @value: value (option) or type (section)
+ * @result: store the updated element in this variable (optional)
+ */
+extern int uci_set(struct uci_context *ctx, struct uci_package *p, char *section, char *option, char *value, struct uci_element **result);
+
+/**
+ * uci_rename: Rename an element
+ * @ctx: uci context
+ * @package: package name
+ * @section: section name
+ * @option: option name
+ * @name: new name
+ */
+extern int uci_rename(struct uci_context *ctx, struct uci_package *p, char *section, char *option, char *name);
+
+/**
+ * uci_delete_element: Delete a section or option
+ * @ctx: uci context
+ * @e: element (section or option)
+ */
+extern int uci_delete_element(struct uci_context *ctx, struct uci_element *e);
+
+/**
+ * uci_delete: Delete a section or option
+ * @ctx: uci context
+ * @p: uci package
+ * @section: section name
+ * @option: option name (optional)
+ */
+extern int uci_delete(struct uci_context *ctx, struct uci_package *p, char *section, char *option);
+
+/**
+ * uci_save: save change history for a package
+ * @ctx: uci context
+ * @p: uci_package struct
+ */
+extern int uci_save(struct uci_context *ctx, struct uci_package *p);
+
+/**
+ * uci_commit: commit changes to a package
+ * @ctx: uci context
+ * @p: uci_package struct pointer
+ * @overwrite: overwrite existing config data and flush history
+ *
+ * committing may reload the whole uci_package data,
+ * the supplied pointer is updated accordingly
+ */
+extern int uci_commit(struct uci_context *ctx, struct uci_package **p, bool overwrite);
 
 /**
  * uci_list_configs: List available uci config files
+ * @ctx: uci context
  *
+ * caller is responsible for freeing the allocated memory behind list
+ */
+extern int uci_list_configs(struct uci_context *ctx, char ***list);
+
+/** 
+ * uci_set_savedir: override the default history save directory
+ * @ctx: uci context
+ * @dir: directory name
+ */
+extern int uci_set_savedir(struct uci_context *ctx, const char *dir);
+
+/** 
+ * uci_set_savedir: override the default config storage directory
  * @ctx: uci context
+ * @dir: directory name
  */
-extern char **uci_list_configs(struct uci_context *ctx);
+extern int uci_set_confdir(struct uci_context *ctx, const char *dir);
+
+/**
+ * uci_add_history_path: add a directory to the search path for change history files
+ * @ctx: uci context
+ * @dir: directory name
+ *
+ * This function allows you to add directories, which contain 'overlays'
+ * for the active config, that will never be committed.
+ */
+extern int uci_add_history_path(struct uci_context *ctx, const char *dir);
+
+/**
+ * uci_revert: revert all changes to a config item
+ * @ctx: uci context
+ * @p: pointer to a uci_package struct ptr (will be replaced by the revert)
+ * @section: section name (optional)
+ * @option option name (optional)
+ */
+extern int uci_revert(struct uci_context *ctx, struct uci_package **p, char *section, char *option);
+
+/**
+ * uci_parse_argument: parse a shell-style argument, with an arbitrary quoting style
+ * @ctx: uci context
+ * @stream: input stream
+ * @str: pointer to the current line (use NULL for parsing the next line)
+ * @result: pointer for the result
+ */
+extern int uci_parse_argument(struct uci_context *ctx, FILE *stream, char **str, char **result);
+
+/**
+ * uci_set_backend: change the default backend
+ * @ctx: uci context
+ * @name: name of the backend
+ *
+ * The default backend is "file", which uses /etc/config for config storage
+ */
+extern int uci_set_backend(struct uci_context *ctx, const char *name);
 
 /* UCI data structures */
 enum uci_type {
-	uci_type_package = 0,
-	uci_type_section = 1,
-	uci_type_option = 2
+	UCI_TYPE_HISTORY = 0,
+	UCI_TYPE_PACKAGE = 1,
+	UCI_TYPE_SECTION = 2,
+	UCI_TYPE_OPTION = 3,
+	UCI_TYPE_PATH = 4,
+	UCI_TYPE_BACKEND = 5,
+};
+
+enum uci_flags {
+	UCI_FLAG_STRICT =        (1 << 0), /* strict mode for the parser */
+	UCI_FLAG_PERROR =        (1 << 1), /* print parser error messages */
+	UCI_FLAG_EXPORT_NAME =   (1 << 2), /* when exporting, name unnamed sections */
+	UCI_FLAG_SAVED_HISTORY = (1 << 3), /* store the saved history in memory as well */
 };
 
 struct uci_element
@@ -155,6 +308,14 @@ struct uci_element
 	char *name;
 };
 
+struct uci_backend
+{
+	struct uci_element e;
+	char **(*list_configs)(struct uci_context *ctx);
+	struct uci_package *(*load)(struct uci_context *ctx, const char *name);
+	void (*commit)(struct uci_context *ctx, struct uci_package **p, bool overwrite);
+};
+
 struct uci_context
 {
 	/* list of config packages */
@@ -163,25 +324,24 @@ struct uci_context
 	/* parser context, use for error handling only */
 	struct uci_parse_context *pctx;
 
-	/* private: */
-	int errno;
-	jmp_buf trap;
-	char *buf;
-	int bufsz;
-};
+	/* backend for import and export */
+	struct uci_backend *backend;
+	struct uci_list backends;
 
-struct uci_parse_context
-{
-	/* error context */
-	const char *reason;
-	int line;
-	int byte;
+	/* uci runtime flags */
+	enum uci_flags flags;
+
+	char *confdir;
+	char *savedir;
+
+	/* search path for history files */
+	struct uci_list history_path;
 
 	/* private: */
-	struct uci_package *package;
-	struct uci_section *section;
-	FILE *file;
-	const char *name;
+	int errno;
+	const char *func;
+	jmp_buf trap;
+	bool internal;
 	char *buf;
 	int bufsz;
 };
@@ -191,8 +351,15 @@ struct uci_package
 	struct uci_element e;
 	struct uci_list sections;
 	struct uci_context *ctx;
+	bool has_history;
+	char *path;
+
 	/* private: */
+	struct uci_backend *backend;
+	void *priv;
 	int n_section;
+	struct uci_list history;
+	struct uci_list saved_history;
 };
 
 struct uci_section
@@ -200,6 +367,7 @@ struct uci_section
 	struct uci_element e;
 	struct uci_list options;
 	struct uci_package *package;
+	bool anonymous;
 	char *type;
 };
 
@@ -213,21 +381,30 @@ struct uci_option
 enum uci_command {
 	UCI_CMD_ADD,
 	UCI_CMD_REMOVE,
-	UCI_CMD_CHANGE
+	UCI_CMD_CHANGE,
+	UCI_CMD_RENAME
 };
 
 struct uci_history
 {
-	struct uci_list list;
+	struct uci_element e;
 	enum uci_command cmd;
-	union {
-		struct uci_element element;
-		struct uci_package package;
-		struct uci_section section;
-		struct uci_option option;
-	} data;
+	char *section;
+	char *value;
 };
 
+#define UCI_BACKEND(_var, _name, ...)	\
+struct uci_backend _var = {		\
+	.e.list = {			\
+		.next = &_var.e.list,	\
+		.prev = &_var.e.list,	\
+	},				\
+	.e.name = _name,		\
+	.e.type = UCI_TYPE_BACKEND,	\
+	__VA_ARGS__			\
+}
+
+
 /* linked list handling */
 #ifndef offsetof
 #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
@@ -248,9 +425,6 @@ struct uci_history
  * @_type: config, section or option
  * @_ptr: pointer to the uci_list struct
  */
-#define element_to(type, ptr) \
-	container_of(ptr, struct uci_ ## type, e)
-
 #define list_to_element(ptr) \
 	container_of(ptr, struct uci_element, list)
 
@@ -286,15 +460,27 @@ struct uci_history
 		&_ptr->list != (_list);			\
 		_ptr = _tmp, _tmp = list_to_element(_ptr->list.next))
 
-/* returns true if a list is empty */
+/**
+ * uci_list_empty: returns true if a list is empty
+ * @list: list head
+ */
 #define uci_list_empty(list) ((list)->next == (list))
 
+/* wrappers for dynamic type handling */
+#define uci_type_backend UCI_TYPE_BACKEND
+#define uci_type_history UCI_TYPE_HISTORY
+#define uci_type_package UCI_TYPE_PACKAGE
+#define uci_type_section UCI_TYPE_SECTION
+#define uci_type_option UCI_TYPE_OPTION
+
 /* element typecasting */
 #ifdef UCI_DEBUG_TYPECAST
 static const char *uci_typestr[] = {
+	[uci_type_backend] = "backend",
+	[uci_type_history] = "history",
 	[uci_type_package] = "package",
 	[uci_type_section] = "section",
-	[uci_type_option] = "option"
+	[uci_type_option] = "option",
 };
 
 static void uci_typecast_error(int from, int to)
@@ -311,11 +497,15 @@ static void uci_typecast_error(int from, int to)
 		return (struct uci_ ## _type *) e; \
 	}
 
+BUILD_CAST(backend)
+BUILD_CAST(history)
 BUILD_CAST(package)
 BUILD_CAST(section)
 BUILD_CAST(option)
 
 #else
+#define uci_to_backend(ptr) container_of(ptr, struct uci_backend, e)
+#define uci_to_history(ptr) container_of(ptr, struct uci_history, e)
 #define uci_to_package(ptr) container_of(ptr, struct uci_package, e)
 #define uci_to_section(ptr) container_of(ptr, struct uci_section, e)
 #define uci_to_option(ptr)  container_of(ptr, struct uci_option, e)