[PATCH] big libsysfs diet (pre 2.0 version)

1 files changed, 36 insertions, 141 deletions

diff --git a/libsysfs/sysfs/libsysfs.h b/libsysfs/sysfs/libsysfs.h
index 29194f61a6..6140c3aecb 100644
--- a/libsysfs/sysfs/libsysfs.h
+++ b/libsysfs/sysfs/libsysfs.h
@@ -3,7 +3,7 @@
  *
  * Header Definitions for libsysfs
  *
- * Copyright (C) IBM Corp. 2003
+ * Copyright (C) IBM Corp. 2004-2005
  *
  *  This library is free software; you can redistribute it and/or
  *  modify it under the terms of the GNU Lesser General Public
@@ -27,27 +27,6 @@
 #include <string.h>
 #include "dlist.h"
 
-/* 
- * Defines to prevent buffer overruns
- */
-#define safestrcpy(to, from)	strncpy(to, from, sizeof(to)-1)
-#define safestrcat(to, from)	strncat(to, from, sizeof(to) - strlen(to)-1)
-
-#define safestrcpymax(to, from, max) \
-do { \
-	to[max-1] = '\0'; \
-	strncpy(to, from, max-1); \
-} while (0)
-
-#define safestrcatmax(to, from, max) \
-do { \
-	to[max-1] = '\0'; \
-	strncat(to, from, max - strlen(to)-1); \
-} while (0)
-
-/*
- * Generic #defines go here..
- */ 
 #define SYSFS_FSTYPE_NAME	"sysfs"
 #define SYSFS_PROC_MNTS		"/proc/mounts"
 #define SYSFS_BUS_NAME		"bus"
@@ -55,106 +34,92 @@ do { \
 #define SYSFS_BLOCK_NAME	"block"
 #define SYSFS_DEVICES_NAME	"devices"
 #define SYSFS_DRIVERS_NAME	"drivers"
+#define SYSFS_MODULE_NAME	"module"
 #define SYSFS_NAME_ATTRIBUTE	"name"
 #define SYSFS_UNKNOWN		"unknown"
 #define SYSFS_PATH_ENV		"SYSFS_PATH"
 
-#define SYSFS_PATH_MAX		255
-#define	SYSFS_NAME_LEN		50
-#define SYSFS_BUS_ID_SIZE	20
+#define SYSFS_PATH_MAX		256
+#define	SYSFS_NAME_LEN		64
+#define SYSFS_BUS_ID_SIZE	32
 
-#define SYSFS_METHOD_SHOW	0x01	/* attr can be read by user */
-#define SYSFS_METHOD_STORE	0x02	/* attr can be changed by user */
+enum sysfs_attribute_method {
+	SYSFS_METHOD_SHOW =	0x01,	/* attr can be read by user */
+	SYSFS_METHOD_STORE =	0x02,	/* attr can be changed by user */
+};
+
+/* NOTE: statically define mnt path for sysfs */
+#define SYSFS_MNT_PATH		"/sys"
 
 /*
- * NOTE: We have the statically allocated "name" as the first element of all 
+ * NOTE: 
+ * 1. We have the statically allocated "name" as the first element of all 
  * the structures. This feature is used in the "sorter" function for dlists
+ * 2. As is the case with attrlist
+ * 3. As is the case with path
  */
-
 struct sysfs_attribute {
 	char name[SYSFS_NAME_LEN];
 	char path[SYSFS_PATH_MAX];
 	char *value;
-	unsigned short len;		/* value length */
-	unsigned short method;		/* show and store */
-};
-
-struct sysfs_link {
-	char name[SYSFS_NAME_LEN];
-	char path[SYSFS_PATH_MAX];
-	char target[SYSFS_PATH_MAX];
-};
-
-struct sysfs_directory {
-	char name[SYSFS_NAME_LEN];
-	char path[SYSFS_PATH_MAX];
-
-	/* Private: for internal use only */
-	struct dlist *subdirs;	
-	struct dlist *links;		
-	struct dlist *attributes;
+	unsigned short len;			/* value length */
+	enum sysfs_attribute_method method;	/* show and store */
 };
 
 struct sysfs_driver {
 	char name[SYSFS_NAME_LEN];
 	char path[SYSFS_PATH_MAX];
+	struct dlist *attrlist;
+	char bus[SYSFS_NAME_LEN];
 
 	/* Private: for internal use only */
 	struct dlist *devices;
-	struct sysfs_directory *directory;	
 };
 
 struct sysfs_device {
 	char name[SYSFS_NAME_LEN];
+	char path[SYSFS_PATH_MAX];
+	struct dlist *attrlist;
 	char bus_id[SYSFS_NAME_LEN];
 	char bus[SYSFS_NAME_LEN];
 	char driver_name[SYSFS_NAME_LEN];
-	char path[SYSFS_PATH_MAX];
 
 	/* Private: for internal use only */
 	struct sysfs_device *parent;		
+	/* NOTE - we still don't populate this */
 	struct dlist *children;	
-	struct sysfs_directory *directory;	
-};
-
-struct sysfs_root_device {
-	char name[SYSFS_NAME_LEN];
-	char path[SYSFS_PATH_MAX];
-
-	/* Private: for internal use only */
-	struct dlist *devices;
-	struct sysfs_directory *directory;
 };
 
+/* NOTE: not used as of now */
 struct sysfs_bus {
 	char name[SYSFS_NAME_LEN];
 	char path[SYSFS_PATH_MAX];
+	struct dlist *attrlist;
 
 	/* Private: for internal use only */
 	struct dlist *drivers;
 	struct dlist *devices;
-	struct sysfs_directory *directory;	
 };
 
 struct sysfs_class_device {
 	char name[SYSFS_NAME_LEN];
-	char classname[SYSFS_NAME_LEN];
 	char path[SYSFS_PATH_MAX];
+	struct dlist *attrlist;
+	char classname[SYSFS_NAME_LEN];
 
 	/* Private: for internal use only */
 	struct sysfs_class_device *parent;	
 	struct sysfs_device *sysdevice;		/* NULL if virtual */
-	struct sysfs_driver *driver;		/* NULL if not implemented */
-	struct sysfs_directory *directory;	
 };
 
+/* NOTE: not used as of now */
 struct sysfs_class {
 	char name[SYSFS_NAME_LEN];
 	char path[SYSFS_PATH_MAX];
+	struct dlist *attrlist;
 
 	/* Private: for internal use only */
 	struct dlist *devices;
-	struct sysfs_directory *directory;	
 };
 
 #ifdef __cplusplus
@@ -171,43 +136,15 @@ extern int sysfs_path_is_dir(const char *path);
 extern int sysfs_path_is_link(const char *path);
 extern int sysfs_path_is_file(const char *path);
 extern int sysfs_get_link(const char *path, char *target, size_t len);
-extern struct dlist *sysfs_open_subsystem_list(char *name);
-extern struct dlist *sysfs_open_bus_devices_list(char *name);
+extern struct dlist *sysfs_open_directory_list(const char *path);
 extern void sysfs_close_list(struct dlist *list);
 
 /* sysfs directory and file access */
 extern void sysfs_close_attribute(struct sysfs_attribute *sysattr);
 extern struct sysfs_attribute *sysfs_open_attribute(const char *path);
 extern int sysfs_read_attribute(struct sysfs_attribute *sysattr);
-extern int sysfs_read_attribute_value(const char *attrpath, 
-		char *value, size_t vsize);
 extern int sysfs_write_attribute(struct sysfs_attribute *sysattr,
 		const char *new_value, size_t len);
-extern char *sysfs_get_value_from_attributes(struct dlist *attr, 
-		const char *name);
-extern int sysfs_refresh_dir_attributes(struct sysfs_directory *sysdir);
-extern int sysfs_refresh_dir_links(struct sysfs_directory *sysdir);
-extern int sysfs_refresh_dir_subdirs(struct sysfs_directory *sysdir);
-extern void sysfs_close_directory(struct sysfs_directory *sysdir);
-extern struct sysfs_directory *sysfs_open_directory(const char *path);
-extern int sysfs_read_dir_attributes(struct sysfs_directory *sysdir);
-extern int sysfs_read_dir_links(struct sysfs_directory *sysdir);
-extern int sysfs_read_dir_subdirs(struct sysfs_directory *sysdir);
-extern int sysfs_read_directory(struct sysfs_directory *sysdir);
-extern int sysfs_read_all_subdirs(struct sysfs_directory *sysdir);
-extern struct sysfs_directory *sysfs_get_subdirectory
-	(struct sysfs_directory *dir, char *subname);
-extern void sysfs_close_link(struct sysfs_link *ln);
-extern struct sysfs_link *sysfs_open_link(const char *lnpath);
-extern struct sysfs_link *sysfs_get_directory_link
-	(struct sysfs_directory *dir, char *linkname);
-extern struct sysfs_link *sysfs_get_subdirectory_link
-	(struct sysfs_directory *dir, char *linkname);
-extern struct sysfs_attribute *sysfs_get_directory_attribute
-	(struct sysfs_directory *dir, char *attrname);
-extern struct dlist *sysfs_get_dir_attributes(struct sysfs_directory *dir);
-extern struct dlist *sysfs_get_dir_links(struct sysfs_directory *dir);
-extern struct dlist *sysfs_get_dir_subdirs(struct sysfs_directory *dir);
 
 /* sysfs driver access */
 extern void sysfs_close_driver(struct sysfs_driver *driver);
@@ -218,19 +155,8 @@ extern struct sysfs_attribute *sysfs_get_driver_attr
 	(struct sysfs_driver *drv, const char *name);
 extern struct dlist *sysfs_get_driver_attributes(struct sysfs_driver *driver);
 extern struct dlist *sysfs_get_driver_devices(struct sysfs_driver *driver);
-extern struct dlist *sysfs_refresh_driver_devices(struct sysfs_driver *driver);
-extern struct dlist *sysfs_get_driver_links(struct sysfs_driver *driver);
-extern struct sysfs_device *sysfs_get_driver_device
-	(struct sysfs_driver *driver, const char *name);
-extern struct dlist *sysfs_refresh_driver_attributes
-	(struct sysfs_driver *driver);
-extern struct sysfs_attribute *sysfs_open_driver_attr
-	(const char *bus, const char *drv, const char *attrib);
 
 /* generic sysfs device access */
-extern void sysfs_close_root_device(struct sysfs_root_device *root);
-extern struct sysfs_root_device *sysfs_open_root_device(const char *name);
-extern struct dlist *sysfs_get_root_devices(struct sysfs_root_device *root);
 extern void sysfs_close_device_tree(struct sysfs_device *device);
 extern struct sysfs_device *sysfs_open_device_tree(const char *path);
 extern void sysfs_close_device(struct sysfs_device *dev);
@@ -241,27 +167,8 @@ extern struct sysfs_device *sysfs_open_device_path(const char *path);
 extern int sysfs_get_device_bus(struct sysfs_device *dev);
 extern struct sysfs_attribute *sysfs_get_device_attr
 	(struct sysfs_device *dev, const char *name);
-extern struct dlist *sysfs_get_device_attributes(struct sysfs_device *device);
-extern struct dlist *sysfs_refresh_device_attributes
-	(struct sysfs_device *device);
-extern struct sysfs_attribute *sysfs_open_device_attr(const char *bus, 
-		const char *bus_id, const char *attrib);
-
-/* generic sysfs bus access */
-extern void sysfs_close_bus(struct sysfs_bus *bus);
-extern struct sysfs_bus *sysfs_open_bus(const char *name);
-extern struct sysfs_device *sysfs_get_bus_device(struct sysfs_bus *bus, 
-		char *id);
-extern struct sysfs_driver *sysfs_get_bus_driver(struct sysfs_bus *bus,
-		char *drvname);
-extern struct dlist *sysfs_get_bus_drivers(struct sysfs_bus *bus);
-extern struct dlist *sysfs_get_bus_devices(struct sysfs_bus *bus);
-extern struct dlist *sysfs_get_bus_attributes(struct sysfs_bus *bus);
-extern struct dlist *sysfs_refresh_bus_attributes(struct sysfs_bus *bus);
-extern struct sysfs_attribute *sysfs_get_bus_attribute
-	(struct sysfs_bus *bus,	char *attrname);
-extern int sysfs_find_driver_bus(const char *driver, char *busname, 
-		size_t bsize);
+extern struct dlist *sysfs_get_device_attributes
+	(struct sysfs_device *dev);
 
 /* generic sysfs class access */
 extern void sysfs_close_class_device(struct sysfs_class_device *dev);
@@ -269,26 +176,14 @@ extern struct sysfs_class_device *sysfs_open_class_device_path
 	(const char *path);
 extern struct sysfs_class_device *sysfs_open_class_device
 	(const char *classname, const char *name);
-extern struct sysfs_device *sysfs_get_classdev_device
-	(struct sysfs_class_device *clsdev);
-extern struct sysfs_driver *sysfs_get_classdev_driver
-	(struct sysfs_class_device *clsdev);
 extern struct sysfs_class_device *sysfs_get_classdev_parent
 	(struct sysfs_class_device *clsdev);
-extern void sysfs_close_class(struct sysfs_class *cls);
-extern struct sysfs_class *sysfs_open_class(const char *name);
-extern struct dlist *sysfs_get_class_devices(struct sysfs_class *cls);
-extern struct sysfs_class_device *sysfs_get_class_device
-	(struct sysfs_class *cls, char *name);
-extern struct dlist *sysfs_get_classdev_attributes
-	(struct sysfs_class_device *cdev);
-extern struct dlist *sysfs_refresh_classdev_attributes
-	(struct sysfs_class_device *cdev);
 extern struct sysfs_attribute *sysfs_get_classdev_attr
 	(struct sysfs_class_device *clsdev, const char *name);
-extern struct sysfs_attribute *sysfs_open_classdev_attr
-	(const char *classname, const char *dev, 
-	 					const char *attrib); 
+extern struct dlist *sysfs_get_classdev_attributes
+	(struct sysfs_class_device *clsdev);
+extern struct sysfs_device *sysfs_get_classdev_device
+	(struct sysfs_class_device *clsdev);
 
 /**
  * sort_list: sorter function to keep list elements sorted in alphabetical