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- /*
- * libsysfs.h
- *
- * Header Definitions for libsysfs
- *
- * 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
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- */
- #ifndef _LIBSYSFS_H_
- #define _LIBSYSFS_H_
-
- #include <sys/types.h>
- #include <string.h>
- #include "dlist.h"
-
- #define SYSFS_FSTYPE_NAME "sysfs"
- #define SYSFS_PROC_MNTS "/proc/mounts"
- #define SYSFS_BUS_NAME "bus"
- #define SYSFS_CLASS_NAME "class"
- #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_MOD_PARM_NAME "parameters"
- #define SYSFS_MOD_SECT_NAME "sections"
- #define SYSFS_UNKNOWN "unknown"
- #define SYSFS_PATH_ENV "SYSFS_PATH"
-
- #define SYSFS_PATH_MAX 256
- #define SYSFS_NAME_LEN 64
- #define SYSFS_BUS_ID_SIZE 32
-
- /* mount path for sysfs, can be overridden by exporting SYSFS_PATH */
- #define SYSFS_MNT_PATH "/sys"
-
- 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:
- * 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 */
- 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 sysfs_module *module;
- struct dlist *devices;
- };
-
- 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 subsystem[SYSFS_NAME_LEN];
-
- /* Private: for internal use only */
- struct sysfs_device *parent;
- /* NOTE - we still don't populate this */
- struct dlist *children;
- };
-
- 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_class_device {
- char name[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_class {
- char name[SYSFS_NAME_LEN];
- char path[SYSFS_PATH_MAX];
- struct dlist *attrlist;
-
- /* Private: for internal use only */
- struct dlist *devices;
- };
-
- struct sysfs_module {
- char name[SYSFS_NAME_LEN];
- char path[SYSFS_PATH_MAX];
- struct dlist *attrlist;
- struct dlist *parmlist;
- struct dlist *sections;
- };
-
- #ifdef __cplusplus
- extern "C" {
- #endif
-
- /*
- * Function Prototypes
- */
- extern int sysfs_get_mnt_path(char *mnt_path, size_t len);
- extern int sysfs_remove_trailing_slash(char *path);
- extern int sysfs_get_name_from_path(const char *path, char *name, size_t len);
- 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_directory_list(const char *path);
- extern struct dlist *sysfs_open_link_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_write_attribute(struct sysfs_attribute *sysattr,
- const char *new_value, size_t len);
- extern struct sysfs_device *sysfs_read_dir_subdirs(const char *path);
- /* sysfs driver access */
- extern void sysfs_close_driver(struct sysfs_driver *driver);
- extern struct sysfs_driver *sysfs_open_driver
- (const char *bus_name, const char *drv_name);
- extern struct sysfs_driver *sysfs_open_driver_path(const char *path);
- 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 *drv);
- extern struct dlist *sysfs_get_driver_devices(struct sysfs_driver *drv);
- extern struct sysfs_module *sysfs_get_driver_module(struct sysfs_driver *drv);
-
- /* generic sysfs device access */
- 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);
- extern struct sysfs_device *sysfs_open_device
- (const char *bus, const char *bus_id);
- extern struct sysfs_device *sysfs_get_device_parent(struct sysfs_device *dev);
- 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 *dev);
-
- /* generic sysfs class access */
- extern void sysfs_close_class_device(struct sysfs_class_device *dev);
- 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_class_device *sysfs_get_classdev_parent
- (struct sysfs_class_device *clsdev);
- extern struct sysfs_attribute *sysfs_get_classdev_attr
- (struct sysfs_class_device *clsdev, const char *name);
- 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);
- extern void sysfs_close_class(struct sysfs_class *cls);
- extern struct sysfs_class *sysfs_open_class(const char *name);
- extern struct sysfs_class_device *sysfs_get_class_device
- (struct sysfs_class *cls, const char *name);
- extern struct dlist *sysfs_get_class_devices(struct sysfs_class *cls);
-
- /* 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 dlist *sysfs_get_bus_devices(struct sysfs_bus *bus);
- extern struct dlist *sysfs_get_bus_drivers(struct sysfs_bus *bus);
- extern struct sysfs_device *sysfs_get_bus_device
- (struct sysfs_bus *bus, const char *id);
- extern struct sysfs_driver *sysfs_get_bus_driver
- (struct sysfs_bus *bus, const char *drvname);
-
- /* generic sysfs module access */
- extern void sysfs_close_module(struct sysfs_module *module);
- extern struct sysfs_module *sysfs_open_module_path(const char *path);
- extern struct sysfs_module *sysfs_open_module(const char *name);
- extern struct dlist *sysfs_get_module_parms(struct sysfs_module *module);
- extern struct dlist *sysfs_get_module_sections(struct sysfs_module *module);
- extern struct dlist *sysfs_get_module_attributes(struct sysfs_module *module);
- extern struct sysfs_attribute *sysfs_get_module_attr
- (struct sysfs_module *module, const char *name);
- extern struct sysfs_attribute *sysfs_get_module_parm
- (struct sysfs_module *module, const char *parm);
- extern struct sysfs_attribute *sysfs_get_module_section
- (struct sysfs_module *module, const char *section);
-
- /**
- * sort_list: sorter function to keep list elements sorted in alphabetical
- * order. Just does a strncmp as you can see :)
- *
- * Returns 1 if less than 0 otherwise
- *
- * NOTE: We take care to have a statically allocated "name" as the first
- * lement of all libsysfs structures. Hence, this function will work
- * AS IS for _ALL_ the lists that have to be sorted.
- */
- static inline int sort_list(void *new_elem, void *old_elem)
- {
- return ((strncmp(((struct sysfs_attribute *)new_elem)->name,
- ((struct sysfs_attribute *)old_elem)->name,
- strlen(((struct sysfs_attribute *)new_elem)->name))) < 0 ? 1 : 0);
- }
-
-
- #ifdef __cplusplus
- }
- #endif
-
- #endif /* _LIBSYSFS_H_ */
-