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/*
* libsysfs.h
*
* Header Definitions for libsysfs
*
* Copyright (C) 2003 International Business Machines, Inc.
*
* 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>
/*
* Generic #defines go here..
*/
#define SYSFS_FSTYPE_NAME "sysfs"
#define SYSFS_PROC_MNTS "/proc/mounts"
#define SYSFS_BUS_DIR "/bus"
#define SYSFS_CLASS_DIR "/class"
#define SYSFS_DEVICES_DIR "/devices"
#define SYSFS_DEVICES_NAME "devices"
#define SYSFS_DRIVERS_DIR "/drivers"
#define SYSFS_DRIVERS_NAME "drivers"
#define SYSFS_NAME_ATTRIBUTE "name"
#define SYSFS_PATH_MAX 255
#define SYSFS_NAME_LEN 50
#define SYSFS_BUS_ID_SIZE 20
#define SYSFS_METHOD_SHOW 0x01 /* attr can be read by user */
#define SYSFS_METHOD_STORE 0x02 /* attr can be changed by user */
struct sysfs_attribute {
struct sysfs_attribute *next;
char path[SYSFS_PATH_MAX];
char *value;
unsigned short len; /* value length */
unsigned short method; /* show and store */
};
struct sysfs_link {
struct sysfs_link *next;
char name[SYSFS_NAME_LEN];
char target[SYSFS_PATH_MAX];
};
struct sysfs_directory {
struct sysfs_directory *next;
char path[SYSFS_PATH_MAX];
struct sysfs_directory *subdirs;
struct sysfs_link *links;
struct sysfs_attribute *attributes;
};
struct sysfs_driver {
struct sysfs_driver *next;
char name[SYSFS_NAME_LEN];
struct sysfs_directory *directory;
struct sysfs_device *device;
};
struct sysfs_device {
struct sysfs_device *next;
char name[SYSFS_NAME_LEN];
char bus_id[SYSFS_NAME_LEN];
struct sysfs_driver *driver;
struct sysfs_directory *directory;
struct sysfs_device *parent;
struct sysfs_device *children;
};
struct sysfs_bus {
struct sysfs_bus *next;
char name[SYSFS_NAME_LEN];
struct sysfs_directory *directory;
struct sysfs_driver *drivers;
struct sysfs_device *devices;
};
struct sysfs_class_device {
struct sysfs_class_device *next;
char name[SYSFS_NAME_LEN];
struct sysfs_directory *directory;
struct sysfs_device *sysdevice; /* NULL if virtual */
struct sysfs_driver *driver; /* NULL if not implemented */
};
struct sysfs_class {
struct sysfs_class *next;
char name[SYSFS_NAME_LEN];
struct sysfs_directory *directory;
struct sysfs_class_device *devices;
};
#ifdef __cplusplus
extern "C" {
#endif
/*
* Function Prototypes
*/
extern int sysfs_get_mnt_path(char *mnt_path, size_t len);
extern int sysfs_get_name_from_path(const char *path, char *name, size_t len);
extern int sysfs_get_link(const char *path, char *target, size_t len);
/* 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 char *sysfs_get_value_from_attributes(struct sysfs_attribute *attr,
const char * name);
extern void sysfs_close_directory(struct sysfs_directory *sysdir);
extern struct sysfs_directory *sysfs_open_directory(const char *path);
extern int sysfs_read_directory(struct sysfs_directory *sysdir);
extern void sysfs_close_link(struct sysfs_link *ln);
extern struct sysfs_link *sysfs_open_link(const char *lnpath);
/* sysfs driver access */
extern void sysfs_close_driver(struct sysfs_driver *driver);
extern struct sysfs_driver *sysfs_open_driver(const char *path);
/* generic sysfs device access */
extern void sysfs_close_device(struct sysfs_device *dev);
extern void sysfs_close_device_tree(struct sysfs_device *dev);
extern struct sysfs_device *sysfs_open_device(const char *path);
extern struct sysfs_device *sysfs_open_device_tree(const char *path);
extern struct sysfs_attribute *sysfs_get_device_attr
(struct sysfs_device *dev, const char *name);
/* generic sysfs bus access */
extern void sysfs_close_bus(struct sysfs_bus *bus);
extern struct sysfs_bus *sysfs_open_bus(const char *name);
/* generic sysfs class access */
extern void sysfs_close_class_device(struct sysfs_class_device *dev);
extern struct sysfs_class_device *sysfs_open_class_device(const char *path);
extern void sysfs_close_class(struct sysfs_class *cls);
extern struct sysfs_class *sysfs_open_class(const char *name);
#ifdef __cplusplus
}
#endif
#endif /* _LIBSYSFS_H_ */
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