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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>
#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 */
};
#ifdef __cplusplus
extern "C" {
#endif
/*
* Function Prototypes
*/
extern int sysfs_get_name_from_path(const char *path, char *name, 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_write_attribute(struct sysfs_attribute *sysattr,
const char *new_value, size_t len);
#ifdef __cplusplus
}
#endif
#endif /* _LIBSYSFS_H_ */
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