/* * 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_ */