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/* |
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* libsysfs.h |
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* |
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* Header Definitions for libsysfs |
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* |
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* Copyright (C) IBM Corp. 2004-2005 |
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* |
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* This library is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* This library is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with this library; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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* |
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*/ |
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#ifndef _LIBSYSFS_H_ |
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#define _LIBSYSFS_H_ |
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|
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#include <sys/types.h> |
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#include <string.h> |
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|
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#define SYSFS_FSTYPE_NAME "sysfs" |
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#define SYSFS_PROC_MNTS "/proc/mounts" |
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#define SYSFS_BUS_NAME "bus" |
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#define SYSFS_CLASS_NAME "class" |
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#define SYSFS_BLOCK_NAME "block" |
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#define SYSFS_DEVICES_NAME "devices" |
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#define SYSFS_DRIVERS_NAME "drivers" |
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#define SYSFS_MODULE_NAME "module" |
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#define SYSFS_NAME_ATTRIBUTE "name" |
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#define SYSFS_MOD_PARM_NAME "parameters" |
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#define SYSFS_MOD_SECT_NAME "sections" |
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#define SYSFS_UNKNOWN "unknown" |
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#define SYSFS_PATH_ENV "SYSFS_PATH" |
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|
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#define SYSFS_PATH_MAX 256 |
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#define SYSFS_NAME_LEN 64 |
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#define SYSFS_BUS_ID_SIZE 32 |
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|
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/* mount path for sysfs, can be overridden by exporting SYSFS_PATH */ |
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#define SYSFS_MNT_PATH "/sys" |
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|
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enum sysfs_attribute_method { |
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SYSFS_METHOD_SHOW = 0x01, /* attr can be read by user */ |
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SYSFS_METHOD_STORE = 0x02, /* attr can be changed by user */ |
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}; |
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|
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/* |
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* NOTE: |
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* 1. We have the statically allocated "name" as the first element of all |
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* the structures. This feature is used in the "sorter" function for dlists |
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* 2. As is the case with attrlist |
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* 3. As is the case with path |
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*/ |
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struct sysfs_attribute { |
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char name[SYSFS_NAME_LEN]; |
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char path[SYSFS_PATH_MAX]; |
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char *value; |
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unsigned short len; /* value length */ |
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enum sysfs_attribute_method method; /* show and store */ |
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}; |
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|
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#ifdef __cplusplus |
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extern "C" { |
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#endif |
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|
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/* |
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* Function Prototypes |
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*/ |
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extern int sysfs_get_name_from_path(const char *path, char *name, size_t len); |
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|
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/* sysfs directory and file access */ |
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extern void sysfs_close_attribute(struct sysfs_attribute *sysattr); |
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extern struct sysfs_attribute *sysfs_open_attribute(const char *path); |
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extern int sysfs_read_attribute(struct sysfs_attribute *sysattr); |
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extern int sysfs_write_attribute(struct sysfs_attribute *sysattr, |
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const char *new_value, size_t len); |
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|
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#ifdef __cplusplus |
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} |
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#endif |
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|
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#endif /* _LIBSYSFS_H_ */ |
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