4 * Header Definitions for libsysfs
6 * Copyright (C) IBM Corp. 2003
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with this library; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 #include <sys/types.h>
30 * Generic #defines go here..
32 #define SYSFS_FSTYPE_NAME "sysfs"
33 #define SYSFS_PROC_MNTS "/proc/mounts"
34 #define SYSFS_BUS_DIR "/bus"
35 #define SYSFS_BUS_NAME "bus"
36 #define SYSFS_CLASS_DIR "/class"
37 #define SYSFS_CLASS_NAME "class"
38 #define SYSFS_BLOCK_DIR "/block"
39 #define SYSFS_BLOCK_NAME "block"
40 #define SYSFS_DEVICES_DIR "/devices"
41 #define SYSFS_DEVICES_NAME "devices"
42 #define SYSFS_DRIVERS_DIR "/drivers"
43 #define SYSFS_DRIVERS_NAME "drivers"
44 #define SYSFS_NAME_ATTRIBUTE "name"
45 #define SYSFS_UNKNOWN "unknown"
46 #define SYSFS_PATH_ENV "SYSFS_PATH"
48 #define SYSFS_PATH_MAX 255
49 #define SYSFS_NAME_LEN 50
50 #define SYSFS_BUS_ID_SIZE 20
52 #define SYSFS_METHOD_SHOW 0x01 /* attr can be read by user */
53 #define SYSFS_METHOD_STORE 0x02 /* attr can be changed by user */
55 struct sysfs_attribute {
57 unsigned short len; /* value length */
58 unsigned short method; /* show and store */
59 unsigned char name[SYSFS_NAME_LEN];
60 unsigned char path[SYSFS_PATH_MAX];
64 unsigned char name[SYSFS_NAME_LEN];
65 unsigned char path[SYSFS_PATH_MAX];
66 unsigned char target[SYSFS_PATH_MAX];
69 struct sysfs_directory {
70 struct dlist *subdirs;
72 struct dlist *attributes;
73 unsigned char name[SYSFS_NAME_LEN];
74 unsigned char path[SYSFS_PATH_MAX];
78 struct dlist *devices;
79 unsigned char name[SYSFS_NAME_LEN];
80 unsigned char path[SYSFS_PATH_MAX];
82 /* for internal use only */
83 struct sysfs_directory *directory;
87 struct sysfs_device *parent;
88 struct dlist *children;
89 unsigned char name[SYSFS_NAME_LEN];
90 unsigned char bus_id[SYSFS_NAME_LEN];
91 unsigned char bus[SYSFS_NAME_LEN];
92 unsigned char driver_name[SYSFS_NAME_LEN];
93 unsigned char path[SYSFS_PATH_MAX];
95 /* for internal use only */
96 struct sysfs_directory *directory;
99 struct sysfs_root_device {
100 struct dlist *devices;
101 unsigned char name[SYSFS_NAME_LEN];
102 unsigned char path[SYSFS_PATH_MAX];
104 /* for internal use only */
105 struct sysfs_directory *directory;
109 struct dlist *drivers;
110 struct dlist *devices;
111 unsigned char name[SYSFS_NAME_LEN];
112 unsigned char path[SYSFS_PATH_MAX];
114 /* internal use only */
115 struct sysfs_directory *directory;
118 struct sysfs_class_device {
119 struct sysfs_device *sysdevice; /* NULL if virtual */
120 struct sysfs_driver *driver; /* NULL if not implemented */
121 unsigned char name[SYSFS_NAME_LEN];
122 unsigned char classname[SYSFS_NAME_LEN];
123 unsigned char path[SYSFS_PATH_MAX];
125 /* for internal use only */
126 struct sysfs_directory *directory;
130 struct dlist *devices;
131 unsigned char name[SYSFS_NAME_LEN];
132 unsigned char path[SYSFS_PATH_MAX];
134 /* for internal use only */
135 struct sysfs_directory *directory;
143 * Function Prototypes
145 extern int sysfs_trailing_slash(unsigned char *path);
146 extern int sysfs_get_mnt_path(unsigned char *mnt_path, size_t len);
147 extern int sysfs_get_name_from_path(const unsigned char *path,
148 unsigned char *name, size_t len);
149 extern int sysfs_get_link(const unsigned char *path, unsigned char *target,
151 extern struct dlist *sysfs_open_subsystem_list(unsigned char *name);
152 extern struct dlist *sysfs_open_bus_devices_list(unsigned char *name);
153 extern void sysfs_close_list(struct dlist *list);
155 /* sysfs directory and file access */
156 extern void sysfs_close_attribute(struct sysfs_attribute *sysattr);
157 extern struct sysfs_attribute *sysfs_open_attribute(const unsigned char *path);
158 extern int sysfs_read_attribute(struct sysfs_attribute *sysattr);
159 extern int sysfs_read_attribute_value(const unsigned char *attrpath,
160 unsigned char *value, size_t vsize);
161 extern int sysfs_write_attribute(struct sysfs_attribute *sysattr,
162 const unsigned char *new_value, size_t len);
163 extern unsigned char *sysfs_get_value_from_attributes(struct dlist *attr,
164 const unsigned char * name);
165 extern void sysfs_close_directory(struct sysfs_directory *sysdir);
166 extern struct sysfs_directory *sysfs_open_directory(const unsigned char *path);
167 extern int sysfs_read_directory(struct sysfs_directory *sysdir);
168 extern int sysfs_read_all_subdirs(struct sysfs_directory *sysdir);
169 extern struct sysfs_directory *sysfs_get_subdirectory
170 (struct sysfs_directory *dir, unsigned char *subname);
171 extern void sysfs_close_link(struct sysfs_link *ln);
172 extern struct sysfs_link *sysfs_open_link(const unsigned char *lnpath);
173 extern struct sysfs_link *sysfs_get_directory_link(struct sysfs_directory *dir,
174 unsigned char *linkname);
175 extern struct sysfs_link *sysfs_get_subdirectory_link
176 (struct sysfs_directory *dir, unsigned char *linkname);
177 extern struct sysfs_attribute *sysfs_get_directory_attribute
178 (struct sysfs_directory *dir, unsigned char *attrname);
180 /* sysfs driver access */
181 extern void sysfs_close_driver(struct sysfs_driver *driver);
182 extern struct sysfs_driver *sysfs_open_driver(const unsigned char *path);
183 extern struct sysfs_attribute *sysfs_get_driver_attr
184 (struct sysfs_driver *drv, const unsigned char *name);
185 extern struct dlist *sysfs_get_driver_attributes(struct sysfs_driver *driver);
186 extern struct dlist *sysfs_get_driver_links(struct sysfs_driver *driver);
187 extern void sysfs_close_driver_by_name(struct sysfs_driver *driver);
188 extern struct sysfs_driver *sysfs_open_driver_by_name
189 (const unsigned char *drv_name, const unsigned char *bus, size_t bsize);
190 extern struct sysfs_attribute *sysfs_open_driver_attr(const unsigned char *bus,
191 const unsigned char *drv, const unsigned char *attrib);
193 /* generic sysfs device access */
194 extern void sysfs_close_root_device(struct sysfs_root_device *root);
195 extern struct sysfs_root_device *sysfs_open_root_device
196 (const unsigned char *name);
197 extern void sysfs_close_device(struct sysfs_device *dev);
198 extern struct sysfs_device *sysfs_open_device(const unsigned char *path);
199 extern struct sysfs_attribute *sysfs_get_device_attr
200 (struct sysfs_device *dev, const unsigned char *name);
201 extern struct dlist *sysfs_get_device_attributes(struct sysfs_device *device);
202 extern struct sysfs_device *sysfs_open_device_by_id
203 (const unsigned char *bus_id, const unsigned char *bus, size_t bsize);
204 extern struct sysfs_attribute *sysfs_open_device_attr(const unsigned char *bus,
205 const unsigned char *bus_id, const unsigned char *attrib);
207 /* generic sysfs bus access */
208 extern void sysfs_close_bus(struct sysfs_bus *bus);
209 extern struct sysfs_bus *sysfs_open_bus(const unsigned char *name);
210 extern struct sysfs_device *sysfs_get_bus_device(struct sysfs_bus *bus,
212 extern struct sysfs_driver *sysfs_get_bus_driver(struct sysfs_bus *bus,
213 unsigned char *drvname);
214 extern struct dlist *sysfs_get_bus_attributes(struct sysfs_bus *bus);
215 extern struct sysfs_attribute *sysfs_get_bus_attribute(struct sysfs_bus *bus,
216 unsigned char *attrname);
217 extern struct sysfs_device *sysfs_open_bus_device(unsigned char *busname,
218 unsigned char *dev_id);
219 extern int sysfs_find_driver_bus(const unsigned char *driver,
220 unsigned char *busname, size_t bsize);
222 /* generic sysfs class access */
223 extern void sysfs_close_class_device(struct sysfs_class_device *dev);
224 extern struct sysfs_class_device *sysfs_open_class_device
225 (const unsigned char *path);
226 extern void sysfs_close_class(struct sysfs_class *cls);
227 extern struct sysfs_class *sysfs_open_class(const unsigned char *name);
228 extern struct sysfs_class_device *sysfs_get_class_device
229 (struct sysfs_class *class, unsigned char *name);
230 extern struct sysfs_class_device *sysfs_open_class_device_by_name
231 (const unsigned char *class, const unsigned char *name);
232 extern struct dlist *sysfs_get_classdev_attributes
233 (struct sysfs_class_device *cdev);
234 extern struct sysfs_attribute *sysfs_get_classdev_attr
235 (struct sysfs_class_device *clsdev, const unsigned char *name);
236 extern struct sysfs_attribute *sysfs_open_classdev_attr
237 (const unsigned char *classname, const unsigned char *dev,
238 const unsigned char *attrib);
244 #endif /* _LIBSYSFS_H_ */