mirror of
https://github.com/systemd/systemd.git
synced 2024-11-06 16:59:03 +03:00
8d8172514d
Here's a quick patch to: 1) Add an environment variable "SYSFS_PATH" that libsysfs will check for when getting mount point before searching system's sysfs mount point. 2) A quick fix to sysfs_get_link where the bug was. I have tested this out with libsysfs and with udev. I couldn't test with klibc because I haven't got the tree to build with klibc without my changes either. I made the link but get an error finding linux/linits.h. I will figure that out. Please have a look at the patch. If it's agreeable, please test it. I really want to add some generic path manipulation functions for the sysfs_get_link error, rather than my patch's hack. But, I haven't had time yet to do that. You really sounded like you needed this for testing, so I'm sending it out to you. I should probably add a function to set the env variable(?).
252 lines
9.1 KiB
C
252 lines
9.1 KiB
C
/*
|
|
* libsysfs.h
|
|
*
|
|
* Header Definitions for libsysfs
|
|
*
|
|
* Copyright (C) IBM Corp. 2003
|
|
*
|
|
* 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 "dlist.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_BLOCK_DIR "/block"
|
|
#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_UNKNOWN "unknown"
|
|
#define SYSFS_PATH_ENV "SYSFS_PATH"
|
|
|
|
/* Some "block" subsystem specific #defines */
|
|
#define SYSFS_QUEUE_NAME "queue"
|
|
#define SYSFS_IOSCHED_NAME "iosched"
|
|
|
|
#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 {
|
|
unsigned char *value;
|
|
unsigned short len; /* value length */
|
|
unsigned short method; /* show and store */
|
|
unsigned char name[SYSFS_NAME_LEN];
|
|
unsigned char path[SYSFS_PATH_MAX];
|
|
};
|
|
|
|
struct sysfs_link {
|
|
unsigned char name[SYSFS_NAME_LEN];
|
|
unsigned char path[SYSFS_PATH_MAX];
|
|
unsigned char target[SYSFS_PATH_MAX];
|
|
};
|
|
|
|
struct sysfs_directory {
|
|
struct dlist *subdirs;
|
|
struct dlist *links;
|
|
struct dlist *attributes;
|
|
unsigned char name[SYSFS_NAME_LEN];
|
|
unsigned char path[SYSFS_PATH_MAX];
|
|
};
|
|
|
|
struct sysfs_driver {
|
|
struct dlist *devices;
|
|
unsigned char name[SYSFS_NAME_LEN];
|
|
unsigned char path[SYSFS_PATH_MAX];
|
|
|
|
/* for internal use only */
|
|
struct sysfs_directory *directory;
|
|
};
|
|
|
|
struct sysfs_device {
|
|
struct sysfs_device *parent;
|
|
struct dlist *children;
|
|
unsigned char name[SYSFS_NAME_LEN];
|
|
unsigned char bus_id[SYSFS_NAME_LEN];
|
|
unsigned char path[SYSFS_PATH_MAX];
|
|
unsigned char driver_name[SYSFS_NAME_LEN];
|
|
|
|
/* for internal use only */
|
|
struct sysfs_directory *directory;
|
|
};
|
|
|
|
struct sysfs_root_device {
|
|
struct dlist *devices;
|
|
unsigned char name[SYSFS_NAME_LEN];
|
|
unsigned char path[SYSFS_PATH_MAX];
|
|
|
|
/* for internal use only */
|
|
struct sysfs_directory *directory;
|
|
};
|
|
|
|
struct sysfs_bus {
|
|
struct dlist *drivers;
|
|
struct dlist *devices;
|
|
unsigned char name[SYSFS_NAME_LEN];
|
|
unsigned char path[SYSFS_PATH_MAX];
|
|
|
|
/* internal use only */
|
|
struct sysfs_directory *directory;
|
|
};
|
|
|
|
struct sysfs_class_device {
|
|
struct sysfs_device *sysdevice; /* NULL if virtual */
|
|
struct sysfs_driver *driver; /* NULL if not implemented */
|
|
unsigned char name[SYSFS_NAME_LEN];
|
|
unsigned char path[SYSFS_PATH_MAX];
|
|
|
|
/* for internal use only */
|
|
struct sysfs_directory *directory;
|
|
};
|
|
|
|
struct sysfs_class {
|
|
struct dlist *devices;
|
|
unsigned char name[SYSFS_NAME_LEN];
|
|
unsigned char path[SYSFS_PATH_MAX];
|
|
|
|
/* for internal use only */
|
|
struct sysfs_directory *directory;
|
|
};
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/*
|
|
* Function Prototypes
|
|
*/
|
|
extern int sysfs_get_mnt_path(unsigned char *mnt_path, size_t len);
|
|
extern int sysfs_get_name_from_path(const unsigned char *path,
|
|
unsigned char *name, size_t len);
|
|
extern int sysfs_get_link(const unsigned char *path, unsigned char *target,
|
|
size_t len);
|
|
extern struct dlist *sysfs_open_subsystem_list(unsigned char *name);
|
|
extern struct dlist *sysfs_open_bus_devices_list(unsigned char *name);
|
|
extern void sysfs_close_list(struct dlist *list);
|
|
|
|
/* sysfs directory and file access */
|
|
extern void sysfs_close_attribute(struct sysfs_attribute *sysattr);
|
|
extern struct sysfs_attribute *sysfs_open_attribute(const unsigned char *path);
|
|
extern int sysfs_read_attribute(struct sysfs_attribute *sysattr);
|
|
extern int sysfs_read_attribute_value(const unsigned char *attrpath,
|
|
unsigned char *value, size_t vsize);
|
|
extern int sysfs_write_attribute(struct sysfs_attribute *sysattr,
|
|
const unsigned char *new_value, size_t len);
|
|
extern unsigned char *sysfs_get_value_from_attributes(struct dlist *attr,
|
|
const unsigned char * name);
|
|
extern void sysfs_close_directory(struct sysfs_directory *sysdir);
|
|
extern struct sysfs_directory *sysfs_open_directory(const unsigned char *path);
|
|
extern int sysfs_read_directory(struct sysfs_directory *sysdir);
|
|
extern int sysfs_read_all_subdirs(struct sysfs_directory *sysdir);
|
|
extern struct sysfs_directory *sysfs_get_subdirectory
|
|
(struct sysfs_directory *dir, unsigned char *subname);
|
|
extern void sysfs_close_link(struct sysfs_link *ln);
|
|
extern struct sysfs_link *sysfs_open_link(const unsigned char *lnpath);
|
|
extern struct sysfs_link *sysfs_get_directory_link(struct sysfs_directory *dir,
|
|
unsigned char *linkname);
|
|
extern struct sysfs_link *sysfs_get_subdirectory_link
|
|
(struct sysfs_directory *dir, unsigned char *linkname);
|
|
extern struct sysfs_attribute *sysfs_get_directory_attribute
|
|
(struct sysfs_directory *dir, unsigned char *attrname);
|
|
|
|
/* sysfs driver access */
|
|
extern void sysfs_close_driver(struct sysfs_driver *driver);
|
|
extern struct sysfs_driver *sysfs_open_driver(const unsigned char *path);
|
|
extern struct sysfs_attribute *sysfs_get_driver_attr
|
|
(struct sysfs_driver *drv, const unsigned char *name);
|
|
extern struct dlist *sysfs_get_driver_attributes(struct sysfs_driver *driver);
|
|
extern struct dlist *sysfs_get_driver_links(struct sysfs_driver *driver);
|
|
extern void sysfs_close_driver_by_name(struct sysfs_driver *driver);
|
|
extern struct sysfs_driver *sysfs_open_driver_by_name
|
|
(const unsigned char *drv_name, const unsigned char *bus, size_t bsize);
|
|
extern int sysfs_write_driver_attr(unsigned char *drv, unsigned char *attrib,
|
|
unsigned char *value, size_t len);
|
|
extern int sysfs_read_driver_attr(unsigned char *drv, unsigned char *attrib,
|
|
unsigned char *value, size_t len);
|
|
|
|
/* generic sysfs device access */
|
|
extern void sysfs_close_root_device(struct sysfs_root_device *root);
|
|
extern struct sysfs_root_device *sysfs_open_root_device
|
|
(const unsigned char *name);
|
|
extern void sysfs_close_device(struct sysfs_device *dev);
|
|
extern struct sysfs_device *sysfs_open_device(const unsigned char *path);
|
|
extern struct sysfs_attribute *sysfs_get_device_attr
|
|
(struct sysfs_device *dev, const unsigned char *name);
|
|
extern struct dlist *sysfs_get_device_attributes(struct sysfs_device *device);
|
|
extern struct sysfs_device *sysfs_open_device_by_id
|
|
(const unsigned char *bus_id, const unsigned char *bus, size_t bsize);
|
|
extern int sysfs_write_device_attr(unsigned char *dev, unsigned char *attrib,
|
|
unsigned char *value, size_t len);
|
|
extern int sysfs_read_device_attr(unsigned char *dev, unsigned char *attrib,
|
|
unsigned char *value, size_t len);
|
|
|
|
/* generic sysfs bus access */
|
|
extern void sysfs_close_bus(struct sysfs_bus *bus);
|
|
extern struct sysfs_bus *sysfs_open_bus(const unsigned char *name);
|
|
extern struct sysfs_device *sysfs_get_bus_device(struct sysfs_bus *bus,
|
|
unsigned char *id);
|
|
extern struct sysfs_driver *sysfs_get_bus_driver(struct sysfs_bus *bus,
|
|
unsigned char *drvname);
|
|
extern struct dlist *sysfs_get_bus_attributes(struct sysfs_bus *bus);
|
|
extern struct sysfs_attribute *sysfs_get_bus_attribute(struct sysfs_bus *bus,
|
|
unsigned char *attrname);
|
|
extern struct sysfs_device *sysfs_open_bus_device(unsigned char *busname,
|
|
unsigned char *dev_id);
|
|
extern int sysfs_find_device_bus(const unsigned char *dev_id,
|
|
unsigned char *busname, size_t bsize);
|
|
extern int sysfs_find_driver_bus(const unsigned char *driver,
|
|
unsigned char *busname, size_t bsize);
|
|
|
|
/* 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 unsigned char *path);
|
|
extern void sysfs_close_class(struct sysfs_class *cls);
|
|
extern struct sysfs_class *sysfs_open_class(const unsigned char *name);
|
|
extern struct sysfs_class_device *sysfs_get_class_device
|
|
(struct sysfs_class *class, unsigned char *name);
|
|
extern struct sysfs_class_device *sysfs_open_class_device_by_name
|
|
(const unsigned char *class, unsigned char *name);
|
|
extern struct dlist *sysfs_get_classdev_attributes
|
|
(struct sysfs_class_device *cdev);
|
|
extern int sysfs_find_device_class(const unsigned char *bus_id,
|
|
unsigned char *classname, size_t bsize);
|
|
extern struct sysfs_attribute *sysfs_get_classdev_attr
|
|
(struct sysfs_class_device *clsdev, const unsigned char *name);
|
|
extern int sysfs_write_classdev_attr(unsigned char *dev, unsigned char *attrib,
|
|
unsigned char *value, size_t len);
|
|
extern int sysfs_read_classdev_attr(unsigned char *dev, unsigned char *attrib,
|
|
unsigned char *value, size_t len);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* _LIBSYSFS_H_ */
|