#define _LIBSYSFS_H_
#include <sys/types.h>
+#include <string.h>
+
+/*
+ * Defines to prevent buffer overruns
+ */
+#define safestrcpy(to, from) strncpy(to, from, sizeof(to)-1)
+#define safestrcat(to, from) strncat(to, from, sizeof(to) - strlen(to)-1)
+
+#define safestrncpy(to, from, maxsize) \
+do { \
+ to[maxsize-1] = '\0'; \
+ strncpy(to, from, maxsize-1); \
+} while (0)
+
+#define safestrncat(to, from, maxsize) \
+do { \
+ to[maxsize-1] = '\0'; \
+ strncat(to, from, maxsize - strlen(to)-1); \
+} while (0)
/*
* Generic #defines go here..
#define SYSFS_METHOD_SHOW 0x01 /* attr can be read by user */
#define SYSFS_METHOD_STORE 0x02 /* attr can be changed by user */
-struct dlist;
+/*
+ * NOTE: We have the statically allocated "name" as the first element of all
+ * the structures. This feature is used in the "sorter" function for dlists
+ */
struct sysfs_attribute {
- unsigned char *value;
+ char name[SYSFS_NAME_LEN];
+ char path[SYSFS_PATH_MAX];
+ 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];
+ char name[SYSFS_NAME_LEN];
+ char path[SYSFS_PATH_MAX];
+ char target[SYSFS_PATH_MAX];
};
struct sysfs_directory {
- unsigned char name[SYSFS_NAME_LEN];
- unsigned char path[SYSFS_PATH_MAX];
+ char name[SYSFS_NAME_LEN];
+ char path[SYSFS_PATH_MAX];
/* Private: for internal use only */
struct dlist *subdirs;
};
struct sysfs_driver {
- unsigned char name[SYSFS_NAME_LEN];
- unsigned char path[SYSFS_PATH_MAX];
+ char name[SYSFS_NAME_LEN];
+ char path[SYSFS_PATH_MAX];
/* Private: for internal use only */
struct dlist *devices;
};
struct sysfs_device {
- unsigned char name[SYSFS_NAME_LEN];
- unsigned char bus_id[SYSFS_NAME_LEN];
- unsigned char bus[SYSFS_NAME_LEN];
- unsigned char driver_name[SYSFS_NAME_LEN];
- unsigned char path[SYSFS_PATH_MAX];
+ char name[SYSFS_NAME_LEN];
+ char bus_id[SYSFS_NAME_LEN];
+ char bus[SYSFS_NAME_LEN];
+ char driver_name[SYSFS_NAME_LEN];
+ char path[SYSFS_PATH_MAX];
/* Private: for internal use only */
struct sysfs_device *parent;
};
struct sysfs_root_device {
- unsigned char name[SYSFS_NAME_LEN];
- unsigned char path[SYSFS_PATH_MAX];
+ char name[SYSFS_NAME_LEN];
+ char path[SYSFS_PATH_MAX];
/* Private: for internal use only */
struct dlist *devices;
};
struct sysfs_bus {
- unsigned char name[SYSFS_NAME_LEN];
- unsigned char path[SYSFS_PATH_MAX];
+ char name[SYSFS_NAME_LEN];
+ char path[SYSFS_PATH_MAX];
/* Private: for internal use only */
struct dlist *drivers;
};
struct sysfs_class_device {
- unsigned char name[SYSFS_NAME_LEN];
- unsigned char classname[SYSFS_NAME_LEN];
- unsigned char path[SYSFS_PATH_MAX];
+ char name[SYSFS_NAME_LEN];
+ char classname[SYSFS_NAME_LEN];
+ char path[SYSFS_PATH_MAX];
/* Private: for internal use only */
struct sysfs_class_device *parent;
};
struct sysfs_class {
- unsigned char name[SYSFS_NAME_LEN];
- unsigned char path[SYSFS_PATH_MAX];
+ char name[SYSFS_NAME_LEN];
+ char path[SYSFS_PATH_MAX];
/* Private: for internal use only */
struct dlist *devices;
/*
* Function Prototypes
*/
-extern int sysfs_get_mnt_path(unsigned char *mnt_path, size_t len);
-extern int sysfs_remove_trailing_slash(unsigned char *path);
-extern int sysfs_get_name_from_path(const unsigned char *path,
- unsigned char *name, size_t len);
-extern int sysfs_path_is_dir(const unsigned char *path);
-extern int sysfs_path_is_link(const unsigned char *path);
-extern int sysfs_path_is_file(const unsigned char *path);
-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 int sysfs_get_mnt_path(char *mnt_path, size_t len);
+extern int sysfs_remove_trailing_slash(char *path);
+extern int sysfs_get_name_from_path(const char *path, char *name, size_t len);
+extern int sysfs_path_is_dir(const char *path);
+extern int sysfs_path_is_link(const char *path);
+extern int sysfs_path_is_file(const char *path);
+extern int sysfs_get_link(const char *path, char *target, size_t len);
+extern struct dlist *sysfs_open_subsystem_list(char *name);
+extern struct dlist *sysfs_open_bus_devices_list(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 struct sysfs_attribute *sysfs_open_attribute(const 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_read_attribute_value(const char *attrpath,
+ 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);
+ const char *new_value, size_t len);
+extern char *sysfs_get_value_from_attributes(struct dlist *attr,
+ const char *name);
extern int sysfs_refresh_dir_attributes(struct sysfs_directory *sysdir);
extern int sysfs_refresh_dir_links(struct sysfs_directory *sysdir);
extern int sysfs_refresh_dir_subdirs(struct sysfs_directory *sysdir);
extern void sysfs_close_directory(struct sysfs_directory *sysdir);
-extern struct sysfs_directory *sysfs_open_directory(const unsigned char *path);
+extern struct sysfs_directory *sysfs_open_directory(const char *path);
extern int sysfs_read_dir_attributes(struct sysfs_directory *sysdir);
extern int sysfs_read_dir_links(struct sysfs_directory *sysdir);
extern int sysfs_read_dir_subdirs(struct sysfs_directory *sysdir);
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);
+ (struct sysfs_directory *dir, 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_open_link(const char *lnpath);
+extern struct sysfs_link *sysfs_get_directory_link
+ (struct sysfs_directory *dir, char *linkname);
extern struct sysfs_link *sysfs_get_subdirectory_link
- (struct sysfs_directory *dir, unsigned char *linkname);
+ (struct sysfs_directory *dir, char *linkname);
extern struct sysfs_attribute *sysfs_get_directory_attribute
- (struct sysfs_directory *dir, unsigned char *attrname);
+ (struct sysfs_directory *dir, char *attrname);
extern struct dlist *sysfs_get_dir_attributes(struct sysfs_directory *dir);
extern struct dlist *sysfs_get_dir_links(struct sysfs_directory *dir);
extern struct dlist *sysfs_get_dir_subdirs(struct sysfs_directory *dir);
/* sysfs driver access */
extern void sysfs_close_driver(struct sysfs_driver *driver);
extern struct sysfs_driver *sysfs_open_driver
- (const unsigned char *drv_name, const unsigned char *bus_name);
-extern struct sysfs_driver *sysfs_open_driver_path(const unsigned char *path);
+ (const char *bus_name, const char *drv_name);
+extern struct sysfs_driver *sysfs_open_driver_path(const char *path);
extern struct sysfs_attribute *sysfs_get_driver_attr
- (struct sysfs_driver *drv, const unsigned char *name);
+ (struct sysfs_driver *drv, const char *name);
extern struct dlist *sysfs_get_driver_attributes(struct sysfs_driver *driver);
extern struct dlist *sysfs_get_driver_devices(struct sysfs_driver *driver);
extern struct dlist *sysfs_refresh_driver_devices(struct sysfs_driver *driver);
extern struct dlist *sysfs_get_driver_links(struct sysfs_driver *driver);
extern struct sysfs_device *sysfs_get_driver_device
- (struct sysfs_driver *driver, const unsigned char *name);
+ (struct sysfs_driver *driver, const char *name);
extern struct dlist *sysfs_refresh_driver_attributes
- (struct sysfs_driver *driver);
-extern struct sysfs_attribute *sysfs_open_driver_attr(const unsigned char *bus,
- const unsigned char *drv, const unsigned char *attrib);
+ (struct sysfs_driver *driver);
+extern struct sysfs_attribute *sysfs_open_driver_attr
+ (const char *bus, const char *drv, const char *attrib);
/* 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 struct sysfs_root_device *sysfs_open_root_device(const char *name);
extern struct dlist *sysfs_get_root_devices(struct sysfs_root_device *root);
+extern void sysfs_close_device_tree(struct sysfs_device *device);
+extern struct sysfs_device *sysfs_open_device_tree(const char *path);
extern void sysfs_close_device(struct sysfs_device *dev);
extern struct sysfs_device *sysfs_open_device
- (const unsigned char *bus_id, const unsigned char *bus);
+ (const char *bus, const char *bus_id);
extern struct sysfs_device *sysfs_get_device_parent(struct sysfs_device *dev);
-extern struct sysfs_device *sysfs_open_device_path(const unsigned char *path);
+extern struct sysfs_device *sysfs_open_device_path(const char *path);
extern int sysfs_get_device_bus(struct sysfs_device *dev);
extern struct sysfs_attribute *sysfs_get_device_attr
- (struct sysfs_device *dev, const unsigned char *name);
+ (struct sysfs_device *dev, const char *name);
extern struct dlist *sysfs_get_device_attributes(struct sysfs_device *device);
extern struct dlist *sysfs_refresh_device_attributes
- (struct sysfs_device *device);
-extern struct sysfs_attribute *sysfs_open_device_attr(const unsigned char *bus,
- const unsigned char *bus_id, const unsigned char *attrib);
+ (struct sysfs_device *device);
+extern struct sysfs_attribute *sysfs_open_device_attr(const char *bus,
+ const char *bus_id, const char *attrib);
/* 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_bus *sysfs_open_bus(const char *name);
+extern struct sysfs_device *sysfs_get_bus_device(struct sysfs_bus *bus,
+ char *id);
extern struct sysfs_driver *sysfs_get_bus_driver(struct sysfs_bus *bus,
- unsigned char *drvname);
+ char *drvname);
extern struct dlist *sysfs_get_bus_drivers(struct sysfs_bus *bus);
extern struct dlist *sysfs_get_bus_devices(struct sysfs_bus *bus);
extern struct dlist *sysfs_get_bus_attributes(struct sysfs_bus *bus);
extern struct dlist *sysfs_refresh_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_driver_bus(const unsigned char *driver,
- unsigned char *busname, size_t bsize);
+extern struct sysfs_attribute *sysfs_get_bus_attribute
+ (struct sysfs_bus *bus, char *attrname);
+extern int sysfs_find_driver_bus(const char *driver, 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_path
- (const unsigned char *path);
+ (const char *path);
extern struct sysfs_class_device *sysfs_open_class_device
- (const unsigned char *class, const unsigned char *name);
+ (const char *classname, const char *name);
extern struct sysfs_device *sysfs_get_classdev_device
- (struct sysfs_class_device *clsdev);
+ (struct sysfs_class_device *clsdev);
extern struct sysfs_driver *sysfs_get_classdev_driver
- (struct sysfs_class_device *clsdev);
+ (struct sysfs_class_device *clsdev);
extern struct sysfs_class_device *sysfs_get_classdev_parent
- (struct sysfs_class_device *clsdev);
+ (struct sysfs_class_device *clsdev);
extern void sysfs_close_class(struct sysfs_class *cls);
-extern struct sysfs_class *sysfs_open_class(const unsigned char *name);
+extern struct sysfs_class *sysfs_open_class(const char *name);
extern struct dlist *sysfs_get_class_devices(struct sysfs_class *cls);
extern struct sysfs_class_device *sysfs_get_class_device
- (struct sysfs_class *class, unsigned char *name);
+ (struct sysfs_class *cls, char *name);
extern struct dlist *sysfs_get_classdev_attributes
(struct sysfs_class_device *cdev);
extern struct dlist *sysfs_refresh_classdev_attributes
(struct sysfs_class_device *cdev);
extern struct sysfs_attribute *sysfs_get_classdev_attr
- (struct sysfs_class_device *clsdev, const unsigned char *name);
+ (struct sysfs_class_device *clsdev, const char *name);
extern struct sysfs_attribute *sysfs_open_classdev_attr
- (const unsigned char *classname, const unsigned char *dev,
- const unsigned char *attrib);
+ (const char *classname, const char *dev,
+ const char *attrib);
+
+/**
+ * sort_list: sorter function to keep list elements sorted in alphabetical
+ * order. Just does a strncmp as you can see :)
+ *
+ * Returns 1 if less than 0 otherwise
+ *
+ * NOTE: We take care to have a statically allocated "name" as the first
+ * lement of all libsysfs structures. Hence, this function will work
+ * AS IS for _ALL_ the lists that have to be sorted.
+ */
+static inline int sort_list(void *new_elem, void *old_elem)
+{
+ return ((strncmp(((struct sysfs_attribute *)new_elem)->name,
+ ((struct sysfs_attribute *)old_elem)->name,
+ strlen(((struct sysfs_attribute *)new_elem)->name))) < 0 ? 1 : 0);
+}
+
#ifdef __cplusplus
}
~ianmdlvl / elogind.git / blobdiff