udev

udev — libudev context

Functions

struct udev * udev_ref ()
struct udev * udev_unref ()
struct udev * udev_new ()
void udev_set_log_fn ()
int udev_get_log_priority ()
void udev_set_log_priority ()
void * udev_get_userdata ()
void udev_set_userdata ()

Types and Values

struct udev

Description

The context contains the default values read from the udev config file, and is passed to all library operations.

Functions

udev_ref ()

struct udev *
udev_ref (struct udev *udev);

Take a reference of the udev library context.

Parameters

udev

udev library context

 

Returns

the passed udev library context


udev_unref ()

struct udev *
udev_unref (struct udev *udev);

Drop a reference of the udev library context. If the refcount reaches zero, the resources of the context will be released.

Parameters

udev

udev library context

 

Returns

the passed udev library context if it has still an active reference, or NULL otherwise.


udev_new ()

struct udev *
udev_new (void);

Create udev library context. This reads the udev configuration file, and fills in the default values.

The initial refcount is 1, and needs to be decremented to release the resources of the udev library context.

Returns

a new udev library context


udev_set_log_fn ()

void
udev_set_log_fn (struct udev *udev,
                 void (*log_fn) (struct udev *udev, int priority, const char *file, int line, const char *fn, const char *format, va_list args));

This function is deprecated.

Parameters

udev

udev library context

 

log_fn

function to be called for log messages

 

udev_get_log_priority ()

int
udev_get_log_priority (struct udev *udev);

This function is deprecated.

Parameters

udev

udev library context

 

Returns


udev_set_log_priority ()

void
udev_set_log_priority (struct udev *udev,
                       int priority);

This function is deprecated.

Parameters

udev

udev library context

 

priority

the new log priority

 

udev_get_userdata ()

void *
udev_get_userdata (struct udev *udev);

Retrieve stored data pointer from library context. This might be useful to access from callbacks.

Parameters

udev

udev library context

 

Returns

stored userdata


udev_set_userdata ()

void
udev_set_userdata (struct udev *udev,
                   void *userdata);

Store custom userdata in the library context.

Parameters

udev

udev library context

 

userdata

data pointer

 

Types and Values

struct udev

struct udev;

Opaque object representing the library context.