Struct sysfs_class::Backlight

pub struct Backlight { /* fields omitted */ }

Fetch and modify brightness values of backlight controls.

Methods

impl Backlight

pub fn actual_brightness(&self) -> Result<u64>

pub fn bl_power(&self) -> Result<u64>

pub fn type_(&self) -> Result<String>

Trait Implementations

impl Brightness for Backlight

fn brightness(&self) -> Result<u64>

fn max_brightness(&self) -> Result<u64>

fn set_brightness(&self, input: u64) -> Result<()>

fn set_if_lower_than(&self, percent: u64) -> Result<()>

Sets the new brightness level if it is less than the current brightness.

impl Clone for Backlight

fn clone(&self) -> Backlight

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl SysClass for Backlight

fn class() -> &'static str

Return the class of the sys object, the name of a folder in `/sys/${base}``

unsafe fn from_path_unchecked(path: PathBuf) -> Self

Create a sys object from an absolute path without checking path for validity

fn path(&self) -> &Path

Return the path of the sys object

fn base() -> &'static str

Sets the base directory, which defaults to class.

fn dir() -> PathBuf

Return the path to the sys objects, the full path of a folder in /sys/class

fn from_path(path: &Path) -> Result<Self>

Create a sys object from a path, checking it for validity

fn all() -> Result<Vec<Self>>

Retrieve all of the object instances of a sys class

fn iter() -> Box<dyn Iterator<Item = Result<Self>>> where
    Self: 'static, 

Retrieve all of the object instances of a sys class, with a boxed iterator

fn new(id: &str) -> Result<Self>

Create a sys object by id, checking it for validity

fn id(&self) -> &str

Return the id of the sys object

fn read_file<P: AsRef<Path>>(&self, name: P) -> Result<String>

Read a file underneath the sys object

fn parse_file<F: FromStr, P: AsRef<Path>>(&self, name: P) -> Result<F> where
    F::Err: Display, 

Parse a number from a file underneath the sys object

fn trim_file<P: AsRef<Path>>(&self, name: P) -> Result<String>

Read a file underneath the sys object and trim whitespace

fn write_file<P: AsRef<Path>, S: AsRef<[u8]>>(
    &self,
    name: P,
    data: S
) -> Result<()>

Write a file underneath the sys object