Trait efivar::VarReader

pub trait VarReader {
    // Required method
    fn read(&self, var: &Variable) -> Result<(Vec<u8>, VariableFlags)>;

    // Provided method
    fn exists(&self, var: &Variable) -> Result<bool> { ... }
}

Represents the capability of reading EFI variables

Required Methods

fn read(&self, var: &Variable) -> Result<(Vec<u8>, VariableFlags)>

Read the EFI variable name and return its attributes and raw value

The caller is responsible for allocating a large enough buffer to hold the value for the target variable. This interface is used since some backends (Windows) don’t have an API for reporting the value size before reading it.

Arguments

• var: variable to read
• value: target buffer for returning the variable value

Return value

On success, number of bytes read and associated EFI variable flags.

Provided Methods

fn exists(&self, var: &Variable) -> Result<bool>

Implementors