Method build

src/uinput.rs:221–239

Finalize and register this device. # Errors Returns an error if device setup or creation fails.

(self)

    /// # Errors
    /// Returns an error if device setup or creation fails.
    pub fn build(self) -> io::Result<VirtualDevice> {
        // Populate the uinput_setup struct

        let mut usetup = uinput_setup {
            id: self.id.unwrap_or(DEFAULT_ID),
            name: [0; UINPUT_MAX_NAME_SIZE],
            ff_effects_max: self.ff_effects_max,
        };

        // SAFETY: either casting [u8] to [u8], or [u8] to [i8], which is the same size
        let name_bytes = unsafe { &*(self.name as *const [u8] as *const [libc::c_char]) };
        // Panic if we're doing something really stupid
        // + 1 for the null terminator; usetup.name was zero-initialized so there will be null
        // bytes after the part we copy into
        assert!(name_bytes.len() + 1 < UINPUT_MAX_NAME_SIZE);
        usetup.name[..name_bytes.len()].copy_from_slice(name_bytes);

        VirtualDevice::new(self.fd, &usetup)
    }
}

const DEFAULT_ID: input_id = input_id {