use anyhow::Result;
use evdev::Device;
use std::process::exit;
pub(crate) fn open_input_device_or_exit(device_name: String, label: String) -> Result<Device> {
match open_input_device(device_name, label) {
Ok(device) => Ok(device),
Err(e) => {
log::error!("{}", e);
exit(1);
}
}
}
fn open_input_device(device_name: String, label: String) -> Result<Device, String> {
Device::open(device_name)
.map_err(|e| format!("Could not open {}: {}", label, e))
.and_then(|mut device| {
log::info!(
"Opened {} \"{}\".",
label,
device.name().unwrap_or("unnamed device")
);
grab_reader_input_device(&mut device, label)?;
Ok(device)
})
}
fn grab_reader_input_device(device: &mut Device, label: String) -> Result<(), String> {
device
.grab()
.map_err(|e| format!("Could not get exclusive access to {}: {}", label, e))
.map(|()| {
log::info!("Successfully obtained exclusive access to {}.", label);
})
}