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daemon: fall back to X11 capture when evdev produces no events

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When evdev's EVIOCGRAB works (returns success) but no keyboard events
arrive (common in VMs where input bypasses the grabbed device), the
daemon previously exited silently after the 30-second safety timeout.
Now it falls through to X11 XRecord capture as a fallback, which works
reliably in VMs by intercepting keystrokes at the X11 protocol level
rather than the evdev level.

- run_with_evdev no longer uses 'return', so main() continues to X11
  capture after evdev exits (timeout or error)
This commit is contained in:
Khoa Vo 2026-07-02 13:33:41 +07:00
parent 41ecc48b0a
commit 24f9bc8c7e
1 changed files with 25 additions and 12 deletions
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37
daemon/src/main.rs
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@ -855,20 +855,33 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
});
}
// Try evdev first (more reliable than X11 XRecord)
// Try evdev first (more reliable than X11 XRecord in most environments).
// If the evdev device opens but produces no events (common in VMs where
// keyboard input bypasses the evdev grab), run_with_evdev will exit via
// the 30-second safety timeout — we fall through to X11 capture.
match open_keyboard_device() {
Ok((device, path)) => {
log_info(&format!("[vietc] Keyboard device: {}", path));
return run_with_evdev(
match run_with_evdev(
device,
&mut daemon,
shared_active_window,
shared_window_class,
config_changed,
status_changed,
engine_enabled,
shared_active_window.clone(),
shared_window_class.clone(),
config_changed.clone(),
status_changed.clone(),
engine_enabled.clone(),
display,
);
) {
Ok(()) => {
log_info("[vietc] evdev returned, trying X11 capture as fallback");
}
Err(e) => {
log_info(&format!(
"[vietc] evdev exited with error: {} — trying X11 capture",
e
));
}
}
}
Err(e) => {
log_info(&format!("[vietc] evdev not available: {}", e));
@ -882,10 +895,10 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
return run_with_x11(
capture,
&mut daemon,
shared_active_window.clone(),
config_changed.clone(),
status_changed.clone(),
engine_enabled.clone(),
shared_active_window,
config_changed,
status_changed,
engine_enabled,
);
} else {
log_info("[vietc] X11 not available, falling back");