From 0c91a05ef7e3a1a38089b0ba278bd61948c377ac Mon Sep 17 00:00:00 2001
From: Johannes Leupolz <dev@leupolz.eu>
Date: Tue, 23 Dec 2025 21:47:16 +0000
Subject: [PATCH] Improve help message and cargo fmt

---
 vuinputd/src/main.rs     | 6 +++++-
 vuinputd/src/vt_tools.rs | 7 ++-----
 2 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/vuinputd/src/main.rs b/vuinputd/src/main.rs
index c9601ca..16f8763 100644
--- a/vuinputd/src/main.rs
+++ b/vuinputd/src/main.rs
@@ -79,7 +79,10 @@ struct Args {
 
     #[arg(
         long = "vt-guard",
-        help = "Prevent leakage of uinput to VT by, sending K_OFF to /dev/tty0"
+        help = "Prevent all keyboard input from reaching the VT by setting K_OFF on /dev/tty0.",
+        long_help = "Disable VT keyboard handling (K_OFF on /dev/tty0) to prevent uinput leakage.\n\
+                 This disables all keyboard input on the virtual terminals, including physical keyboards.\n\
+                 Loss of local access may require recovery via SSH or a rescue boot."
     )]
     pub vt_guard: bool,
 }
@@ -144,6 +147,7 @@ fn main() -> std::io::Result<()> {
 
     if args.vt_guard {
         vt_tools::mute_keyboard()?;
+        std::process::exit(0);
     }
 
     check_permissions().expect("failed to read the capabilities of the vuinputd process");
diff --git a/vuinputd/src/vt_tools.rs b/vuinputd/src/vt_tools.rs
index 60be9f5..ac5a558 100644
--- a/vuinputd/src/vt_tools.rs
+++ b/vuinputd/src/vt_tools.rs
@@ -2,10 +2,10 @@
 //
 // Author: Johannes Leupolz <dev@leupolz.eu>
 
+use log::{error, info, warn};
 use std::fs::OpenOptions;
 use std::io;
 use std::os::unix::io::AsRawFd;
-use log::{error, info, warn};
 
 use libc::ioctl;
 
@@ -29,10 +29,7 @@ pub fn check_vt_status() {
 
             let rc = unsafe { ioctl(fd, KDGKBMODE, &mut mode) };
             if rc < 0 {
-                error!(
-                    "KDGKBMODE ioctl failed: {}",
-                    io::Error::last_os_error()
-                );
+                error!("KDGKBMODE ioctl failed: {}", io::Error::last_os_error());
                 return;
             }