fixed ss3 escape code parsing, added a cursor mode reset that triggers on child exit

src/libsh/error.rs

@@ -201,7 +201,7 @@ impl ShErr {
   pub fn is_flow_control(&self) -> bool {
     self.kind.is_flow_control()
   }
-	/// Promotes a shell error from a simple error to an error that blames a span
+  /// Promotes a shell error from a simple error to an error that blames a span
   pub fn promote(mut self, span: Span) -> Self {
     if self.notes.is_empty() {
       return self;
@@ -210,8 +210,8 @@ impl ShErr {
     if self.notes.len() > 1 {
       self.notes = self.notes[1..].to_vec();
     } else {
-			self.notes = vec![];
-		}
+      self.notes = vec![];
+    }
 
     self.labeled(span, first)
   }

src/libsh/guards.rs

@@ -3,7 +3,7 @@ use std::collections::HashSet;
 use std::os::fd::{BorrowedFd, RawFd};
 
 use nix::sys::termios::{self, LocalFlags, Termios, tcgetattr, tcsetattr};
-use nix::unistd::isatty;
+use nix::unistd::{isatty, write};
 use scopeguard::guard;
 
 thread_local! {
@@ -150,6 +150,7 @@ impl RawModeGuard {
     tcsetattr(borrow_fd(*TTY_FILENO), termios::SetArg::TCSANOW, &orig).ok();
     let res = f();
     tcsetattr(borrow_fd(*TTY_FILENO), termios::SetArg::TCSANOW, &current).ok();
+    unsafe { write(BorrowedFd::borrow_raw(*TTY_FILENO), b"\x1b[?1l\x1b>").ok() };
     res
   }
 }
@@ -157,11 +158,12 @@ impl RawModeGuard {
 impl Drop for RawModeGuard {
   fn drop(&mut self) {
     unsafe {
-      let _ = termios::tcsetattr(
+      termios::tcsetattr(
         BorrowedFd::borrow_raw(self.fd),
         termios::SetArg::TCSANOW,
         &self.orig,
-      );
+      )
+      .ok();
     }
   }
 }

src/libsh/sys.rs

@@ -9,7 +9,8 @@ pub static TTY_FILENO: LazyLock<RawFd> = LazyLock::new(|| {
   let fd = open("/dev/tty", OFlag::O_RDWR, Mode::empty()).expect("Failed to open /dev/tty");
   // Move the tty fd above the user-accessible range so that
   // `exec 3>&-` and friends don't collide with shell internals.
-  let high = fcntl(fd, FcntlArg::F_DUPFD_CLOEXEC(MIN_INTERNAL_FD)).expect("Failed to dup /dev/tty high");
+  let high =
+    fcntl(fd, FcntlArg::F_DUPFD_CLOEXEC(MIN_INTERNAL_FD)).expect("Failed to dup /dev/tty high");
   close(fd).ok();
   high
 });