Use redox-daemon in getty

Cargo.lock

@@ -158,6 +158,16 @@ version = "1.13.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "18a6dbe30758c9f83eb00cbea4ac95966305f5a7772f3f42ebfc7fc7eddbd8e1"
 
+[[package]]
+name = "redox-daemon"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "21e31c834277709c7ff3eb74959fe62be4b45b1189ba9d41fd3744cd3a9c554f"
+dependencies = [
+ "libc",
+ "redox_syscall",
+]
+
 [[package]]
 name = "redox_liner"
 version = "0.5.1"
@@ -250,6 +260,7 @@ version = "0.1.0"
 dependencies = [
  "clap",
  "extra",
+ "redox-daemon",
  "redox_liner",
  "redox_syscall",
  "redox_termios",

Cargo.toml

@@ -53,6 +53,7 @@ path = "src/bin/usermod.rs"
 [dependencies]
 clap = "2.33.0"
 extra = { git = "https://gitlab.redox-os.org/redox-os/libextra.git" }
+redox-daemon = "0.1"
 redox_liner = "0.5.1"
 redox_syscall = "0.2.12"
 redox_termios = "0.1.2"

src/bin/getty.rs

@@ -197,9 +197,9 @@ pub fn main() {
         Err(err) => fail(&format!("getty: failed to open TTY {}: {}", tty, err), &mut stderr),
     };
 
-    match unsafe { syscall::clone(syscall::CloneFlags::empty()) } {
-        Ok(0) => daemon(tty_fd as RawFd, clear, &mut stderr),
-        Ok(_) => (),
-        Err(err) => fail(&format!("getty: failed to fork login: {}", err), &mut stderr)
-    }
+    redox_daemon::Daemon::new(|d| {
+        d.ready().expect("getty: failed to notify ");
+        daemon(tty_fd as RawFd, clear, &mut stderr);
+        std::process::exit(0);
+    }).unwrap_or_else(|err| fail(&format!("getty: failed to fork login: {}", err), &mut stderr));
 }