getty/login: diagnostic logging for login prompt tracing

src/bin/getty.rs

@@ -8,6 +8,7 @@ use std::io::{self, ErrorKind, Read, Stderr, Write};
 fn dlog(msg: &str) {
     let _ = OpenOptions::new()
         .write(true)
+        .append(true)
         .open("/scheme/debug/no-preserve")
         .and_then(|mut f| writeln!(f, "GETTY {}", msg));
 }

src/bin/login.rs

@@ -9,6 +9,7 @@ use std::str;
 fn dlog(msg: &str) {
     let _ = OpenOptions::new()
         .write(true)
+        .append(true)
         .open("/scheme/debug/no-preserve")
         .and_then(|mut f| writeln!(f, "LOGIN {}", msg));
 }
@@ -16,6 +17,7 @@ fn dlog(msg: &str) {
 use extra::option::OptionalExt;
 use redox_users::{All, AllUsers, Config, User};
 use termion::input::TermRead;
+use termion::raw::IntoRawMode;
 use userutils::spawn_shell;
 
 const _MAN_PAGE: &'static str = /* @MANSTART{login} */
@@ -144,6 +146,15 @@ pub fn main() {
         dlog("no issue file");
     }
 
+    match termion::terminal_size() {
+        Ok((w, h)) => dlog(&format!("terminal_size {}x{}", w, h)),
+        Err(e) => dlog(&format!("terminal_size error: {}", e)),
+    }
+    match io::stdout().into_raw_mode() {
+        Ok(_rt) => dlog("raw mode ok"),
+        Err(e) => dlog(&format!("raw mode error: {}", e)),
+    }
+
     loop {
         dlog("before liner read_line");
         let _ = stdout.write_all(b"DIRECT_PROMPT_TEST");
@@ -159,6 +170,7 @@ pub fn main() {
         dlog("after liner read_line");
 
         if !user.is_empty() {
+            dlog(&format!("read user: {}", user));
             let stdin = io::stdin();
             let mut stdin = stdin.lock();
             let sys_users = AllUsers::authenticator(Config::default()).unwrap_or_exit(1);
@@ -172,6 +184,7 @@ pub fn main() {
                 }
                 Some(user) => {
                     if user.is_passwd_blank() {
+                        dlog("user blank password, spawning shell");
                         if let Ok(mut motd) = File::open(MOTD_FILE) {
                             io::copy(&mut motd, &mut stdout).r#try(&mut stderr);
                             stdout.flush().r#try(&mut stderr);