Refactor project layout

cmd/tty.go

@@ -0,0 +1,40 @@
+package cmd
+
+import (
+	"fmt"
+	"os"
+	"os/signal"
+	"syscall"
+
+	"golang.org/x/term"
+)
+
+func promptPassword(username string) (string, error) {
+	terminal, err := os.OpenFile("/dev/tty", os.O_RDWR, 0)
+	if err != nil {
+		return "", fmt.Errorf("cannot open terminal for password prompt\nhint: run 'kinit' for Kerberos auth")
+	}
+
+	oldState, err := term.MakeRaw(int(terminal.Fd()))
+	if err != nil {
+		return "", fmt.Errorf("setting terminal raw mode: %w", err)
+	}
+
+	sigCh := make(chan os.Signal, 1)
+	signal.Notify(sigCh, os.Interrupt, syscall.SIGTERM)
+	go func() {
+		<-sigCh
+		term.Restore(int(terminal.Fd()), oldState)
+		os.Exit(1)
+	}()
+
+	fmt.Fprintf(terminal, "Password for %s: ", username)
+	pw, err := term.ReadPassword(int(terminal.Fd()))
+	fmt.Fprintf(terminal, "\r\n")
+	signal.Stop(sigCh)
+	term.Restore(int(terminal.Fd()), oldState)
+	if err != nil {
+		return "", fmt.Errorf("reading password: %w", err)
+	}
+	return string(pw), nil
+}