os specific ctrl-z (#1420)

readline/readline_unix.go

@@ -0,0 +1,18 @@
+//go:build !windows
+
+package readline
+
+import (
+	"syscall"
+)
+
+func handleCharCtrlZ(fd int, termios *Termios) (string, error) {
+	if err := UnsetRawMode(fd, termios); err != nil {
+		return "", err
+	}
+
+	syscall.Kill(0, syscall.SIGSTOP)
+
+	// on resume...
+	return "", nil
+}