* autoload.cc (LoadDLLinitfunc): Remove debugging statement.

* exceptions.cc (sig_handle_tty_stop): Move setting of PID_STOPPED to earlier
in interrupt.
((interrupt_setup): i.e., here.
(sig_handle): Don't queue multiple SIGSTOPS.
* fhandler.h (bg_check_types): Enumerate return value of bg_check for clarity.
* signal.cc (kill_pgrp): Minor cleanup.
* fhandler_termios.cc (fhandler_termios::bg_check): Use enumerated type for
function return.  Don't raise signal if a signal is already queued.
* fhandler_console.cc (fhandler_console::read): Use enumerated return type for
bg_check.
* select.cc: Ditto, throughout.
* read.cc: Ditto, throughout.
* termios.cc: Ditto, throughout.
(_read): YA interrupt detect simplification.
* wait.cc (wait4): Ditto.

winsup/cygwin/fhandler_console.cc

@@ -168,7 +168,7 @@ fhandler_console::read (void *pv, size_t buflen)
   for (;;)
     {
       int bgres;
-      if ((bgres = bg_check (SIGTTIN)) <= 0)
+      if ((bgres = bg_check (SIGTTIN)) <= bg_eof)
 	return bgres;
 
       set_cursor_maybe ();	/* to make cursor appear on the screen immediately */