From 817b371ce04c3fa7b0cbb8dbd20323760781022a Mon Sep 17 00:00:00 2001
From: "Richard M. Stallman" <rms@gnu.org>
Date: Wed, 12 Jan 1994 04:48:56 +0000
Subject: [PATCH] [USG] (SIGIO): Define as SIGPOLL. (main) [USG]: Do ioctl to
 enable SIGPOLL.

---
 lib-src/timer.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib-src/timer.c b/lib-src/timer.c
index cb7c4c0b2b1..0b47fac3917 100644
--- a/lib-src/timer.c
+++ b/lib-src/timer.c
@@ -20,7 +20,7 @@
 #include <../src/config.h>
 #ifdef USG
 #undef SIGIO
-#define SIGIO	SIGUSR1
+#define SIGIO SIGPOLL
 #endif
 
 #ifdef LINUX
@@ -291,6 +291,9 @@ main (argc, argv)
       fprintf (stderr, "%s\n", strerror (errno));
       exit (1);
     }
+#else /* USG */
+  /* Register this process for SIGPOLL.  */
+  ioctl (0, I_SETSIG, S_RDNORM);
 #endif /* USG */
 
   /* In case Emacs sent some input before we set up
-- 
2.30.2