From f936548b5e1dc6cff6e422867a4265c64ebbcfd1 Mon Sep 17 00:00:00 2001
From: rsc <devnull@localhost>
Date: Mon, 26 Jun 2006 05:45:25 +0000
Subject: slow mode for debugging

---
 src/cmd/devdraw/x11-srv.c | 19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

diff --git a/src/cmd/devdraw/x11-srv.c b/src/cmd/devdraw/x11-srv.c
index a5c5bf11..f0b9dc28 100644
--- a/src/cmd/devdraw/x11-srv.c
+++ b/src/cmd/devdraw/x11-srv.c
@@ -87,6 +87,7 @@ void matchresized(void);
 int fdnoblock(int);
 
 int chatty;
+int drawsleep;
 
 void
 usage(void)
@@ -95,6 +96,14 @@ usage(void)
 	exits("usage");
 }
 
+void
+bell(void *v, char *msg)
+{
+	if(strcmp(msg, "alarm") == 0)
+		drawsleep = drawsleep ? 0 : 1000;
+	noted(NCONT);
+}
+
 void
 main(int argc, char **argv)
 {
@@ -110,9 +119,12 @@ main(int argc, char **argv)
 	default:
 		usage();
 	}ARGEND
+
+	/*
+	 * Ignore arguments.  They're only for good ps -a listings.
+	 */
 	
-	if(argc != 0)
-		usage();
+	notify(bell);
 
 	fdin.rp = fdin.wp = fdin.buf;
 	fdin.ep = fdin.buf+sizeof fdin.buf;
@@ -155,7 +167,10 @@ main(int argc, char **argv)
 		if(chatty)
 			fprint(2, "select %d...\n", top+1);
 		/* wait for something to happen */
+	    again:
 		if(select(top+1, &rd, &wr, &xx, NULL) < 0){
+			if(errno == EINTR)
+				goto again;
 			if(chatty)
 				fprint(2, "select failure\n");
 			exits(0);
-- 
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