From 99c75f3c503b7b3d667c251e90170bf7e10037ce Mon Sep 17 00:00:00 2001
From: rsc <devnull@localhost>
Date: Tue, 20 Apr 2004 15:16:18 +0000
Subject: fix a deadlock.

---
 src/cmd/9term/bsdpty.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/cmd/9term/bsdpty.c b/src/cmd/9term/bsdpty.c
index b5e09195..0de9137d 100644
--- a/src/cmd/9term/bsdpty.c
+++ b/src/cmd/9term/bsdpty.c
@@ -106,7 +106,13 @@ setecho(int fd, int newe)
 	if(old != newe){
 		ttmode.c_lflag &= ~ECHO;
 		ttmode.c_lflag |= newe;
-		if(tcsetattr(fd, TCSADRAIN, &ttmode) < 0)
+		/*
+		 * I tried using TCSADRAIN here, but that causes
+		 * hangs if there is any output waiting for us.
+		 * I guess TCSADRAIN is intended for use by our
+		 * clients, not by us.
+		 */
+		if(tcsetattr(fd, 0, &ttmode) < 0)
 			fprint(2, "tcsetattr: %r\n");
 	}
 	return old;
-- 
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