bc: sync with OpenBSD

tty.c Rev. 1.3
Avoid unintended problems with operator precedence when doing an
assignment and comparison.

bc.1, Rev. 1.31, 1.32
'.Ql Quit' -> '.Ql quit' because only the lowercase command is valid.
Clarify sentence about `quit` in BUGS section.

extern.h, Rev. 1.12
whitespace

bc.y, Rev. 1.47
Prefer setvbuf() to setlinebuf() for portability

Obtained from:	OpenBSD
MFC after:	2 weeks

4 files changed, 14 insertions, 13 deletions

diff --git a/usr.bin/bc/bc.1 b/usr.bin/bc/bc.1
index 2d539ee1c5b6..a762832b06df 100644
--- a/usr.bin/bc/bc.1
+++ b/usr.bin/bc/bc.1
@@ -1,5 +1,5 @@
 .\"	$FreeBSD$
-.\"	$OpenBSD: bc.1,v 1.30 2014/01/14 07:42:42 jmc Exp $
+.\"	$OpenBSD: bc.1,v 1.32 2015/11/17 05:45:35 mmcc Exp $
 .\"
 .\" Copyright (C) Caldera International Inc.  2001-2002.
 .\" All rights reserved.
@@ -35,7 +35,7 @@
 .\"
 .\"	@(#)bc.1	6.8 (Berkeley) 8/8/91
 .\"
-.Dd April 16, 2014
+.Dd November 21 2015 
 .Dt BC 1
 .Os
 .Sh NAME
@@ -407,8 +407,9 @@ The current version of the
 utility was written by
 .An Otto Moerbeek .
 .Sh BUGS
-.Ql Quit
-is interpreted when read, not when executed.
+The
+.Ql quit
+statement is interpreted when read, not when executed.
 .Pp
 Some non-portable extensions, as found in the GNU version of the
 .Nm
diff --git a/usr.bin/bc/bc.y b/usr.bin/bc/bc.y
index 8e7e00cbfc32..50454e654e29 100644
--- a/usr.bin/bc/bc.y
+++ b/usr.bin/bc/bc.y
@@ -1125,7 +1125,7 @@ main(int argc, char *argv[])
 	int ch, i;
 
 	init();
-	setlinebuf(stdout);
+	setvbuf(stdout, NULL, _IOLBF, 0);
 
 	sargv = malloc(argc * sizeof(char *));
 	if (sargv == NULL)
diff --git a/usr.bin/bc/extern.h b/usr.bin/bc/extern.h
index 685942acd52f..7909a17ddeb2 100644
--- a/usr.bin/bc/extern.h
+++ b/usr.bin/bc/extern.h
@@ -1,5 +1,5 @@
 /*	$FreeBSD$						*/
-/*      $OpenBSD: extern.h,v 1.10 2013/09/19 16:12:01 otto Exp $	*/
+/*      $OpenBSD: extern.h,v 1.12 2014/04/17 19:07:14 otto Exp $	*/
 
 /*
  * Copyright (c) 2003, Otto Moerbeek <otto@drijf.net>
@@ -39,9 +39,9 @@ extern int	fileindex;
 extern int	sargc;
 extern const char	**sargv;
 extern const char	*filename;
-extern bool		 interactive;
-extern EditLine		*el;
-extern History		*hist;
-extern HistEvent	 he;
+extern bool	 interactive;
+extern EditLine	*el;
+extern History	*hist;
+extern HistEvent he;
 extern char	*cmdexpr;
 extern struct termios ttysaved;
diff --git a/usr.bin/bc/tty.c b/usr.bin/bc/tty.c
index 05f9d1431797..f5d72fc9c817 100644
--- a/usr.bin/bc/tty.c
+++ b/usr.bin/bc/tty.c
@@ -1,5 +1,5 @@
 /*	$FreeBSD$	*/
-/*      $OpenBSD: tty.c,v 1.2 2013/11/12 13:54:51 deraadt Exp $	*/
+/*      $OpenBSD: tty.c,v 1.3 2015/09/05 09:49:24 jsg Exp $	*/
 
 /*
  * Copyright (c) 2013, Otto Moerbeek <otto@drijf.net>
@@ -30,7 +30,7 @@ settty(struct termios *t)
 {
 	int ret;
 
-	while ((ret = tcsetattr(0, TCSADRAIN,  t) == -1) && errno == EINTR)
+	while ((ret = tcsetattr(0, TCSADRAIN,  t)) == -1 && errno == EINTR)
 		continue;
 	return ret;
 }
@@ -40,7 +40,7 @@ gettty(struct termios *t)
 {
 	int ret;
 
-	while ((ret = tcgetattr(0, t) == -1) && errno == EINTR)
+	while ((ret = tcgetattr(0, t)) == -1 && errno == EINTR)
 		continue;
 	return ret;
 }