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From: ado@elsie.UUCP (Arthur David Olson)
Newsgroups: net.bugs.4bsd
Subject: 4.[123]bsd stty command gives garbage for exotic speed codes (with fix)
Message-ID: <6087@elsie.UUCP>
Date: Tue, 29-Apr-86 16:07:43 EDT
Article-I.D.: elsie.6087
Posted: Tue Apr 29 16:07:43 1986
Date-Received: Fri, 2-May-86 23:36:49 EDT
Organization: NIH-LEC, Bethesda, MD
Lines: 52
Keywords: bsd stty speed

Index:	bin/stty.c Fix

Description:
	The stty command gives wild output for speed values outside the
	range it knows about.

Repeat-By:
	Compile this source into a.out:
		#

		#include "sgtty.h"

		main(argc, argv)
		int	argc;
		char *	argv[];
		{
			struct sgttyb	old, new;

			gtty(0, &old);
			new = old;
			new.sg_ispeed = new.sg_ospeed = atoi(argv[1]);
			stty(0, &new);
			(void) system("stty 2>&1 1>&0");
			stty(0, &old);
			return 0;
		}
	then type in the command
		a.out 20 > results ; cat results
	and note the "speed" portion of the output:
		. . .speed 1701707883 baud; . . .

Fix:
	The fix is to stty.c, in particular to the function prspeed.
	The changes are shown below, conditioned on OLDVERSION.
	As usual, the trade secret status of the code involved precludes
	a clearer posting.

	prspeed(c, s)
	char *c;
	{

	#ifdef OLDVERSION
		fprintf(stderr,"%s%d baud",  c, speed[s]);
	#else
		if (s < 0 || s >= sizeof speed / sizeof speed[0])
			(void) fprintf(stderr, "%scode %d", c, s);
		else	(void) fprintf(stderr, "%s%d baud", c, speed[s]);
	#endif OLDVERSION
	}
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