freebsd-dev/bin/stty/stty.c
Baptiste Daroussin 6f7c45c9d5 Prevent potential integer overflow
PR:		192971
Submitted by:	David Carlier <david.carlier@hardenedbsd.org>
2015-07-13 05:59:41 +00:00

168 lines
4.1 KiB
C

/*-
* Copyright (c) 1989, 1991, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if 0
#ifndef lint
static char const copyright[] =
"@(#) Copyright (c) 1989, 1991, 1993, 1994\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
static char sccsid[] = "@(#)stty.c 8.3 (Berkeley) 4/2/94";
#endif /* not lint */
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "stty.h"
#include "extern.h"
int
main(int argc, char *argv[])
{
struct info i;
enum FMT fmt;
int ch;
const char *file, *errstr = NULL;
fmt = NOTSET;
i.fd = STDIN_FILENO;
file = "stdin";
opterr = 0;
while (optind < argc &&
strspn(argv[optind], "-aefg") == strlen(argv[optind]) &&
(ch = getopt(argc, argv, "aef:g")) != -1)
switch(ch) {
case 'a': /* undocumented: POSIX compatibility */
fmt = POSIX;
break;
case 'e':
fmt = BSD;
break;
case 'f':
if ((i.fd = open(optarg, O_RDONLY | O_NONBLOCK)) < 0)
err(1, "%s", optarg);
file = optarg;
break;
case 'g':
fmt = GFLAG;
break;
case '?':
default:
goto args;
}
args: argc -= optind;
argv += optind;
if (tcgetattr(i.fd, &i.t) < 0)
errx(1, "%s isn't a terminal", file);
if (ioctl(i.fd, TIOCGETD, &i.ldisc) < 0)
err(1, "TIOCGETD");
if (ioctl(i.fd, TIOCGWINSZ, &i.win) < 0)
warn("TIOCGWINSZ");
checkredirect(); /* conversion aid */
switch(fmt) {
case NOTSET:
if (*argv)
break;
/* FALLTHROUGH */
case BSD:
case POSIX:
print(&i.t, &i.win, i.ldisc, fmt);
break;
case GFLAG:
gprint(&i.t, &i.win, i.ldisc);
break;
}
for (i.set = i.wset = 0; *argv; ++argv) {
if (ksearch(&argv, &i))
continue;
if (csearch(&argv, &i))
continue;
if (msearch(&argv, &i))
continue;
if (isdigit(**argv)) {
speed_t speed;
speed = strtonum(*argv, 0, UINT_MAX, &errstr);
if (errstr)
err(1, "speed");
cfsetospeed(&i.t, speed);
cfsetispeed(&i.t, speed);
i.set = 1;
continue;
}
if (!strncmp(*argv, "gfmt1", sizeof("gfmt1") - 1)) {
gread(&i.t, *argv + sizeof("gfmt1") - 1);
i.set = 1;
continue;
}
warnx("illegal option -- %s", *argv);
usage();
}
if (i.set && tcsetattr(i.fd, 0, &i.t) < 0)
err(1, "tcsetattr");
if (i.wset && ioctl(i.fd, TIOCSWINSZ, &i.win) < 0)
warn("TIOCSWINSZ");
exit(0);
}
void
usage(void)
{
(void)fprintf(stderr,
"usage: stty [-a | -e | -g] [-f file] [arguments]\n");
exit (1);
}