freebsd-src/bin/stty/gfmt.c
Colin Percival f9bcf9cabf Mark functions as __dead2 in order to help the LLVM static checker
understand which code paths aren't possible.

This commit eliminates 117 false positive bug reports of the form
"allocate memory; error out if pointer is NULL; use pointer".
2008-08-04 01:25:48 +00:00

128 lines
3.5 KiB
C

/*-
* Copyright (c) 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.
*/
#ifndef lint
#if 0
static char sccsid[] = "@(#)gfmt.c 8.6 (Berkeley) 4/2/94";
#endif
#endif /* not lint */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <err.h>
#include <stdio.h>
#include <string.h>
#include "stty.h"
#include "extern.h"
static void gerr(const char *s) __dead2;
static void
gerr(const char *s)
{
if (s)
errx(1, "illegal gfmt1 option -- %s", s);
else
errx(1, "illegal gfmt1 option");
}
void
gprint(struct termios *tp, struct winsize *wp __unused, int ldisc __unused)
{
struct cchar *cp;
(void)printf("gfmt1:cflag=%lx:iflag=%lx:lflag=%lx:oflag=%lx:",
(u_long)tp->c_cflag, (u_long)tp->c_iflag, (u_long)tp->c_lflag,
(u_long)tp->c_oflag);
for (cp = cchars1; cp->name; ++cp)
(void)printf("%s=%x:", cp->name, tp->c_cc[cp->sub]);
(void)printf("ispeed=%lu:ospeed=%lu\n",
(u_long)cfgetispeed(tp), (u_long)cfgetospeed(tp));
}
void
gread(struct termios *tp, char *s)
{
struct cchar *cp;
char *ep, *p;
long tmp;
if ((s = strchr(s, ':')) == NULL)
gerr(NULL);
for (++s; s != NULL;) {
p = strsep(&s, ":\0");
if (!p || !*p)
break;
if (!(ep = strchr(p, '=')))
gerr(p);
*ep++ = '\0';
(void)sscanf(ep, "%lx", (u_long *)&tmp);
#define CHK(s) (*p == s[0] && !strcmp(p, s))
if (CHK("cflag")) {
tp->c_cflag = tmp;
continue;
}
if (CHK("iflag")) {
tp->c_iflag = tmp;
continue;
}
if (CHK("ispeed")) {
(void)sscanf(ep, "%ld", &tmp);
tp->c_ispeed = tmp;
continue;
}
if (CHK("lflag")) {
tp->c_lflag = tmp;
continue;
}
if (CHK("oflag")) {
tp->c_oflag = tmp;
continue;
}
if (CHK("ospeed")) {
(void)sscanf(ep, "%ld", &tmp);
tp->c_ospeed = tmp;
continue;
}
for (cp = cchars1; cp->name != NULL; ++cp)
if (CHK(cp->name)) {
if (cp->sub == VMIN || cp->sub == VTIME)
(void)sscanf(ep, "%ld", &tmp);
tp->c_cc[cp->sub] = tmp;
break;
}
if (cp->name == NULL)
gerr(p);
}
}