NetBSD/bin/stty/cchar.c

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/*-
* Copyright (c) 1991 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 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
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/*static char sccsid[] = "from: @(#)cchar.c 5.4 (Berkeley) 6/10/91";*/
static char rcsid[] = "$Id: cchar.c,v 1.7 1994/03/23 04:05:24 mycroft Exp $";
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#endif /* not lint */
#include <sys/types.h>
#include <err.h>
#include <limits.h>
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#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include "stty.h"
#include "extern.h"
/*
* Special control characters.
*
* Cchars1 are the standard names, cchars2 are the old aliases.
* The first are displayed, but both are recognized on the
* command line.
*/
struct cchar cchars1[] = {
"discard", VDISCARD, CDISCARD,
"dsusp", VDSUSP, CDSUSP,
"eof", VEOF, CEOF,
"eol", VEOL, CEOL,
"eol2", VEOL2, CEOL,
"erase", VERASE, CERASE,
"intr", VINTR, CINTR,
"kill", VKILL, CKILL,
"lnext", VLNEXT, CLNEXT,
"min", VMIN, CMIN,
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"quit", VQUIT, CQUIT,
"reprint", VREPRINT, CREPRINT,
"start", VSTART, CSTART,
"status", VSTATUS, CSTATUS,
"stop", VSTOP, CSTOP,
"susp", VSUSP, CSUSP,
"time", VTIME, CTIME,
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"werase", VWERASE, CWERASE,
NULL,
};
struct cchar cchars2[] = {
"brk", VEOL, CEOL,
"flush", VDISCARD, CDISCARD,
"rprnt", VREPRINT, CREPRINT,
"xoff", VSTOP, CSTOP,
"xon", VSTART, CSTART,
NULL,
};
csearch(argvp, ip)
char ***argvp;
struct info *ip;
{
register struct cchar *cp;
struct cchar tmp;
long val;
char *arg, *ep, *name;
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static int c_cchar __P((const void *, const void *));
name = **argvp;
tmp.name = name;
if (!(cp = (struct cchar *)bsearch(&tmp, cchars1,
sizeof(cchars1)/sizeof(struct cchar) - 1, sizeof(struct cchar),
c_cchar)) && !(cp = (struct cchar *)bsearch(&tmp, cchars1,
sizeof(cchars1)/sizeof(struct cchar) - 1, sizeof(struct cchar),
c_cchar)))
return(0);
arg = *++*argvp;
if (!arg) {
warnx("option requires an argument -- %s", name);
usage();
}
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#define CHK(s) (*arg == s[0] && !strcmp(arg, s))
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if (CHK("undef") || CHK("<undef>"))
ip->t.c_cc[cp->sub] = _POSIX_VDISABLE;
else if (cp->sub == VMIN || cp->sub == VTIME) {
val = strtol(arg, &ep, 10);
if (val == _POSIX_VDISABLE) {
warnx("value of %ld would disable the option -- %s",
val, name);
usage();
}
if (val > UCHAR_MAX) {
warnx("maximum option value is %d -- %s",
UCHAR_MAX, name);
usage();
}
if (*ep != '\0') {
warnx("option requires a numeric argument -- %s", name);
usage();
}
ip->t.c_cc[cp->sub] = val;
} else if (arg[0] == '^')
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ip->t.c_cc[cp->sub] = (arg[1] == '?') ? 0177 :
(arg[1] == '-') ? _POSIX_VDISABLE : arg[1] & 037;
else
ip->t.c_cc[cp->sub] = arg[0];
ip->set = 1;
return(1);
}
static
c_cchar(a, b)
const void *a, *b;
{
return(strcmp(((struct cchar *)a)->name, ((struct cchar *)b)->name));
}