1/* $NetBSD: cchar.c,v 1.16 2006/10/16 00:37:55 christos Exp $ */
2
3/*-
4 * Copyright (c) 1991, 1993, 1994
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33#ifndef lint
34#if 0
35static char sccsid[] = "@(#)cchar.c	8.5 (Berkeley) 4/2/94";
36#else
37__RCSID("$NetBSD: cchar.c,v 1.16 2006/10/16 00:37:55 christos Exp $");
38#endif
39#endif /* not lint */
40
41#include <sys/types.h>
42
43#include <err.h>
44#include <limits.h>
45#include <stddef.h>
46#include <stdlib.h>
47#include <string.h>
48
49#include "stty.h"
50#include "extern.h"
51
52/*
53 * Special control characters.
54 *
55 * Cchars1 are the standard names, cchars2 are the old aliases.
56 * The first are displayed, but both are recognized on the
57 * command line.
58 */
59const struct cchar cchars1[] = {
60	{ "discard",	VDISCARD, 	CDISCARD },
61	{ "dsusp", 	VDSUSP,		CDSUSP },
62	{ "eof",	VEOF,		CEOF },
63	{ "eol",	VEOL,		CEOL },
64	{ "eol2",	VEOL2,		CEOL },
65	{ "erase",	VERASE,		CERASE },
66	{ "intr",	VINTR,		CINTR },
67	{ "kill",	VKILL,		CKILL },
68	{ "lnext",	VLNEXT,		CLNEXT },
69	{ "min",	VMIN,		CMIN },
70	{ "quit",	VQUIT,		CQUIT },
71	{ "reprint",	VREPRINT, 	CREPRINT },
72	{ "start",	VSTART,		CSTART },
73	{ "status",	VSTATUS, 	CSTATUS },
74	{ "stop",	VSTOP,		CSTOP },
75	{ "susp",	VSUSP,		CSUSP },
76	{ "time",	VTIME,		CTIME },
77	{ "werase",	VWERASE,	CWERASE },
78	{ .name = NULL },
79};
80
81const struct cchar cchars2[] = {
82	{ "brk",	VEOL,		CEOL },
83	{ "flush",	VDISCARD, 	CDISCARD },
84	{ "rprnt",	VREPRINT, 	CREPRINT },
85	{ .name = NULL },
86};
87
88static int c_cchar(const void *, const void *);
89
90static int
91c_cchar(const void *a, const void *b)
92{
93        return (strcmp(((const struct cchar *)a)->name,
94	    ((const struct cchar *)b)->name));
95}
96
97int
98csearch(char ***argvp, struct info *ip)
99{
100	struct cchar *cp, tmp;
101	long val;
102	char *arg, *ep, *name;
103
104	name = **argvp;
105
106	tmp.name = name;
107	if (!(cp = (struct cchar *)bsearch(&tmp, cchars1,
108	    sizeof(cchars1)/sizeof(cchars1[0]) - 1, sizeof(cchars1[0]),
109	    c_cchar)) &&
110	    !(cp = (struct cchar *)bsearch(&tmp, cchars2,
111	    sizeof(cchars2)/sizeof(cchars2[0]) - 1, sizeof(cchars2[0]),
112	    c_cchar)))
113		return (0);
114
115	arg = *++*argvp;
116	if (!arg) {
117		warnx("option requires an argument -- %s", name);
118		usage();
119	}
120
121#define CHK(s)  (*arg == s[0] && !strcmp(arg, s))
122	if (CHK("undef") || CHK("<undef>"))
123		ip->t.c_cc[cp->sub] = _POSIX_VDISABLE;
124	else if (cp->sub == VMIN || cp->sub == VTIME) {
125		val = strtol(arg, &ep, 10);
126		if (val == _POSIX_VDISABLE) {
127			warnx("value of %ld would disable the option -- %s",
128			    val, name);
129			usage();
130		}
131		if (val > UCHAR_MAX) {
132			warnx("maximum option value is %d -- %s",
133			    UCHAR_MAX, name);
134			usage();
135		}
136		if (*ep != '\0') {
137			warnx("option requires a numeric argument -- %s", name);
138			usage();
139		}
140		ip->t.c_cc[cp->sub] = (cc_t)val;
141	} else if (arg[0] == '^')
142		ip->t.c_cc[cp->sub] = (arg[1] == '?') ? 0177 :
143		    (arg[1] == '-') ? _POSIX_VDISABLE : arg[1] & 037;
144	else
145		ip->t.c_cc[cp->sub] = arg[0];
146	ip->set = 1;
147	return (1);
148}
149