1/*-
2 * Copyright (c) 1991, 1993, 1994
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#ifndef lint
31#if 0
32static char sccsid[] = "@(#)cchar.c	8.5 (Berkeley) 4/2/94";
33#endif
34#endif /* not lint */
35#include <sys/cdefs.h>
36__FBSDID("$FreeBSD$");
37
38#include <sys/types.h>
39
40#include <err.h>
41#include <limits.h>
42#include <stddef.h>
43#include <stdlib.h>
44#include <string.h>
45
46#include "stty.h"
47#include "extern.h"
48
49static int c_cchar(const void *, const void *);
50
51/*
52 * Special control characters.
53 *
54 * Cchars1 are the standard names, cchars2 are the old aliases.
55 * The first are displayed, but both are recognized on the
56 * command line.
57 */
58struct cchar cchars1[] = {
59	{ "discard",	VDISCARD, 	CDISCARD },
60	{ "dsusp", 	VDSUSP,		CDSUSP },
61	{ "eof",	VEOF,		CEOF },
62	{ "eol",	VEOL,		CEOL },
63	{ "eol2",	VEOL2,		CEOL },
64	{ "erase",	VERASE,		CERASE },
65	{ "erase2",	VERASE2,	CERASE2 },
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	{ NULL,		0,		0},
79};
80
81struct cchar cchars2[] = {
82	{ "brk",	VEOL,		CEOL },
83	{ "flush",	VDISCARD, 	CDISCARD },
84	{ "rprnt",	VREPRINT, 	CREPRINT },
85	{ NULL,		0,		0 },
86};
87
88static int
89c_cchar(const void *a, const void *b)
90{
91
92        return (strcmp(((const struct cchar *)a)->name, ((const struct cchar *)b)->name));
93}
94
95int
96csearch(char ***argvp, struct info *ip)
97{
98	struct cchar *cp, tmp;
99	long val;
100	char *arg, *ep, *name;
101
102	name = **argvp;
103
104	tmp.name = name;
105	if (!(cp = (struct cchar *)bsearch(&tmp, cchars1,
106	    sizeof(cchars1)/sizeof(struct cchar) - 1, sizeof(struct cchar),
107	    c_cchar)) && !(cp = (struct cchar *)bsearch(&tmp, cchars2,
108	    sizeof(cchars2)/sizeof(struct cchar) - 1, sizeof(struct cchar),
109	    c_cchar)))
110		return (0);
111
112	arg = *++*argvp;
113	if (!arg) {
114		warnx("option requires an argument -- %s", name);
115		usage();
116	}
117
118#define CHK(s)  (*arg == s[0] && !strcmp(arg, s))
119	if (CHK("undef") || CHK("<undef>"))
120		ip->t.c_cc[cp->sub] = _POSIX_VDISABLE;
121	else if (cp->sub == VMIN || cp->sub == VTIME) {
122		val = strtol(arg, &ep, 10);
123		if (val > UCHAR_MAX) {
124			warnx("maximum option value is %d -- %s",
125			    UCHAR_MAX, name);
126			usage();
127		}
128		if (*ep != '\0') {
129			warnx("option requires a numeric argument -- %s", name);
130			usage();
131		}
132		ip->t.c_cc[cp->sub] = val;
133	} else if (arg[0] == '^')
134		ip->t.c_cc[cp->sub] = (arg[1] == '?') ? 0177 :
135		    (arg[1] == '-') ? _POSIX_VDISABLE : arg[1] & 037;
136	else
137		ip->t.c_cc[cp->sub] = arg[0];
138	ip->set = 1;
139	return (1);
140}
141