cchar.c revision 50471 
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 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#ifndef lint
35#if 0
36static char sccsid[] = "@(#)cchar.c	8.5 (Berkeley) 4/2/94";
37#endif
38static const char rcsid[] =
39  "$FreeBSD: head/bin/stty/cchar.c 50471 1999-08-27 23:15:48Z peter $";
40#endif /* not lint */
41
42#include <sys/types.h>
43
44#include <err.h>
45#include <limits.h>
46#include <stddef.h>
47#include <stdlib.h>
48#include <string.h>
49
50#include "stty.h"
51#include "extern.h"
52
53/*
54 * Special control characters.
55 *
56 * Cchars1 are the standard names, cchars2 are the old aliases.
57 * The first are displayed, but both are recognized on the
58 * command line.
59 */
60struct cchar cchars1[] = {
61	{ "discard",	VDISCARD, 	CDISCARD },
62	{ "dsusp", 	VDSUSP,		CDSUSP },
63	{ "eof",	VEOF,		CEOF },
64	{ "eol",	VEOL,		CEOL },
65	{ "eol2",	VEOL2,		CEOL },
66	{ "erase",	VERASE,		CERASE },
67	{ "intr",	VINTR,		CINTR },
68	{ "kill",	VKILL,		CKILL },
69	{ "lnext",	VLNEXT,		CLNEXT },
70	{ "min",	VMIN,		CMIN },
71	{ "quit",	VQUIT,		CQUIT },
72	{ "reprint",	VREPRINT, 	CREPRINT },
73	{ "start",	VSTART,		CSTART },
74	{ "status",	VSTATUS, 	CSTATUS },
75	{ "stop",	VSTOP,		CSTOP },
76	{ "susp",	VSUSP,		CSUSP },
77	{ "time",	VTIME,		CTIME },
78	{ "werase",	VWERASE,	CWERASE },
79	{ NULL },
80};
81
82struct cchar cchars2[] = {
83	{ "brk",	VEOL,		CEOL },
84	{ "flush",	VDISCARD, 	CDISCARD },
85	{ "rprnt",	VREPRINT, 	CREPRINT },
86	{ NULL },
87};
88
89static int
90c_cchar(a, b)
91        const void *a, *b;
92{
93
94        return (strcmp(((struct cchar *)a)->name, ((struct cchar *)b)->name));
95}
96
97int
98csearch(argvp, ip)
99	char ***argvp;
100	struct info *ip;
101{
102	struct cchar *cp, tmp;
103	long val;
104	char *arg, *ep, *name;
105
106	name = **argvp;
107
108	tmp.name = name;
109	if (!(cp = (struct cchar *)bsearch(&tmp, cchars1,
110	    sizeof(cchars1)/sizeof(struct cchar) - 1, sizeof(struct cchar),
111	    c_cchar)) && !(cp = (struct cchar *)bsearch(&tmp, cchars2,
112	    sizeof(cchars2)/sizeof(struct cchar) - 1, sizeof(struct cchar),
113	    c_cchar)))
114		return (0);
115
116	arg = *++*argvp;
117	if (!arg) {
118		warnx("option requires an argument -- %s", name);
119		usage();
120	}
121
122#define CHK(s)  (*arg == s[0] && !strcmp(arg, s))
123	if (CHK("undef") || CHK("<undef>"))
124		ip->t.c_cc[cp->sub] = _POSIX_VDISABLE;
125	else if (cp->sub == VMIN || cp->sub == VTIME) {
126		val = strtol(arg, &ep, 10);
127		if (val > UCHAR_MAX) {
128			warnx("maximum option value is %d -- %s",
129			    UCHAR_MAX, name);
130			usage();
131		}
132		if (*ep != '\0') {
133			warnx("option requires a numeric argument -- %s", name);
134			usage();
135		}
136		ip->t.c_cc[cp->sub] = val;
137	} else if (arg[0] == '^')
138		ip->t.c_cc[cp->sub] = (arg[1] == '?') ? 0177 :
139		    (arg[1] == '-') ? _POSIX_VDISABLE : arg[1] & 037;
140	else
141		ip->t.c_cc[cp->sub] = arg[0];
142	ip->set = 1;
143	return (1);
144}
145