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
35 static 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 */
59 const 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
81 const struct cchar cchars2[] = {
82 { "brk", VEOL, CEOL },
83 { "flush", VDISCARD, CDISCARD },
84 { "rprnt", VREPRINT, CREPRINT },
85 { .name = NULL },
86 };
87
88 static int c_cchar(const void *, const void *);
89
90 static int
c_cchar(const void * a,const void * b)91 c_cchar(const void *a, const void *b)
92 {
93 return (strcmp(((const struct cchar *)a)->name,
94 ((const struct cchar *)b)->name));
95 }
96
97 int
csearch(char *** argvp,struct info * ip)98 csearch(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