1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
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/types.h>
33
34 #include <err.h>
35 #include <limits.h>
36 #include <stdlib.h>
37 #include <string.h>
38
39 #include "stty.h"
40 #include "extern.h"
41
42 static int c_cchar(const void *, const void *);
43
44 /*
45 * Special control characters.
46 *
47 * Cchars1 are the standard names, cchars2 are the old aliases.
48 * The first are displayed, but both are recognized on the
49 * command line.
50 */
51 struct cchar cchars1[] = {
52 { "discard", VDISCARD, CDISCARD },
53 { "dsusp", VDSUSP, CDSUSP },
54 { "eof", VEOF, CEOF },
55 { "eol", VEOL, CEOL },
56 { "eol2", VEOL2, CEOL },
57 { "erase", VERASE, CERASE },
58 { "erase2", VERASE2, CERASE2 },
59 { "intr", VINTR, CINTR },
60 { "kill", VKILL, CKILL },
61 { "lnext", VLNEXT, CLNEXT },
62 { "min", VMIN, CMIN },
63 { "quit", VQUIT, CQUIT },
64 { "reprint", VREPRINT, CREPRINT },
65 { "start", VSTART, CSTART },
66 { "status", VSTATUS, CSTATUS },
67 { "stop", VSTOP, CSTOP },
68 { "susp", VSUSP, CSUSP },
69 { "time", VTIME, CTIME },
70 { "werase", VWERASE, CWERASE },
71 { NULL, 0, 0},
72 };
73
74 struct cchar cchars2[] = {
75 { "brk", VEOL, CEOL },
76 { "flush", VDISCARD, CDISCARD },
77 { "rprnt", VREPRINT, CREPRINT },
78 { NULL, 0, 0 },
79 };
80
81 static int
c_cchar(const void * a,const void * b)82 c_cchar(const void *a, const void *b)
83 {
84
85 return (strcmp(((const struct cchar *)a)->name, ((const struct cchar *)b)->name));
86 }
87
88 int
csearch(char *** argvp,struct info * ip)89 csearch(char ***argvp, struct info *ip)
90 {
91 struct cchar *cp, tmp;
92 long val;
93 char *arg, *ep, *name;
94
95 name = **argvp;
96
97 tmp.name = name;
98 if (!(cp = (struct cchar *)bsearch(&tmp, cchars1,
99 sizeof(cchars1)/sizeof(struct cchar) - 1, sizeof(struct cchar),
100 c_cchar)) && !(cp = (struct cchar *)bsearch(&tmp, cchars2,
101 sizeof(cchars2)/sizeof(struct cchar) - 1, sizeof(struct cchar),
102 c_cchar)))
103 return (0);
104
105 arg = *++*argvp;
106 if (!arg) {
107 warnx("option requires an argument -- %s", name);
108 usage();
109 }
110
111 #define CHK(s) (*arg == s[0] && !strcmp(arg, s))
112 if (CHK("undef") || CHK("<undef>"))
113 ip->t.c_cc[cp->sub] = _POSIX_VDISABLE;
114 else if (cp->sub == VMIN || cp->sub == VTIME) {
115 val = strtol(arg, &ep, 10);
116 if (val > UCHAR_MAX) {
117 warnx("maximum option value is %d -- %s",
118 UCHAR_MAX, name);
119 usage();
120 }
121 if (*ep != '\0') {
122 warnx("option requires a numeric argument -- %s", name);
123 usage();
124 }
125 ip->t.c_cc[cp->sub] = val;
126 } else if (arg[0] == '^')
127 ip->t.c_cc[cp->sub] = (arg[1] == '?') ? 0177 :
128 (arg[1] == '-') ? _POSIX_VDISABLE : arg[1] & 037;
129 else
130 ip->t.c_cc[cp->sub] = arg[0];
131 ip->set = 1;
132 return (1);
133 }
134