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. 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 #include <sys/types.h>
31
32 #include <err.h>
33 #include <limits.h>
34 #include <stdlib.h>
35 #include <string.h>
36
37 #include "stty.h"
38 #include "extern.h"
39
40 static int c_cchar(const void *, const void *);
41
42 /*
43 * Special control characters.
44 *
45 * Cchars1 are the standard names, cchars2 are the old aliases.
46 * The first are displayed, but both are recognized on the
47 * command line.
48 */
49 struct cchar cchars1[] = {
50 { "discard", VDISCARD, CDISCARD },
51 { "dsusp", VDSUSP, CDSUSP },
52 { "eof", VEOF, CEOF },
53 { "eol", VEOL, CEOL },
54 { "eol2", VEOL2, CEOL },
55 { "erase", VERASE, CERASE },
56 { "erase2", VERASE2, CERASE2 },
57 { "intr", VINTR, CINTR },
58 { "kill", VKILL, CKILL },
59 { "lnext", VLNEXT, CLNEXT },
60 { "min", VMIN, CMIN },
61 { "quit", VQUIT, CQUIT },
62 { "reprint", VREPRINT, CREPRINT },
63 { "start", VSTART, CSTART },
64 { "status", VSTATUS, CSTATUS },
65 { "stop", VSTOP, CSTOP },
66 { "susp", VSUSP, CSUSP },
67 { "time", VTIME, CTIME },
68 { "werase", VWERASE, CWERASE },
69 { NULL, 0, 0},
70 };
71
72 struct cchar cchars2[] = {
73 { "brk", VEOL, CEOL },
74 { "flush", VDISCARD, CDISCARD },
75 { "rprnt", VREPRINT, CREPRINT },
76 { NULL, 0, 0 },
77 };
78
79 static int
c_cchar(const void * a,const void * b)80 c_cchar(const void *a, const void *b)
81 {
82
83 return (strcmp(((const struct cchar *)a)->name, ((const struct cchar *)b)->name));
84 }
85
86 int
csearch(char *** argvp,struct info * ip)87 csearch(char ***argvp, struct info *ip)
88 {
89 struct cchar *cp, tmp;
90 long val;
91 char *arg, *ep, *name;
92
93 name = **argvp;
94
95 tmp.name = name;
96 if (!(cp = (struct cchar *)bsearch(&tmp, cchars1,
97 sizeof(cchars1)/sizeof(struct cchar) - 1, sizeof(struct cchar),
98 c_cchar)) && !(cp = (struct cchar *)bsearch(&tmp, cchars2,
99 sizeof(cchars2)/sizeof(struct cchar) - 1, sizeof(struct cchar),
100 c_cchar)))
101 return (0);
102
103 arg = *++*argvp;
104 if (!arg) {
105 warnx("option requires an argument -- %s", name);
106 usage();
107 }
108
109 #define CHK(s) (*arg == s[0] && !strcmp(arg, s))
110 if (CHK("undef") || CHK("<undef>"))
111 ip->t.c_cc[cp->sub] = _POSIX_VDISABLE;
112 else if (cp->sub == VMIN || cp->sub == VTIME) {
113 val = strtol(arg, &ep, 10);
114 if (val > UCHAR_MAX) {
115 warnx("maximum option value is %d -- %s",
116 UCHAR_MAX, name);
117 usage();
118 }
119 if (*ep != '\0') {
120 warnx("option requires a numeric argument -- %s", name);
121 usage();
122 }
123 ip->t.c_cc[cp->sub] = val;
124 } else if (arg[0] == '^')
125 ip->t.c_cc[cp->sub] = (arg[1] == '?') ? 0177 :
126 (arg[1] == '-') ? _POSIX_VDISABLE : arg[1] & 037;
127 else
128 ip->t.c_cc[cp->sub] = arg[0];
129 ip->set = 1;
130 return (1);
131 }
132