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 #ifndef lint
31 #if 0
32 static 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 <stdlib.h>
43 #include <string.h>
44
45 #include "stty.h"
46 #include "extern.h"
47
48 static int c_cchar(const void *, const void *);
49
50 /*
51 * Special control characters.
52 *
53 * Cchars1 are the standard names, cchars2 are the old aliases.
54 * The first are displayed, but both are recognized on the
55 * command line.
56 */
57 struct cchar cchars1[] = {
58 { "discard", VDISCARD, CDISCARD },
59 { "dsusp", VDSUSP, CDSUSP },
60 { "eof", VEOF, CEOF },
61 { "eol", VEOL, CEOL },
62 { "eol2", VEOL2, CEOL },
63 { "erase", VERASE, CERASE },
64 { "erase2", VERASE2, CERASE2 },
65 { "intr", VINTR, CINTR },
66 { "kill", VKILL, CKILL },
67 { "lnext", VLNEXT, CLNEXT },
68 { "min", VMIN, CMIN },
69 { "quit", VQUIT, CQUIT },
70 { "reprint", VREPRINT, CREPRINT },
71 { "start", VSTART, CSTART },
72 { "status", VSTATUS, CSTATUS },
73 { "stop", VSTOP, CSTOP },
74 { "susp", VSUSP, CSUSP },
75 { "time", VTIME, CTIME },
76 { "werase", VWERASE, CWERASE },
77 { NULL, 0, 0},
78 };
79
80 struct cchar cchars2[] = {
81 { "brk", VEOL, CEOL },
82 { "flush", VDISCARD, CDISCARD },
83 { "rprnt", VREPRINT, CREPRINT },
84 { NULL, 0, 0 },
85 };
86
87 static int
c_cchar(const void * a,const void * b)88 c_cchar(const void *a, const void *b)
89 {
90
91 return (strcmp(((const struct cchar *)a)->name, ((const struct cchar *)b)->name));
92 }
93
94 int
csearch(char *** argvp,struct info * ip)95 csearch(char ***argvp, struct info *ip)
96 {
97 struct cchar *cp, tmp;
98 long val;
99 char *arg, *ep, *name;
100
101 name = **argvp;
102
103 tmp.name = name;
104 if (!(cp = (struct cchar *)bsearch(&tmp, cchars1,
105 sizeof(cchars1)/sizeof(struct cchar) - 1, sizeof(struct cchar),
106 c_cchar)) && !(cp = (struct cchar *)bsearch(&tmp, cchars2,
107 sizeof(cchars2)/sizeof(struct cchar) - 1, sizeof(struct cchar),
108 c_cchar)))
109 return (0);
110
111 arg = *++*argvp;
112 if (!arg) {
113 warnx("option requires an argument -- %s", name);
114 usage();
115 }
116
117 #define CHK(s) (*arg == s[0] && !strcmp(arg, s))
118 if (CHK("undef") || CHK("<undef>"))
119 ip->t.c_cc[cp->sub] = _POSIX_VDISABLE;
120 else if (cp->sub == VMIN || cp->sub == VTIME) {
121 val = strtol(arg, &ep, 10);
122 if (val > UCHAR_MAX) {
123 warnx("maximum option value is %d -- %s",
124 UCHAR_MAX, name);
125 usage();
126 }
127 if (*ep != '\0') {
128 warnx("option requires a numeric argument -- %s", name);
129 usage();
130 }
131 ip->t.c_cc[cp->sub] = val;
132 } else if (arg[0] == '^')
133 ip->t.c_cc[cp->sub] = (arg[1] == '?') ? 0177 :
134 (arg[1] == '-') ? _POSIX_VDISABLE : arg[1] & 037;
135 else
136 ip->t.c_cc[cp->sub] = arg[0];
137 ip->set = 1;
138 return (1);
139 }
140