1 /* $NetBSD: modes.c,v 1.18 2015/05/01 17:01:08 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[] = "@(#)modes.c 8.3 (Berkeley) 4/2/94";
36 #else
37 __RCSID("$NetBSD: modes.c,v 1.18 2015/05/01 17:01:08 christos Exp $");
38 #endif
39 #endif /* not lint */
40
41 #include <sys/types.h>
42
43 #include <stddef.h>
44 #include <string.h>
45 #include <stdbool.h>
46
47 #include "stty.h"
48 #include "extern.h"
49
50 struct modes {
51 const char *name;
52 tcflag_t flag;
53 };
54
55 struct specialmodes {
56 const char *name;
57 tcflag_t set;
58 tcflag_t unset;
59 };
60
61 /*
62 * The code in optlist() depends on minus options following regular
63 * options, i.e. "foo" must immediately precede "-foo".
64 */
65 const struct modes cmodes[] = {
66 { "cstopb", CSTOPB },
67 { "cread", CREAD },
68 { "parenb", PARENB },
69 { "parodd", PARODD },
70 { "hupcl", HUPCL },
71 { "hup", HUPCL },
72 { "clocal", CLOCAL },
73 { "crtscts", CRTSCTS },
74 { "mdmbuf", MDMBUF },
75 { "cdtrcts", CDTRCTS },
76 { .name = NULL },
77 };
78
79 const struct specialmodes cspecialmodes[] = {
80 { "cs5", CS5, CSIZE },
81 { "cs6", CS6, CSIZE },
82 { "cs7", CS7, CSIZE },
83 { "cs8", CS8, CSIZE },
84 { "parity", PARENB | CS7, PARODD | CSIZE },
85 { "-parity", CS8, PARODD | PARENB | CSIZE },
86 { "evenp", PARENB | CS7, PARODD | CSIZE },
87 { "-evenp", CS8, PARODD | PARENB | CSIZE },
88 { "oddp", PARENB | CS7 | PARODD, CSIZE },
89 { "-oddp", CS8, PARODD | PARENB | CSIZE },
90 { "pass8", CS8, PARODD | PARENB | CSIZE },
91 { "-pass8", PARENB | CS7, PARODD | CSIZE },
92 { .name = NULL },
93 };
94
95 const struct modes imodes[] = {
96 { "ignbrk", IGNBRK },
97 { "brkint", BRKINT },
98 { "ignpar", IGNPAR },
99 { "parmrk", PARMRK },
100 { "inpck", INPCK },
101 { "istrip", ISTRIP },
102 { "inlcr", INLCR },
103 { "igncr", IGNCR },
104 { "icrnl", ICRNL },
105 { "ixon", IXON },
106 { "flow", IXON },
107 { "ixoff", IXOFF },
108 { "tandem", IXOFF },
109 { "ixany", IXANY },
110 { "imaxbel", IMAXBEL },
111 { .name = NULL },
112 };
113
114 const struct specialmodes ispecialmodes[] = {
115 { "decctlq", 0, IXANY },
116 { "-decctlq", IXANY, 0 },
117 { .name = NULL },
118 };
119
120 const struct modes lmodes[] = {
121 { "echo", ECHO },
122 { "echoe", ECHOE },
123 { "crterase", ECHOE },
124 { "crtbs", ECHOE }, /* crtbs not supported, close enough */
125 { "echok", ECHOK },
126 { "echoke", ECHOKE },
127 { "crtkill", ECHOKE },
128 { "altwerase", ALTWERASE },
129 { "iexten", IEXTEN },
130 { "echonl", ECHONL },
131 { "echoctl", ECHOCTL },
132 { "ctlecho", ECHOCTL },
133 { "echoprt", ECHOPRT },
134 { "prterase", ECHOPRT },
135 { "isig", ISIG },
136 { "icanon", ICANON },
137 { "noflsh", NOFLSH },
138 { "tostop", TOSTOP },
139 { "flusho", FLUSHO },
140 { "pendin", PENDIN },
141 { "nokerninfo", NOKERNINFO },
142 { .name = NULL },
143 };
144
145 const struct specialmodes lspecialmodes[] = {
146 { "crt", ECHOE|ECHOKE|ECHOCTL, ECHOK|ECHOPRT },
147 { "-crt", ECHOK, ECHOE|ECHOKE|ECHOCTL },
148 { "newcrt", ECHOE|ECHOKE|ECHOCTL, ECHOK|ECHOPRT },
149 { "-newcrt", ECHOK, ECHOE|ECHOKE|ECHOCTL },
150 { "kerninfo", 0, NOKERNINFO },
151 { "-kerninfo", NOKERNINFO, 0 },
152 { .name = NULL },
153 };
154
155 const struct modes omodes[] = {
156 { "opost", OPOST },
157 { "onlcr", ONLCR },
158 { "ocrnl", OCRNL },
159 { "oxtabs", OXTABS },
160 { "onocr", ONOCR },
161 { "onlret", ONLRET },
162 { .name = NULL },
163 };
164
165 const struct specialmodes ospecialmodes[] = {
166 { "litout", 0, OPOST },
167 { "-litout", OPOST, 0 },
168 { "tabs", 0, OXTABS }, /* "preserve" tabs */
169 { "-tabs", OXTABS, 0 },
170 { .name = NULL },
171 };
172
173 #define CHK(s) (!strcmp(name, s))
174
175 static int
modeset(const char * name,const struct modes * mp,const struct specialmodes * smp,tcflag_t * f)176 modeset(const char *name, const struct modes *mp,
177 const struct specialmodes *smp, tcflag_t *f)
178 {
179 bool neg;
180
181 for (; smp->name; ++smp)
182 if (CHK(smp->name)) {
183 *f &= ~smp->unset;
184 *f |= smp->set;
185 return 1;
186 }
187
188 if ((neg = (*name == '-')))
189 name++;
190
191 for (; mp->name; ++mp)
192 if (CHK(mp->name)) {
193 if (neg)
194 *f &= ~mp->flag;
195 else
196 *f |= mp->flag;
197 return 1;
198 }
199
200 return 0;
201 }
202
203 int
msearch(char *** argvp,struct info * ip)204 msearch(char ***argvp, struct info *ip)
205 {
206 const char *name = **argvp;
207
208 if (modeset(name, cmodes, cspecialmodes, &ip->t.c_cflag))
209 goto out;
210
211 if (modeset(name, imodes, ispecialmodes, &ip->t.c_iflag))
212 goto out;
213
214 if (modeset(name, lmodes, lspecialmodes, &ip->t.c_lflag))
215 goto out;
216
217 if (modeset(name, omodes, ospecialmodes, &ip->t.c_oflag))
218 goto out;
219
220 return 0;
221 out:
222 ip->set = 1;
223 return 1;
224 }
225