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[] = "@(#)print.c	8.6 (Berkeley) 4/16/94";
33 #endif
34 #endif /* not lint */
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD: stable/12/bin/stty/print.c 314436 2017-02-28 23:42:47Z imp $");
37 
38 #include <sys/types.h>
39 
40 #include <stddef.h>
41 #include <stdio.h>
42 #include <string.h>
43 
44 #include "stty.h"
45 #include "extern.h"
46 
47 static void  binit(const char *);
48 static void  bput(const char *);
49 static const char *ccval(struct cchar *, int);
50 
51 void
print(struct termios * tp,struct winsize * wp,int ldisc,enum FMT fmt)52 print(struct termios *tp, struct winsize *wp, int ldisc, enum FMT fmt)
53 {
54 	struct cchar *p;
55 	long tmp;
56 	u_char *cc;
57 	int cnt, ispeed, ospeed;
58 	char buf1[100], buf2[100];
59 
60 	cnt = 0;
61 
62 	/* Line discipline. */
63 	if (ldisc != TTYDISC) {
64 		switch(ldisc) {
65 		case SLIPDISC:
66 			cnt += printf("slip disc; ");
67 			break;
68 		case PPPDISC:
69 			cnt += printf("ppp disc; ");
70 			break;
71 		default:
72 			cnt += printf("#%d disc; ", ldisc);
73 			break;
74 		}
75 	}
76 
77 	/* Line speed. */
78 	ispeed = cfgetispeed(tp);
79 	ospeed = cfgetospeed(tp);
80 	if (ispeed != ospeed)
81 		cnt +=
82 		    printf("ispeed %d baud; ospeed %d baud;", ispeed, ospeed);
83 	else
84 		cnt += printf("speed %d baud;", ispeed);
85 	if (fmt >= BSD)
86 		cnt += printf(" %d rows; %d columns;", wp->ws_row, wp->ws_col);
87 	if (cnt)
88 		(void)printf("\n");
89 
90 #define	on(f)	((tmp & (f)) != 0)
91 #define put(n, f, d) \
92 	if (fmt >= BSD || on(f) != (d)) \
93 		bput((n) + on(f));
94 
95 	/* "local" flags */
96 	tmp = tp->c_lflag;
97 	binit("lflags");
98 	put("-icanon", ICANON, 1);
99 	put("-isig", ISIG, 1);
100 	put("-iexten", IEXTEN, 1);
101 	put("-echo", ECHO, 1);
102 	put("-echoe", ECHOE, 0);
103 	put("-echok", ECHOK, 0);
104 	put("-echoke", ECHOKE, 0);
105 	put("-echonl", ECHONL, 0);
106 	put("-echoctl", ECHOCTL, 0);
107 	put("-echoprt", ECHOPRT, 0);
108 	put("-altwerase", ALTWERASE, 0);
109 	put("-noflsh", NOFLSH, 0);
110 	put("-tostop", TOSTOP, 0);
111 	put("-flusho", FLUSHO, 0);
112 	put("-pendin", PENDIN, 0);
113 	put("-nokerninfo", NOKERNINFO, 0);
114 	put("-extproc", EXTPROC, 0);
115 
116 	/* input flags */
117 	tmp = tp->c_iflag;
118 	binit("iflags");
119 	put("-istrip", ISTRIP, 0);
120 	put("-icrnl", ICRNL, 1);
121 	put("-inlcr", INLCR, 0);
122 	put("-igncr", IGNCR, 0);
123 	put("-ixon", IXON, 1);
124 	put("-ixoff", IXOFF, 0);
125 	put("-ixany", IXANY, 1);
126 	put("-imaxbel", IMAXBEL, 1);
127 	put("-ignbrk", IGNBRK, 0);
128 	put("-brkint", BRKINT, 1);
129 	put("-inpck", INPCK, 0);
130 	put("-ignpar", IGNPAR, 0);
131 	put("-parmrk", PARMRK, 0);
132 
133 	/* output flags */
134 	tmp = tp->c_oflag;
135 	binit("oflags");
136 	put("-opost", OPOST, 1);
137 	put("-onlcr", ONLCR, 1);
138 	put("-ocrnl", OCRNL, 0);
139 	switch(tmp&TABDLY) {
140 	case TAB0:
141 		bput("tab0");
142 		break;
143 	case TAB3:
144 		bput("tab3");
145 		break;
146 	}
147 	put("-onocr", ONOCR, 0);
148 	put("-onlret", ONLRET, 0);
149 
150 	/* control flags (hardware state) */
151 	tmp = tp->c_cflag;
152 	binit("cflags");
153 	put("-cread", CREAD, 1);
154 	switch(tmp&CSIZE) {
155 	case CS5:
156 		bput("cs5");
157 		break;
158 	case CS6:
159 		bput("cs6");
160 		break;
161 	case CS7:
162 		bput("cs7");
163 		break;
164 	case CS8:
165 		bput("cs8");
166 		break;
167 	}
168 	bput("-parenb" + on(PARENB));
169 	put("-parodd", PARODD, 0);
170 	put("-hupcl", HUPCL, 1);
171 	put("-clocal", CLOCAL, 0);
172 	put("-cstopb", CSTOPB, 0);
173 	switch(tmp & (CCTS_OFLOW | CRTS_IFLOW)) {
174 	case CCTS_OFLOW:
175 		bput("ctsflow");
176 		break;
177 	case CRTS_IFLOW:
178 		bput("rtsflow");
179 		break;
180 	default:
181 		put("-crtscts", CCTS_OFLOW | CRTS_IFLOW, 0);
182 		break;
183 	}
184 	put("-dsrflow", CDSR_OFLOW, 0);
185 	put("-dtrflow", CDTR_IFLOW, 0);
186 	put("-mdmbuf", MDMBUF, 0);	/* XXX mdmbuf ==  dtrflow */
187 
188 	/* special control characters */
189 	cc = tp->c_cc;
190 	if (fmt == POSIX) {
191 		binit("cchars");
192 		for (p = cchars1; p->name; ++p) {
193 			(void)snprintf(buf1, sizeof(buf1), "%s = %s;",
194 			    p->name, ccval(p, cc[p->sub]));
195 			bput(buf1);
196 		}
197 		binit(NULL);
198 	} else {
199 		binit(NULL);
200 		for (p = cchars1, cnt = 0; p->name; ++p) {
201 			if (fmt != BSD && cc[p->sub] == p->def)
202 				continue;
203 #define	WD	"%-8s"
204 			(void)snprintf(buf1 + cnt * 8, sizeof(buf1) - cnt * 8,
205 			    WD, p->name);
206 			(void)snprintf(buf2 + cnt * 8, sizeof(buf2) - cnt * 8,
207 			    WD, ccval(p, cc[p->sub]));
208 			if (++cnt == LINELENGTH / 8) {
209 				cnt = 0;
210 				(void)printf("%s\n", buf1);
211 				(void)printf("%s\n", buf2);
212 			}
213 		}
214 		if (cnt) {
215 			(void)printf("%s\n", buf1);
216 			(void)printf("%s\n", buf2);
217 		}
218 	}
219 }
220 
221 static int col;
222 static const char *label;
223 
224 static void
binit(const char * lb)225 binit(const char *lb)
226 {
227 
228 	if (col) {
229 		(void)printf("\n");
230 		col = 0;
231 	}
232 	label = lb;
233 }
234 
235 static void
bput(const char * s)236 bput(const char *s)
237 {
238 
239 	if (col == 0) {
240 		col = printf("%s: %s", label, s);
241 		return;
242 	}
243 	if ((col + strlen(s)) > LINELENGTH) {
244 		(void)printf("\n\t");
245 		col = printf("%s", s) + 8;
246 		return;
247 	}
248 	col += printf(" %s", s);
249 }
250 
251 static const char *
ccval(struct cchar * p,int c)252 ccval(struct cchar *p, int c)
253 {
254 	static char buf[5];
255 	char *bp;
256 
257 	if (p->sub == VMIN || p->sub == VTIME) {
258 		(void)snprintf(buf, sizeof(buf), "%d", c);
259 		return (buf);
260 	}
261 	if (c == _POSIX_VDISABLE)
262 		return ("<undef>");
263 	bp = buf;
264 	if (c & 0200) {
265 		*bp++ = 'M';
266 		*bp++ = '-';
267 		c &= 0177;
268 	}
269 	if (c == 0177) {
270 		*bp++ = '^';
271 		*bp++ = '?';
272 	}
273 	else if (c < 040) {
274 		*bp++ = '^';
275 		*bp++ = c + '@';
276 	}
277 	else
278 		*bp++ = c;
279 	*bp = '\0';
280 	return (buf);
281 }
282