1 /* $OpenBSD: subr.c,v 1.29 2024/11/09 11:22:18 miod Exp $ */
2
3 /*
4 * Copyright (c) 1983, 1993
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 /*
33 * Melbourne getty.
34 */
35 #include <sys/ioctl.h>
36 #include <stdlib.h>
37 #include <unistd.h>
38 #include <string.h>
39 #include <poll.h>
40 #include <termios.h>
41
42 #include "gettytab.h"
43 #include "pathnames.h"
44 #include "extern.h"
45
46 extern struct termios tmode, omode;
47
48 /*
49 * Get a table entry.
50 */
51 void
gettable(char * name,char * buf)52 gettable(char *name, char *buf)
53 {
54 struct gettystrs *sp;
55 struct gettynums *np;
56 struct gettyflags *fp;
57 long n;
58 char *dba[2];
59 dba[0] = _PATH_GETTYTAB;
60 dba[1] = NULL;
61
62 if (cgetent(&buf, dba, name) != 0)
63 return;
64
65 for (sp = gettystrs; sp->field; sp++)
66 cgetstr(buf, sp->field, &sp->value);
67 for (np = gettynums; np->field; np++) {
68 if (cgetnum(buf, np->field, &n) == -1)
69 np->set = 0;
70 else {
71 np->set = 1;
72 np->value = n;
73 }
74 }
75 for (fp = gettyflags; fp->field; fp++) {
76 if (cgetcap(buf, fp->field, ':') == NULL)
77 fp->set = 0;
78 else {
79 fp->set = 1;
80 fp->value = 1 ^ fp->invrt;
81 }
82 }
83 #ifdef DEBUG
84 printf("name=\"%s\", buf=\"%s\"\n", name, buf);
85 for (sp = gettystrs; sp->field; sp++)
86 printf("cgetstr: %s=%s\n", sp->field, sp->value);
87 for (np = gettynums; np->field; np++)
88 printf("cgetnum: %s=%d\n", np->field, np->value);
89 for (fp = gettyflags; fp->field; fp++)
90 printf("cgetflags: %s='%c' set='%c'\n", fp->field,
91 fp->value + '0', fp->set + '0');
92 exit(1);
93 #endif /* DEBUG */
94 }
95
96 void
gendefaults(void)97 gendefaults(void)
98 {
99 struct gettystrs *sp;
100 struct gettynums *np;
101 struct gettyflags *fp;
102
103 for (sp = gettystrs; sp->field; sp++)
104 if (sp->value)
105 sp->defalt = sp->value;
106 for (np = gettynums; np->field; np++)
107 if (np->set)
108 np->defalt = np->value;
109 for (fp = gettyflags; fp->field; fp++)
110 if (fp->set)
111 fp->defalt = fp->value;
112 else
113 fp->defalt = fp->invrt;
114 }
115
116 void
setdefaults(void)117 setdefaults(void)
118 {
119 struct gettystrs *sp;
120 struct gettynums *np;
121 struct gettyflags *fp;
122
123 for (sp = gettystrs; sp->field; sp++)
124 if (!sp->value)
125 sp->value = sp->defalt;
126 for (np = gettynums; np->field; np++)
127 if (!np->set)
128 np->value = np->defalt;
129 for (fp = gettyflags; fp->field; fp++)
130 if (!fp->set)
131 fp->value = fp->defalt;
132 }
133
134 static char **
135 charnames[] = {
136 &ER, &KL, &IN, &QU, &XN, &XF, &ET, &BK,
137 &SU, &DS, &RP, &FL, &WE, &LN, 0
138 };
139
140 static char *
141 charvars[] = {
142 &tmode.c_cc[VERASE], &tmode.c_cc[VKILL], &tmode.c_cc[VINTR],
143 &tmode.c_cc[VQUIT], &tmode.c_cc[VSTART], &tmode.c_cc[VSTOP],
144 &tmode.c_cc[VEOF], &tmode.c_cc[VEOL], &tmode.c_cc[VSUSP],
145 &tmode.c_cc[VDSUSP], &tmode.c_cc[VREPRINT], &tmode.c_cc[VDISCARD],
146 &tmode.c_cc[VWERASE], &tmode.c_cc[VLNEXT], 0
147 };
148
149 void
setchars(void)150 setchars(void)
151 {
152 int i;
153 char *p;
154
155 for (i = 0; charnames[i]; i++) {
156 p = *charnames[i];
157 if (p && *p)
158 *charvars[i] = *p;
159 else
160 *charvars[i] = _POSIX_VDISABLE;
161 }
162 }
163
164 /* Macros to clear/set/test flags. */
165 #define SET(t, f) (t) |= (f)
166 #define CLR(t, f) (t) &= ~(f)
167 #define ISSET(t, f) ((t) & (f))
168
169 void
setflags(int n)170 setflags(int n)
171 {
172 tcflag_t iflag, oflag, cflag, lflag;
173
174 switch (n) {
175 case 0:
176 if (C0set && I0set && L0set && O0set) {
177 tmode.c_cflag = C0;
178 tmode.c_iflag = I0;
179 tmode.c_lflag = L0;
180 tmode.c_oflag = O0;
181 return;
182 }
183 break;
184 case 1:
185 if (C1set && I1set && L1set && O1set) {
186 tmode.c_cflag = C1;
187 tmode.c_iflag = I1;
188 tmode.c_lflag = L1;
189 tmode.c_oflag = O1;
190 return;
191 }
192 break;
193 default:
194 if (C2set && I2set && L2set && O2set) {
195 tmode.c_cflag = C2;
196 tmode.c_iflag = I2;
197 tmode.c_lflag = L2;
198 tmode.c_oflag = O2;
199 return;
200 }
201 break;
202 }
203
204 iflag = omode.c_iflag;
205 oflag = omode.c_oflag;
206 cflag = omode.c_cflag;
207 lflag = omode.c_lflag;
208
209 if (NP) {
210 CLR(cflag, CSIZE|PARENB);
211 SET(cflag, CS8);
212 CLR(iflag, ISTRIP|INPCK|IGNPAR);
213 } else if (AP || EP || OP) {
214 CLR(cflag, CSIZE);
215 SET(cflag, CS7|PARENB);
216 SET(iflag, ISTRIP);
217 if (OP && !EP) {
218 SET(iflag, INPCK|IGNPAR);
219 SET(cflag, PARODD);
220 if (AP)
221 CLR(iflag, INPCK);
222 } else if (EP && !OP) {
223 SET(iflag, INPCK|IGNPAR);
224 CLR(cflag, PARODD);
225 if (AP)
226 CLR(iflag, INPCK);
227 } else if (AP || (EP && OP)) {
228 CLR(iflag, INPCK|IGNPAR);
229 CLR(cflag, PARODD);
230 }
231 } /* else, leave as is */
232
233 if (UC) {
234 SET(iflag, IUCLC);
235 SET(oflag, OLCUC);
236 SET(lflag, XCASE);
237 }
238
239 if (HC)
240 SET(cflag, HUPCL);
241 else
242 CLR(cflag, HUPCL);
243
244 if (MB)
245 SET(cflag, MDMBUF);
246 else
247 CLR(cflag, MDMBUF);
248
249 if (NL) {
250 SET(iflag, ICRNL);
251 SET(oflag, ONLCR|OPOST);
252 } else {
253 CLR(iflag, ICRNL);
254 CLR(oflag, ONLCR);
255 }
256
257 if (!HT)
258 SET(oflag, OXTABS|OPOST);
259 else
260 CLR(oflag, OXTABS);
261
262
263 if (n == 1) { /* read mode flags */
264 if (RW) {
265 iflag = 0;
266 CLR(oflag, OPOST);
267 CLR(cflag, CSIZE|PARENB);
268 SET(cflag, CS8);
269 lflag = 0;
270 } else {
271 CLR(lflag, ICANON);
272 }
273 goto out;
274 }
275
276 if (n == 0)
277 goto out;
278
279 #if 0
280 if (CB)
281 SET(f, CRTBS);
282 #endif
283
284 if (CE)
285 SET(lflag, ECHOE);
286 else
287 CLR(lflag, ECHOE);
288
289 if (CK)
290 SET(lflag, ECHOKE);
291 else
292 CLR(lflag, ECHOKE);
293
294 if (PE)
295 SET(lflag, ECHOPRT);
296 else
297 CLR(lflag, ECHOPRT);
298
299 if (EC)
300 SET(lflag, ECHO);
301 else
302 CLR(lflag, ECHO);
303
304 if (XC)
305 SET(lflag, ECHOCTL);
306 else
307 CLR(lflag, ECHOCTL);
308
309 if (DX)
310 CLR(lflag, IXANY);
311 else
312 SET(lflag, IXANY);
313
314 out:
315 tmode.c_iflag = iflag;
316 tmode.c_oflag = oflag;
317 tmode.c_cflag = cflag;
318 tmode.c_lflag = lflag;
319 }
320
321
322 void
makeenv(char * env[])323 makeenv(char *env[])
324 {
325 static char termbuf[128] = "TERM=";
326 char *p, *q;
327 char **ep;
328
329 ep = env;
330 if (TT && *TT) {
331 strlcat(termbuf, TT, sizeof(termbuf));
332 *ep++ = termbuf;
333 }
334 if ((p = EV)) {
335 q = p;
336 while ((q = strchr(q, ','))) {
337 *q++ = '\0';
338 *ep++ = p;
339 p = q;
340 }
341 if (*p)
342 *ep++ = p;
343 }
344 *ep = NULL;
345 }
346
347 /*
348 * This speed select mechanism is written for the Develcon DATASWITCH.
349 * The Develcon sends a string of the form "B{speed}\n" at a predefined
350 * baud rate. This string indicates the user's actual speed.
351 * The routine below returns the terminal type mapped from derived speed.
352 */
353 struct portselect {
354 char *ps_baud;
355 char *ps_type;
356 } portspeeds[] = {
357 { "B110", "std.110" },
358 { "B134", "std.134" },
359 { "B150", "std.150" },
360 { "B300", "std.300" },
361 { "B600", "std.600" },
362 { "B1200", "std.1200" },
363 { "B2400", "std.2400" },
364 { "B4800", "std.4800" },
365 { "B9600", "std.9600" },
366 { "B19200", "std.19200" },
367 { 0 }
368 };
369
370 char *
portselector(void)371 portselector(void)
372 {
373 char c, baud[20], *type = "default";
374 struct portselect *ps;
375 size_t len;
376
377 alarm(5*60);
378 for (len = 0; len < sizeof (baud) - 1; len++) {
379 if (read(STDIN_FILENO, &c, 1) <= 0)
380 break;
381 c &= 0177;
382 if (c == '\n' || c == '\r')
383 break;
384 if (c == 'B')
385 len = 0; /* in case of leading garbage */
386 baud[len] = c;
387 }
388 baud[len] = '\0';
389 for (ps = portspeeds; ps->ps_baud; ps++)
390 if (strcmp(ps->ps_baud, baud) == 0) {
391 type = ps->ps_type;
392 break;
393 }
394 sleep(2); /* wait for connection to complete */
395 return (type);
396 }
397
398 /*
399 * This auto-baud speed select mechanism is written for the Micom 600
400 * portselector. Selection is done by looking at how the character '\r'
401 * is garbled at the different speeds.
402 */
403 #include <sys/time.h>
404
405 char *
autobaud(void)406 autobaud(void)
407 {
408 struct pollfd pfd[1];
409 struct timespec ts;
410 char c, *type = "9600-baud";
411
412 (void)tcflush(0, TCIOFLUSH);
413 pfd[0].fd = 0;
414 pfd[0].events = POLLIN;
415 if (poll(pfd, 1, 5 * 1000) <= 0)
416 return (type);
417 if (read(STDIN_FILENO, &c, sizeof(char)) != sizeof(char))
418 return (type);
419
420 ts.tv_sec = 0;
421 ts.tv_nsec = 20 * 1000;
422 nanosleep(&ts, NULL);
423 (void)tcflush(0, TCIOFLUSH);
424 switch (c & 0377) {
425
426 case 0200: /* 300-baud */
427 type = "300-baud";
428 break;
429
430 case 0346: /* 1200-baud */
431 type = "1200-baud";
432 break;
433
434 case 015: /* 2400-baud */
435 case 0215:
436 type = "2400-baud";
437 break;
438
439 default: /* 4800-baud */
440 type = "4800-baud";
441 break;
442
443 case 0377: /* 9600-baud */
444 type = "9600-baud";
445 break;
446 }
447 return (type);
448 }
449