1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 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 #ifndef lint 33 #if 0 34 static char sccsid[] = "@(#)from: subr.c 8.1 (Berkeley) 6/4/93"; 35 #endif 36 static const char rcsid[] = 37 "$FreeBSD$"; 38 #endif /* not lint */ 39 40 /* 41 * Melbourne getty. 42 */ 43 #include <sys/ioctl.h> 44 #include <sys/param.h> 45 #include <sys/time.h> 46 47 #include <poll.h> 48 #include <regex.h> 49 #include <stdlib.h> 50 #include <string.h> 51 #include <syslog.h> 52 #include <termios.h> 53 #include <unistd.h> 54 55 #include "gettytab.h" 56 #include "pathnames.h" 57 #include "extern.h" 58 59 /* 60 * Get a table entry. 61 */ 62 void 63 gettable(const char *name, char *buf) 64 { 65 struct gettystrs *sp; 66 struct gettynums *np; 67 struct gettyflags *fp; 68 long n; 69 int l; 70 char *p; 71 static char path_gettytab[PATH_MAX]; 72 char *dba[2]; 73 74 static int firsttime = 1; 75 76 strlcpy(path_gettytab, _PATH_GETTYTAB, sizeof(path_gettytab)); 77 dba[0] = path_gettytab; 78 dba[1] = NULL; 79 80 if (firsttime) { 81 /* 82 * we need to strdup() anything in the strings array 83 * initially in order to simplify things later 84 */ 85 for (sp = gettystrs; sp->field; sp++) 86 if (sp->value != NULL) { 87 /* handle these ones more carefully */ 88 if (sp >= &gettystrs[4] && sp <= &gettystrs[6]) 89 l = 2; 90 else 91 l = strlen(sp->value) + 1; 92 if ((p = malloc(l)) != NULL) 93 strlcpy(p, sp->value, l); 94 /* 95 * replace, even if NULL, else we'll 96 * have problems with free()ing static mem 97 */ 98 sp->value = p; 99 } 100 firsttime = 0; 101 } 102 103 switch (cgetent(&buf, dba, name)) { 104 case 1: 105 syslog(LOG_ERR, "getty: couldn't resolve 'tc=' in gettytab '%s'", name); 106 return; 107 case 0: 108 break; 109 case -1: 110 syslog(LOG_ERR, "getty: unknown gettytab entry '%s'", name); 111 return; 112 case -2: 113 syslog(LOG_ERR, "getty: retrieving gettytab entry '%s': %m", name); 114 return; 115 case -3: 116 syslog(LOG_ERR, "getty: recursive 'tc=' reference gettytab entry '%s'", name); 117 return; 118 default: 119 syslog(LOG_ERR, "getty: unexpected cgetent() error for entry '%s'", name); 120 return; 121 } 122 123 for (sp = gettystrs; sp->field; sp++) { 124 if ((l = cgetstr(buf, sp->field, &p)) >= 0) { 125 if (sp->value) { 126 /* prefer existing value */ 127 if (strcmp(p, sp->value) != 0) 128 free(sp->value); 129 else { 130 free(p); 131 p = sp->value; 132 } 133 } 134 sp->value = p; 135 } else if (l == -1) { 136 free(sp->value); 137 sp->value = NULL; 138 } 139 } 140 141 for (np = gettynums; np->field; np++) { 142 if (cgetnum(buf, np->field, &n) == -1) 143 np->set = 0; 144 else { 145 np->set = 1; 146 np->value = n; 147 } 148 } 149 150 for (fp = gettyflags; fp->field; fp++) { 151 if (cgetcap(buf, fp->field, ':') == NULL) 152 fp->set = 0; 153 else { 154 fp->set = 1; 155 fp->value = 1 ^ fp->invrt; 156 } 157 } 158 } 159 160 void 161 gendefaults(void) 162 { 163 struct gettystrs *sp; 164 struct gettynums *np; 165 struct gettyflags *fp; 166 167 for (sp = gettystrs; sp->field; sp++) 168 if (sp->value) 169 sp->defalt = strdup(sp->value); 170 for (np = gettynums; np->field; np++) 171 if (np->set) 172 np->defalt = np->value; 173 for (fp = gettyflags; fp->field; fp++) 174 if (fp->set) 175 fp->defalt = fp->value; 176 else 177 fp->defalt = fp->invrt; 178 } 179 180 void 181 setdefaults(void) 182 { 183 struct gettystrs *sp; 184 struct gettynums *np; 185 struct gettyflags *fp; 186 187 for (sp = gettystrs; sp->field; sp++) 188 if (!sp->value) 189 sp->value = !sp->defalt ? sp->defalt 190 : strdup(sp->defalt); 191 for (np = gettynums; np->field; np++) 192 if (!np->set) 193 np->value = np->defalt; 194 for (fp = gettyflags; fp->field; fp++) 195 if (!fp->set) 196 fp->value = fp->defalt; 197 } 198 199 static char ** 200 charnames[] = { 201 &ER, &KL, &IN, &QU, &XN, &XF, &ET, &BK, 202 &SU, &DS, &RP, &FL, &WE, &LN, 0 203 }; 204 205 static char * 206 charvars[] = { 207 &tmode.c_cc[VERASE], &tmode.c_cc[VKILL], &tmode.c_cc[VINTR], 208 &tmode.c_cc[VQUIT], &tmode.c_cc[VSTART], &tmode.c_cc[VSTOP], 209 &tmode.c_cc[VEOF], &tmode.c_cc[VEOL], &tmode.c_cc[VSUSP], 210 &tmode.c_cc[VDSUSP], &tmode.c_cc[VREPRINT], &tmode.c_cc[VDISCARD], 211 &tmode.c_cc[VWERASE], &tmode.c_cc[VLNEXT], 0 212 }; 213 214 void 215 setchars(void) 216 { 217 int i; 218 const char *p; 219 220 for (i = 0; charnames[i]; i++) { 221 p = *charnames[i]; 222 if (p && *p) 223 *charvars[i] = *p; 224 else 225 *charvars[i] = _POSIX_VDISABLE; 226 } 227 } 228 229 /* Macros to clear/set/test flags. */ 230 #define SET(t, f) (t) |= (f) 231 #define CLR(t, f) (t) &= ~(f) 232 #define ISSET(t, f) ((t) & (f)) 233 234 void 235 set_flags(int n) 236 { 237 tcflag_t iflag, oflag, cflag, lflag; 238 239 240 switch (n) { 241 case 0: 242 if (C0set && I0set && L0set && O0set) { 243 tmode.c_cflag = C0; 244 tmode.c_iflag = I0; 245 tmode.c_lflag = L0; 246 tmode.c_oflag = O0; 247 return; 248 } 249 break; 250 case 1: 251 if (C1set && I1set && L1set && O1set) { 252 tmode.c_cflag = C1; 253 tmode.c_iflag = I1; 254 tmode.c_lflag = L1; 255 tmode.c_oflag = O1; 256 return; 257 } 258 break; 259 default: 260 if (C2set && I2set && L2set && O2set) { 261 tmode.c_cflag = C2; 262 tmode.c_iflag = I2; 263 tmode.c_lflag = L2; 264 tmode.c_oflag = O2; 265 return; 266 } 267 break; 268 } 269 270 iflag = omode.c_iflag; 271 oflag = omode.c_oflag; 272 cflag = omode.c_cflag; 273 lflag = omode.c_lflag; 274 275 if (NP) { 276 CLR(cflag, CSIZE|PARENB); 277 SET(cflag, CS8); 278 CLR(iflag, ISTRIP|INPCK|IGNPAR); 279 } else if (AP || EP || OP) { 280 CLR(cflag, CSIZE); 281 SET(cflag, CS7|PARENB); 282 SET(iflag, ISTRIP); 283 if (OP && !EP) { 284 SET(iflag, INPCK|IGNPAR); 285 SET(cflag, PARODD); 286 if (AP) 287 CLR(iflag, INPCK); 288 } else if (EP && !OP) { 289 SET(iflag, INPCK|IGNPAR); 290 CLR(cflag, PARODD); 291 if (AP) 292 CLR(iflag, INPCK); 293 } else if (AP || (EP && OP)) { 294 CLR(iflag, INPCK|IGNPAR); 295 CLR(cflag, PARODD); 296 } 297 } /* else, leave as is */ 298 299 #if 0 300 if (UC) 301 f |= LCASE; 302 #endif 303 304 if (HC) 305 SET(cflag, HUPCL); 306 else 307 CLR(cflag, HUPCL); 308 309 if (MB) 310 SET(cflag, MDMBUF); 311 else 312 CLR(cflag, MDMBUF); 313 314 if (HW) 315 SET(cflag, CRTSCTS); 316 else 317 CLR(cflag, CRTSCTS); 318 319 if (NL) { 320 SET(iflag, ICRNL); 321 SET(oflag, ONLCR|OPOST); 322 } else { 323 CLR(iflag, ICRNL); 324 CLR(oflag, ONLCR); 325 } 326 327 if (!HT) 328 SET(oflag, OXTABS|OPOST); 329 else 330 CLR(oflag, OXTABS); 331 332 #ifdef XXX_DELAY 333 SET(f, delaybits()); 334 #endif 335 336 if (n == 1) { /* read mode flags */ 337 if (RW) { 338 iflag = 0; 339 CLR(oflag, OPOST); 340 CLR(cflag, CSIZE|PARENB); 341 SET(cflag, CS8); 342 lflag = 0; 343 } else { 344 CLR(lflag, ICANON); 345 } 346 goto out; 347 } 348 349 if (n == 0) 350 goto out; 351 352 #if 0 353 if (CB) 354 SET(f, CRTBS); 355 #endif 356 357 if (CE) 358 SET(lflag, ECHOE); 359 else 360 CLR(lflag, ECHOE); 361 362 if (CK) 363 SET(lflag, ECHOKE); 364 else 365 CLR(lflag, ECHOKE); 366 367 if (PE) 368 SET(lflag, ECHOPRT); 369 else 370 CLR(lflag, ECHOPRT); 371 372 if (EC) 373 SET(lflag, ECHO); 374 else 375 CLR(lflag, ECHO); 376 377 if (XC) 378 SET(lflag, ECHOCTL); 379 else 380 CLR(lflag, ECHOCTL); 381 382 if (DX) 383 SET(lflag, IXANY); 384 else 385 CLR(lflag, IXANY); 386 387 out: 388 tmode.c_iflag = iflag; 389 tmode.c_oflag = oflag; 390 tmode.c_cflag = cflag; 391 tmode.c_lflag = lflag; 392 } 393 394 395 #ifdef XXX_DELAY 396 struct delayval { 397 unsigned delay; /* delay in ms */ 398 int bits; 399 }; 400 401 /* 402 * below are random guesses, I can't be bothered checking 403 */ 404 405 struct delayval crdelay[] = { 406 { 1, CR1 }, 407 { 2, CR2 }, 408 { 3, CR3 }, 409 { 83, CR1 }, 410 { 166, CR2 }, 411 { 0, CR3 }, 412 }; 413 414 struct delayval nldelay[] = { 415 { 1, NL1 }, /* special, calculated */ 416 { 2, NL2 }, 417 { 3, NL3 }, 418 { 100, NL2 }, 419 { 0, NL3 }, 420 }; 421 422 struct delayval bsdelay[] = { 423 { 1, BS1 }, 424 { 0, 0 }, 425 }; 426 427 struct delayval ffdelay[] = { 428 { 1, FF1 }, 429 { 1750, FF1 }, 430 { 0, FF1 }, 431 }; 432 433 struct delayval tbdelay[] = { 434 { 1, TAB1 }, 435 { 2, TAB2 }, 436 { 3, XTABS }, /* this is expand tabs */ 437 { 100, TAB1 }, 438 { 0, TAB2 }, 439 }; 440 441 int 442 delaybits(void) 443 { 444 int f; 445 446 f = adelay(CD, crdelay); 447 f |= adelay(ND, nldelay); 448 f |= adelay(FD, ffdelay); 449 f |= adelay(TD, tbdelay); 450 f |= adelay(BD, bsdelay); 451 return (f); 452 } 453 454 int 455 adelay(int ms, struct delayval *dp) 456 { 457 if (ms == 0) 458 return (0); 459 while (dp->delay && ms > dp->delay) 460 dp++; 461 return (dp->bits); 462 } 463 #endif 464 465 char editedhost[MAXHOSTNAMELEN]; 466 467 void 468 edithost(const char *pattern) 469 { 470 regex_t regex; 471 regmatch_t *match; 472 int found; 473 474 if (pattern == NULL || *pattern == '\0') 475 goto copyasis; 476 if (regcomp(®ex, pattern, REG_EXTENDED) != 0) 477 goto copyasis; 478 479 match = calloc(regex.re_nsub + 1, sizeof(*match)); 480 if (match == NULL) { 481 regfree(®ex); 482 goto copyasis; 483 } 484 485 found = !regexec(®ex, HN, regex.re_nsub + 1, match, 0); 486 if (found) { 487 size_t subex, totalsize; 488 489 /* 490 * We found a match. If there were no parenthesized 491 * subexpressions in the pattern, use entire matched 492 * string as ``editedhost''; otherwise use the first 493 * matched subexpression. 494 */ 495 subex = !!regex.re_nsub; 496 totalsize = match[subex].rm_eo - match[subex].rm_so + 1; 497 strlcpy(editedhost, HN + match[subex].rm_so, totalsize > 498 sizeof(editedhost) ? sizeof(editedhost) : totalsize); 499 } 500 free(match); 501 regfree(®ex); 502 if (found) 503 return; 504 /* 505 * In case of any errors, or if the pattern did not match, pass 506 * the original hostname as is. 507 */ 508 copyasis: 509 strlcpy(editedhost, HN, sizeof(editedhost)); 510 } 511 512 static struct speedtab { 513 int speed; 514 int uxname; 515 } speedtab[] = { 516 { 50, B50 }, 517 { 75, B75 }, 518 { 110, B110 }, 519 { 134, B134 }, 520 { 150, B150 }, 521 { 200, B200 }, 522 { 300, B300 }, 523 { 600, B600 }, 524 { 1200, B1200 }, 525 { 1800, B1800 }, 526 { 2400, B2400 }, 527 { 4800, B4800 }, 528 { 9600, B9600 }, 529 { 19200, EXTA }, 530 { 19, EXTA }, /* for people who say 19.2K */ 531 { 38400, EXTB }, 532 { 38, EXTB }, 533 { 7200, EXTB }, /* alternative */ 534 { 57600, B57600 }, 535 { 115200, B115200 }, 536 { 230400, B230400 }, 537 { 0, 0 } 538 }; 539 540 int 541 speed(int val) 542 { 543 struct speedtab *sp; 544 545 if (val <= B230400) 546 return (val); 547 548 for (sp = speedtab; sp->speed; sp++) 549 if (sp->speed == val) 550 return (sp->uxname); 551 552 return (B300); /* default in impossible cases */ 553 } 554 555 void 556 makeenv(char *env[]) 557 { 558 static char termbuf[128] = "TERM="; 559 char *p, *q; 560 char **ep; 561 562 ep = env; 563 if (TT && *TT) { 564 strlcat(termbuf, TT, sizeof(termbuf)); 565 *ep++ = termbuf; 566 } 567 if ((p = EV)) { 568 q = p; 569 while ((q = strchr(q, ','))) { 570 *q++ = '\0'; 571 *ep++ = p; 572 p = q; 573 } 574 if (*p) 575 *ep++ = p; 576 } 577 *ep = (char *)0; 578 } 579 580 /* 581 * This speed select mechanism is written for the Develcon DATASWITCH. 582 * The Develcon sends a string of the form "B{speed}\n" at a predefined 583 * baud rate. This string indicates the user's actual speed. 584 * The routine below returns the terminal type mapped from derived speed. 585 */ 586 static struct portselect { 587 const char *ps_baud; 588 const char *ps_type; 589 } portspeeds[] = { 590 { "B110", "std.110" }, 591 { "B134", "std.134" }, 592 { "B150", "std.150" }, 593 { "B300", "std.300" }, 594 { "B600", "std.600" }, 595 { "B1200", "std.1200" }, 596 { "B2400", "std.2400" }, 597 { "B4800", "std.4800" }, 598 { "B9600", "std.9600" }, 599 { "B19200", "std.19200" }, 600 { NULL, NULL } 601 }; 602 603 const char * 604 portselector(void) 605 { 606 char c, baud[20]; 607 const char *type = "default"; 608 struct portselect *ps; 609 size_t len; 610 611 alarm(5*60); 612 for (len = 0; len < sizeof (baud) - 1; len++) { 613 if (read(STDIN_FILENO, &c, 1) <= 0) 614 break; 615 c &= 0177; 616 if (c == '\n' || c == '\r') 617 break; 618 if (c == 'B') 619 len = 0; /* in case of leading garbage */ 620 baud[len] = c; 621 } 622 baud[len] = '\0'; 623 for (ps = portspeeds; ps->ps_baud; ps++) 624 if (strcmp(ps->ps_baud, baud) == 0) { 625 type = ps->ps_type; 626 break; 627 } 628 sleep(2); /* wait for connection to complete */ 629 return (type); 630 } 631 632 /* 633 * This auto-baud speed select mechanism is written for the Micom 600 634 * portselector. Selection is done by looking at how the character '\r' 635 * is garbled at the different speeds. 636 */ 637 const char * 638 autobaud(void) 639 { 640 struct pollfd set[1]; 641 struct timespec timeout; 642 char c; 643 const char *type = "9600-baud"; 644 645 (void)tcflush(0, TCIOFLUSH); 646 set[0].fd = STDIN_FILENO; 647 set[0].events = POLLIN; 648 if (poll(set, 1, 5000) <= 0) 649 return (type); 650 if (read(STDIN_FILENO, &c, sizeof(char)) != sizeof(char)) 651 return (type); 652 timeout.tv_sec = 0; 653 timeout.tv_nsec = 20000; 654 (void)nanosleep(&timeout, NULL); 655 (void)tcflush(0, TCIOFLUSH); 656 switch (c & 0377) { 657 658 case 0200: /* 300-baud */ 659 type = "300-baud"; 660 break; 661 662 case 0346: /* 1200-baud */ 663 type = "1200-baud"; 664 break; 665 666 case 015: /* 2400-baud */ 667 case 0215: 668 type = "2400-baud"; 669 break; 670 671 default: /* 4800-baud */ 672 type = "4800-baud"; 673 break; 674 675 case 0377: /* 9600-baud */ 676 type = "9600-baud"; 677 break; 678 } 679 return (type); 680 } 681