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