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