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) 64 { 65 char *buf = NULL; 66 struct gettystrs *sp; 67 struct gettynums *np; 68 struct gettyflags *fp; 69 long n; 70 int l; 71 char *p; 72 static char path_gettytab[PATH_MAX]; 73 char *dba[2]; 74 75 static int firsttime = 1; 76 77 strlcpy(path_gettytab, _PATH_GETTYTAB, sizeof(path_gettytab)); 78 dba[0] = path_gettytab; 79 dba[1] = NULL; 80 81 if (firsttime) { 82 /* 83 * we need to strdup() anything in the strings array 84 * initially in order to simplify things later 85 */ 86 for (sp = gettystrs; sp->field; sp++) 87 if (sp->value != NULL) { 88 /* handle these ones more carefully */ 89 if (sp >= &gettystrs[4] && sp <= &gettystrs[6]) 90 l = 2; 91 else 92 l = strlen(sp->value) + 1; 93 if ((p = malloc(l)) != NULL) 94 strlcpy(p, sp->value, l); 95 /* 96 * replace, even if NULL, else we'll 97 * have problems with free()ing static mem 98 */ 99 sp->value = p; 100 } 101 firsttime = 0; 102 } 103 104 switch (cgetent(&buf, dba, name)) { 105 case 1: 106 syslog(LOG_ERR, "getty: couldn't resolve 'tc=' in gettytab '%s'", name); 107 return; 108 case 0: 109 break; 110 case -1: 111 syslog(LOG_ERR, "getty: unknown gettytab entry '%s'", name); 112 return; 113 case -2: 114 syslog(LOG_ERR, "getty: retrieving gettytab entry '%s': %m", name); 115 return; 116 case -3: 117 syslog(LOG_ERR, "getty: recursive 'tc=' reference gettytab entry '%s'", name); 118 return; 119 default: 120 syslog(LOG_ERR, "getty: unexpected cgetent() error for entry '%s'", name); 121 return; 122 } 123 124 for (sp = gettystrs; sp->field; sp++) { 125 if ((l = cgetstr(buf, sp->field, &p)) >= 0) { 126 if (sp->value) { 127 /* prefer existing value */ 128 if (strcmp(p, sp->value) != 0) 129 free(sp->value); 130 else { 131 free(p); 132 p = sp->value; 133 } 134 } 135 sp->value = p; 136 } else if (l == -1) { 137 free(sp->value); 138 sp->value = NULL; 139 } 140 } 141 142 for (np = gettynums; np->field; np++) { 143 if (cgetnum(buf, np->field, &n) == -1) 144 np->set = 0; 145 else { 146 np->set = 1; 147 np->value = n; 148 } 149 } 150 151 for (fp = gettyflags; fp->field; fp++) { 152 if (cgetcap(buf, fp->field, ':') == NULL) 153 fp->set = 0; 154 else { 155 fp->set = 1; 156 fp->value = 1 ^ fp->invrt; 157 } 158 } 159 free(buf); 160 } 161 162 void 163 gendefaults(void) 164 { 165 struct gettystrs *sp; 166 struct gettynums *np; 167 struct gettyflags *fp; 168 169 for (sp = gettystrs; sp->field; sp++) 170 if (sp->value) 171 sp->defalt = strdup(sp->value); 172 for (np = gettynums; np->field; np++) 173 if (np->set) 174 np->defalt = np->value; 175 for (fp = gettyflags; fp->field; fp++) 176 if (fp->set) 177 fp->defalt = fp->value; 178 else 179 fp->defalt = fp->invrt; 180 } 181 182 void 183 setdefaults(void) 184 { 185 struct gettystrs *sp; 186 struct gettynums *np; 187 struct gettyflags *fp; 188 189 for (sp = gettystrs; sp->field; sp++) 190 if (!sp->value) 191 sp->value = !sp->defalt ? 192 sp->defalt : strdup(sp->defalt); 193 for (np = gettynums; np->field; np++) 194 if (!np->set) 195 np->value = np->defalt; 196 for (fp = gettyflags; fp->field; fp++) 197 if (!fp->set) 198 fp->value = fp->defalt; 199 } 200 201 static char ** 202 charnames[] = { 203 &ER, &KL, &IN, &QU, &XN, &XF, &ET, &BK, 204 &SU, &DS, &RP, &FL, &WE, &LN, 0 205 }; 206 207 #define CV(a) (char *)(&tmode.c_cc[a]) 208 209 static char * 210 charvars[] = { 211 CV(VERASE), CV(VKILL), CV(VINTR), 212 CV(VQUIT), CV(VSTART), CV(VSTOP), 213 CV(VEOF), CV(VEOL), CV(VSUSP), 214 CV(VDSUSP), CV(VREPRINT), CV(VDISCARD), 215 CV(VWERASE), CV(VLNEXT), 0 216 }; 217 218 void 219 setchars(void) 220 { 221 int i; 222 const char *p; 223 224 for (i = 0; charnames[i]; i++) { 225 p = *charnames[i]; 226 if (p && *p) 227 *charvars[i] = *p; 228 else 229 *charvars[i] = _POSIX_VDISABLE; 230 } 231 } 232 233 /* Macros to clear/set/test flags. */ 234 #define SET(t, f) (t) |= (f) 235 #define CLR(t, f) (t) &= ~(f) 236 #define ISSET(t, f) ((t) & (f)) 237 238 void 239 set_flags(int n) 240 { 241 tcflag_t iflag, oflag, cflag, lflag; 242 243 244 switch (n) { 245 case 0: 246 if (C0set && I0set && L0set && O0set) { 247 tmode.c_cflag = C0; 248 tmode.c_iflag = I0; 249 tmode.c_lflag = L0; 250 tmode.c_oflag = O0; 251 return; 252 } 253 break; 254 case 1: 255 if (C1set && I1set && L1set && O1set) { 256 tmode.c_cflag = C1; 257 tmode.c_iflag = I1; 258 tmode.c_lflag = L1; 259 tmode.c_oflag = O1; 260 return; 261 } 262 break; 263 default: 264 if (C2set && I2set && L2set && O2set) { 265 tmode.c_cflag = C2; 266 tmode.c_iflag = I2; 267 tmode.c_lflag = L2; 268 tmode.c_oflag = O2; 269 return; 270 } 271 break; 272 } 273 274 iflag = omode.c_iflag; 275 oflag = omode.c_oflag; 276 cflag = omode.c_cflag; 277 lflag = omode.c_lflag; 278 279 if (NP) { 280 CLR(cflag, CSIZE|PARENB); 281 SET(cflag, CS8); 282 CLR(iflag, ISTRIP|INPCK|IGNPAR); 283 } else if (AP || EP || OP) { 284 CLR(cflag, CSIZE); 285 SET(cflag, CS7|PARENB); 286 SET(iflag, ISTRIP); 287 if (OP && !EP) { 288 SET(iflag, INPCK|IGNPAR); 289 SET(cflag, PARODD); 290 if (AP) 291 CLR(iflag, INPCK); 292 } else if (EP && !OP) { 293 SET(iflag, INPCK|IGNPAR); 294 CLR(cflag, PARODD); 295 if (AP) 296 CLR(iflag, INPCK); 297 } else if (AP || (EP && OP)) { 298 CLR(iflag, INPCK|IGNPAR); 299 CLR(cflag, PARODD); 300 } 301 } /* else, leave as is */ 302 303 #if 0 304 if (UC) 305 f |= LCASE; 306 #endif 307 308 if (HC) 309 SET(cflag, HUPCL); 310 else 311 CLR(cflag, HUPCL); 312 313 if (MB) 314 SET(cflag, MDMBUF); 315 else 316 CLR(cflag, MDMBUF); 317 318 if (HW) 319 SET(cflag, CRTSCTS); 320 else 321 CLR(cflag, CRTSCTS); 322 323 if (NL) { 324 SET(iflag, ICRNL); 325 SET(oflag, ONLCR|OPOST); 326 } else { 327 CLR(iflag, ICRNL); 328 CLR(oflag, ONLCR); 329 } 330 331 if (!HT) 332 SET(oflag, OXTABS|OPOST); 333 else 334 CLR(oflag, OXTABS); 335 336 #ifdef XXX_DELAY 337 SET(f, delaybits()); 338 #endif 339 340 if (n == 1) { /* read mode flags */ 341 if (RW) { 342 iflag = 0; 343 CLR(oflag, OPOST); 344 CLR(cflag, CSIZE|PARENB); 345 SET(cflag, CS8); 346 lflag = 0; 347 } else { 348 CLR(lflag, ICANON); 349 } 350 goto out; 351 } 352 353 if (n == 0) 354 goto out; 355 356 #if 0 357 if (CB) 358 SET(f, CRTBS); 359 #endif 360 361 if (CE) 362 SET(lflag, ECHOE); 363 else 364 CLR(lflag, ECHOE); 365 366 if (CK) 367 SET(lflag, ECHOKE); 368 else 369 CLR(lflag, ECHOKE); 370 371 if (PE) 372 SET(lflag, ECHOPRT); 373 else 374 CLR(lflag, ECHOPRT); 375 376 if (EC) 377 SET(lflag, ECHO); 378 else 379 CLR(lflag, ECHO); 380 381 if (XC) 382 SET(lflag, ECHOCTL); 383 else 384 CLR(lflag, ECHOCTL); 385 386 if (DX) 387 SET(lflag, IXANY); 388 else 389 CLR(lflag, IXANY); 390 391 out: 392 tmode.c_iflag = iflag; 393 tmode.c_oflag = oflag; 394 tmode.c_cflag = cflag; 395 tmode.c_lflag = lflag; 396 } 397 398 399 #ifdef XXX_DELAY 400 struct delayval { 401 unsigned delay; /* delay in ms */ 402 int bits; 403 }; 404 405 /* 406 * below are random guesses, I can't be bothered checking 407 */ 408 409 struct delayval crdelay[] = { 410 { 1, CR1 }, 411 { 2, CR2 }, 412 { 3, CR3 }, 413 { 83, CR1 }, 414 { 166, CR2 }, 415 { 0, CR3 }, 416 }; 417 418 struct delayval nldelay[] = { 419 { 1, NL1 }, /* special, calculated */ 420 { 2, NL2 }, 421 { 3, NL3 }, 422 { 100, NL2 }, 423 { 0, NL3 }, 424 }; 425 426 struct delayval bsdelay[] = { 427 { 1, BS1 }, 428 { 0, 0 }, 429 }; 430 431 struct delayval ffdelay[] = { 432 { 1, FF1 }, 433 { 1750, FF1 }, 434 { 0, FF1 }, 435 }; 436 437 struct delayval tbdelay[] = { 438 { 1, TAB1 }, 439 { 2, TAB2 }, 440 { 3, XTABS }, /* this is expand tabs */ 441 { 100, TAB1 }, 442 { 0, TAB2 }, 443 }; 444 445 int 446 delaybits(void) 447 { 448 int f; 449 450 f = adelay(CD, crdelay); 451 f |= adelay(ND, nldelay); 452 f |= adelay(FD, ffdelay); 453 f |= adelay(TD, tbdelay); 454 f |= adelay(BD, bsdelay); 455 return (f); 456 } 457 458 int 459 adelay(int ms, struct delayval *dp) 460 { 461 if (ms == 0) 462 return (0); 463 while (dp->delay && ms > dp->delay) 464 dp++; 465 return (dp->bits); 466 } 467 #endif 468 469 char editedhost[MAXHOSTNAMELEN]; 470 471 void 472 edithost(const char *pattern) 473 { 474 regex_t regex; 475 regmatch_t *match; 476 int found; 477 478 if (pattern == NULL || *pattern == '\0') 479 goto copyasis; 480 if (regcomp(®ex, pattern, REG_EXTENDED) != 0) 481 goto copyasis; 482 483 match = calloc(regex.re_nsub + 1, sizeof(*match)); 484 if (match == NULL) { 485 regfree(®ex); 486 goto copyasis; 487 } 488 489 found = !regexec(®ex, HN, regex.re_nsub + 1, match, 0); 490 if (found) { 491 size_t subex, totalsize; 492 493 /* 494 * We found a match. If there were no parenthesized 495 * subexpressions in the pattern, use entire matched 496 * string as ``editedhost''; otherwise use the first 497 * matched subexpression. 498 */ 499 subex = !!regex.re_nsub; 500 totalsize = match[subex].rm_eo - match[subex].rm_so + 1; 501 strlcpy(editedhost, HN + match[subex].rm_so, totalsize > 502 sizeof(editedhost) ? sizeof(editedhost) : totalsize); 503 } 504 free(match); 505 regfree(®ex); 506 if (found) 507 return; 508 /* 509 * In case of any errors, or if the pattern did not match, pass 510 * the original hostname as is. 511 */ 512 copyasis: 513 strlcpy(editedhost, HN, sizeof(editedhost)); 514 } 515 516 static struct speedtab { 517 int speed; 518 int uxname; 519 } speedtab[] = { 520 { 50, B50 }, 521 { 75, B75 }, 522 { 110, B110 }, 523 { 134, B134 }, 524 { 150, B150 }, 525 { 200, B200 }, 526 { 300, B300 }, 527 { 600, B600 }, 528 { 1200, B1200 }, 529 { 1800, B1800 }, 530 { 2400, B2400 }, 531 { 4800, B4800 }, 532 { 9600, B9600 }, 533 { 19200, EXTA }, 534 { 19, EXTA }, /* for people who say 19.2K */ 535 { 38400, EXTB }, 536 { 38, EXTB }, 537 { 7200, EXTB }, /* alternative */ 538 { 57600, B57600 }, 539 { 115200, B115200 }, 540 { 230400, B230400 }, 541 { 0, 0 } 542 }; 543 544 int 545 speed(int val) 546 { 547 struct speedtab *sp; 548 549 if (val <= B230400) 550 return (val); 551 552 for (sp = speedtab; sp->speed; sp++) 553 if (sp->speed == val) 554 return (sp->uxname); 555 556 return (B300); /* default in impossible cases */ 557 } 558 559 void 560 makeenv(char *env[]) 561 { 562 static char termbuf[128] = "TERM="; 563 char *p, *q; 564 char **ep; 565 566 ep = env; 567 if (TT && *TT) { 568 strlcat(termbuf, TT, sizeof(termbuf)); 569 *ep++ = termbuf; 570 } 571 if ((p = EV)) { 572 q = p; 573 while ((q = strchr(q, ','))) { 574 *q++ = '\0'; 575 *ep++ = p; 576 p = q; 577 } 578 if (*p) 579 *ep++ = p; 580 } 581 *ep = (char *)0; 582 } 583 584 /* 585 * This speed select mechanism is written for the Develcon DATASWITCH. 586 * The Develcon sends a string of the form "B{speed}\n" at a predefined 587 * baud rate. This string indicates the user's actual speed. 588 * The routine below returns the terminal type mapped from derived speed. 589 */ 590 static struct portselect { 591 const char *ps_baud; 592 const char *ps_type; 593 } portspeeds[] = { 594 { "B110", "std.110" }, 595 { "B134", "std.134" }, 596 { "B150", "std.150" }, 597 { "B300", "std.300" }, 598 { "B600", "std.600" }, 599 { "B1200", "std.1200" }, 600 { "B2400", "std.2400" }, 601 { "B4800", "std.4800" }, 602 { "B9600", "std.9600" }, 603 { "B19200", "std.19200" }, 604 { NULL, NULL } 605 }; 606 607 const char * 608 portselector(void) 609 { 610 char c, baud[20]; 611 const char *type = "default"; 612 struct portselect *ps; 613 size_t len; 614 615 alarm(5*60); 616 for (len = 0; len < sizeof (baud) - 1; len++) { 617 if (read(STDIN_FILENO, &c, 1) <= 0) 618 break; 619 c &= 0177; 620 if (c == '\n' || c == '\r') 621 break; 622 if (c == 'B') 623 len = 0; /* in case of leading garbage */ 624 baud[len] = c; 625 } 626 baud[len] = '\0'; 627 for (ps = portspeeds; ps->ps_baud; ps++) 628 if (strcmp(ps->ps_baud, baud) == 0) { 629 type = ps->ps_type; 630 break; 631 } 632 sleep(2); /* wait for connection to complete */ 633 return (type); 634 } 635 636 /* 637 * This auto-baud speed select mechanism is written for the Micom 600 638 * portselector. Selection is done by looking at how the character '\r' 639 * is garbled at the different speeds. 640 */ 641 const char * 642 autobaud(void) 643 { 644 struct pollfd set[1]; 645 struct timespec timeout; 646 char c; 647 const char *type = "9600-baud"; 648 649 (void)tcflush(0, TCIOFLUSH); 650 set[0].fd = STDIN_FILENO; 651 set[0].events = POLLIN; 652 if (poll(set, 1, 5000) <= 0) 653 return (type); 654 if (read(STDIN_FILENO, &c, sizeof(char)) != sizeof(char)) 655 return (type); 656 timeout.tv_sec = 0; 657 timeout.tv_nsec = 20000; 658 (void)nanosleep(&timeout, NULL); 659 (void)tcflush(0, TCIOFLUSH); 660 switch (c & 0377) { 661 662 case 0200: /* 300-baud */ 663 type = "300-baud"; 664 break; 665 666 case 0346: /* 1200-baud */ 667 type = "1200-baud"; 668 break; 669 670 case 015: /* 2400-baud */ 671 case 0215: 672 type = "2400-baud"; 673 break; 674 675 default: /* 4800-baud */ 676 type = "4800-baud"; 677 break; 678 679 case 0377: /* 9600-baud */ 680 type = "9600-baud"; 681 break; 682 } 683 return (type); 684 } 685