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