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 char *msg = NULL; 72 const char *dba[2]; 73 74 static int firsttime = 1; 75 76 dba[0] = _PATH_GETTYTAB; 77 dba[1] = NULL; 78 79 if (firsttime) { 80 /* 81 * we need to strdup() anything in the strings array 82 * initially in order to simplify things later 83 */ 84 for (sp = gettystrs; sp->field; sp++) 85 if (sp->value != NULL) { 86 /* handle these ones more carefully */ 87 if (sp >= &gettystrs[4] && sp <= &gettystrs[6]) 88 l = 2; 89 else 90 l = strlen(sp->value) + 1; 91 if ((p = malloc(l)) != NULL) { 92 strncpy(p, sp->value, l); 93 p[l-1] = '\0'; 94 } 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, (char **)dba, name)) { 105 case 1: 106 msg = "%s: couldn't resolve 'tc=' in gettytab '%s'"; 107 case 0: 108 break; 109 case -1: 110 msg = "%s: unknown gettytab entry '%s'"; 111 break; 112 case -2: 113 msg = "%s: retrieving gettytab entry '%s': %m"; 114 break; 115 case -3: 116 msg = "%s: recursive 'tc=' reference gettytab entry '%s'"; 117 break; 118 default: 119 msg = "%s: unexpected cgetent() error for entry '%s'"; 120 break; 121 } 122 123 if (msg != NULL) { 124 syslog(LOG_ERR, msg, "getty", name); 125 return; 126 } 127 128 for (sp = gettystrs; sp->field; sp++) { 129 if ((l = cgetstr(buf, sp->field, &p)) >= 0) { 130 if (sp->value) { 131 /* prefer existing value */ 132 if (strcmp(p, sp->value) != 0) 133 free(sp->value); 134 else { 135 free(p); 136 p = sp->value; 137 } 138 } 139 sp->value = p; 140 } else if (l == -1) { 141 free(sp->value); 142 sp->value = NULL; 143 } 144 } 145 146 for (np = gettynums; np->field; np++) { 147 if (cgetnum(buf, np->field, &n) == -1) 148 np->set = 0; 149 else { 150 np->set = 1; 151 np->value = n; 152 } 153 } 154 155 for (fp = gettyflags; fp->field; fp++) { 156 if (cgetcap(buf, fp->field, ':') == NULL) 157 fp->set = 0; 158 else { 159 fp->set = 1; 160 fp->value = 1 ^ fp->invrt; 161 } 162 } 163 } 164 165 void 166 gendefaults(void) 167 { 168 struct gettystrs *sp; 169 struct gettynums *np; 170 struct gettyflags *fp; 171 172 for (sp = gettystrs; sp->field; sp++) 173 if (sp->value) 174 sp->defalt = strdup(sp->value); 175 for (np = gettynums; np->field; np++) 176 if (np->set) 177 np->defalt = np->value; 178 for (fp = gettyflags; fp->field; fp++) 179 if (fp->set) 180 fp->defalt = fp->value; 181 else 182 fp->defalt = fp->invrt; 183 } 184 185 void 186 setdefaults(void) 187 { 188 struct gettystrs *sp; 189 struct gettynums *np; 190 struct gettyflags *fp; 191 192 for (sp = gettystrs; sp->field; sp++) 193 if (!sp->value) 194 sp->value = !sp->defalt ? sp->defalt 195 : strdup(sp->defalt); 196 for (np = gettynums; np->field; np++) 197 if (!np->set) 198 np->value = np->defalt; 199 for (fp = gettyflags; fp->field; fp++) 200 if (!fp->set) 201 fp->value = fp->defalt; 202 } 203 204 static char ** 205 charnames[] = { 206 &ER, &KL, &IN, &QU, &XN, &XF, &ET, &BK, 207 &SU, &DS, &RP, &FL, &WE, &LN, 0 208 }; 209 210 static char * 211 charvars[] = { 212 &tmode.c_cc[VERASE], &tmode.c_cc[VKILL], &tmode.c_cc[VINTR], 213 &tmode.c_cc[VQUIT], &tmode.c_cc[VSTART], &tmode.c_cc[VSTOP], 214 &tmode.c_cc[VEOF], &tmode.c_cc[VEOL], &tmode.c_cc[VSUSP], 215 &tmode.c_cc[VDSUSP], &tmode.c_cc[VREPRINT], &tmode.c_cc[VDISCARD], 216 &tmode.c_cc[VWERASE], &tmode.c_cc[VLNEXT], 0 217 }; 218 219 void 220 setchars(void) 221 { 222 int i; 223 const char *p; 224 225 for (i = 0; charnames[i]; i++) { 226 p = *charnames[i]; 227 if (p && *p) 228 *charvars[i] = *p; 229 else 230 *charvars[i] = _POSIX_VDISABLE; 231 } 232 } 233 234 /* Macros to clear/set/test flags. */ 235 #define SET(t, f) (t) |= (f) 236 #define CLR(t, f) (t) &= ~(f) 237 #define ISSET(t, f) ((t) & (f)) 238 239 void 240 set_flags(int n) 241 { 242 tcflag_t iflag, oflag, cflag, lflag; 243 244 245 switch (n) { 246 case 0: 247 if (C0set && I0set && L0set && O0set) { 248 tmode.c_cflag = C0; 249 tmode.c_iflag = I0; 250 tmode.c_lflag = L0; 251 tmode.c_oflag = O0; 252 return; 253 } 254 break; 255 case 1: 256 if (C1set && I1set && L1set && O1set) { 257 tmode.c_cflag = C1; 258 tmode.c_iflag = I1; 259 tmode.c_lflag = L1; 260 tmode.c_oflag = O1; 261 return; 262 } 263 break; 264 default: 265 if (C2set && I2set && L2set && O2set) { 266 tmode.c_cflag = C2; 267 tmode.c_iflag = I2; 268 tmode.c_lflag = L2; 269 tmode.c_oflag = O2; 270 return; 271 } 272 break; 273 } 274 275 iflag = omode.c_iflag; 276 oflag = omode.c_oflag; 277 cflag = omode.c_cflag; 278 lflag = omode.c_lflag; 279 280 if (NP) { 281 CLR(cflag, CSIZE|PARENB); 282 SET(cflag, CS8); 283 CLR(iflag, ISTRIP|INPCK|IGNPAR); 284 } else if (AP || EP || OP) { 285 CLR(cflag, CSIZE); 286 SET(cflag, CS7|PARENB); 287 SET(iflag, ISTRIP); 288 if (OP && !EP) { 289 SET(iflag, INPCK|IGNPAR); 290 SET(cflag, PARODD); 291 if (AP) 292 CLR(iflag, INPCK); 293 } else if (EP && !OP) { 294 SET(iflag, INPCK|IGNPAR); 295 CLR(cflag, PARODD); 296 if (AP) 297 CLR(iflag, INPCK); 298 } else if (AP || (EP && OP)) { 299 CLR(iflag, INPCK|IGNPAR); 300 CLR(cflag, PARODD); 301 } 302 } /* else, leave as is */ 303 304 #if 0 305 if (UC) 306 f |= LCASE; 307 #endif 308 309 if (HC) 310 SET(cflag, HUPCL); 311 else 312 CLR(cflag, HUPCL); 313 314 if (MB) 315 SET(cflag, MDMBUF); 316 else 317 CLR(cflag, MDMBUF); 318 319 if (HW) 320 SET(cflag, CRTSCTS); 321 else 322 CLR(cflag, CRTSCTS); 323 324 if (NL) { 325 SET(iflag, ICRNL); 326 SET(oflag, ONLCR|OPOST); 327 } else { 328 CLR(iflag, ICRNL); 329 CLR(oflag, ONLCR); 330 } 331 332 if (!HT) 333 SET(oflag, OXTABS|OPOST); 334 else 335 CLR(oflag, OXTABS); 336 337 #ifdef XXX_DELAY 338 SET(f, delaybits()); 339 #endif 340 341 if (n == 1) { /* read mode flags */ 342 if (RW) { 343 iflag = 0; 344 CLR(oflag, OPOST); 345 CLR(cflag, CSIZE|PARENB); 346 SET(cflag, CS8); 347 lflag = 0; 348 } else { 349 CLR(lflag, ICANON); 350 } 351 goto out; 352 } 353 354 if (n == 0) 355 goto out; 356 357 #if 0 358 if (CB) 359 SET(f, CRTBS); 360 #endif 361 362 if (CE) 363 SET(lflag, ECHOE); 364 else 365 CLR(lflag, ECHOE); 366 367 if (CK) 368 SET(lflag, ECHOKE); 369 else 370 CLR(lflag, ECHOKE); 371 372 if (PE) 373 SET(lflag, ECHOPRT); 374 else 375 CLR(lflag, ECHOPRT); 376 377 if (EC) 378 SET(lflag, ECHO); 379 else 380 CLR(lflag, ECHO); 381 382 if (XC) 383 SET(lflag, ECHOCTL); 384 else 385 CLR(lflag, ECHOCTL); 386 387 if (DX) 388 SET(lflag, IXANY); 389 else 390 CLR(lflag, IXANY); 391 392 out: 393 tmode.c_iflag = iflag; 394 tmode.c_oflag = oflag; 395 tmode.c_cflag = cflag; 396 tmode.c_lflag = lflag; 397 } 398 399 400 #ifdef XXX_DELAY 401 struct delayval { 402 unsigned delay; /* delay in ms */ 403 int bits; 404 }; 405 406 /* 407 * below are random guesses, I can't be bothered checking 408 */ 409 410 struct delayval crdelay[] = { 411 { 1, CR1 }, 412 { 2, CR2 }, 413 { 3, CR3 }, 414 { 83, CR1 }, 415 { 166, CR2 }, 416 { 0, CR3 }, 417 }; 418 419 struct delayval nldelay[] = { 420 { 1, NL1 }, /* special, calculated */ 421 { 2, NL2 }, 422 { 3, NL3 }, 423 { 100, NL2 }, 424 { 0, NL3 }, 425 }; 426 427 struct delayval bsdelay[] = { 428 { 1, BS1 }, 429 { 0, 0 }, 430 }; 431 432 struct delayval ffdelay[] = { 433 { 1, FF1 }, 434 { 1750, FF1 }, 435 { 0, FF1 }, 436 }; 437 438 struct delayval tbdelay[] = { 439 { 1, TAB1 }, 440 { 2, TAB2 }, 441 { 3, XTABS }, /* this is expand tabs */ 442 { 100, TAB1 }, 443 { 0, TAB2 }, 444 }; 445 446 int 447 delaybits(void) 448 { 449 int f; 450 451 f = adelay(CD, crdelay); 452 f |= adelay(ND, nldelay); 453 f |= adelay(FD, ffdelay); 454 f |= adelay(TD, tbdelay); 455 f |= adelay(BD, bsdelay); 456 return (f); 457 } 458 459 int 460 adelay(int ms, struct delayval *dp) 461 { 462 if (ms == 0) 463 return (0); 464 while (dp->delay && ms > dp->delay) 465 dp++; 466 return (dp->bits); 467 } 468 #endif 469 470 char editedhost[MAXHOSTNAMELEN]; 471 472 void 473 edithost(const char *pattern) 474 { 475 regex_t regex; 476 regmatch_t *match; 477 int found; 478 479 if (pattern == NULL || *pattern == '\0') 480 goto copyasis; 481 if (regcomp(®ex, pattern, REG_EXTENDED) != 0) 482 goto copyasis; 483 484 match = calloc(regex.re_nsub + 1, sizeof(*match)); 485 if (match == NULL) { 486 regfree(®ex); 487 goto copyasis; 488 } 489 490 found = !regexec(®ex, HN, regex.re_nsub + 1, match, 0); 491 if (found) { 492 size_t subex, totalsize; 493 494 /* 495 * We found a match. If there were no parenthesized 496 * subexpressions in the pattern, use entire matched 497 * string as ``editedhost''; otherwise use the first 498 * matched subexpression. 499 */ 500 subex = !!regex.re_nsub; 501 totalsize = match[subex].rm_eo - match[subex].rm_so + 1; 502 strlcpy(editedhost, HN + match[subex].rm_so, totalsize > 503 sizeof(editedhost) ? sizeof(editedhost) : totalsize); 504 } 505 free(match); 506 regfree(®ex); 507 if (found) 508 return; 509 /* 510 * In case of any errors, or if the pattern did not match, pass 511 * the original hostname as is. 512 */ 513 copyasis: 514 strlcpy(editedhost, HN, sizeof(editedhost)); 515 } 516 517 static struct speedtab { 518 int speed; 519 int uxname; 520 } speedtab[] = { 521 { 50, B50 }, 522 { 75, B75 }, 523 { 110, B110 }, 524 { 134, B134 }, 525 { 150, B150 }, 526 { 200, B200 }, 527 { 300, B300 }, 528 { 600, B600 }, 529 { 1200, B1200 }, 530 { 1800, B1800 }, 531 { 2400, B2400 }, 532 { 4800, B4800 }, 533 { 9600, B9600 }, 534 { 19200, EXTA }, 535 { 19, EXTA }, /* for people who say 19.2K */ 536 { 38400, EXTB }, 537 { 38, EXTB }, 538 { 7200, EXTB }, /* alternative */ 539 { 57600, B57600 }, 540 { 115200, B115200 }, 541 { 230400, B230400 }, 542 { 0, 0 } 543 }; 544 545 int 546 speed(int val) 547 { 548 struct speedtab *sp; 549 550 if (val <= B230400) 551 return (val); 552 553 for (sp = speedtab; sp->speed; sp++) 554 if (sp->speed == val) 555 return (sp->uxname); 556 557 return (B300); /* default in impossible cases */ 558 } 559 560 void 561 makeenv(char *env[]) 562 { 563 static char termbuf[128] = "TERM="; 564 char *p, *q; 565 char **ep; 566 567 ep = env; 568 if (TT && *TT) { 569 strlcat(termbuf, TT, sizeof(termbuf)); 570 *ep++ = termbuf; 571 } 572 if ((p = EV)) { 573 q = p; 574 while ((q = strchr(q, ','))) { 575 *q++ = '\0'; 576 *ep++ = p; 577 p = q; 578 } 579 if (*p) 580 *ep++ = p; 581 } 582 *ep = (char *)0; 583 } 584 585 /* 586 * This speed select mechanism is written for the Develcon DATASWITCH. 587 * The Develcon sends a string of the form "B{speed}\n" at a predefined 588 * baud rate. This string indicates the user's actual speed. 589 * The routine below returns the terminal type mapped from derived speed. 590 */ 591 static struct portselect { 592 const char *ps_baud; 593 const char *ps_type; 594 } portspeeds[] = { 595 { "B110", "std.110" }, 596 { "B134", "std.134" }, 597 { "B150", "std.150" }, 598 { "B300", "std.300" }, 599 { "B600", "std.600" }, 600 { "B1200", "std.1200" }, 601 { "B2400", "std.2400" }, 602 { "B4800", "std.4800" }, 603 { "B9600", "std.9600" }, 604 { "B19200", "std.19200" }, 605 { NULL, NULL } 606 }; 607 608 const char * 609 portselector(void) 610 { 611 char c, baud[20]; 612 const char *type = "default"; 613 struct portselect *ps; 614 size_t len; 615 616 alarm(5*60); 617 for (len = 0; len < sizeof (baud) - 1; len++) { 618 if (read(STDIN_FILENO, &c, 1) <= 0) 619 break; 620 c &= 0177; 621 if (c == '\n' || c == '\r') 622 break; 623 if (c == 'B') 624 len = 0; /* in case of leading garbage */ 625 baud[len] = c; 626 } 627 baud[len] = '\0'; 628 for (ps = portspeeds; ps->ps_baud; ps++) 629 if (strcmp(ps->ps_baud, baud) == 0) { 630 type = ps->ps_type; 631 break; 632 } 633 sleep(2); /* wait for connection to complete */ 634 return (type); 635 } 636 637 /* 638 * This auto-baud speed select mechanism is written for the Micom 600 639 * portselector. Selection is done by looking at how the character '\r' 640 * is garbled at the different speeds. 641 */ 642 const char * 643 autobaud(void) 644 { 645 struct pollfd set[1]; 646 struct timespec timeout; 647 char c; 648 const char *type = "9600-baud"; 649 650 (void)tcflush(0, TCIOFLUSH); 651 set[0].fd = STDIN_FILENO; 652 set[0].events = POLLIN; 653 if (poll(set, 1, 5000) <= 0) 654 return (type); 655 if (read(STDIN_FILENO, &c, sizeof(char)) != sizeof(char)) 656 return (type); 657 timeout.tv_sec = 0; 658 timeout.tv_nsec = 20000; 659 (void)nanosleep(&timeout, NULL); 660 (void)tcflush(0, TCIOFLUSH); 661 switch (c & 0377) { 662 663 case 0200: /* 300-baud */ 664 type = "300-baud"; 665 break; 666 667 case 0346: /* 1200-baud */ 668 type = "1200-baud"; 669 break; 670 671 case 015: /* 2400-baud */ 672 case 0215: 673 type = "2400-baud"; 674 break; 675 676 default: /* 4800-baud */ 677 type = "4800-baud"; 678 break; 679 680 case 0377: /* 9600-baud */ 681 type = "9600-baud"; 682 break; 683 } 684 return (type); 685 } 686