1 /* $NetBSD: subr.c,v 1.28 2002/09/23 12:48:02 mycroft Exp $ */ 2 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 #if 0 39 static char sccsid[] = "from: @(#)subr.c 8.1 (Berkeley) 6/4/93"; 40 #else 41 __RCSID("$NetBSD: subr.c,v 1.28 2002/09/23 12:48:02 mycroft Exp $"); 42 #endif 43 #endif /* not lint */ 44 45 /* 46 * Melbourne getty. 47 */ 48 #define COMPAT_43 49 #include <sys/param.h> 50 #include <sys/ioctl.h> 51 52 #include <stdlib.h> 53 #include <string.h> 54 #include <termios.h> 55 #include <unistd.h> 56 #include <poll.h> 57 58 #include "extern.h" 59 #include "gettytab.h" 60 #include "pathnames.h" 61 62 extern struct termios tmode, omode; 63 64 static void compatflags(long); 65 66 /* 67 * Get a table entry. 68 */ 69 void 70 gettable(char *name, char *buf) 71 { 72 struct gettystrs *sp; 73 struct gettynums *np; 74 struct gettyflags *fp; 75 long n; 76 char *dba[2]; 77 dba[0] = _PATH_GETTYTAB; 78 dba[1] = 0; 79 80 if (cgetent(&buf, dba, name) != 0) 81 return; 82 83 for (sp = gettystrs; sp->field; sp++) 84 cgetstr(buf, sp->field, &sp->value); 85 for (np = gettynums; np->field; np++) { 86 if (cgetnum(buf, np->field, &n) == -1) 87 np->set = 0; 88 else { 89 np->set = 1; 90 np->value = n; 91 } 92 } 93 for (fp = gettyflags; fp->field; fp++) { 94 if (cgetcap(buf, fp->field, ':') == NULL) 95 fp->set = 0; 96 else { 97 fp->set = 1; 98 fp->value = 1 ^ fp->invrt; 99 } 100 } 101 #ifdef DEBUG 102 printf("name=\"%s\", buf=\"%s\"\n", name, buf); 103 for (sp = gettystrs; sp->field; sp++) 104 printf("cgetstr: %s=%s\n", sp->field, sp->value); 105 for (np = gettynums; np->field; np++) 106 printf("cgetnum: %s=%d\n", np->field, np->value); 107 for (fp = gettyflags; fp->field; fp++) 108 printf("cgetflags: %s='%c' set='%c'\n", fp->field, 109 fp->value + '0', fp->set + '0'); 110 exit(1); 111 #endif /* DEBUG */ 112 } 113 114 void 115 gendefaults(void) 116 { 117 struct gettystrs *sp; 118 struct gettynums *np; 119 struct gettyflags *fp; 120 121 for (sp = gettystrs; sp->field; sp++) 122 if (sp->value) 123 sp->defalt = sp->value; 124 for (np = gettynums; np->field; np++) 125 if (np->set) 126 np->defalt = np->value; 127 for (fp = gettyflags; fp->field; fp++) 128 if (fp->set) 129 fp->defalt = fp->value; 130 else 131 fp->defalt = fp->invrt; 132 } 133 134 void 135 setdefaults(void) 136 { 137 struct gettystrs *sp; 138 struct gettynums *np; 139 struct gettyflags *fp; 140 141 for (sp = gettystrs; sp->field; sp++) 142 if (!sp->value) 143 sp->value = sp->defalt; 144 for (np = gettynums; np->field; np++) 145 if (!np->set) 146 np->value = np->defalt; 147 for (fp = gettyflags; fp->field; fp++) 148 if (!fp->set) 149 fp->value = fp->defalt; 150 } 151 152 static char ** 153 charnames[] = { 154 &ER, &KL, &IN, &QU, &XN, &XF, &ET, &BK, 155 &SU, &DS, &RP, &FL, &WE, &LN, 0 156 }; 157 158 static char * 159 charvars[] = { 160 &tmode.c_cc[VERASE], &tmode.c_cc[VKILL], &tmode.c_cc[VINTR], 161 &tmode.c_cc[VQUIT], &tmode.c_cc[VSTART], &tmode.c_cc[VSTOP], 162 &tmode.c_cc[VEOF], &tmode.c_cc[VEOL], &tmode.c_cc[VSUSP], 163 &tmode.c_cc[VDSUSP], &tmode.c_cc[VREPRINT], &tmode.c_cc[VDISCARD], 164 &tmode.c_cc[VWERASE], &tmode.c_cc[VLNEXT], 0 165 }; 166 167 void 168 setchars(void) 169 { 170 int i; 171 char *p; 172 173 for (i = 0; charnames[i]; i++) { 174 p = *charnames[i]; 175 if (p && *p) 176 *charvars[i] = *p; 177 else 178 *charvars[i] = _POSIX_VDISABLE; 179 } 180 } 181 182 /* Macros to clear/set/test flags. */ 183 #define SET(t, f) (t) |= (f) 184 #define CLR(t, f) (t) &= ~(f) 185 #define ISSET(t, f) ((t) & (f)) 186 187 void 188 setflags(int n) 189 { 190 tcflag_t iflag, oflag, cflag, lflag; 191 192 #ifdef COMPAT_43 193 switch (n) { 194 case 0: 195 if (F0set) { 196 compatflags(F0); 197 return; 198 } 199 break; 200 case 1: 201 if (F1set) { 202 compatflags(F1); 203 return; 204 } 205 break; 206 default: 207 if (F2set) { 208 compatflags(F2); 209 return; 210 } 211 break; 212 } 213 #endif 214 215 switch (n) { 216 case 0: 217 if (C0set && I0set && L0set && O0set) { 218 tmode.c_cflag = C0; 219 tmode.c_iflag = I0; 220 tmode.c_lflag = L0; 221 tmode.c_oflag = O0; 222 return; 223 } 224 break; 225 case 1: 226 if (C1set && I1set && L1set && O1set) { 227 tmode.c_cflag = C1; 228 tmode.c_iflag = I1; 229 tmode.c_lflag = L1; 230 tmode.c_oflag = O1; 231 return; 232 } 233 break; 234 default: 235 if (C2set && I2set && L2set && O2set) { 236 tmode.c_cflag = C2; 237 tmode.c_iflag = I2; 238 tmode.c_lflag = L2; 239 tmode.c_oflag = O2; 240 return; 241 } 242 break; 243 } 244 245 iflag = omode.c_iflag; 246 oflag = omode.c_oflag; 247 cflag = omode.c_cflag; 248 lflag = omode.c_lflag; 249 250 if (NP) { 251 CLR(cflag, CSIZE|PARENB); 252 SET(cflag, CS8); 253 CLR(iflag, ISTRIP|INPCK|IGNPAR); 254 } else if (AP || EP || OP) { 255 CLR(cflag, CSIZE); 256 SET(cflag, CS7|PARENB); 257 SET(iflag, ISTRIP); 258 if (OP && !EP) { 259 SET(iflag, INPCK|IGNPAR); 260 SET(cflag, PARODD); 261 if (AP) 262 CLR(iflag, INPCK); 263 } else if (EP && !OP) { 264 SET(iflag, INPCK|IGNPAR); 265 CLR(cflag, PARODD); 266 if (AP) 267 CLR(iflag, INPCK); 268 } else if (AP || (EP && OP)) { 269 CLR(iflag, INPCK|IGNPAR); 270 CLR(cflag, PARODD); 271 } 272 } /* else, leave as is */ 273 274 #if 0 275 if (UC) 276 f |= LCASE; 277 #endif 278 279 if (HC) 280 SET(cflag, HUPCL); 281 else 282 CLR(cflag, HUPCL); 283 284 if (MB) 285 SET(cflag, MDMBUF); 286 else 287 CLR(cflag, MDMBUF); 288 289 if (NL) { 290 SET(iflag, ICRNL); 291 SET(oflag, ONLCR|OPOST); 292 } else { 293 CLR(iflag, ICRNL); 294 CLR(oflag, ONLCR); 295 } 296 297 if (!HT) 298 SET(oflag, OXTABS|OPOST); 299 else 300 CLR(oflag, OXTABS); 301 302 #ifdef XXX_DELAY 303 SET(f, delaybits()); 304 #endif 305 306 if (n == 1) { /* read mode flags */ 307 if (RW) { 308 iflag = 0; 309 CLR(oflag, OPOST); 310 CLR(cflag, CSIZE|PARENB); 311 SET(cflag, CS8); 312 lflag = 0; 313 } else { 314 CLR(lflag, ICANON); 315 } 316 goto out; 317 } 318 319 if (n == 0) 320 goto out; 321 322 #if 0 323 if (CB) 324 SET(f, CRTBS); 325 #endif 326 327 if (CE) 328 SET(lflag, ECHOE); 329 else 330 CLR(lflag, ECHOE); 331 332 if (CK) 333 SET(lflag, ECHOKE); 334 else 335 CLR(lflag, ECHOKE); 336 337 if (PE) 338 SET(lflag, ECHOPRT); 339 else 340 CLR(lflag, ECHOPRT); 341 342 if (EC) 343 SET(lflag, ECHO); 344 else 345 CLR(lflag, ECHO); 346 347 if (XC) 348 SET(lflag, ECHOCTL); 349 else 350 CLR(lflag, ECHOCTL); 351 352 if (DX) 353 SET(lflag, IXANY); 354 else 355 CLR(lflag, IXANY); 356 357 out: 358 tmode.c_iflag = iflag; 359 tmode.c_oflag = oflag; 360 tmode.c_cflag = cflag; 361 tmode.c_lflag = lflag; 362 } 363 364 #ifdef COMPAT_43 365 /* 366 * Old TTY => termios, snatched from <sys/kern/tty_compat.c> 367 */ 368 void 369 compatflags(long flags) 370 { 371 tcflag_t iflag, oflag, cflag, lflag; 372 373 iflag = BRKINT|ICRNL|IMAXBEL|IXON|IXANY; 374 oflag = OPOST|ONLCR|OXTABS; 375 cflag = CREAD; 376 lflag = ICANON|ISIG|IEXTEN; 377 378 if (ISSET(flags, TANDEM)) 379 SET(iflag, IXOFF); 380 else 381 CLR(iflag, IXOFF); 382 if (ISSET(flags, ECHO)) 383 SET(lflag, ECHO); 384 else 385 CLR(lflag, ECHO); 386 if (ISSET(flags, CRMOD)) { 387 SET(iflag, ICRNL); 388 SET(oflag, ONLCR); 389 } else { 390 CLR(iflag, ICRNL); 391 CLR(oflag, ONLCR); 392 } 393 if (ISSET(flags, XTABS)) 394 SET(oflag, OXTABS); 395 else 396 CLR(oflag, OXTABS); 397 398 399 if (ISSET(flags, RAW)) { 400 iflag &= IXOFF; 401 CLR(lflag, ISIG|ICANON|IEXTEN); 402 CLR(cflag, PARENB); 403 } else { 404 SET(iflag, BRKINT|IXON|IMAXBEL); 405 SET(lflag, ISIG|IEXTEN); 406 if (ISSET(flags, CBREAK)) 407 CLR(lflag, ICANON); 408 else 409 SET(lflag, ICANON); 410 switch (ISSET(flags, ANYP)) { 411 case 0: 412 CLR(cflag, PARENB); 413 break; 414 case ANYP: 415 SET(cflag, PARENB); 416 CLR(iflag, INPCK); 417 break; 418 case EVENP: 419 SET(cflag, PARENB); 420 SET(iflag, INPCK); 421 CLR(cflag, PARODD); 422 break; 423 case ODDP: 424 SET(cflag, PARENB); 425 SET(iflag, INPCK); 426 SET(cflag, PARODD); 427 break; 428 } 429 } 430 431 /* Nothing we can do with CRTBS. */ 432 if (ISSET(flags, PRTERA)) 433 SET(lflag, ECHOPRT); 434 else 435 CLR(lflag, ECHOPRT); 436 if (ISSET(flags, CRTERA)) 437 SET(lflag, ECHOE); 438 else 439 CLR(lflag, ECHOE); 440 /* Nothing we can do with TILDE. */ 441 if (ISSET(flags, MDMBUF)) 442 SET(cflag, MDMBUF); 443 else 444 CLR(cflag, MDMBUF); 445 if (ISSET(flags, NOHANG)) 446 CLR(cflag, HUPCL); 447 else 448 SET(cflag, HUPCL); 449 if (ISSET(flags, CRTKIL)) 450 SET(lflag, ECHOKE); 451 else 452 CLR(lflag, ECHOKE); 453 if (ISSET(flags, CTLECH)) 454 SET(lflag, ECHOCTL); 455 else 456 CLR(lflag, ECHOCTL); 457 if (!ISSET(flags, DECCTQ)) 458 SET(iflag, IXANY); 459 else 460 CLR(iflag, IXANY); 461 CLR(lflag, TOSTOP|FLUSHO|PENDIN|NOFLSH); 462 SET(lflag, ISSET(flags, TOSTOP|FLUSHO|PENDIN|NOFLSH)); 463 464 if (ISSET(flags, RAW|LITOUT|PASS8)) { 465 CLR(cflag, CSIZE); 466 SET(cflag, CS8); 467 if (!ISSET(flags, RAW|PASS8)) 468 SET(iflag, ISTRIP); 469 else 470 CLR(iflag, ISTRIP); 471 if (!ISSET(flags, RAW|LITOUT)) 472 SET(oflag, OPOST); 473 else 474 CLR(oflag, OPOST); 475 } else { 476 CLR(cflag, CSIZE); 477 SET(cflag, CS7); 478 SET(iflag, ISTRIP); 479 SET(oflag, OPOST); 480 } 481 482 tmode.c_iflag = iflag; 483 tmode.c_oflag = oflag; 484 tmode.c_cflag = cflag; 485 tmode.c_lflag = lflag; 486 } 487 #endif 488 489 #ifdef XXX_DELAY 490 struct delayval { 491 unsigned delay; /* delay in ms */ 492 int bits; 493 }; 494 495 /* 496 * below are random guesses, I can't be bothered checking 497 */ 498 499 struct delayval crdelay[] = { 500 { 1, CR1 }, 501 { 2, CR2 }, 502 { 3, CR3 }, 503 { 83, CR1 }, 504 { 166, CR2 }, 505 { 0, CR3 }, 506 }; 507 508 struct delayval nldelay[] = { 509 { 1, NL1 }, /* special, calculated */ 510 { 2, NL2 }, 511 { 3, NL3 }, 512 { 100, NL2 }, 513 { 0, NL3 }, 514 }; 515 516 struct delayval bsdelay[] = { 517 { 1, BS1 }, 518 { 0, 0 }, 519 }; 520 521 struct delayval ffdelay[] = { 522 { 1, FF1 }, 523 { 1750, FF1 }, 524 { 0, FF1 }, 525 }; 526 527 struct delayval tbdelay[] = { 528 { 1, TAB1 }, 529 { 2, TAB2 }, 530 { 3, XTABS }, /* this is expand tabs */ 531 { 100, TAB1 }, 532 { 0, TAB2 }, 533 }; 534 535 int 536 delaybits(void) 537 { 538 int f; 539 540 f = adelay(CD, crdelay); 541 f |= adelay(ND, nldelay); 542 f |= adelay(FD, ffdelay); 543 f |= adelay(TD, tbdelay); 544 f |= adelay(BD, bsdelay); 545 return (f); 546 } 547 548 int 549 adelay(int ms, struct delayval *dp) 550 { 551 if (ms == 0) 552 return (0); 553 while (dp->delay && ms > dp->delay) 554 dp++; 555 return (dp->bits); 556 } 557 #endif 558 559 char editedhost[MAXHOSTNAMELEN]; 560 561 void 562 edithost(char *pat) 563 { 564 char *host = HN; 565 char *res = editedhost; 566 567 if (!pat) 568 pat = ""; 569 while (*pat) { 570 switch (*pat) { 571 572 case '#': 573 if (*host) 574 host++; 575 break; 576 577 case '@': 578 if (*host) 579 *res++ = *host++; 580 break; 581 582 default: 583 *res++ = *pat; 584 break; 585 586 } 587 if (res == &editedhost[sizeof editedhost - 1]) { 588 *res = '\0'; 589 return; 590 } 591 pat++; 592 } 593 if (*host) 594 strncpy(res, host, sizeof editedhost - (res - editedhost) - 1); 595 else 596 *res = '\0'; 597 editedhost[sizeof editedhost - 1] = '\0'; 598 } 599 600 void 601 makeenv(char *env[]) 602 { 603 static char termbuf[128] = "TERM="; 604 char *p, *q; 605 char **ep; 606 607 ep = env; 608 if (TT && *TT) { 609 strlcat(termbuf, TT, sizeof(termbuf)); 610 *ep++ = termbuf; 611 } 612 if ((p = EV) != NULL) { 613 q = p; 614 while ((q = strchr(q, ',')) != NULL) { 615 *q++ = '\0'; 616 *ep++ = p; 617 p = q; 618 } 619 if (*p) 620 *ep++ = p; 621 } 622 *ep = (char *)0; 623 } 624 625 /* 626 * This speed select mechanism is written for the Develcon DATASWITCH. 627 * The Develcon sends a string of the form "B{speed}\n" at a predefined 628 * baud rate. This string indicates the user's actual speed. 629 * The routine below returns the terminal type mapped from derived speed. 630 */ 631 struct portselect { 632 char *ps_baud; 633 char *ps_type; 634 } portspeeds[] = { 635 { "B110", "std.110" }, 636 { "B134", "std.134" }, 637 { "B150", "std.150" }, 638 { "B300", "std.300" }, 639 { "B600", "std.600" }, 640 { "B1200", "std.1200" }, 641 { "B2400", "std.2400" }, 642 { "B4800", "std.4800" }, 643 { "B9600", "std.9600" }, 644 { "B19200", "std.19200" }, 645 { 0 } 646 }; 647 648 char * 649 portselector(void) 650 { 651 char c, baud[20], *type = "default"; 652 struct portselect *ps; 653 int len; 654 655 alarm(5*60); 656 for (len = 0; len < sizeof (baud) - 1; len++) { 657 if (read(STDIN_FILENO, &c, 1) <= 0) 658 break; 659 c &= 0177; 660 if (c == '\n' || c == '\r') 661 break; 662 if (c == 'B') 663 len = 0; /* in case of leading garbage */ 664 baud[len] = c; 665 } 666 baud[len] = '\0'; 667 for (ps = portspeeds; ps->ps_baud; ps++) 668 if (strcmp(ps->ps_baud, baud) == 0) { 669 type = ps->ps_type; 670 break; 671 } 672 sleep(2); /* wait for connection to complete */ 673 return (type); 674 } 675 676 /* 677 * This auto-baud speed select mechanism is written for the Micom 600 678 * portselector. Selection is done by looking at how the character '\r' 679 * is garbled at the different speeds. 680 */ 681 #include <sys/time.h> 682 683 char * 684 autobaud(void) 685 { 686 struct pollfd set[1]; 687 struct timespec timeout; 688 char c, *type = "9600-baud"; 689 690 (void)tcflush(0, TCIOFLUSH); 691 set[0].fd = STDIN_FILENO; 692 set[0].events = POLLIN; 693 if (poll(set, 1, 5000) <= 0) 694 return (type); 695 if (read(STDIN_FILENO, &c, 1) != 1) 696 return (type); 697 timeout.tv_sec = 0; 698 timeout.tv_nsec = 20000; 699 (void)nanosleep(&timeout, NULL); 700 (void)tcflush(0, TCIOFLUSH); 701 switch (c & 0377) { 702 703 case 0200: /* 300-baud */ 704 type = "300-baud"; 705 break; 706 707 case 0346: /* 1200-baud */ 708 type = "1200-baud"; 709 break; 710 711 case 015: /* 2400-baud */ 712 case 0215: 713 type = "2400-baud"; 714 break; 715 716 default: /* 4800-baud */ 717 type = "4800-baud"; 718 break; 719 720 case 0377: /* 9600-baud */ 721 type = "9600-baud"; 722 break; 723 } 724 return (type); 725 } 726