1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1980, 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 static const char copyright[] = 34 "@(#) Copyright (c) 1980, 1993\n\ 35 The Regents of the University of California. All rights reserved.\n"; 36 #endif /* not lint */ 37 38 #ifndef lint 39 #if 0 40 static char sccsid[] = "@(#)from: main.c 8.1 (Berkeley) 6/20/93"; 41 #endif 42 #endif /* not lint */ 43 #include <sys/cdefs.h> 44 __FBSDID("$FreeBSD$"); 45 46 #include <sys/param.h> 47 #include <sys/ioctl.h> 48 #include <sys/time.h> 49 #include <sys/resource.h> 50 #include <sys/stat.h> 51 #include <sys/ttydefaults.h> 52 #include <sys/utsname.h> 53 54 #include <ctype.h> 55 #include <errno.h> 56 #include <fcntl.h> 57 #include <locale.h> 58 #include <libutil.h> 59 #include <setjmp.h> 60 #include <signal.h> 61 #include <stdlib.h> 62 #include <string.h> 63 #include <syslog.h> 64 #include <termios.h> 65 #include <time.h> 66 #include <unistd.h> 67 68 #include "gettytab.h" 69 #include "extern.h" 70 #include "pathnames.h" 71 72 /* 73 * Set the amount of running time that getty should accumulate 74 * before deciding that something is wrong and exit. 75 */ 76 #define GETTY_TIMEOUT 60 /* seconds */ 77 78 #undef CTRL 79 #define CTRL(x) (x&037) 80 81 /* defines for auto detection of incoming PPP calls (->PAP/CHAP) */ 82 83 #define PPP_FRAME 0x7e /* PPP Framing character */ 84 #define PPP_STATION 0xff /* "All Station" character */ 85 #define PPP_ESCAPE 0x7d /* Escape Character */ 86 #define PPP_CONTROL 0x03 /* PPP Control Field */ 87 #define PPP_CONTROL_ESCAPED 0x23 /* PPP Control Field, escaped */ 88 #define PPP_LCP_HI 0xc0 /* LCP protocol - high byte */ 89 #define PPP_LCP_LOW 0x21 /* LCP protocol - low byte */ 90 91 /* original mode; flags've been reset using values from <sys/ttydefaults.h> */ 92 struct termios omode; 93 /* current mode */ 94 struct termios tmode; 95 96 static int crmod, digit, lower, upper; 97 98 char hostname[MAXHOSTNAMELEN]; 99 static char name[MAXLOGNAME*3]; 100 static char dev[] = _PATH_DEV; 101 static char ttyn[32]; 102 103 #define OBUFSIZ 128 104 #define TABBUFSIZ 512 105 106 static char defent[TABBUFSIZ]; 107 static char tabent[TABBUFSIZ]; 108 static const char *tname; 109 110 static char *env[128]; 111 112 static char partab[] = { 113 0001,0201,0201,0001,0201,0001,0001,0201, 114 0202,0004,0003,0205,0005,0206,0201,0001, 115 0201,0001,0001,0201,0001,0201,0201,0001, 116 0001,0201,0201,0001,0201,0001,0001,0201, 117 0200,0000,0000,0200,0000,0200,0200,0000, 118 0000,0200,0200,0000,0200,0000,0000,0200, 119 0000,0200,0200,0000,0200,0000,0000,0200, 120 0200,0000,0000,0200,0000,0200,0200,0000, 121 0200,0000,0000,0200,0000,0200,0200,0000, 122 0000,0200,0200,0000,0200,0000,0000,0200, 123 0000,0200,0200,0000,0200,0000,0000,0200, 124 0200,0000,0000,0200,0000,0200,0200,0000, 125 0000,0200,0200,0000,0200,0000,0000,0200, 126 0200,0000,0000,0200,0000,0200,0200,0000, 127 0200,0000,0000,0200,0000,0200,0200,0000, 128 0000,0200,0200,0000,0200,0000,0000,0201 129 }; 130 131 #define ERASE tmode.c_cc[VERASE] 132 #define KILL tmode.c_cc[VKILL] 133 #define EOT tmode.c_cc[VEOF] 134 135 #define puts Gputs 136 137 static void defttymode(void); 138 static void dingdong(int); 139 static void dogettytab(void); 140 static int getname(void); 141 static void interrupt(int); 142 static void oflush(void); 143 static void prompt(void); 144 static void putchr(int); 145 static void putf(const char *); 146 static void putpad(const char *); 147 static void puts(const char *); 148 static void timeoverrun(int); 149 static char *get_line(int); 150 static void setttymode(int); 151 static int opentty(const char *, int); 152 153 static jmp_buf timeout; 154 155 static void 156 dingdong(int signo __unused) 157 { 158 alarm(0); 159 longjmp(timeout, 1); 160 } 161 162 static jmp_buf intrupt; 163 164 static void 165 interrupt(int signo __unused) 166 { 167 longjmp(intrupt, 1); 168 } 169 170 /* 171 * Action to take when getty is running too long. 172 */ 173 static void 174 timeoverrun(int signo __unused) 175 { 176 177 syslog(LOG_ERR, "getty exiting due to excessive running time"); 178 exit(1); 179 } 180 181 int 182 main(int argc, char *argv[]) 183 { 184 int first_sleep = 1, first_time = 1; 185 struct rlimit limit; 186 int rval; 187 188 signal(SIGINT, SIG_IGN); 189 signal(SIGQUIT, SIG_IGN); 190 191 openlog("getty", LOG_CONS|LOG_PID, LOG_AUTH); 192 gethostname(hostname, sizeof(hostname) - 1); 193 hostname[sizeof(hostname) - 1] = '\0'; 194 if (hostname[0] == '\0') 195 strcpy(hostname, "Amnesiac"); 196 197 /* 198 * Limit running time to deal with broken or dead lines. 199 */ 200 (void)signal(SIGXCPU, timeoverrun); 201 limit.rlim_max = RLIM_INFINITY; 202 limit.rlim_cur = GETTY_TIMEOUT; 203 (void)setrlimit(RLIMIT_CPU, &limit); 204 205 gettable("default", defent); 206 gendefaults(); 207 tname = "default"; 208 if (argc > 1) 209 tname = argv[1]; 210 211 /* 212 * The following is a work around for vhangup interactions 213 * which cause great problems getting window systems started. 214 * If the tty line is "-", we do the old style getty presuming 215 * that the file descriptors are already set up for us. 216 * J. Gettys - MIT Project Athena. 217 */ 218 if (argc <= 2 || strcmp(argv[2], "-") == 0) 219 strcpy(ttyn, ttyname(STDIN_FILENO)); 220 else { 221 strcpy(ttyn, dev); 222 strncat(ttyn, argv[2], sizeof(ttyn)-sizeof(dev)); 223 if (strcmp(argv[0], "+") != 0) { 224 chown(ttyn, 0, 0); 225 chmod(ttyn, 0600); 226 revoke(ttyn); 227 228 /* 229 * Do the first scan through gettytab. 230 * Terminal mode parameters will be wrong until 231 * defttymode() called, but they're irrelevant for 232 * the initial setup of the terminal device. 233 */ 234 dogettytab(); 235 236 /* 237 * Init or answer modem sequence has been specified. 238 */ 239 if (IC || AC) { 240 if (!opentty(ttyn, O_RDWR|O_NONBLOCK)) 241 exit(1); 242 defttymode(); 243 setttymode(1); 244 } 245 246 if (IC) { 247 if (getty_chat(IC, CT, DC) > 0) { 248 syslog(LOG_ERR, "modem init problem on %s", ttyn); 249 (void)tcsetattr(STDIN_FILENO, TCSANOW, &tmode); 250 exit(1); 251 } 252 } 253 254 if (AC) { 255 fd_set rfds; 256 struct timeval to; 257 int i; 258 259 FD_ZERO(&rfds); 260 FD_SET(0, &rfds); 261 to.tv_sec = RT; 262 to.tv_usec = 0; 263 i = select(32, &rfds, NULL, NULL, RT ? &to : NULL); 264 if (i < 0) { 265 syslog(LOG_ERR, "select %s: %m", ttyn); 266 } else if (i == 0) { 267 syslog(LOG_NOTICE, "recycle tty %s", ttyn); 268 (void)tcsetattr(STDIN_FILENO, TCSANOW, &tmode); 269 exit(0); /* recycle for init */ 270 } 271 i = getty_chat(AC, CT, DC); 272 if (i > 0) { 273 syslog(LOG_ERR, "modem answer problem on %s", ttyn); 274 (void)tcsetattr(STDIN_FILENO, TCSANOW, &tmode); 275 exit(1); 276 } 277 } else { /* maybe blocking open */ 278 if (!opentty(ttyn, O_RDWR | (NC ? O_NONBLOCK : 0 ))) 279 exit(1); 280 } 281 } 282 } 283 284 defttymode(); 285 for (;;) { 286 287 /* 288 * if a delay was specified then sleep for that 289 * number of seconds before writing the initial prompt 290 */ 291 if (first_sleep && DE) { 292 sleep(DE); 293 /* remove any noise */ 294 (void)tcflush(STDIN_FILENO, TCIOFLUSH); 295 } 296 first_sleep = 0; 297 298 setttymode(0); 299 if (AB) { 300 tname = autobaud(); 301 dogettytab(); 302 continue; 303 } 304 if (PS) { 305 tname = portselector(); 306 dogettytab(); 307 continue; 308 } 309 if (CL && *CL) 310 putpad(CL); 311 edithost(HE); 312 313 /* if this is the first time through this, and an 314 issue file has been given, then send it */ 315 if (first_time && IF) { 316 int fd; 317 318 if ((fd = open(IF, O_RDONLY)) != -1) { 319 char * cp; 320 321 while ((cp = get_line(fd)) != NULL) { 322 putf(cp); 323 } 324 close(fd); 325 } 326 } 327 first_time = 0; 328 329 if (IMP && *IMP && !(PL && PP)) 330 system(IMP); 331 if (IM && *IM && !(PL && PP)) 332 putf(IM); 333 if (setjmp(timeout)) { 334 cfsetispeed(&tmode, B0); 335 cfsetospeed(&tmode, B0); 336 (void)tcsetattr(STDIN_FILENO, TCSANOW, &tmode); 337 exit(1); 338 } 339 if (TO) { 340 signal(SIGALRM, dingdong); 341 alarm(TO); 342 } 343 344 rval = 0; 345 if (AL) { 346 const char *p = AL; 347 char *q = name; 348 349 while (*p && q < &name[sizeof name - 1]) { 350 if (isupper(*p)) 351 upper = 1; 352 else if (islower(*p)) 353 lower = 1; 354 else if (isdigit(*p)) 355 digit = 1; 356 *q++ = *p++; 357 } 358 } else if (!(PL && PP)) 359 rval = getname(); 360 if (rval == 2 || (PL && PP)) { 361 oflush(); 362 alarm(0); 363 limit.rlim_max = RLIM_INFINITY; 364 limit.rlim_cur = RLIM_INFINITY; 365 (void)setrlimit(RLIMIT_CPU, &limit); 366 execle(PP, "ppplogin", ttyn, (char *) 0, env); 367 syslog(LOG_ERR, "%s: %m", PP); 368 exit(1); 369 } else if (rval || AL) { 370 int i; 371 372 oflush(); 373 alarm(0); 374 signal(SIGALRM, SIG_DFL); 375 if (name[0] == '\0') 376 continue; 377 if (name[0] == '-') { 378 puts("user names may not start with '-'."); 379 continue; 380 } 381 if (!(upper || lower || digit)) { 382 if (AL) { 383 syslog(LOG_ERR, 384 "invalid auto-login name: %s", AL); 385 exit(1); 386 } else 387 continue; 388 } 389 set_flags(2); 390 if (crmod) { 391 tmode.c_iflag |= ICRNL; 392 tmode.c_oflag |= ONLCR; 393 } 394 #if REALLY_OLD_TTYS 395 if (upper || UC) 396 tmode.sg_flags |= LCASE; 397 if (lower || LC) 398 tmode.sg_flags &= ~LCASE; 399 #endif 400 if (tcsetattr(STDIN_FILENO, TCSANOW, &tmode) < 0) { 401 syslog(LOG_ERR, "tcsetattr %s: %m", ttyn); 402 exit(1); 403 } 404 signal(SIGINT, SIG_DFL); 405 for (i = 0; environ[i] != (char *)0; i++) 406 env[i] = environ[i]; 407 makeenv(&env[i]); 408 409 limit.rlim_max = RLIM_INFINITY; 410 limit.rlim_cur = RLIM_INFINITY; 411 (void)setrlimit(RLIMIT_CPU, &limit); 412 execle(LO, "login", AL ? "-fp" : "-p", name, 413 (char *) 0, env); 414 syslog(LOG_ERR, "%s: %m", LO); 415 exit(1); 416 } 417 alarm(0); 418 signal(SIGALRM, SIG_DFL); 419 signal(SIGINT, SIG_IGN); 420 if (NX && *NX) { 421 tname = NX; 422 dogettytab(); 423 } 424 } 425 } 426 427 static int 428 opentty(const char *tty, int flags) 429 { 430 int i; 431 int failopenlogged = 0; 432 433 while ((i = open(tty, flags)) == -1) 434 { 435 if (!failopenlogged) { 436 syslog(LOG_ERR, "open %s: %m", tty); 437 failopenlogged = 1; 438 } 439 sleep(60); 440 } 441 if (login_tty(i) < 0) { 442 if (daemon(0,0) < 0) { 443 syslog(LOG_ERR,"daemon: %m"); 444 close(i); 445 return 0; 446 } 447 if (login_tty(i) < 0) { 448 syslog(LOG_ERR, "login_tty %s: %m", tty); 449 close(i); 450 return 0; 451 } 452 } 453 return 1; 454 } 455 456 static void 457 defttymode(void) 458 { 459 struct termios def; 460 461 /* Start with default tty settings. */ 462 if (tcgetattr(STDIN_FILENO, &tmode) < 0) { 463 syslog(LOG_ERR, "tcgetattr %s: %m", ttyn); 464 exit(1); 465 } 466 omode = tmode; /* fill c_cc for dogettytab() */ 467 dogettytab(); 468 /* 469 * Don't rely on the driver too much, and initialize crucial 470 * things according to <sys/ttydefaults.h>. Avoid clobbering 471 * the c_cc[] settings however, the console drivers might wish 472 * to leave their idea of the preferred VERASE key value 473 * there. 474 */ 475 cfmakesane(&def); 476 tmode.c_iflag = def.c_iflag; 477 tmode.c_oflag = def.c_oflag; 478 tmode.c_lflag = def.c_lflag; 479 tmode.c_cflag = def.c_cflag; 480 if (NC) 481 tmode.c_cflag |= CLOCAL; 482 omode = tmode; 483 } 484 485 static void 486 setttymode(int raw) 487 { 488 int off = 0; 489 490 (void)tcflush(STDIN_FILENO, TCIOFLUSH); /* clear out the crap */ 491 ioctl(STDIN_FILENO, FIONBIO, &off); /* turn off non-blocking mode */ 492 ioctl(STDIN_FILENO, FIOASYNC, &off); /* ditto for async mode */ 493 494 if (IS) 495 cfsetispeed(&tmode, speed(IS)); 496 else if (SP) 497 cfsetispeed(&tmode, speed(SP)); 498 if (OS) 499 cfsetospeed(&tmode, speed(OS)); 500 else if (SP) 501 cfsetospeed(&tmode, speed(SP)); 502 set_flags(0); 503 setchars(); 504 if (raw) 505 cfmakeraw(&tmode); 506 if (tcsetattr(STDIN_FILENO, TCSANOW, &tmode) < 0) { 507 syslog(LOG_ERR, "tcsetattr %s: %m", ttyn); 508 exit(1); 509 } 510 } 511 512 513 static int 514 getname(void) 515 { 516 int c; 517 char *np; 518 unsigned char cs; 519 int ppp_state = 0; 520 int ppp_connection = 0; 521 522 /* 523 * Interrupt may happen if we use CBREAK mode 524 */ 525 if (setjmp(intrupt)) { 526 signal(SIGINT, SIG_IGN); 527 return (0); 528 } 529 signal(SIGINT, interrupt); 530 set_flags(1); 531 prompt(); 532 oflush(); 533 if (PF > 0) { 534 sleep(PF); 535 PF = 0; 536 } 537 if (tcsetattr(STDIN_FILENO, TCSANOW, &tmode) < 0) { 538 syslog(LOG_ERR, "%s: %m", ttyn); 539 exit(1); 540 } 541 crmod = digit = lower = upper = 0; 542 np = name; 543 for (;;) { 544 oflush(); 545 if (read(STDIN_FILENO, &cs, 1) <= 0) 546 exit(0); 547 if ((c = cs&0177) == 0) 548 return (0); 549 550 /* PPP detection state machine.. 551 Look for sequences: 552 PPP_FRAME, PPP_STATION, PPP_ESCAPE, PPP_CONTROL_ESCAPED or 553 PPP_FRAME, PPP_STATION, PPP_CONTROL (deviant from RFC) 554 See RFC1662. 555 Derived from code from Michael Hancock, <michaelh@cet.co.jp> 556 and Erik 'PPP' Olson, <eriko@wrq.com> 557 */ 558 559 if (PP && (cs == PPP_FRAME)) { 560 ppp_state = 1; 561 } else if (ppp_state == 1 && cs == PPP_STATION) { 562 ppp_state = 2; 563 } else if (ppp_state == 2 && cs == PPP_ESCAPE) { 564 ppp_state = 3; 565 } else if ((ppp_state == 2 && cs == PPP_CONTROL) 566 || (ppp_state == 3 && cs == PPP_CONTROL_ESCAPED)) { 567 ppp_state = 4; 568 } else if (ppp_state == 4 && cs == PPP_LCP_HI) { 569 ppp_state = 5; 570 } else if (ppp_state == 5 && cs == PPP_LCP_LOW) { 571 ppp_connection = 1; 572 break; 573 } else { 574 ppp_state = 0; 575 } 576 577 if (c == EOT || c == CTRL('d')) 578 exit(0); 579 if (c == '\r' || c == '\n' || np >= &name[sizeof name-1]) { 580 putf("\r\n"); 581 break; 582 } 583 if (islower(c)) 584 lower = 1; 585 else if (isupper(c)) 586 upper = 1; 587 else if (c == ERASE || c == '\b' || c == 0177) { 588 if (np > name) { 589 np--; 590 if (cfgetospeed(&tmode) >= 1200) 591 puts("\b \b"); 592 else 593 putchr(cs); 594 } 595 continue; 596 } else if (c == KILL || c == CTRL('u')) { 597 putchr('\r'); 598 if (cfgetospeed(&tmode) < 1200) 599 putchr('\n'); 600 /* this is the way they do it down under ... */ 601 else if (np > name) 602 puts(" \r"); 603 prompt(); 604 digit = lower = upper = 0; 605 np = name; 606 continue; 607 } else if (isdigit(c)) 608 digit = 1; 609 if (IG && (c <= ' ' || c > 0176)) 610 continue; 611 *np++ = c; 612 putchr(cs); 613 } 614 signal(SIGINT, SIG_IGN); 615 *np = 0; 616 if (c == '\r') 617 crmod = 1; 618 if ((upper && !lower && !LC) || UC) 619 for (np = name; *np; np++) 620 if (isupper(*np)) 621 *np = tolower(*np); 622 return (1 + ppp_connection); 623 } 624 625 static void 626 putpad(const char *s) 627 { 628 int pad = 0; 629 speed_t ospeed = cfgetospeed(&tmode); 630 631 if (isdigit(*s)) { 632 while (isdigit(*s)) { 633 pad *= 10; 634 pad += *s++ - '0'; 635 } 636 pad *= 10; 637 if (*s == '.' && isdigit(s[1])) { 638 pad += s[1] - '0'; 639 s += 2; 640 } 641 } 642 643 puts(s); 644 /* 645 * If no delay needed, or output speed is 646 * not comprehensible, then don't try to delay. 647 */ 648 if (pad == 0 || ospeed <= 0) 649 return; 650 651 /* 652 * Round up by a half a character frame, and then do the delay. 653 * Too bad there are no user program accessible programmed delays. 654 * Transmitting pad characters slows many terminals down and also 655 * loads the system. 656 */ 657 pad = (pad * ospeed + 50000) / 100000; 658 while (pad--) 659 putchr(*PC); 660 } 661 662 static void 663 puts(const char *s) 664 { 665 while (*s) 666 putchr(*s++); 667 } 668 669 static char outbuf[OBUFSIZ]; 670 static int obufcnt = 0; 671 672 static void 673 putchr(int cc) 674 { 675 char c; 676 677 c = cc; 678 if (!NP) { 679 c |= partab[c&0177] & 0200; 680 if (OP) 681 c ^= 0200; 682 } 683 if (!UB) { 684 outbuf[obufcnt++] = c; 685 if (obufcnt >= OBUFSIZ) 686 oflush(); 687 } else 688 write(STDOUT_FILENO, &c, 1); 689 } 690 691 static void 692 oflush(void) 693 { 694 if (obufcnt) 695 write(STDOUT_FILENO, outbuf, obufcnt); 696 obufcnt = 0; 697 } 698 699 static void 700 prompt(void) 701 { 702 703 putf(LM); 704 if (CO) 705 putchr('\n'); 706 } 707 708 709 static char * 710 get_line(int fd) 711 { 712 size_t i = 0; 713 static char linebuf[512]; 714 715 /* 716 * This is certainly slow, but it avoids having to include 717 * stdio.h unnecessarily. Issue files should be small anyway. 718 */ 719 while (i < (sizeof linebuf - 3) && read(fd, linebuf+i, 1)==1) { 720 if (linebuf[i] == '\n') { 721 /* Don't rely on newline mode, assume raw */ 722 linebuf[i++] = '\r'; 723 linebuf[i++] = '\n'; 724 linebuf[i] = '\0'; 725 return linebuf; 726 } 727 ++i; 728 } 729 linebuf[i] = '\0'; 730 return i ? linebuf : 0; 731 } 732 733 static void 734 putf(const char *cp) 735 { 736 time_t t; 737 char *slash, db[100]; 738 739 static struct utsname kerninfo; 740 741 if (!*kerninfo.sysname) 742 uname(&kerninfo); 743 744 while (*cp) { 745 if (*cp != '%') { 746 putchr(*cp++); 747 continue; 748 } 749 switch (*++cp) { 750 751 case 't': 752 slash = strrchr(ttyn, '/'); 753 if (slash == (char *) 0) 754 puts(ttyn); 755 else 756 puts(&slash[1]); 757 break; 758 759 case 'h': 760 puts(editedhost); 761 break; 762 763 case 'd': { 764 t = (time_t)0; 765 (void)time(&t); 766 if (Lo) 767 (void)setlocale(LC_TIME, Lo); 768 (void)strftime(db, sizeof(db), DF, localtime(&t)); 769 puts(db); 770 break; 771 772 case 's': 773 puts(kerninfo.sysname); 774 break; 775 776 case 'm': 777 puts(kerninfo.machine); 778 break; 779 780 case 'r': 781 puts(kerninfo.release); 782 break; 783 784 case 'v': 785 puts(kerninfo.version); 786 break; 787 } 788 789 case '%': 790 putchr('%'); 791 break; 792 } 793 cp++; 794 } 795 } 796 797 /* 798 * Read a gettytab database entry and perform necessary quirks. 799 */ 800 static void 801 dogettytab(void) 802 { 803 804 /* Read the database entry. */ 805 gettable(tname, tabent); 806 807 /* 808 * Avoid inheriting the parity values from the default entry 809 * if any of them is set in the current entry. 810 * Mixing different parity settings is unreasonable. 811 */ 812 if (OPset || EPset || APset || NPset) 813 OPset = EPset = APset = NPset = 1; 814 815 /* Fill in default values for unset capabilities. */ 816 setdefaults(); 817 } 818