1 /*- 2 * Copyright (c) 1980, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #ifndef lint 31 static const char copyright[] = 32 "@(#) Copyright (c) 1980, 1993\n\ 33 The Regents of the University of California. All rights reserved.\n"; 34 #endif /* not lint */ 35 36 #ifndef lint 37 #if 0 38 static char sccsid[] = "@(#)from: main.c 8.1 (Berkeley) 6/20/93"; 39 #endif 40 #endif /* not lint */ 41 #include <sys/cdefs.h> 42 __FBSDID("$FreeBSD$"); 43 44 #include <sys/param.h> 45 #include <sys/ioctl.h> 46 #include <sys/time.h> 47 #include <sys/resource.h> 48 #include <sys/stat.h> 49 #include <sys/ttydefaults.h> 50 #include <sys/utsname.h> 51 52 #include <ctype.h> 53 #include <errno.h> 54 #include <fcntl.h> 55 #include <locale.h> 56 #include <libutil.h> 57 #include <setjmp.h> 58 #include <signal.h> 59 #include <stdlib.h> 60 #include <string.h> 61 #include <syslog.h> 62 #include <termios.h> 63 #include <time.h> 64 #include <unistd.h> 65 66 #include "gettytab.h" 67 #include "extern.h" 68 #include "pathnames.h" 69 70 /* 71 * Set the amount of running time that getty should accumulate 72 * before deciding that something is wrong and exit. 73 */ 74 #define GETTY_TIMEOUT 60 /* seconds */ 75 76 #undef CTRL 77 #define CTRL(x) (x&037) 78 79 /* defines for auto detection of incoming PPP calls (->PAP/CHAP) */ 80 81 #define PPP_FRAME 0x7e /* PPP Framing character */ 82 #define PPP_STATION 0xff /* "All Station" character */ 83 #define PPP_ESCAPE 0x7d /* Escape Character */ 84 #define PPP_CONTROL 0x03 /* PPP Control Field */ 85 #define PPP_CONTROL_ESCAPED 0x23 /* PPP Control Field, escaped */ 86 #define PPP_LCP_HI 0xc0 /* LCP protocol - high byte */ 87 #define PPP_LCP_LOW 0x21 /* LCP protocol - low byte */ 88 89 /* original mode; flags've been reset using values from <sys/ttydefaults.h> */ 90 struct termios omode; 91 /* current mode */ 92 struct termios tmode; 93 94 int crmod, digit, lower, upper; 95 96 char hostname[MAXHOSTNAMELEN]; 97 char name[MAXLOGNAME*3]; 98 char dev[] = _PATH_DEV; 99 char ttyn[32]; 100 101 #define OBUFSIZ 128 102 #define TABBUFSIZ 512 103 104 char defent[TABBUFSIZ]; 105 char tabent[TABBUFSIZ]; 106 const char *tname; 107 108 char *env[128]; 109 110 char partab[] = { 111 0001,0201,0201,0001,0201,0001,0001,0201, 112 0202,0004,0003,0205,0005,0206,0201,0001, 113 0201,0001,0001,0201,0001,0201,0201,0001, 114 0001,0201,0201,0001,0201,0001,0001,0201, 115 0200,0000,0000,0200,0000,0200,0200,0000, 116 0000,0200,0200,0000,0200,0000,0000,0200, 117 0000,0200,0200,0000,0200,0000,0000,0200, 118 0200,0000,0000,0200,0000,0200,0200,0000, 119 0200,0000,0000,0200,0000,0200,0200,0000, 120 0000,0200,0200,0000,0200,0000,0000,0200, 121 0000,0200,0200,0000,0200,0000,0000,0200, 122 0200,0000,0000,0200,0000,0200,0200,0000, 123 0000,0200,0200,0000,0200,0000,0000,0200, 124 0200,0000,0000,0200,0000,0200,0200,0000, 125 0200,0000,0000,0200,0000,0200,0200,0000, 126 0000,0200,0200,0000,0200,0000,0000,0201 127 }; 128 129 #define ERASE tmode.c_cc[VERASE] 130 #define KILL tmode.c_cc[VKILL] 131 #define EOT tmode.c_cc[VEOF] 132 133 #define puts Gputs 134 135 static void defttymode(void); 136 static void dingdong(int); 137 static void dogettytab(void); 138 static int getname(void); 139 static void interrupt(int); 140 static void oflush(void); 141 static void prompt(void); 142 static void putchr(int); 143 static void putf(const char *); 144 static void putpad(const char *); 145 static void puts(const char *); 146 static void timeoverrun(int); 147 static char *getline(int); 148 static void setttymode(int); 149 static int opentty(const char *, int); 150 151 jmp_buf timeout; 152 153 static void 154 dingdong(int signo __unused) 155 { 156 alarm(0); 157 longjmp(timeout, 1); 158 } 159 160 jmp_buf intrupt; 161 162 static void 163 interrupt(int signo __unused) 164 { 165 longjmp(intrupt, 1); 166 } 167 168 /* 169 * Action to take when getty is running too long. 170 */ 171 static void 172 timeoverrun(int signo __unused) 173 { 174 175 syslog(LOG_ERR, "getty exiting due to excessive running time"); 176 exit(1); 177 } 178 179 int 180 main(int argc, char *argv[]) 181 { 182 extern char **environ; 183 int first_sleep = 1, first_time = 1; 184 struct rlimit limit; 185 int rval; 186 187 signal(SIGINT, SIG_IGN); 188 signal(SIGQUIT, SIG_IGN); 189 190 openlog("getty", LOG_CONS|LOG_PID, LOG_AUTH); 191 gethostname(hostname, sizeof(hostname) - 1); 192 hostname[sizeof(hostname) - 1] = '\0'; 193 if (hostname[0] == '\0') 194 strcpy(hostname, "Amnesiac"); 195 196 /* 197 * Limit running time to deal with broken or dead lines. 198 */ 199 (void)signal(SIGXCPU, timeoverrun); 200 limit.rlim_max = RLIM_INFINITY; 201 limit.rlim_cur = GETTY_TIMEOUT; 202 (void)setrlimit(RLIMIT_CPU, &limit); 203 204 gettable("default", defent); 205 gendefaults(); 206 tname = "default"; 207 if (argc > 1) 208 tname = argv[1]; 209 210 /* 211 * The following is a work around for vhangup interactions 212 * which cause great problems getting window systems started. 213 * If the tty line is "-", we do the old style getty presuming 214 * that the file descriptors are already set up for us. 215 * J. Gettys - MIT Project Athena. 216 */ 217 if (argc <= 2 || strcmp(argv[2], "-") == 0) 218 strcpy(ttyn, ttyname(STDIN_FILENO)); 219 else { 220 strcpy(ttyn, dev); 221 strncat(ttyn, argv[2], sizeof(ttyn)-sizeof(dev)); 222 if (strcmp(argv[0], "+") != 0) { 223 chown(ttyn, 0, 0); 224 chmod(ttyn, 0600); 225 revoke(ttyn); 226 227 /* 228 * Do the first scan through gettytab. 229 * Terminal mode parameters will be wrong until 230 * defttymode() called, but they're irrelevant for 231 * the initial setup of the terminal device. 232 */ 233 dogettytab(); 234 235 /* 236 * Init or answer modem sequence has been specified. 237 */ 238 if (IC || AC) { 239 if (!opentty(ttyn, O_RDWR|O_NONBLOCK)) 240 exit(1); 241 defttymode(); 242 setttymode(1); 243 } 244 245 if (IC) { 246 if (getty_chat(IC, CT, DC) > 0) { 247 syslog(LOG_ERR, "modem init problem on %s", ttyn); 248 (void)tcsetattr(STDIN_FILENO, TCSANOW, &tmode); 249 exit(1); 250 } 251 } 252 253 if (AC) { 254 int i, rfds; 255 struct timeval to; 256 257 rfds = 1 << 0; /* FD_SET */ 258 to.tv_sec = RT; 259 to.tv_usec = 0; 260 i = select(32, (fd_set*)&rfds, (fd_set*)NULL, 261 (fd_set*)NULL, RT ? &to : NULL); 262 if (i < 0) { 263 syslog(LOG_ERR, "select %s: %m", ttyn); 264 } else if (i == 0) { 265 syslog(LOG_NOTICE, "recycle tty %s", ttyn); 266 (void)tcsetattr(STDIN_FILENO, TCSANOW, &tmode); 267 exit(0); /* recycle for init */ 268 } 269 i = getty_chat(AC, CT, DC); 270 if (i > 0) { 271 syslog(LOG_ERR, "modem answer problem on %s", ttyn); 272 (void)tcsetattr(STDIN_FILENO, TCSANOW, &tmode); 273 exit(1); 274 } 275 } else { /* maybe blocking open */ 276 if (!opentty(ttyn, O_RDWR | (NC ? O_NONBLOCK : 0 ))) 277 exit(1); 278 } 279 } 280 } 281 282 defttymode(); 283 for (;;) { 284 285 /* 286 * if a delay was specified then sleep for that 287 * number of seconds before writing the initial prompt 288 */ 289 if (first_sleep && DE) { 290 sleep(DE); 291 /* remove any noise */ 292 (void)tcflush(STDIN_FILENO, TCIOFLUSH); 293 } 294 first_sleep = 0; 295 296 setttymode(0); 297 if (AB) { 298 tname = autobaud(); 299 dogettytab(); 300 continue; 301 } 302 if (PS) { 303 tname = portselector(); 304 dogettytab(); 305 continue; 306 } 307 if (CL && *CL) 308 putpad(CL); 309 edithost(HE); 310 311 /* if this is the first time through this, and an 312 issue file has been given, then send it */ 313 if (first_time && IF) { 314 int fd; 315 316 if ((fd = open(IF, O_RDONLY)) != -1) { 317 char * cp; 318 319 while ((cp = getline(fd)) != NULL) { 320 putf(cp); 321 } 322 close(fd); 323 } 324 } 325 first_time = 0; 326 327 if (IM && *IM && !(PL && PP)) 328 putf(IM); 329 if (setjmp(timeout)) { 330 cfsetispeed(&tmode, B0); 331 cfsetospeed(&tmode, B0); 332 (void)tcsetattr(STDIN_FILENO, TCSANOW, &tmode); 333 exit(1); 334 } 335 if (TO) { 336 signal(SIGALRM, dingdong); 337 alarm(TO); 338 } 339 340 rval = 0; 341 if (AL) { 342 const char *p = AL; 343 char *q = name; 344 345 while (*p && q < &name[sizeof name - 1]) { 346 if (isupper(*p)) 347 upper = 1; 348 else if (islower(*p)) 349 lower = 1; 350 else if (isdigit(*p)) 351 digit = 1; 352 *q++ = *p++; 353 } 354 } else if (!(PL && PP)) 355 rval = getname(); 356 if (rval == 2 || (PL && PP)) { 357 oflush(); 358 alarm(0); 359 limit.rlim_max = RLIM_INFINITY; 360 limit.rlim_cur = RLIM_INFINITY; 361 (void)setrlimit(RLIMIT_CPU, &limit); 362 execle(PP, "ppplogin", ttyn, (char *) 0, env); 363 syslog(LOG_ERR, "%s: %m", PP); 364 exit(1); 365 } else if (rval || AL) { 366 int i; 367 368 oflush(); 369 alarm(0); 370 signal(SIGALRM, SIG_DFL); 371 if (name[0] == '\0') 372 continue; 373 if (name[0] == '-') { 374 puts("user names may not start with '-'."); 375 continue; 376 } 377 if (!(upper || lower || digit)) { 378 if (AL) { 379 syslog(LOG_ERR, 380 "invalid auto-login name: %s", AL); 381 exit(1); 382 } else 383 continue; 384 } 385 set_flags(2); 386 if (crmod) { 387 tmode.c_iflag |= ICRNL; 388 tmode.c_oflag |= ONLCR; 389 } 390 #if REALLY_OLD_TTYS 391 if (upper || UC) 392 tmode.sg_flags |= LCASE; 393 if (lower || LC) 394 tmode.sg_flags &= ~LCASE; 395 #endif 396 if (tcsetattr(STDIN_FILENO, TCSANOW, &tmode) < 0) { 397 syslog(LOG_ERR, "tcsetattr %s: %m", ttyn); 398 exit(1); 399 } 400 signal(SIGINT, SIG_DFL); 401 for (i = 0; environ[i] != (char *)0; i++) 402 env[i] = environ[i]; 403 makeenv(&env[i]); 404 405 limit.rlim_max = RLIM_INFINITY; 406 limit.rlim_cur = RLIM_INFINITY; 407 (void)setrlimit(RLIMIT_CPU, &limit); 408 execle(LO, "login", AL ? "-fp" : "-p", name, 409 (char *) 0, env); 410 syslog(LOG_ERR, "%s: %m", LO); 411 exit(1); 412 } 413 alarm(0); 414 signal(SIGALRM, SIG_DFL); 415 signal(SIGINT, SIG_IGN); 416 if (NX && *NX) { 417 tname = NX; 418 dogettytab(); 419 } 420 } 421 } 422 423 static int 424 opentty(const char *tty, int flags) 425 { 426 int i; 427 int failopenlogged = 0; 428 429 while ((i = open(tty, flags)) == -1) 430 { 431 if (!failopenlogged) { 432 syslog(LOG_ERR, "open %s: %m", tty); 433 failopenlogged = 1; 434 } 435 sleep(60); 436 } 437 if (login_tty(i) < 0) { 438 if (daemon(0,0) < 0) { 439 syslog(LOG_ERR,"daemon: %m"); 440 close(i); 441 return 0; 442 } 443 if (login_tty(i) < 0) { 444 syslog(LOG_ERR, "login_tty %s: %m", tty); 445 close(i); 446 return 0; 447 } 448 } 449 return 1; 450 } 451 452 static void 453 defttymode(void) 454 { 455 struct termios def; 456 457 /* Start with default tty settings. */ 458 if (tcgetattr(STDIN_FILENO, &tmode) < 0) { 459 syslog(LOG_ERR, "tcgetattr %s: %m", ttyn); 460 exit(1); 461 } 462 omode = tmode; /* fill c_cc for dogettytab() */ 463 dogettytab(); 464 /* 465 * Don't rely on the driver too much, and initialize crucial 466 * things according to <sys/ttydefaults.h>. Avoid clobbering 467 * the c_cc[] settings however, the console drivers might wish 468 * to leave their idea of the preferred VERASE key value 469 * there. 470 */ 471 cfmakesane(&def); 472 tmode.c_iflag = def.c_iflag; 473 tmode.c_oflag = def.c_oflag; 474 tmode.c_lflag = def.c_lflag; 475 tmode.c_cflag = def.c_cflag; 476 if (NC) 477 tmode.c_cflag |= CLOCAL; 478 omode = tmode; 479 } 480 481 static void 482 setttymode(int raw) 483 { 484 int off = 0; 485 486 (void)tcflush(STDIN_FILENO, TCIOFLUSH); /* clear out the crap */ 487 ioctl(STDIN_FILENO, FIONBIO, &off); /* turn off non-blocking mode */ 488 ioctl(STDIN_FILENO, FIOASYNC, &off); /* ditto for async mode */ 489 490 if (IS) 491 cfsetispeed(&tmode, speed(IS)); 492 else if (SP) 493 cfsetispeed(&tmode, speed(SP)); 494 if (OS) 495 cfsetospeed(&tmode, speed(OS)); 496 else if (SP) 497 cfsetospeed(&tmode, speed(SP)); 498 set_flags(0); 499 setchars(); 500 if (raw) 501 cfmakeraw(&tmode); 502 if (tcsetattr(STDIN_FILENO, TCSANOW, &tmode) < 0) { 503 syslog(LOG_ERR, "tcsetattr %s: %m", ttyn); 504 exit(1); 505 } 506 } 507 508 509 static int 510 getname(void) 511 { 512 int c; 513 char *np; 514 unsigned char cs; 515 int ppp_state = 0; 516 int ppp_connection = 0; 517 518 /* 519 * Interrupt may happen if we use CBREAK mode 520 */ 521 if (setjmp(intrupt)) { 522 signal(SIGINT, SIG_IGN); 523 return (0); 524 } 525 signal(SIGINT, interrupt); 526 set_flags(1); 527 prompt(); 528 oflush(); 529 if (PF > 0) { 530 sleep(PF); 531 PF = 0; 532 } 533 if (tcsetattr(STDIN_FILENO, TCSANOW, &tmode) < 0) { 534 syslog(LOG_ERR, "%s: %m", ttyn); 535 exit(1); 536 } 537 crmod = digit = lower = upper = 0; 538 np = name; 539 for (;;) { 540 oflush(); 541 if (read(STDIN_FILENO, &cs, 1) <= 0) 542 exit(0); 543 if ((c = cs&0177) == 0) 544 return (0); 545 546 /* PPP detection state machine.. 547 Look for sequences: 548 PPP_FRAME, PPP_STATION, PPP_ESCAPE, PPP_CONTROL_ESCAPED or 549 PPP_FRAME, PPP_STATION, PPP_CONTROL (deviant from RFC) 550 See RFC1662. 551 Derived from code from Michael Hancock, <michaelh@cet.co.jp> 552 and Erik 'PPP' Olson, <eriko@wrq.com> 553 */ 554 555 if (PP && (cs == PPP_FRAME)) { 556 ppp_state = 1; 557 } else if (ppp_state == 1 && cs == PPP_STATION) { 558 ppp_state = 2; 559 } else if (ppp_state == 2 && cs == PPP_ESCAPE) { 560 ppp_state = 3; 561 } else if ((ppp_state == 2 && cs == PPP_CONTROL) 562 || (ppp_state == 3 && cs == PPP_CONTROL_ESCAPED)) { 563 ppp_state = 4; 564 } else if (ppp_state == 4 && cs == PPP_LCP_HI) { 565 ppp_state = 5; 566 } else if (ppp_state == 5 && cs == PPP_LCP_LOW) { 567 ppp_connection = 1; 568 break; 569 } else { 570 ppp_state = 0; 571 } 572 573 if (c == EOT || c == CTRL('d')) 574 exit(0); 575 if (c == '\r' || c == '\n' || np >= &name[sizeof name-1]) { 576 putf("\r\n"); 577 break; 578 } 579 if (islower(c)) 580 lower = 1; 581 else if (isupper(c)) 582 upper = 1; 583 else if (c == ERASE || c == '\b' || c == 0177) { 584 if (np > name) { 585 np--; 586 if (cfgetospeed(&tmode) >= 1200) 587 puts("\b \b"); 588 else 589 putchr(cs); 590 } 591 continue; 592 } else if (c == KILL || c == CTRL('u')) { 593 putchr('\r'); 594 if (cfgetospeed(&tmode) < 1200) 595 putchr('\n'); 596 /* this is the way they do it down under ... */ 597 else if (np > name) 598 puts(" \r"); 599 prompt(); 600 digit = lower = upper = 0; 601 np = name; 602 continue; 603 } else if (isdigit(c)) 604 digit = 1; 605 if (IG && (c <= ' ' || c > 0176)) 606 continue; 607 *np++ = c; 608 putchr(cs); 609 } 610 signal(SIGINT, SIG_IGN); 611 *np = 0; 612 if (c == '\r') 613 crmod = 1; 614 if ((upper && !lower && !LC) || UC) 615 for (np = name; *np; np++) 616 if (isupper(*np)) 617 *np = tolower(*np); 618 return (1 + ppp_connection); 619 } 620 621 static void 622 putpad(const char *s) 623 { 624 int pad = 0; 625 speed_t ospeed = cfgetospeed(&tmode); 626 627 if (isdigit(*s)) { 628 while (isdigit(*s)) { 629 pad *= 10; 630 pad += *s++ - '0'; 631 } 632 pad *= 10; 633 if (*s == '.' && isdigit(s[1])) { 634 pad += s[1] - '0'; 635 s += 2; 636 } 637 } 638 639 puts(s); 640 /* 641 * If no delay needed, or output speed is 642 * not comprehensible, then don't try to delay. 643 */ 644 if (pad == 0 || ospeed <= 0) 645 return; 646 647 /* 648 * Round up by a half a character frame, and then do the delay. 649 * Too bad there are no user program accessible programmed delays. 650 * Transmitting pad characters slows many terminals down and also 651 * loads the system. 652 */ 653 pad = (pad * ospeed + 50000) / 100000; 654 while (pad--) 655 putchr(*PC); 656 } 657 658 static void 659 puts(const char *s) 660 { 661 while (*s) 662 putchr(*s++); 663 } 664 665 char outbuf[OBUFSIZ]; 666 int obufcnt = 0; 667 668 static void 669 putchr(int cc) 670 { 671 char c; 672 673 c = cc; 674 if (!NP) { 675 c |= partab[c&0177] & 0200; 676 if (OP) 677 c ^= 0200; 678 } 679 if (!UB) { 680 outbuf[obufcnt++] = c; 681 if (obufcnt >= OBUFSIZ) 682 oflush(); 683 } else 684 write(STDOUT_FILENO, &c, 1); 685 } 686 687 static void 688 oflush(void) 689 { 690 if (obufcnt) 691 write(STDOUT_FILENO, outbuf, obufcnt); 692 obufcnt = 0; 693 } 694 695 static void 696 prompt(void) 697 { 698 699 putf(LM); 700 if (CO) 701 putchr('\n'); 702 } 703 704 705 static char * 706 getline(int fd) 707 { 708 int i = 0; 709 static char linebuf[512]; 710 711 /* 712 * This is certainly slow, but it avoids having to include 713 * stdio.h unnecessarily. Issue files should be small anyway. 714 */ 715 while (i < (sizeof linebuf - 3) && read(fd, linebuf+i, 1)==1) { 716 if (linebuf[i] == '\n') { 717 /* Don't rely on newline mode, assume raw */ 718 linebuf[i++] = '\r'; 719 linebuf[i++] = '\n'; 720 linebuf[i] = '\0'; 721 return linebuf; 722 } 723 ++i; 724 } 725 linebuf[i] = '\0'; 726 return i ? linebuf : 0; 727 } 728 729 static void 730 putf(const char *cp) 731 { 732 extern char editedhost[]; 733 time_t t; 734 char *slash, db[100]; 735 736 static struct utsname kerninfo; 737 738 if (!*kerninfo.sysname) 739 uname(&kerninfo); 740 741 while (*cp) { 742 if (*cp != '%') { 743 putchr(*cp++); 744 continue; 745 } 746 switch (*++cp) { 747 748 case 't': 749 slash = strrchr(ttyn, '/'); 750 if (slash == (char *) 0) 751 puts(ttyn); 752 else 753 puts(&slash[1]); 754 break; 755 756 case 'h': 757 puts(editedhost); 758 break; 759 760 case 'd': { 761 t = (time_t)0; 762 (void)time(&t); 763 if (Lo) 764 (void)setlocale(LC_TIME, Lo); 765 (void)strftime(db, sizeof(db), DF, localtime(&t)); 766 puts(db); 767 break; 768 769 case 's': 770 puts(kerninfo.sysname); 771 break; 772 773 case 'm': 774 puts(kerninfo.machine); 775 break; 776 777 case 'r': 778 puts(kerninfo.release); 779 break; 780 781 case 'v': 782 puts(kerninfo.version); 783 break; 784 } 785 786 case '%': 787 putchr('%'); 788 break; 789 } 790 cp++; 791 } 792 } 793 794 /* 795 * Read a gettytab database entry and perform necessary quirks. 796 */ 797 static void 798 dogettytab(void) 799 { 800 801 /* Read the database entry. */ 802 gettable(tname, tabent); 803 804 /* 805 * Avoid inheriting the parity values from the default entry 806 * if any of them is set in the current entry. 807 * Mixing different parity settings is unreasonable. 808 */ 809 if (OPset || EPset || APset || NPset) 810 OPset = EPset = APset = NPset = 1; 811 812 /* Fill in default values for unset capabilities. */ 813 setdefaults(); 814 } 815