login.c revision 1.24
1 /* $NetBSD: login.c,v 1.24 1997/08/16 13:50:46 lukem Exp $ */ 2 3 /*- 4 * Copyright (c) 1980, 1987, 1988, 1991, 1993, 1994 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 __COPYRIGHT( 39 "@(#) Copyright (c) 1980, 1987, 1988, 1991, 1993, 1994\n\ 40 The Regents of the University of California. All rights reserved.\n"); 41 #endif /* not lint */ 42 43 #ifndef lint 44 #if 0 45 static char sccsid[] = "@(#)login.c 8.4 (Berkeley) 4/2/94"; 46 #endif 47 __RCSID("$NetBSD: login.c,v 1.24 1997/08/16 13:50:46 lukem Exp $"); 48 #endif /* not lint */ 49 50 /* 51 * login [ name ] 52 * login -h hostname (for telnetd, etc.) 53 * login -f name (for pre-authenticated login: datakit, xterm, etc.) 54 */ 55 56 #include <sys/param.h> 57 #include <sys/stat.h> 58 #include <sys/time.h> 59 #include <sys/resource.h> 60 #include <sys/file.h> 61 62 #include <err.h> 63 #include <errno.h> 64 #include <grp.h> 65 #include <pwd.h> 66 #include <setjmp.h> 67 #include <signal.h> 68 #include <stdio.h> 69 #include <skey.h> 70 #include <stdlib.h> 71 #include <string.h> 72 #include <syslog.h> 73 #include <ttyent.h> 74 #include <tzfile.h> 75 #include <unistd.h> 76 #include <utmp.h> 77 #include <util.h> 78 79 #include "pathnames.h" 80 81 void badlogin __P((char *)); 82 void checknologin __P((void)); 83 void dolastlog __P((int)); 84 void getloginname __P((void)); 85 int main __P((int, char *[])); 86 void motd __P((void)); 87 int rootterm __P((char *)); 88 void sigint __P((int)); 89 void sleepexit __P((int)); 90 char *stypeof __P((char *)); 91 void timedout __P((int)); 92 int pwcheck __P((char *, char *, char *, char *)); 93 #if defined(KERBEROS) || defined(KERBEROS5) 94 int klogin __P((struct passwd *, char *, char *, char *)); 95 void kdestroy __P((void)); 96 void dofork __P((void)); 97 #endif 98 99 extern void login __P((struct utmp *)); 100 101 #define TTYGRPNAME "tty" /* name of group to own ttys */ 102 103 /* 104 * This bounds the time given to login. Not a define so it can 105 * be patched on machines where it's too small. 106 */ 107 u_int timeout = 300; 108 109 #if defined(KERBEROS) || defined(KERBEROS5) 110 int notickets = 1; 111 char *instance; 112 char *krbtkfile_env; 113 int authok; 114 #endif 115 116 struct passwd *pwd; 117 int failures; 118 char term[64], *envinit[1], *hostname, *username, *tty; 119 #ifdef SKEY 120 int used_skey = 0; 121 int require_skey = 0; 122 char skeypw[] = "s/key"; 123 #endif 124 125 int 126 main(argc, argv) 127 int argc; 128 char *argv[]; 129 { 130 extern char **environ; 131 struct group *gr; 132 struct stat st; 133 struct timeval tp; 134 struct utmp utmp; 135 int ask, ch, cnt, fflag, hflag, pflag, quietlog, rootlogin, rval; 136 uid_t uid; 137 char *domain, *p, *salt, *ttyn, *pwprompt; 138 char tbuf[MAXPATHLEN + 2], tname[sizeof(_PATH_TTY) + 10]; 139 char localhost[MAXHOSTNAMELEN]; 140 int need_chpass; 141 142 tbuf[0] = '\0'; 143 rval = 0; 144 pwprompt = NULL; 145 need_chpass = 0; 146 147 (void)signal(SIGALRM, timedout); 148 (void)alarm(timeout); 149 (void)signal(SIGQUIT, SIG_IGN); 150 (void)signal(SIGINT, SIG_IGN); 151 (void)setpriority(PRIO_PROCESS, 0, 0); 152 153 openlog("login", LOG_ODELAY, LOG_AUTH); 154 155 /* 156 * -p is used by getty to tell login not to destroy the environment 157 * -f is used to skip a second login authentication 158 * -h is used by other servers to pass the name of the remote 159 * host to login so that it may be placed in utmp and wtmp 160 * -s is used to force use of S/Key or equivalent. 161 */ 162 domain = NULL; 163 if (gethostname(localhost, sizeof(localhost)) < 0) 164 syslog(LOG_ERR, "couldn't get local hostname: %m"); 165 else 166 domain = strchr(localhost, '.'); 167 168 fflag = hflag = pflag = 0; 169 uid = getuid(); 170 while ((ch = getopt(argc, argv, "fh:ps")) != -1) 171 switch (ch) { 172 case 'f': 173 fflag = 1; 174 break; 175 case 'h': 176 if (uid) 177 errx(1, "-h option: %s", strerror(EPERM)); 178 hflag = 1; 179 if (domain && (p = strchr(optarg, '.')) != NULL && 180 strcasecmp(p, domain) == 0) 181 *p = 0; 182 hostname = optarg; 183 break; 184 case 'p': 185 pflag = 1; 186 break; 187 case 's': 188 #ifdef SKEY 189 /* 190 * If -s given twice, use S/Key or no login 191 * otherwise just insist on S/Key if user has one. 192 */ 193 require_skey++; 194 #endif 195 break; 196 case '?': 197 default: 198 if (!uid) 199 syslog(LOG_ERR, "invalid flag %c", ch); 200 (void)fprintf(stderr, 201 "usage: login [-fp] [-h hostname] [username]\n"); 202 exit(1); 203 } 204 argc -= optind; 205 argv += optind; 206 207 if (*argv) { 208 username = *argv; 209 ask = 0; 210 } else 211 ask = 1; 212 213 for (cnt = getdtablesize(); cnt > 2; cnt--) 214 (void)close(cnt); 215 216 ttyn = ttyname(STDIN_FILENO); 217 if (ttyn == NULL || *ttyn == '\0') { 218 (void)snprintf(tname, sizeof(tname), "%s??", _PATH_TTY); 219 ttyn = tname; 220 } 221 if ((tty = strrchr(ttyn, '/')) != NULL) 222 ++tty; 223 else 224 tty = ttyn; 225 226 for (cnt = 0;; ask = 1) { 227 #ifdef SKEY 228 used_skey = 0; 229 #endif 230 #if defined(KERBEROS) || defined(KERBEROS5) 231 kdestroy(); 232 #endif 233 if (ask) { 234 fflag = 0; 235 getloginname(); 236 } 237 rootlogin = 0; 238 #ifdef KERBEROS 239 if ((instance = strchr(username, '.')) != NULL) { 240 if (strncmp(instance, ".root", 5) == 0) 241 rootlogin = 1; 242 *instance++ = '\0'; 243 } else 244 instance = ""; 245 #endif 246 #ifdef KERBEROS5 247 if ((instance = strchr(username, '/')) != NULL) { 248 if (strncmp(instance, "/root", 5) == 0) 249 rootlogin = 1; 250 *instance++ = '\0'; 251 } else 252 instance = ""; 253 #endif 254 if (strlen(username) > MAXLOGNAME) 255 username[MAXLOGNAME] = '\0'; 256 257 /* 258 * Note if trying multiple user names; log failures for 259 * previous user name, but don't bother logging one failure 260 * for nonexistent name (mistyped username). 261 */ 262 if (failures && strcmp(tbuf, username)) { 263 if (failures > (pwd ? 0 : 1)) 264 badlogin(tbuf); 265 failures = 0; 266 } 267 (void)strncpy(tbuf, username, sizeof(tbuf) - 1); 268 269 if ((pwd = getpwnam(username)) != NULL) 270 salt = pwd->pw_passwd; 271 else 272 salt = "xx"; 273 274 /* 275 * if we have a valid account name, and it doesn't have a 276 * password, or the -f option was specified and the caller 277 * is root or the caller isn't changing their uid, don't 278 * authenticate. 279 */ 280 if (pwd) { 281 if (pwd->pw_uid == 0) 282 rootlogin = 1; 283 284 if (fflag && (uid == 0 || uid == pwd->pw_uid)) { 285 /* already authenticated */ 286 break; 287 } else if (pwd->pw_passwd[0] == '\0') { 288 /* pretend password okay */ 289 rval = 0; 290 goto ttycheck; 291 } 292 } 293 294 fflag = 0; 295 296 (void)setpriority(PRIO_PROCESS, 0, -4); 297 298 #ifdef SKEY 299 p = NULL; 300 pwprompt = "Password:"; 301 302 if (require_skey > 1) /* -s -s */ 303 p = skeypw; 304 else if (skey_haskey(username) == 0) { 305 if (require_skey > 0) /* -s */ 306 p = skeypw; 307 else { 308 static char skprompt[80]; 309 char *skinfo = skey_keyinfo(username); 310 311 (void)snprintf(skprompt, sizeof(skprompt)-1, 312 "Password [%s]:", skinfo); 313 pwprompt = skprompt; 314 } 315 } 316 if (p == NULL) 317 #endif 318 p = getpass(pwprompt); 319 320 if (pwd) { 321 #if defined(KERBEROS) || defined(KERBEROS5) 322 rval = klogin(pwd, instance, localhost, p); 323 if (rval != 0 && rootlogin && pwd->pw_uid != 0) 324 rootlogin = 0; 325 if (rval == 0) 326 authok = 1; 327 else if (rval == 1) { 328 if (pwd->pw_uid != 0) 329 rootlogin = 0; 330 rval = pwcheck(username, p, salt, pwd->pw_passwd); 331 } 332 #else 333 rval = pwcheck(username, p, salt, pwd->pw_passwd); 334 #endif 335 } 336 #ifdef SKEY 337 if (used_skey == 0 && p != skeypw) 338 #endif 339 memset(p, 0, strlen(p)); 340 341 (void)setpriority(PRIO_PROCESS, 0, 0); 342 343 ttycheck: 344 /* 345 * If trying to log in as root without Kerberos, 346 * but with insecure terminal, refuse the login attempt. 347 */ 348 #if defined(KERBEROS) || defined(KERBEROS5) 349 if (authok == 0) 350 #endif 351 if (pwd && !rval && rootlogin && !rootterm(tty)) { 352 (void)fprintf(stderr, 353 "%s login refused on this terminal.\n", 354 pwd->pw_name); 355 if (hostname) 356 syslog(LOG_NOTICE, 357 "LOGIN %s REFUSED FROM %s ON TTY %s", 358 pwd->pw_name, hostname, tty); 359 else 360 syslog(LOG_NOTICE, 361 "LOGIN %s REFUSED ON TTY %s", 362 pwd->pw_name, tty); 363 continue; 364 } 365 366 if (pwd && !rval) 367 break; 368 369 (void)printf("Login incorrect\n"); 370 failures++; 371 /* we allow 10 tries, but after 3 we start backing off */ 372 if (++cnt > 3) { 373 if (cnt >= 10) { 374 badlogin(username); 375 sleepexit(1); 376 } 377 sleep((u_int)((cnt - 3) * 5)); 378 } 379 } 380 381 /* committed to login -- turn off timeout */ 382 (void)alarm((u_int)0); 383 384 endpwent(); 385 386 /* if user not super-user, check for disabled logins */ 387 if (!rootlogin) 388 checknologin(); 389 390 if (chdir(pwd->pw_dir) < 0) { 391 (void)printf("No home directory %s!\n", pwd->pw_dir); 392 if (chdir("/")) 393 exit(0); 394 pwd->pw_dir = "/"; 395 (void)printf("Logging in with home = \"/\".\n"); 396 } 397 398 quietlog = access(_PATH_HUSHLOGIN, F_OK) == 0; 399 400 if (pwd->pw_change || pwd->pw_expire) 401 (void)gettimeofday(&tp, (struct timezone *)NULL); 402 if (pwd->pw_change) 403 if (pwd->pw_change == _PASSWORD_CHGNOW) 404 need_chpass = 1; 405 else if (tp.tv_sec >= pwd->pw_change) { 406 (void)printf("Sorry -- your password has expired.\n"); 407 sleepexit(1); 408 } else if (pwd->pw_change - tp.tv_sec < 409 _PASSWORD_WARNDAYS * SECSPERDAY && !quietlog) 410 (void)printf("Warning: your password expires on %s", 411 ctime(&pwd->pw_change)); 412 if (pwd->pw_expire) 413 if (tp.tv_sec >= pwd->pw_expire) { 414 (void)printf("Sorry -- your account has expired.\n"); 415 sleepexit(1); 416 } else if (pwd->pw_expire - tp.tv_sec < 417 _PASSWORD_WARNDAYS * SECSPERDAY && !quietlog) 418 (void)printf("Warning: your account expires on %s", 419 ctime(&pwd->pw_expire)); 420 421 /* Nothing else left to fail -- really log in. */ 422 memset((void *)&utmp, 0, sizeof(utmp)); 423 (void)time(&utmp.ut_time); 424 (void)strncpy(utmp.ut_name, username, sizeof(utmp.ut_name)); 425 if (hostname) 426 (void)strncpy(utmp.ut_host, hostname, sizeof(utmp.ut_host)); 427 (void)strncpy(utmp.ut_line, tty, sizeof(utmp.ut_line)); 428 login(&utmp); 429 430 dolastlog(quietlog); 431 432 (void)chown(ttyn, pwd->pw_uid, 433 (gr = getgrnam(TTYGRPNAME)) ? gr->gr_gid : pwd->pw_gid); 434 435 if (ttyaction(ttyn, "login", pwd->pw_name)) 436 (void)printf("Warning: ttyaction failed.\n"); 437 438 #if defined(KERBEROS) || defined(KERBEROS5) 439 /* Fork so that we can call kdestroy */ 440 if (krbtkfile_env) 441 dofork(); 442 #endif 443 (void)setgid(pwd->pw_gid); 444 445 initgroups(username, pwd->pw_gid); 446 447 if (*pwd->pw_shell == '\0') 448 pwd->pw_shell = _PATH_BSHELL; 449 450 /* Destroy environment unless user has requested its preservation. */ 451 if (!pflag) 452 environ = envinit; 453 (void)setenv("HOME", pwd->pw_dir, 1); 454 (void)setenv("SHELL", pwd->pw_shell, 1); 455 if (term[0] == '\0') 456 (void)strncpy(term, stypeof(tty), sizeof(term)); 457 (void)setenv("TERM", term, 0); 458 (void)setenv("LOGNAME", pwd->pw_name, 1); 459 (void)setenv("USER", pwd->pw_name, 1); 460 (void)setenv("PATH", _PATH_DEFPATH, 0); 461 #ifdef KERBEROS 462 if (krbtkfile_env) 463 (void)setenv("KRBTKFILE", krbtkfile_env, 1); 464 #endif 465 #ifdef KERBEROS5 466 if (krbtkfile_env) 467 (void)setenv("KRB5CCNAME", krbtkfile_env, 1); 468 #endif 469 470 if (tty[sizeof("tty")-1] == 'd') 471 syslog(LOG_INFO, "DIALUP %s, %s", tty, pwd->pw_name); 472 473 /* If fflag is on, assume caller/authenticator has logged root login. */ 474 if (rootlogin && fflag == 0) 475 if (hostname) 476 syslog(LOG_NOTICE, "ROOT LOGIN (%s) ON %s FROM %s", 477 username, tty, hostname); 478 else 479 syslog(LOG_NOTICE, "ROOT LOGIN (%s) ON %s", username, tty); 480 481 #if defined(KERBEROS) || defined(KERBEROS5) 482 if (!quietlog && notickets == 1) 483 (void)printf("Warning: no Kerberos tickets issued.\n"); 484 #endif 485 486 if (!quietlog) { 487 (void)printf("%s\n\t%s %s\n\n", 488 "Copyright (c) 1980, 1983, 1986, 1988, 1990, 1991, 1993, 1994", 489 "The Regents of the University of California. ", 490 "All rights reserved."); 491 motd(); 492 (void)snprintf(tbuf, 493 sizeof(tbuf), "%s/%s", _PATH_MAILDIR, pwd->pw_name); 494 if (stat(tbuf, &st) == 0 && st.st_size != 0) 495 (void)printf("You have %smail.\n", 496 (st.st_mtime > st.st_atime) ? "new " : ""); 497 } 498 499 (void)signal(SIGALRM, SIG_DFL); 500 (void)signal(SIGQUIT, SIG_DFL); 501 (void)signal(SIGINT, SIG_DFL); 502 (void)signal(SIGTSTP, SIG_IGN); 503 504 tbuf[0] = '-'; 505 (void)strncpy(tbuf + 1, (p = strrchr(pwd->pw_shell, '/')) ? 506 p + 1 : pwd->pw_shell, sizeof(tbuf) - 2); 507 508 if (setlogin(pwd->pw_name) < 0) 509 syslog(LOG_ERR, "setlogin() failure: %m"); 510 511 /* Discard permissions last so can't get killed and drop core. */ 512 if (rootlogin) 513 (void)setuid(0); 514 else 515 (void)setuid(pwd->pw_uid); 516 517 /* Wait to change password until we're unprivileged */ 518 if (need_chpass) { 519 #ifdef SKEY 520 /* If the user logged on using S/Key, don't force 521 * a password change 522 */ 523 if (used_skey) { 524 (void)printf( 525 "Warning: your password has expired. Please change it as soon as possible.\n"); 526 } else 527 #endif 528 (void)printf( 529 "Your password has expired. Please choose a new one.\n"); 530 if (system(_PATH_BINPASSWD) != 0) 531 sleepexit(1); 532 } 533 534 execlp(pwd->pw_shell, tbuf, 0); 535 err(1, "%s", pwd->pw_shell); 536 } 537 538 int 539 pwcheck(user, p, salt, passwd) 540 char *user, *p, *salt, *passwd; 541 { 542 int sts = strcmp(crypt(p, salt), passwd); 543 544 #ifdef SKEY 545 if (sts) { /* wasn't passwd */ 546 if (skey_haskey(user)) { 547 if (strcasecmp(p, skeypw) == 0) 548 return 1; 549 } else { 550 if (strcasecmp(p, skeypw) == 0) { 551 sts = skey_authenticate(user); 552 } else { 553 if ((sts = skey_passcheck(user, p)) != -1) { 554 sts = 0; /* ok */ 555 } 556 } 557 } 558 if (sts == 0) 559 used_skey = 1; 560 } 561 #endif 562 return sts; 563 } 564 565 #if defined(KERBEROS) || defined(KERBEROS5) 566 #define NBUFSIZ (MAXLOGNAME + 1 + 5) /* .root suffix */ 567 #else 568 #define NBUFSIZ (MAXLOGNAME + 1) 569 #endif 570 571 #if defined(KERBEROS) || defined(KERBEROS5) 572 /* 573 * This routine handles cleanup stuff, and the like. 574 * It exists only in the child process. 575 */ 576 #include <sys/wait.h> 577 void 578 dofork() 579 { 580 int child; 581 582 if (!(child = fork())) 583 return; /* Child process */ 584 585 /* Setup stuff? This would be things we could do in parallel with login */ 586 (void) chdir("/"); /* Let's not keep the fs busy... */ 587 588 /* If we're the parent, watch the child until it dies */ 589 while (wait(0) != child) 590 ; 591 592 /* Cleanup stuff */ 593 /* Run kdestroy to destroy tickets */ 594 kdestroy(); 595 596 /* Leave */ 597 exit(0); 598 } 599 #endif 600 601 void 602 getloginname() 603 { 604 int ch; 605 char *p; 606 static char nbuf[NBUFSIZ]; 607 608 for (;;) { 609 (void)printf("login: "); 610 for (p = nbuf; (ch = getchar()) != '\n'; ) { 611 if (ch == EOF) { 612 badlogin(username); 613 exit(0); 614 } 615 if (p < nbuf + (NBUFSIZ - 1)) 616 *p++ = ch; 617 } 618 if (p > nbuf) 619 if (nbuf[0] == '-') 620 (void)fprintf(stderr, 621 "login names may not start with '-'.\n"); 622 else { 623 *p = '\0'; 624 username = nbuf; 625 break; 626 } 627 } 628 } 629 630 int 631 rootterm(ttyn) 632 char *ttyn; 633 { 634 struct ttyent *t; 635 636 return ((t = getttynam(ttyn)) && t->ty_status & TTY_SECURE); 637 } 638 639 jmp_buf motdinterrupt; 640 641 void 642 motd() 643 { 644 int fd, nchars; 645 sig_t oldint; 646 char tbuf[8192]; 647 648 if ((fd = open(_PATH_MOTDFILE, O_RDONLY, 0)) < 0) 649 return; 650 oldint = signal(SIGINT, sigint); 651 if (setjmp(motdinterrupt) == 0) 652 while ((nchars = read(fd, tbuf, sizeof(tbuf))) > 0) 653 (void)write(fileno(stdout), tbuf, nchars); 654 (void)signal(SIGINT, oldint); 655 (void)close(fd); 656 } 657 658 /* ARGSUSED */ 659 void 660 sigint(signo) 661 int signo; 662 { 663 longjmp(motdinterrupt, 1); 664 } 665 666 /* ARGSUSED */ 667 void 668 timedout(signo) 669 int signo; 670 { 671 (void)fprintf(stderr, "Login timed out after %d seconds\n", timeout); 672 exit(0); 673 } 674 675 void 676 checknologin() 677 { 678 int fd, nchars; 679 char tbuf[8192]; 680 681 if ((fd = open(_PATH_NOLOGIN, O_RDONLY, 0)) >= 0) { 682 while ((nchars = read(fd, tbuf, sizeof(tbuf))) > 0) 683 (void)write(fileno(stdout), tbuf, nchars); 684 sleepexit(0); 685 } 686 } 687 688 void 689 dolastlog(quiet) 690 int quiet; 691 { 692 struct lastlog ll; 693 int fd; 694 695 if ((fd = open(_PATH_LASTLOG, O_RDWR, 0)) >= 0) { 696 (void)lseek(fd, (off_t)pwd->pw_uid * sizeof(ll), L_SET); 697 if (!quiet) { 698 if (read(fd, (char *)&ll, sizeof(ll)) == sizeof(ll) && 699 ll.ll_time != 0) { 700 (void)printf("Last login: %.*s ", 701 24-5, (char *)ctime(&ll.ll_time)); 702 if (*ll.ll_host != '\0') 703 (void)printf("from %.*s\n", 704 (int)sizeof(ll.ll_host), 705 ll.ll_host); 706 else 707 (void)printf("on %.*s\n", 708 (int)sizeof(ll.ll_line), 709 ll.ll_line); 710 } 711 (void)lseek(fd, (off_t)pwd->pw_uid * sizeof(ll), L_SET); 712 } 713 memset((void *)&ll, 0, sizeof(ll)); 714 (void)time(&ll.ll_time); 715 (void)strncpy(ll.ll_line, tty, sizeof(ll.ll_line)); 716 if (hostname) 717 (void)strncpy(ll.ll_host, hostname, sizeof(ll.ll_host)); 718 (void)write(fd, (char *)&ll, sizeof(ll)); 719 (void)close(fd); 720 } 721 } 722 723 void 724 badlogin(name) 725 char *name; 726 { 727 if (failures == 0) 728 return; 729 if (hostname) { 730 syslog(LOG_NOTICE, "%d LOGIN FAILURE%s FROM %s", 731 failures, failures > 1 ? "S" : "", hostname); 732 syslog(LOG_AUTHPRIV|LOG_NOTICE, 733 "%d LOGIN FAILURE%s FROM %s, %s", 734 failures, failures > 1 ? "S" : "", hostname, name); 735 } else { 736 syslog(LOG_NOTICE, "%d LOGIN FAILURE%s ON %s", 737 failures, failures > 1 ? "S" : "", tty); 738 syslog(LOG_AUTHPRIV|LOG_NOTICE, 739 "%d LOGIN FAILURE%s ON %s, %s", 740 failures, failures > 1 ? "S" : "", tty, name); 741 } 742 } 743 744 #undef UNKNOWN 745 #define UNKNOWN "su" 746 747 char * 748 stypeof(ttyid) 749 char *ttyid; 750 { 751 struct ttyent *t; 752 753 return (ttyid && (t = getttynam(ttyid)) ? t->ty_type : UNKNOWN); 754 } 755 756 void 757 sleepexit(eval) 758 int eval; 759 { 760 (void)sleep(5); 761 exit(eval); 762 } 763
Indexes created Tue Sep 30 20:09:53 GMT 2025