login.c revision 1.27
1 /* $NetBSD: login.c,v 1.27 1997/10/12 12:31:40 mycroft 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 1.27 1997/10/12 12:31:40 mycroft 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 #ifdef KERBEROS5 80 #include <krb5.h> /* Solely for definition of kcontext */ 81 #endif 82 83 #include "pathnames.h" 84 85 void badlogin __P((char *)); 86 void checknologin __P((void)); 87 void dolastlog __P((int)); 88 void getloginname __P((void)); 89 int main __P((int, char *[])); 90 void motd __P((void)); 91 int rootterm __P((char *)); 92 void sigint __P((int)); 93 void sleepexit __P((int)); 94 char *stypeof __P((char *)); 95 void timedout __P((int)); 96 int pwcheck __P((char *, char *, char *, char *)); 97 #if defined(KERBEROS) || defined(KERBEROS5) 98 int klogin __P((struct passwd *, char *, char *, char *)); 99 void kdestroy __P((void)); 100 void dofork __P((void)); 101 #endif 102 103 extern void login __P((struct utmp *)); 104 105 #define TTYGRPNAME "tty" /* name of group to own ttys */ 106 107 /* 108 * This bounds the time given to login. Not a define so it can 109 * be patched on machines where it's too small. 110 */ 111 u_int timeout = 300; 112 113 #if defined(KERBEROS) || defined(KERBEROS5) 114 int notickets = 1; 115 char *instance; 116 char *krbtkfile_env; 117 int authok; 118 #endif 119 #ifdef KERBEROS5 120 extern krb5_context kcontext; 121 #endif 122 123 struct passwd *pwd; 124 int failures; 125 char term[64], *envinit[1], *hostname, *username, *tty; 126 #ifdef SKEY 127 int used_skey = 0; 128 int require_skey = 0; 129 char skeypw[] = "s/key"; 130 #endif 131 132 int 133 main(argc, argv) 134 int argc; 135 char *argv[]; 136 { 137 extern char **environ; 138 struct group *gr; 139 struct stat st; 140 struct timeval tp; 141 struct utmp utmp; 142 int ask, ch, cnt, fflag, hflag, pflag, quietlog, rootlogin, rval; 143 uid_t uid; 144 char *domain, *p, *salt, *ttyn, *pwprompt; 145 char tbuf[MAXPATHLEN + 2], tname[sizeof(_PATH_TTY) + 10]; 146 char localhost[MAXHOSTNAMELEN]; 147 int need_chpass; 148 #ifdef KERBEROS5 149 krb5_error_code kerror; 150 #endif 151 152 tbuf[0] = '\0'; 153 rval = 0; 154 pwprompt = NULL; 155 need_chpass = 0; 156 157 (void)signal(SIGALRM, timedout); 158 (void)alarm(timeout); 159 (void)signal(SIGQUIT, SIG_IGN); 160 (void)signal(SIGINT, SIG_IGN); 161 (void)setpriority(PRIO_PROCESS, 0, 0); 162 163 openlog("login", LOG_ODELAY, LOG_AUTH); 164 165 /* 166 * -p is used by getty to tell login not to destroy the environment 167 * -f is used to skip a second login authentication 168 * -h is used by other servers to pass the name of the remote 169 * host to login so that it may be placed in utmp and wtmp 170 * -s is used to force use of S/Key or equivalent. 171 */ 172 domain = NULL; 173 if (gethostname(localhost, sizeof(localhost)) < 0) 174 syslog(LOG_ERR, "couldn't get local hostname: %m"); 175 else 176 domain = strchr(localhost, '.'); 177 178 fflag = hflag = pflag = 0; 179 uid = getuid(); 180 while ((ch = getopt(argc, argv, "fh:ps")) != -1) 181 switch (ch) { 182 case 'f': 183 fflag = 1; 184 break; 185 case 'h': 186 if (uid) 187 errx(1, "-h option: %s", strerror(EPERM)); 188 hflag = 1; 189 if (domain && (p = strchr(optarg, '.')) != NULL && 190 strcasecmp(p, domain) == 0) 191 *p = 0; 192 hostname = optarg; 193 break; 194 case 'p': 195 pflag = 1; 196 break; 197 case 's': 198 #ifdef SKEY 199 /* 200 * If -s given twice, use S/Key or no login 201 * otherwise just insist on S/Key if user has one. 202 */ 203 require_skey++; 204 #endif 205 break; 206 case '?': 207 default: 208 if (!uid) 209 syslog(LOG_ERR, "invalid flag %c", ch); 210 (void)fprintf(stderr, 211 "usage: login [-fp] [-h hostname] [username]\n"); 212 exit(1); 213 } 214 argc -= optind; 215 argv += optind; 216 217 if (*argv) { 218 username = *argv; 219 ask = 0; 220 } else 221 ask = 1; 222 223 for (cnt = getdtablesize(); cnt > 2; cnt--) 224 (void)close(cnt); 225 226 ttyn = ttyname(STDIN_FILENO); 227 if (ttyn == NULL || *ttyn == '\0') { 228 (void)snprintf(tname, sizeof(tname), "%s??", _PATH_TTY); 229 ttyn = tname; 230 } 231 if ((tty = strrchr(ttyn, '/')) != NULL) 232 ++tty; 233 else 234 tty = ttyn; 235 236 #ifdef KERBEROS5 237 kerror = krb5_init_context(&kcontext); 238 if (kerror) { 239 syslog(LOG_NOTICE, "%s when initializing Kerberos context", 240 error_message(kerror)); 241 exit(1); 242 } 243 #endif KERBEROS5 244 245 for (cnt = 0;; ask = 1) { 246 #ifdef SKEY 247 used_skey = 0; 248 #endif 249 #if defined(KERBEROS) || defined(KERBEROS5) 250 kdestroy(); 251 #endif 252 if (ask) { 253 fflag = 0; 254 getloginname(); 255 } 256 rootlogin = 0; 257 #ifdef KERBEROS 258 if ((instance = strchr(username, '.')) != NULL) { 259 if (strncmp(instance, ".root", 5) == 0) 260 rootlogin = 1; 261 *instance++ = '\0'; 262 } else 263 instance = ""; 264 #endif 265 #ifdef KERBEROS5 266 if ((instance = strchr(username, '/')) != NULL) { 267 if (strncmp(instance, "/root", 5) == 0) 268 rootlogin = 1; 269 *instance++ = '\0'; 270 } else 271 instance = ""; 272 #endif 273 if (strlen(username) > MAXLOGNAME) 274 username[MAXLOGNAME] = '\0'; 275 276 /* 277 * Note if trying multiple user names; log failures for 278 * previous user name, but don't bother logging one failure 279 * for nonexistent name (mistyped username). 280 */ 281 if (failures && strcmp(tbuf, username)) { 282 if (failures > (pwd ? 0 : 1)) 283 badlogin(tbuf); 284 failures = 0; 285 } 286 (void)strncpy(tbuf, username, sizeof(tbuf) - 1); 287 288 if ((pwd = getpwnam(username)) != NULL) 289 salt = pwd->pw_passwd; 290 else 291 salt = "xx"; 292 293 /* 294 * if we have a valid account name, and it doesn't have a 295 * password, or the -f option was specified and the caller 296 * is root or the caller isn't changing their uid, don't 297 * authenticate. 298 */ 299 if (pwd) { 300 if (pwd->pw_uid == 0) 301 rootlogin = 1; 302 303 if (fflag && (uid == 0 || uid == pwd->pw_uid)) { 304 /* already authenticated */ 305 break; 306 } else if (pwd->pw_passwd[0] == '\0') { 307 /* pretend password okay */ 308 rval = 0; 309 goto ttycheck; 310 } 311 } 312 313 fflag = 0; 314 315 (void)setpriority(PRIO_PROCESS, 0, -4); 316 317 p = NULL; 318 pwprompt = "Password:"; 319 320 #ifdef SKEY 321 if (require_skey > 1) /* -s -s */ 322 p = skeypw; 323 else if (skey_haskey(username) == 0) { 324 if (require_skey > 0) /* -s */ 325 p = skeypw; 326 else { 327 static char skprompt[80]; 328 char *skinfo = skey_keyinfo(username); 329 330 (void)snprintf(skprompt, sizeof(skprompt)-1, 331 "Password [%s]:", skinfo); 332 pwprompt = skprompt; 333 } 334 } 335 #endif 336 337 if (p == NULL) 338 p = getpass(pwprompt); 339 340 if (pwd) { 341 #if defined(KERBEROS) || defined(KERBEROS5) 342 rval = klogin(pwd, instance, localhost, p); 343 if (rval != 0 && rootlogin && pwd->pw_uid != 0) 344 rootlogin = 0; 345 if (rval == 0) 346 authok = 1; 347 else if (rval == 1) { 348 if (pwd->pw_uid != 0) 349 rootlogin = 0; 350 rval = pwcheck(username, p, salt, pwd->pw_passwd); 351 } 352 #else 353 rval = pwcheck(username, p, salt, pwd->pw_passwd); 354 #endif 355 } 356 #ifdef SKEY 357 if (used_skey == 0 && p != skeypw) 358 #endif 359 memset(p, 0, strlen(p)); 360 361 (void)setpriority(PRIO_PROCESS, 0, 0); 362 363 ttycheck: 364 /* 365 * If trying to log in as root without Kerberos, 366 * but with insecure terminal, refuse the login attempt. 367 */ 368 #if defined(KERBEROS) || defined(KERBEROS5) 369 if (authok == 0) 370 #endif 371 if (pwd && !rval && rootlogin && !rootterm(tty)) { 372 (void)fprintf(stderr, 373 "%s login refused on this terminal.\n", 374 pwd->pw_name); 375 if (hostname) 376 syslog(LOG_NOTICE, 377 "LOGIN %s REFUSED FROM %s ON TTY %s", 378 pwd->pw_name, hostname, tty); 379 else 380 syslog(LOG_NOTICE, 381 "LOGIN %s REFUSED ON TTY %s", 382 pwd->pw_name, tty); 383 continue; 384 } 385 386 if (pwd && !rval) 387 break; 388 389 (void)printf("Login incorrect\n"); 390 failures++; 391 /* we allow 10 tries, but after 3 we start backing off */ 392 if (++cnt > 3) { 393 if (cnt >= 10) { 394 badlogin(username); 395 sleepexit(1); 396 } 397 sleep((u_int)((cnt - 3) * 5)); 398 } 399 } 400 401 /* committed to login -- turn off timeout */ 402 (void)alarm((u_int)0); 403 404 endpwent(); 405 406 /* if user not super-user, check for disabled logins */ 407 if (!rootlogin) 408 checknologin(); 409 410 if (chdir(pwd->pw_dir) < 0) { 411 (void)printf("No home directory %s!\n", pwd->pw_dir); 412 if (chdir("/")) 413 exit(0); 414 pwd->pw_dir = "/"; 415 (void)printf("Logging in with home = \"/\".\n"); 416 } 417 418 quietlog = access(_PATH_HUSHLOGIN, F_OK) == 0; 419 420 if (pwd->pw_change || pwd->pw_expire) 421 (void)gettimeofday(&tp, (struct timezone *)NULL); 422 if (pwd->pw_change) 423 if (pwd->pw_change == _PASSWORD_CHGNOW) 424 need_chpass = 1; 425 else if (tp.tv_sec >= pwd->pw_change) { 426 (void)printf("Sorry -- your password has expired.\n"); 427 sleepexit(1); 428 } else if (pwd->pw_change - tp.tv_sec < 429 _PASSWORD_WARNDAYS * SECSPERDAY && !quietlog) 430 (void)printf("Warning: your password expires on %s", 431 ctime(&pwd->pw_change)); 432 if (pwd->pw_expire) 433 if (tp.tv_sec >= pwd->pw_expire) { 434 (void)printf("Sorry -- your account has expired.\n"); 435 sleepexit(1); 436 } else if (pwd->pw_expire - tp.tv_sec < 437 _PASSWORD_WARNDAYS * SECSPERDAY && !quietlog) 438 (void)printf("Warning: your account expires on %s", 439 ctime(&pwd->pw_expire)); 440 441 /* Nothing else left to fail -- really log in. */ 442 memset((void *)&utmp, 0, sizeof(utmp)); 443 (void)time(&utmp.ut_time); 444 (void)strncpy(utmp.ut_name, username, sizeof(utmp.ut_name)); 445 if (hostname) 446 (void)strncpy(utmp.ut_host, hostname, sizeof(utmp.ut_host)); 447 (void)strncpy(utmp.ut_line, tty, sizeof(utmp.ut_line)); 448 login(&utmp); 449 450 dolastlog(quietlog); 451 452 (void)chown(ttyn, pwd->pw_uid, 453 (gr = getgrnam(TTYGRPNAME)) ? gr->gr_gid : pwd->pw_gid); 454 455 if (ttyaction(ttyn, "login", pwd->pw_name)) 456 (void)printf("Warning: ttyaction failed.\n"); 457 458 #if defined(KERBEROS) || defined(KERBEROS5) 459 /* Fork so that we can call kdestroy */ 460 if (krbtkfile_env) 461 dofork(); 462 #endif 463 (void)setgid(pwd->pw_gid); 464 465 initgroups(username, pwd->pw_gid); 466 467 if (*pwd->pw_shell == '\0') 468 pwd->pw_shell = _PATH_BSHELL; 469 470 /* Destroy environment unless user has requested its preservation. */ 471 if (!pflag) 472 environ = envinit; 473 (void)setenv("HOME", pwd->pw_dir, 1); 474 (void)setenv("SHELL", pwd->pw_shell, 1); 475 if (term[0] == '\0') 476 (void)strncpy(term, stypeof(tty), sizeof(term)); 477 (void)setenv("TERM", term, 0); 478 (void)setenv("LOGNAME", pwd->pw_name, 1); 479 (void)setenv("USER", pwd->pw_name, 1); 480 (void)setenv("PATH", _PATH_DEFPATH, 0); 481 #ifdef KERBEROS 482 if (krbtkfile_env) 483 (void)setenv("KRBTKFILE", krbtkfile_env, 1); 484 #endif 485 #ifdef KERBEROS5 486 if (krbtkfile_env) 487 (void)setenv("KRB5CCNAME", krbtkfile_env, 1); 488 #endif 489 490 if (tty[sizeof("tty")-1] == 'd') 491 syslog(LOG_INFO, "DIALUP %s, %s", tty, pwd->pw_name); 492 493 /* If fflag is on, assume caller/authenticator has logged root login. */ 494 if (rootlogin && fflag == 0) 495 if (hostname) 496 syslog(LOG_NOTICE, "ROOT LOGIN (%s) ON %s FROM %s", 497 username, tty, hostname); 498 else 499 syslog(LOG_NOTICE, "ROOT LOGIN (%s) ON %s", username, tty); 500 501 #if defined(KERBEROS) || defined(KERBEROS5) 502 if (!quietlog && notickets == 1) 503 (void)printf("Warning: no Kerberos tickets issued.\n"); 504 #endif 505 506 if (!quietlog) { 507 (void)printf("%s\n\t%s %s\n\n", 508 "Copyright (c) 1980, 1983, 1986, 1988, 1990, 1991, 1993, 1994", 509 "The Regents of the University of California. ", 510 "All rights reserved."); 511 motd(); 512 (void)snprintf(tbuf, 513 sizeof(tbuf), "%s/%s", _PATH_MAILDIR, pwd->pw_name); 514 if (stat(tbuf, &st) == 0 && st.st_size != 0) 515 (void)printf("You have %smail.\n", 516 (st.st_mtime > st.st_atime) ? "new " : ""); 517 } 518 519 (void)signal(SIGALRM, SIG_DFL); 520 (void)signal(SIGQUIT, SIG_DFL); 521 (void)signal(SIGINT, SIG_DFL); 522 (void)signal(SIGTSTP, SIG_IGN); 523 524 tbuf[0] = '-'; 525 (void)strncpy(tbuf + 1, (p = strrchr(pwd->pw_shell, '/')) ? 526 p + 1 : pwd->pw_shell, sizeof(tbuf) - 2); 527 528 if (setlogin(pwd->pw_name) < 0) 529 syslog(LOG_ERR, "setlogin() failure: %m"); 530 531 /* Discard permissions last so can't get killed and drop core. */ 532 if (rootlogin) 533 (void)setuid(0); 534 else 535 (void)setuid(pwd->pw_uid); 536 537 /* Wait to change password until we're unprivileged */ 538 if (need_chpass) { 539 #ifdef SKEY 540 /* If the user logged on using S/Key, don't force 541 * a password change 542 */ 543 if (used_skey) { 544 (void)printf( 545 "Warning: your password has expired. Please change it as soon as possible.\n"); 546 } else 547 #endif 548 (void)printf( 549 "Your password has expired. Please choose a new one.\n"); 550 if (system(_PATH_BINPASSWD) != 0) 551 sleepexit(1); 552 } 553 554 execlp(pwd->pw_shell, tbuf, 0); 555 err(1, "%s", pwd->pw_shell); 556 } 557 558 int 559 pwcheck(user, p, salt, passwd) 560 char *user, *p, *salt, *passwd; 561 { 562 int sts = strcmp(crypt(p, salt), passwd); 563 564 #ifdef SKEY 565 if (sts) { /* wasn't passwd */ 566 if (skey_haskey(user)) { 567 if (strcasecmp(p, skeypw) == 0) 568 return 1; 569 } else { 570 if (strcasecmp(p, skeypw) == 0) { 571 sts = skey_authenticate(user); 572 } else { 573 if ((sts = skey_passcheck(user, p)) != -1) { 574 sts = 0; /* ok */ 575 } 576 } 577 } 578 if (sts == 0) 579 used_skey = 1; 580 } 581 #endif 582 return sts; 583 } 584 585 #if defined(KERBEROS) || defined(KERBEROS5) 586 #define NBUFSIZ (MAXLOGNAME + 1 + 5) /* .root suffix */ 587 #else 588 #define NBUFSIZ (MAXLOGNAME + 1) 589 #endif 590 591 #if defined(KERBEROS) || defined(KERBEROS5) 592 /* 593 * This routine handles cleanup stuff, and the like. 594 * It exists only in the child process. 595 */ 596 #include <sys/wait.h> 597 void 598 dofork() 599 { 600 int child; 601 602 if (!(child = fork())) 603 return; /* Child process */ 604 605 /* Setup stuff? This would be things we could do in parallel with login */ 606 (void) chdir("/"); /* Let's not keep the fs busy... */ 607 608 /* If we're the parent, watch the child until it dies */ 609 while (wait(0) != child) 610 ; 611 612 /* Cleanup stuff */ 613 /* Run kdestroy to destroy tickets */ 614 kdestroy(); 615 616 /* Leave */ 617 exit(0); 618 } 619 #endif 620 621 void 622 getloginname() 623 { 624 int ch; 625 char *p; 626 static char nbuf[NBUFSIZ]; 627 628 for (;;) { 629 (void)printf("login: "); 630 for (p = nbuf; (ch = getchar()) != '\n'; ) { 631 if (ch == EOF) { 632 badlogin(username); 633 exit(0); 634 } 635 if (p < nbuf + (NBUFSIZ - 1)) 636 *p++ = ch; 637 } 638 if (p > nbuf) 639 if (nbuf[0] == '-') 640 (void)fprintf(stderr, 641 "login names may not start with '-'.\n"); 642 else { 643 *p = '\0'; 644 username = nbuf; 645 break; 646 } 647 } 648 } 649 650 int 651 rootterm(ttyn) 652 char *ttyn; 653 { 654 struct ttyent *t; 655 656 return ((t = getttynam(ttyn)) && t->ty_status & TTY_SECURE); 657 } 658 659 jmp_buf motdinterrupt; 660 661 void 662 motd() 663 { 664 int fd, nchars; 665 sig_t oldint; 666 char tbuf[8192]; 667 668 if ((fd = open(_PATH_MOTDFILE, O_RDONLY, 0)) < 0) 669 return; 670 oldint = signal(SIGINT, sigint); 671 if (setjmp(motdinterrupt) == 0) 672 while ((nchars = read(fd, tbuf, sizeof(tbuf))) > 0) 673 (void)write(fileno(stdout), tbuf, nchars); 674 (void)signal(SIGINT, oldint); 675 (void)close(fd); 676 } 677 678 /* ARGSUSED */ 679 void 680 sigint(signo) 681 int signo; 682 { 683 longjmp(motdinterrupt, 1); 684 } 685 686 /* ARGSUSED */ 687 void 688 timedout(signo) 689 int signo; 690 { 691 (void)fprintf(stderr, "Login timed out after %d seconds\n", timeout); 692 exit(0); 693 } 694 695 void 696 checknologin() 697 { 698 int fd, nchars; 699 char tbuf[8192]; 700 701 if ((fd = open(_PATH_NOLOGIN, O_RDONLY, 0)) >= 0) { 702 while ((nchars = read(fd, tbuf, sizeof(tbuf))) > 0) 703 (void)write(fileno(stdout), tbuf, nchars); 704 sleepexit(0); 705 } 706 } 707 708 void 709 dolastlog(quiet) 710 int quiet; 711 { 712 struct lastlog ll; 713 int fd; 714 715 if ((fd = open(_PATH_LASTLOG, O_RDWR, 0)) >= 0) { 716 (void)lseek(fd, (off_t)(pwd->pw_uid * sizeof(ll)), SEEK_SET); 717 if (!quiet) { 718 if (read(fd, (char *)&ll, sizeof(ll)) == sizeof(ll) && 719 ll.ll_time != 0) { 720 (void)printf("Last login: %.*s ", 721 24-5, (char *)ctime(&ll.ll_time)); 722 if (*ll.ll_host != '\0') 723 (void)printf("from %.*s\n", 724 (int)sizeof(ll.ll_host), 725 ll.ll_host); 726 else 727 (void)printf("on %.*s\n", 728 (int)sizeof(ll.ll_line), 729 ll.ll_line); 730 } 731 (void)lseek(fd, (off_t)(pwd->pw_uid * sizeof(ll)), 732 SEEK_SET); 733 } 734 memset((void *)&ll, 0, sizeof(ll)); 735 (void)time(&ll.ll_time); 736 (void)strncpy(ll.ll_line, tty, sizeof(ll.ll_line)); 737 if (hostname) 738 (void)strncpy(ll.ll_host, hostname, sizeof(ll.ll_host)); 739 (void)write(fd, (char *)&ll, sizeof(ll)); 740 (void)close(fd); 741 } 742 } 743 744 void 745 badlogin(name) 746 char *name; 747 { 748 if (failures == 0) 749 return; 750 if (hostname) { 751 syslog(LOG_NOTICE, "%d LOGIN FAILURE%s FROM %s", 752 failures, failures > 1 ? "S" : "", hostname); 753 syslog(LOG_AUTHPRIV|LOG_NOTICE, 754 "%d LOGIN FAILURE%s FROM %s, %s", 755 failures, failures > 1 ? "S" : "", hostname, name); 756 } else { 757 syslog(LOG_NOTICE, "%d LOGIN FAILURE%s ON %s", 758 failures, failures > 1 ? "S" : "", tty); 759 syslog(LOG_AUTHPRIV|LOG_NOTICE, 760 "%d LOGIN FAILURE%s ON %s, %s", 761 failures, failures > 1 ? "S" : "", tty, name); 762 } 763 } 764 765 #undef UNKNOWN 766 #define UNKNOWN "su" 767 768 char * 769 stypeof(ttyid) 770 char *ttyid; 771 { 772 struct ttyent *t; 773 774 return (ttyid && (t = getttynam(ttyid)) ? t->ty_type : UNKNOWN); 775 } 776 777 void 778 sleepexit(eval) 779 int eval; 780 { 781 (void)sleep(5); 782 exit(eval); 783 } 784
Indexes created Tue Sep 30 20:09:53 GMT 2025