Annotation of src/usr.bin/login/login.c, Revision 1.18
1.18 ! flipk 1: /* $OpenBSD: login.c,v 1.17 1997/01/27 20:44:14 dm Exp $ */
1.3 deraadt 2: /* $NetBSD: login.c,v 1.13 1996/05/15 23:50:16 jtc Exp $ */
1.1 deraadt 3:
4: /*-
5: * Copyright (c) 1980, 1987, 1988, 1991, 1993, 1994
6: * The Regents of the University of California. All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: * 3. All advertising materials mentioning features or use of this software
17: * must display the following acknowledgement:
18: * This product includes software developed by the University of
19: * California, Berkeley and its contributors.
20: * 4. Neither the name of the University nor the names of its contributors
21: * may be used to endorse or promote products derived from this software
22: * without specific prior written permission.
23: *
24: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34: * SUCH DAMAGE.
35: */
36:
37: #ifndef lint
38: static char 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
1.18 ! flipk 47: static char rcsid[] = "$OpenBSD: login.c,v 1.17 1997/01/27 20:44:14 dm Exp $";
1.1 deraadt 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>
1.11 millert 61: #include <sys/wait.h>
1.1 deraadt 62:
63: #include <err.h>
64: #include <errno.h>
65: #include <grp.h>
66: #include <pwd.h>
67: #include <setjmp.h>
68: #include <signal.h>
69: #include <stdio.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>
1.3 deraadt 77: #include <util.h>
1.1 deraadt 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: void motd __P((void));
86: int rootterm __P((char *));
87: void sigint __P((int));
1.11 millert 88: void sighup __P((int));
1.1 deraadt 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 *));
1.13 millert 100: extern int check_failedlogin __P((uid_t));
1.14 millert 101: extern void log_failedlogin __P((uid_t, char *, char *, char *));
1.1 deraadt 102:
103: #define TTYGRPNAME "tty" /* name of group to own ttys */
104:
105: /*
106: * This bounds the time given to login. Not a define so it can
107: * be patched on machines where it's too small.
108: */
109: u_int timeout = 300;
110:
111: #if defined(KERBEROS) || defined(KERBEROS5)
112: int notickets = 1;
113: char *instance;
114: char *krbtkfile_env;
115: int authok;
116: #endif
117:
118: struct passwd *pwd;
119: int failures;
1.14 millert 120: char term[64], *envinit[1], *hostname, *tty;
121: char *username = NULL, *rusername = NULL;
1.1 deraadt 122:
123: int
124: main(argc, argv)
125: int argc;
126: char *argv[];
127: {
128: extern char **environ;
129: struct group *gr;
130: struct stat st;
131: struct timeval tp;
132: struct utmp utmp;
1.14 millert 133: int ask, ch, cnt, fflag, hflag, pflag, uflag, quietlog, rootlogin, rval;
1.1 deraadt 134: uid_t uid;
135: char *domain, *p, *salt, *ttyn;
136: char tbuf[MAXPATHLEN + 2], tname[sizeof(_PATH_TTY) + 10];
137: char localhost[MAXHOSTNAMELEN];
138:
139: (void)signal(SIGALRM, timedout);
140: (void)alarm(timeout);
141: (void)signal(SIGQUIT, SIG_IGN);
142: (void)signal(SIGINT, SIG_IGN);
1.11 millert 143: (void)signal(SIGHUP, sighup);
1.1 deraadt 144: (void)setpriority(PRIO_PROCESS, 0, 0);
145:
146: openlog("login", LOG_ODELAY, LOG_AUTH);
147:
148: /*
149: * -p is used by getty to tell login not to destroy the environment
150: * -f is used to skip a second login authentication
151: * -h is used by other servers to pass the name of the remote
152: * host to login so that it may be placed in utmp and wtmp
153: */
154: domain = NULL;
155: if (gethostname(localhost, sizeof(localhost)) < 0)
156: syslog(LOG_ERR, "couldn't get local hostname: %m");
157: else
158: domain = strchr(localhost, '.');
159:
160: fflag = hflag = pflag = 0;
161: uid = getuid();
1.16 millert 162: while ((ch = getopt(argc, argv, "fh:u:p")) != -1)
1.1 deraadt 163: switch (ch) {
164: case 'f':
165: fflag = 1;
166: break;
167: case 'h':
168: if (uid)
169: errx(1, "-h option: %s", strerror(EPERM));
170: hflag = 1;
171: if (domain && (p = strchr(optarg, '.')) &&
172: strcasecmp(p, domain) == 0)
173: *p = 0;
174: hostname = optarg;
175: break;
176: case 'p':
177: pflag = 1;
178: break;
1.14 millert 179: case 'u':
180: if (uid)
181: errx(1, "-u option: %s", strerror(EPERM));
182: uflag = 1;
183: rusername = optarg;
184: break;
1.1 deraadt 185: case '?':
186: default:
187: if (!uid)
188: syslog(LOG_ERR, "invalid flag %c", ch);
189: (void)fprintf(stderr,
190: "usage: login [-fp] [-h hostname] [username]\n");
191: exit(1);
192: }
193: argc -= optind;
194: argv += optind;
195:
196: if (*argv) {
197: username = *argv;
198: ask = 0;
199: } else
200: ask = 1;
201:
202: for (cnt = getdtablesize(); cnt > 2; cnt--)
203: (void)close(cnt);
204:
205: ttyn = ttyname(STDIN_FILENO);
206: if (ttyn == NULL || *ttyn == '\0') {
207: (void)snprintf(tname, sizeof(tname), "%s??", _PATH_TTY);
208: ttyn = tname;
209: }
1.12 millert 210: if ((tty = strrchr(ttyn, '/')))
1.1 deraadt 211: ++tty;
212: else
213: tty = ttyn;
214:
215: for (cnt = 0;; ask = 1) {
216: #if defined(KERBEROS) || defined(KERBEROS5)
217: kdestroy();
218: #endif
219: if (ask) {
220: fflag = 0;
221: getloginname();
222: }
223: rootlogin = 0;
1.18 ! flipk 224:
! 225: #if defined(KERBEROS) || defined(KERBEROS5)
! 226: /*
! 227: * Why should anyone with a root instance be able
! 228: * to be root here?
! 229: */
1.17 dm 230: instance = "";
1.18 ! flipk 231: #endif
1.1 deraadt 232: #ifdef KERBEROS
233: if ((instance = strchr(username, '.')) != NULL) {
234: if (strncmp(instance, ".root", 5) == 0)
235: rootlogin = 1;
236: *instance++ = '\0';
237: } else
238: instance = "";
239: #endif
240: #ifdef KERBEROS5
241: if ((instance = strchr(username, '/')) != NULL) {
242: if (strncmp(instance, "/root", 5) == 0)
243: rootlogin = 1;
244: *instance++ = '\0';
245: } else
246: instance = "";
247: #endif
248: if (strlen(username) > UT_NAMESIZE)
249: username[UT_NAMESIZE] = '\0';
250:
251: /*
252: * Note if trying multiple user names; log failures for
253: * previous user name, but don't bother logging one failure
254: * for nonexistent name (mistyped username).
255: */
256: if (failures && strcmp(tbuf, username)) {
257: if (failures > (pwd ? 0 : 1))
258: badlogin(tbuf);
259: failures = 0;
260: }
261: (void)strcpy(tbuf, username);
262:
1.12 millert 263: if ((pwd = getpwnam(username)))
1.1 deraadt 264: salt = pwd->pw_passwd;
265: else
266: salt = "xx";
267:
268: /*
269: * if we have a valid account name, and it doesn't have a
270: * password, or the -f option was specified and the caller
271: * is root or the caller isn't changing their uid, don't
272: * authenticate.
273: */
274: if (pwd) {
275: if (pwd->pw_uid == 0)
276: rootlogin = 1;
277:
278: if (fflag && (uid == 0 || uid == pwd->pw_uid)) {
279: /* already authenticated */
280: break;
281: } else if (pwd->pw_passwd[0] == '\0') {
282: /* pretend password okay */
283: rval = 0;
284: goto ttycheck;
285: }
286: }
287:
288: fflag = 0;
289:
290: (void)setpriority(PRIO_PROCESS, 0, -4);
291:
292: p = getpass("Password:");
293:
294: if (pwd) {
295: #if defined(KERBEROS) || defined(KERBEROS5)
296: rval = klogin(pwd, instance, localhost, p);
297: if (rval != 0 && rootlogin && pwd->pw_uid != 0)
298: rootlogin = 0;
299: if (rval == 0)
300: authok = 1;
301: else if (rval == 1) {
302: if (pwd->pw_uid != 0)
303: rootlogin = 0;
304: rval = pwcheck(username, p, salt, pwd->pw_passwd);
305: }
306: #else
307: rval = pwcheck(username, p, salt, pwd->pw_passwd);
308: #endif
309: }
310: memset(p, 0, strlen(p));
311:
312: (void)setpriority(PRIO_PROCESS, 0, 0);
313:
314: ttycheck:
315: /*
316: * If trying to log in as root without Kerberos,
317: * but with insecure terminal, refuse the login attempt.
318: */
319: #if defined(KERBEROS) || defined(KERBEROS5)
320: if (authok == 0)
321: #endif
322: if (pwd && !rval && rootlogin && !rootterm(tty)) {
323: (void)fprintf(stderr,
324: "%s login refused on this terminal.\n",
325: pwd->pw_name);
326: if (hostname)
327: syslog(LOG_NOTICE,
1.14 millert 328: "LOGIN %s REFUSED FROM %s%s%s ON TTY %s",
329: pwd->pw_name, rusername ? rusername : "",
330: rusername ? "@" : "", hostname, tty);
1.1 deraadt 331: else
332: syslog(LOG_NOTICE,
333: "LOGIN %s REFUSED ON TTY %s",
334: pwd->pw_name, tty);
335: continue;
336: }
337:
338: if (pwd && !rval)
339: break;
340:
341: (void)printf("Login incorrect\n");
342: failures++;
1.13 millert 343: if (pwd)
1.14 millert 344: log_failedlogin(pwd->pw_uid, hostname, rusername, tty);
1.1 deraadt 345: /* we allow 10 tries, but after 3 we start backing off */
346: if (++cnt > 3) {
347: if (cnt >= 10) {
348: badlogin(username);
349: sleepexit(1);
350: }
351: sleep((u_int)((cnt - 3) * 5));
352: }
353: }
354:
355: /* committed to login -- turn off timeout */
356: (void)alarm((u_int)0);
357:
358: endpwent();
359:
360: /* if user not super-user, check for disabled logins */
361: if (!rootlogin)
362: checknologin();
363:
1.5 deraadt 364: setegid(pwd->pw_gid);
365: seteuid(pwd->pw_uid);
366:
1.1 deraadt 367: if (chdir(pwd->pw_dir) < 0) {
368: (void)printf("No home directory %s!\n", pwd->pw_dir);
369: if (chdir("/"))
370: exit(0);
371: pwd->pw_dir = "/";
372: (void)printf("Logging in with home = \"/\".\n");
373: }
374:
375: quietlog = access(_PATH_HUSHLOGIN, F_OK) == 0;
1.5 deraadt 376:
377: seteuid(0);
378: setegid(0); /* XXX use a saved gid instead? */
1.1 deraadt 379:
380: if (pwd->pw_change || pwd->pw_expire)
381: (void)gettimeofday(&tp, (struct timezone *)NULL);
382: if (pwd->pw_change)
383: if (tp.tv_sec >= pwd->pw_change) {
384: (void)printf("Sorry -- your password has expired.\n");
385: sleepexit(1);
386: } else if (pwd->pw_change - tp.tv_sec <
387: 2 * DAYSPERWEEK * SECSPERDAY && !quietlog)
388: (void)printf("Warning: your password expires on %s",
389: ctime(&pwd->pw_change));
390: if (pwd->pw_expire)
391: if (tp.tv_sec >= pwd->pw_expire) {
392: (void)printf("Sorry -- your account has expired.\n");
393: sleepexit(1);
394: } else if (pwd->pw_expire - tp.tv_sec <
395: 2 * DAYSPERWEEK * SECSPERDAY && !quietlog)
396: (void)printf("Warning: your account expires on %s",
397: ctime(&pwd->pw_expire));
398:
399: /* Nothing else left to fail -- really log in. */
1.11 millert 400: (void)signal(SIGHUP, SIG_DFL);
1.1 deraadt 401: memset((void *)&utmp, 0, sizeof(utmp));
402: (void)time(&utmp.ut_time);
403: (void)strncpy(utmp.ut_name, username, sizeof(utmp.ut_name));
404: if (hostname)
405: (void)strncpy(utmp.ut_host, hostname, sizeof(utmp.ut_host));
406: (void)strncpy(utmp.ut_line, tty, sizeof(utmp.ut_line));
407: login(&utmp);
408:
1.13 millert 409: if (!quietlog)
410: (void)check_failedlogin(pwd->pw_uid);
1.1 deraadt 411: dolastlog(quietlog);
1.6 deraadt 412:
413: login_fbtab(tty, pwd->pw_uid, pwd->pw_gid);
1.1 deraadt 414:
415: (void)chown(ttyn, pwd->pw_uid,
416: (gr = getgrnam(TTYGRPNAME)) ? gr->gr_gid : pwd->pw_gid);
417: #if defined(KERBEROS) || defined(KERBEROS5)
418: /* Fork so that we can call kdestroy */
419: if (krbtkfile_env)
420: dofork();
421: #endif
1.15 tholo 422: (void)setegid(pwd->pw_gid);
1.1 deraadt 423: (void)setgid(pwd->pw_gid);
424:
425: initgroups(username, pwd->pw_gid);
426:
427: if (*pwd->pw_shell == '\0')
428: pwd->pw_shell = _PATH_BSHELL;
429:
430: /* Destroy environment unless user has requested its preservation. */
431: if (!pflag)
432: environ = envinit;
1.9 millert 433: else {
434: char **cpp, **cpp2;
435:
436: for (cpp2 = cpp = environ; *cpp; cpp++) {
437: if (strncmp(*cpp, "LD_", 3) &&
438: strncmp(*cpp, "IFS=", 4))
439: *cpp2++ = *cpp;
440: }
441: *cpp2 = 0;
442: }
1.1 deraadt 443: (void)setenv("HOME", pwd->pw_dir, 1);
444: (void)setenv("SHELL", pwd->pw_shell, 1);
445: if (term[0] == '\0')
446: (void)strncpy(term, stypeof(tty), sizeof(term));
447: (void)setenv("TERM", term, 0);
448: (void)setenv("LOGNAME", pwd->pw_name, 1);
449: (void)setenv("USER", pwd->pw_name, 1);
450: (void)setenv("PATH", _PATH_DEFPATH, 0);
1.14 millert 451: if (hostname)
452: (void)setenv("REMOTEHOST", hostname, 1);
453: if (rusername)
454: (void)setenv("REMOTEUSER", rusername, 1);
1.1 deraadt 455: #ifdef KERBEROS
456: if (krbtkfile_env)
457: (void)setenv("KRBTKFILE", krbtkfile_env, 1);
458: #endif
459: #ifdef KERBEROS5
460: if (krbtkfile_env)
461: (void)setenv("KRB5CCNAME", krbtkfile_env, 1);
462: #endif
463:
464: /* If fflag is on, assume caller/authenticator has logged root login. */
465: if (rootlogin && fflag == 0)
466: if (hostname)
1.14 millert 467: syslog(LOG_NOTICE, "ROOT LOGIN (%s) ON %s FROM %s%s%s",
468: username, tty, rusername ? rusername : "",
469: rusername ? "@" : "", hostname);
1.1 deraadt 470: else
471: syslog(LOG_NOTICE, "ROOT LOGIN (%s) ON %s", username, tty);
472:
473: #if defined(KERBEROS) || defined(KERBEROS5)
474: if (!quietlog && notickets == 1)
475: (void)printf("Warning: no Kerberos tickets issued.\n");
476: #endif
477:
478: if (!quietlog) {
1.2 deraadt 479: #if 0
1.1 deraadt 480: (void)printf("%s\n\t%s %s\n\n",
481: "Copyright (c) 1980, 1983, 1986, 1988, 1990, 1991, 1993, 1994",
482: "The Regents of the University of California. ",
483: "All rights reserved.");
1.2 deraadt 484: #endif
1.1 deraadt 485: motd();
486: (void)snprintf(tbuf,
487: sizeof(tbuf), "%s/%s", _PATH_MAILDIR, pwd->pw_name);
488: if (stat(tbuf, &st) == 0 && st.st_size != 0)
489: (void)printf("You have %smail.\n",
490: (st.st_mtime > st.st_atime) ? "new " : "");
491: }
492:
493: (void)signal(SIGALRM, SIG_DFL);
494: (void)signal(SIGQUIT, SIG_DFL);
495: (void)signal(SIGINT, SIG_DFL);
496: (void)signal(SIGTSTP, SIG_IGN);
497:
498: tbuf[0] = '-';
499: (void)strcpy(tbuf + 1, (p = strrchr(pwd->pw_shell, '/')) ?
500: p + 1 : pwd->pw_shell);
501:
502: if (setlogin(pwd->pw_name) < 0)
503: syslog(LOG_ERR, "setlogin() failure: %m");
504:
505: /* Discard permissions last so can't get killed and drop core. */
506: if (rootlogin)
507: (void) setuid(0);
1.15 tholo 508: else {
509: (void) seteuid(pwd->pw_uid);
1.1 deraadt 510: (void) setuid(pwd->pw_uid);
1.15 tholo 511: }
1.1 deraadt 512:
513: execlp(pwd->pw_shell, tbuf, 0);
514: err(1, "%s", pwd->pw_shell);
515: }
516:
517: int
518: pwcheck(user, p, salt, passwd)
519: char *user, *p, *salt, *passwd;
520: {
521: #ifdef SKEY
1.8 millert 522: if (strcasecmp(p, "s/key") == 0)
1.7 deraadt 523: return skey_authenticate(user);
1.1 deraadt 524: #endif
525: return strcmp(crypt(p, salt), passwd);
526: }
527:
528: #if defined(KERBEROS) || defined(KERBEROS5)
529: #define NBUFSIZ (UT_NAMESIZE + 1 + 5) /* .root suffix */
530: #else
531: #define NBUFSIZ (UT_NAMESIZE + 1)
532: #endif
533:
534: #if defined(KERBEROS) || defined(KERBEROS5)
535: /*
536: * This routine handles cleanup stuff, and the like.
537: * It exists only in the child process.
538: */
539: #include <sys/wait.h>
540: void
541: dofork()
542: {
543: int child;
544:
545: if (!(child = fork()))
546: return; /* Child process */
547:
548: /* Setup stuff? This would be things we could do in parallel with login */
549: (void) chdir("/"); /* Let's not keep the fs busy... */
550:
551: /* If we're the parent, watch the child until it dies */
552: while (wait(0) != child)
553: ;
554:
555: /* Cleanup stuff */
556: /* Run kdestroy to destroy tickets */
557: kdestroy();
558:
559: /* Leave */
560: exit(0);
561: }
562: #endif
563:
564: void
565: getloginname()
566: {
567: int ch;
568: char *p;
569: static char nbuf[NBUFSIZ];
570:
571: for (;;) {
572: (void)printf("login: ");
573: for (p = nbuf; (ch = getchar()) != '\n'; ) {
574: if (ch == EOF) {
575: badlogin(username);
576: exit(0);
577: }
578: if (p < nbuf + (NBUFSIZ - 1))
579: *p++ = ch;
580: }
581: if (p > nbuf)
582: if (nbuf[0] == '-')
583: (void)fprintf(stderr,
584: "login names may not start with '-'.\n");
585: else {
586: *p = '\0';
587: username = nbuf;
588: break;
589: }
590: }
591: }
592:
593: int
594: rootterm(ttyn)
595: char *ttyn;
596: {
597: struct ttyent *t;
598:
599: return ((t = getttynam(ttyn)) && t->ty_status & TTY_SECURE);
600: }
601:
602: jmp_buf motdinterrupt;
603:
604: void
605: motd()
606: {
607: int fd, nchars;
608: sig_t oldint;
609: char tbuf[8192];
610:
611: if ((fd = open(_PATH_MOTDFILE, O_RDONLY, 0)) < 0)
612: return;
613: oldint = signal(SIGINT, sigint);
614: if (setjmp(motdinterrupt) == 0)
615: while ((nchars = read(fd, tbuf, sizeof(tbuf))) > 0)
616: (void)write(fileno(stdout), tbuf, nchars);
617: (void)signal(SIGINT, oldint);
618: (void)close(fd);
619: }
620:
621: /* ARGSUSED */
622: void
623: sigint(signo)
624: int signo;
625: {
626: longjmp(motdinterrupt, 1);
627: }
628:
629: /* ARGSUSED */
630: void
631: timedout(signo)
632: int signo;
633: {
634: (void)fprintf(stderr, "Login timed out after %d seconds\n", timeout);
635: exit(0);
636: }
637:
638: void
639: checknologin()
640: {
641: int fd, nchars;
642: char tbuf[8192];
643:
644: if ((fd = open(_PATH_NOLOGIN, O_RDONLY, 0)) >= 0) {
645: while ((nchars = read(fd, tbuf, sizeof(tbuf))) > 0)
646: (void)write(fileno(stdout), tbuf, nchars);
647: sleepexit(0);
648: }
649: }
650:
651: void
652: dolastlog(quiet)
653: int quiet;
654: {
655: struct lastlog ll;
656: int fd;
657:
658: if ((fd = open(_PATH_LASTLOG, O_RDWR, 0)) >= 0) {
659: (void)lseek(fd, (off_t)pwd->pw_uid * sizeof(ll), L_SET);
660: if (!quiet) {
661: if (read(fd, (char *)&ll, sizeof(ll)) == sizeof(ll) &&
662: ll.ll_time != 0) {
663: (void)printf("Last login: %.*s ",
664: 24-5, (char *)ctime(&ll.ll_time));
1.14 millert 665: (void)printf("on %.*s",
666: (int)sizeof(ll.ll_line),
667: ll.ll_line);
1.1 deraadt 668: if (*ll.ll_host != '\0')
1.14 millert 669: (void)printf(" from %.*s",
1.1 deraadt 670: (int)sizeof(ll.ll_host),
671: ll.ll_host);
1.14 millert 672: (void)putchar('\n');
1.1 deraadt 673: }
674: (void)lseek(fd, (off_t)pwd->pw_uid * sizeof(ll), L_SET);
675: }
676: memset((void *)&ll, 0, sizeof(ll));
677: (void)time(&ll.ll_time);
678: (void)strncpy(ll.ll_line, tty, sizeof(ll.ll_line));
679: if (hostname)
680: (void)strncpy(ll.ll_host, hostname, sizeof(ll.ll_host));
681: (void)write(fd, (char *)&ll, sizeof(ll));
682: (void)close(fd);
683: }
684: }
685:
686: void
687: badlogin(name)
688: char *name;
689: {
690: if (failures == 0)
691: return;
692: if (hostname) {
1.14 millert 693: syslog(LOG_NOTICE, "%d LOGIN FAILURE%s FROM %s%s%s",
694: failures, failures > 1 ? "S" : "",
695: rusername ? rusername : "", rusername ? "@" : "", hostname);
1.1 deraadt 696: syslog(LOG_AUTHPRIV|LOG_NOTICE,
1.14 millert 697: "%d LOGIN FAILURE%s FROM %s%s%s, %s",
698: failures, failures > 1 ? "S" : "",
699: rusername ? rusername : "", rusername ? "@" : "",
700: hostname, name);
1.1 deraadt 701: } else {
702: syslog(LOG_NOTICE, "%d LOGIN FAILURE%s ON %s",
703: failures, failures > 1 ? "S" : "", tty);
704: syslog(LOG_AUTHPRIV|LOG_NOTICE,
705: "%d LOGIN FAILURE%s ON %s, %s",
706: failures, failures > 1 ? "S" : "", tty, name);
707: }
708: }
709:
710: #undef UNKNOWN
711: #define UNKNOWN "su"
712:
713: char *
714: stypeof(ttyid)
715: char *ttyid;
716: {
717: struct ttyent *t;
718:
719: return (ttyid && (t = getttynam(ttyid)) ? t->ty_type : UNKNOWN);
720: }
721:
722: void
723: sleepexit(eval)
724: int eval;
725: {
726: (void)sleep(5);
727: exit(eval);
1.11 millert 728: }
729:
730: void
731: sighup(signum)
732: int signum;
733: {
734: if (username)
735: badlogin(username);
736:
737: exit(W_EXITCODE(0, signum));
1.1 deraadt 738: }
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