Annotation of src/usr.bin/login/login.c, Revision 1.16
1.16 ! millert 1: /* $OpenBSD: login.c,v 1.15 1996/12/22 03:25:55 tholo 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
1.16 ! millert 47: static char rcsid[] = "$OpenBSD: login.c,v 1.15 1996/12/22 03:25:55 tholo 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;
224: #ifdef KERBEROS
225: if ((instance = strchr(username, '.')) != NULL) {
226: if (strncmp(instance, ".root", 5) == 0)
227: rootlogin = 1;
228: *instance++ = '\0';
229: } else
230: instance = "";
231: #endif
232: #ifdef KERBEROS5
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: if (strlen(username) > UT_NAMESIZE)
241: username[UT_NAMESIZE] = '\0';
242:
243: /*
244: * Note if trying multiple user names; log failures for
245: * previous user name, but don't bother logging one failure
246: * for nonexistent name (mistyped username).
247: */
248: if (failures && strcmp(tbuf, username)) {
249: if (failures > (pwd ? 0 : 1))
250: badlogin(tbuf);
251: failures = 0;
252: }
253: (void)strcpy(tbuf, username);
254:
1.12 millert 255: if ((pwd = getpwnam(username)))
1.1 deraadt 256: salt = pwd->pw_passwd;
257: else
258: salt = "xx";
259:
260: /*
261: * if we have a valid account name, and it doesn't have a
262: * password, or the -f option was specified and the caller
263: * is root or the caller isn't changing their uid, don't
264: * authenticate.
265: */
266: if (pwd) {
267: if (pwd->pw_uid == 0)
268: rootlogin = 1;
269:
270: if (fflag && (uid == 0 || uid == pwd->pw_uid)) {
271: /* already authenticated */
272: break;
273: } else if (pwd->pw_passwd[0] == '\0') {
274: /* pretend password okay */
275: rval = 0;
276: goto ttycheck;
277: }
278: }
279:
280: fflag = 0;
281:
282: (void)setpriority(PRIO_PROCESS, 0, -4);
283:
284: p = getpass("Password:");
285:
286: if (pwd) {
287: #if defined(KERBEROS) || defined(KERBEROS5)
288: rval = klogin(pwd, instance, localhost, p);
289: if (rval != 0 && rootlogin && pwd->pw_uid != 0)
290: rootlogin = 0;
291: if (rval == 0)
292: authok = 1;
293: else if (rval == 1) {
294: if (pwd->pw_uid != 0)
295: rootlogin = 0;
296: rval = pwcheck(username, p, salt, pwd->pw_passwd);
297: }
298: #else
299: rval = pwcheck(username, p, salt, pwd->pw_passwd);
300: #endif
301: }
302: memset(p, 0, strlen(p));
303:
304: (void)setpriority(PRIO_PROCESS, 0, 0);
305:
306: ttycheck:
307: /*
308: * If trying to log in as root without Kerberos,
309: * but with insecure terminal, refuse the login attempt.
310: */
311: #if defined(KERBEROS) || defined(KERBEROS5)
312: if (authok == 0)
313: #endif
314: if (pwd && !rval && rootlogin && !rootterm(tty)) {
315: (void)fprintf(stderr,
316: "%s login refused on this terminal.\n",
317: pwd->pw_name);
318: if (hostname)
319: syslog(LOG_NOTICE,
1.14 millert 320: "LOGIN %s REFUSED FROM %s%s%s ON TTY %s",
321: pwd->pw_name, rusername ? rusername : "",
322: rusername ? "@" : "", hostname, tty);
1.1 deraadt 323: else
324: syslog(LOG_NOTICE,
325: "LOGIN %s REFUSED ON TTY %s",
326: pwd->pw_name, tty);
327: continue;
328: }
329:
330: if (pwd && !rval)
331: break;
332:
333: (void)printf("Login incorrect\n");
334: failures++;
1.13 millert 335: if (pwd)
1.14 millert 336: log_failedlogin(pwd->pw_uid, hostname, rusername, tty);
1.1 deraadt 337: /* we allow 10 tries, but after 3 we start backing off */
338: if (++cnt > 3) {
339: if (cnt >= 10) {
340: badlogin(username);
341: sleepexit(1);
342: }
343: sleep((u_int)((cnt - 3) * 5));
344: }
345: }
346:
347: /* committed to login -- turn off timeout */
348: (void)alarm((u_int)0);
349:
350: endpwent();
351:
352: /* if user not super-user, check for disabled logins */
353: if (!rootlogin)
354: checknologin();
355:
1.5 deraadt 356: setegid(pwd->pw_gid);
357: seteuid(pwd->pw_uid);
358:
1.1 deraadt 359: if (chdir(pwd->pw_dir) < 0) {
360: (void)printf("No home directory %s!\n", pwd->pw_dir);
361: if (chdir("/"))
362: exit(0);
363: pwd->pw_dir = "/";
364: (void)printf("Logging in with home = \"/\".\n");
365: }
366:
367: quietlog = access(_PATH_HUSHLOGIN, F_OK) == 0;
1.5 deraadt 368:
369: seteuid(0);
370: setegid(0); /* XXX use a saved gid instead? */
1.1 deraadt 371:
372: if (pwd->pw_change || pwd->pw_expire)
373: (void)gettimeofday(&tp, (struct timezone *)NULL);
374: if (pwd->pw_change)
375: if (tp.tv_sec >= pwd->pw_change) {
376: (void)printf("Sorry -- your password has expired.\n");
377: sleepexit(1);
378: } else if (pwd->pw_change - tp.tv_sec <
379: 2 * DAYSPERWEEK * SECSPERDAY && !quietlog)
380: (void)printf("Warning: your password expires on %s",
381: ctime(&pwd->pw_change));
382: if (pwd->pw_expire)
383: if (tp.tv_sec >= pwd->pw_expire) {
384: (void)printf("Sorry -- your account has expired.\n");
385: sleepexit(1);
386: } else if (pwd->pw_expire - tp.tv_sec <
387: 2 * DAYSPERWEEK * SECSPERDAY && !quietlog)
388: (void)printf("Warning: your account expires on %s",
389: ctime(&pwd->pw_expire));
390:
391: /* Nothing else left to fail -- really log in. */
1.11 millert 392: (void)signal(SIGHUP, SIG_DFL);
1.1 deraadt 393: memset((void *)&utmp, 0, sizeof(utmp));
394: (void)time(&utmp.ut_time);
395: (void)strncpy(utmp.ut_name, username, sizeof(utmp.ut_name));
396: if (hostname)
397: (void)strncpy(utmp.ut_host, hostname, sizeof(utmp.ut_host));
398: (void)strncpy(utmp.ut_line, tty, sizeof(utmp.ut_line));
399: login(&utmp);
400:
1.13 millert 401: if (!quietlog)
402: (void)check_failedlogin(pwd->pw_uid);
1.1 deraadt 403: dolastlog(quietlog);
1.6 deraadt 404:
405: login_fbtab(tty, pwd->pw_uid, pwd->pw_gid);
1.1 deraadt 406:
407: (void)chown(ttyn, pwd->pw_uid,
408: (gr = getgrnam(TTYGRPNAME)) ? gr->gr_gid : pwd->pw_gid);
409: #if defined(KERBEROS) || defined(KERBEROS5)
410: /* Fork so that we can call kdestroy */
411: if (krbtkfile_env)
412: dofork();
413: #endif
1.15 tholo 414: (void)setegid(pwd->pw_gid);
1.1 deraadt 415: (void)setgid(pwd->pw_gid);
416:
417: initgroups(username, pwd->pw_gid);
418:
419: if (*pwd->pw_shell == '\0')
420: pwd->pw_shell = _PATH_BSHELL;
421:
422: /* Destroy environment unless user has requested its preservation. */
423: if (!pflag)
424: environ = envinit;
1.9 millert 425: else {
426: char **cpp, **cpp2;
427:
428: for (cpp2 = cpp = environ; *cpp; cpp++) {
429: if (strncmp(*cpp, "LD_", 3) &&
430: strncmp(*cpp, "IFS=", 4))
431: *cpp2++ = *cpp;
432: }
433: *cpp2 = 0;
434: }
1.1 deraadt 435: (void)setenv("HOME", pwd->pw_dir, 1);
436: (void)setenv("SHELL", pwd->pw_shell, 1);
437: if (term[0] == '\0')
438: (void)strncpy(term, stypeof(tty), sizeof(term));
439: (void)setenv("TERM", term, 0);
440: (void)setenv("LOGNAME", pwd->pw_name, 1);
441: (void)setenv("USER", pwd->pw_name, 1);
442: (void)setenv("PATH", _PATH_DEFPATH, 0);
1.14 millert 443: if (hostname)
444: (void)setenv("REMOTEHOST", hostname, 1);
445: if (rusername)
446: (void)setenv("REMOTEUSER", rusername, 1);
1.1 deraadt 447: #ifdef KERBEROS
448: if (krbtkfile_env)
449: (void)setenv("KRBTKFILE", krbtkfile_env, 1);
450: #endif
451: #ifdef KERBEROS5
452: if (krbtkfile_env)
453: (void)setenv("KRB5CCNAME", krbtkfile_env, 1);
454: #endif
455:
456: /* If fflag is on, assume caller/authenticator has logged root login. */
457: if (rootlogin && fflag == 0)
458: if (hostname)
1.14 millert 459: syslog(LOG_NOTICE, "ROOT LOGIN (%s) ON %s FROM %s%s%s",
460: username, tty, rusername ? rusername : "",
461: rusername ? "@" : "", hostname);
1.1 deraadt 462: else
463: syslog(LOG_NOTICE, "ROOT LOGIN (%s) ON %s", username, tty);
464:
465: #if defined(KERBEROS) || defined(KERBEROS5)
466: if (!quietlog && notickets == 1)
467: (void)printf("Warning: no Kerberos tickets issued.\n");
468: #endif
469:
470: if (!quietlog) {
1.2 deraadt 471: #if 0
1.1 deraadt 472: (void)printf("%s\n\t%s %s\n\n",
473: "Copyright (c) 1980, 1983, 1986, 1988, 1990, 1991, 1993, 1994",
474: "The Regents of the University of California. ",
475: "All rights reserved.");
1.2 deraadt 476: #endif
1.1 deraadt 477: motd();
478: (void)snprintf(tbuf,
479: sizeof(tbuf), "%s/%s", _PATH_MAILDIR, pwd->pw_name);
480: if (stat(tbuf, &st) == 0 && st.st_size != 0)
481: (void)printf("You have %smail.\n",
482: (st.st_mtime > st.st_atime) ? "new " : "");
483: }
484:
485: (void)signal(SIGALRM, SIG_DFL);
486: (void)signal(SIGQUIT, SIG_DFL);
487: (void)signal(SIGINT, SIG_DFL);
488: (void)signal(SIGTSTP, SIG_IGN);
489:
490: tbuf[0] = '-';
491: (void)strcpy(tbuf + 1, (p = strrchr(pwd->pw_shell, '/')) ?
492: p + 1 : pwd->pw_shell);
493:
494: if (setlogin(pwd->pw_name) < 0)
495: syslog(LOG_ERR, "setlogin() failure: %m");
496:
497: /* Discard permissions last so can't get killed and drop core. */
498: if (rootlogin)
499: (void) setuid(0);
1.15 tholo 500: else {
501: (void) seteuid(pwd->pw_uid);
1.1 deraadt 502: (void) setuid(pwd->pw_uid);
1.15 tholo 503: }
1.1 deraadt 504:
505: execlp(pwd->pw_shell, tbuf, 0);
506: err(1, "%s", pwd->pw_shell);
507: }
508:
509: int
510: pwcheck(user, p, salt, passwd)
511: char *user, *p, *salt, *passwd;
512: {
513: #ifdef SKEY
1.8 millert 514: if (strcasecmp(p, "s/key") == 0)
1.7 deraadt 515: return skey_authenticate(user);
1.1 deraadt 516: #endif
517: return strcmp(crypt(p, salt), passwd);
518: }
519:
520: #if defined(KERBEROS) || defined(KERBEROS5)
521: #define NBUFSIZ (UT_NAMESIZE + 1 + 5) /* .root suffix */
522: #else
523: #define NBUFSIZ (UT_NAMESIZE + 1)
524: #endif
525:
526: #if defined(KERBEROS) || defined(KERBEROS5)
527: /*
528: * This routine handles cleanup stuff, and the like.
529: * It exists only in the child process.
530: */
531: #include <sys/wait.h>
532: void
533: dofork()
534: {
535: int child;
536:
537: if (!(child = fork()))
538: return; /* Child process */
539:
540: /* Setup stuff? This would be things we could do in parallel with login */
541: (void) chdir("/"); /* Let's not keep the fs busy... */
542:
543: /* If we're the parent, watch the child until it dies */
544: while (wait(0) != child)
545: ;
546:
547: /* Cleanup stuff */
548: /* Run kdestroy to destroy tickets */
549: kdestroy();
550:
551: /* Leave */
552: exit(0);
553: }
554: #endif
555:
556: void
557: getloginname()
558: {
559: int ch;
560: char *p;
561: static char nbuf[NBUFSIZ];
562:
563: for (;;) {
564: (void)printf("login: ");
565: for (p = nbuf; (ch = getchar()) != '\n'; ) {
566: if (ch == EOF) {
567: badlogin(username);
568: exit(0);
569: }
570: if (p < nbuf + (NBUFSIZ - 1))
571: *p++ = ch;
572: }
573: if (p > nbuf)
574: if (nbuf[0] == '-')
575: (void)fprintf(stderr,
576: "login names may not start with '-'.\n");
577: else {
578: *p = '\0';
579: username = nbuf;
580: break;
581: }
582: }
583: }
584:
585: int
586: rootterm(ttyn)
587: char *ttyn;
588: {
589: struct ttyent *t;
590:
591: return ((t = getttynam(ttyn)) && t->ty_status & TTY_SECURE);
592: }
593:
594: jmp_buf motdinterrupt;
595:
596: void
597: motd()
598: {
599: int fd, nchars;
600: sig_t oldint;
601: char tbuf[8192];
602:
603: if ((fd = open(_PATH_MOTDFILE, O_RDONLY, 0)) < 0)
604: return;
605: oldint = signal(SIGINT, sigint);
606: if (setjmp(motdinterrupt) == 0)
607: while ((nchars = read(fd, tbuf, sizeof(tbuf))) > 0)
608: (void)write(fileno(stdout), tbuf, nchars);
609: (void)signal(SIGINT, oldint);
610: (void)close(fd);
611: }
612:
613: /* ARGSUSED */
614: void
615: sigint(signo)
616: int signo;
617: {
618: longjmp(motdinterrupt, 1);
619: }
620:
621: /* ARGSUSED */
622: void
623: timedout(signo)
624: int signo;
625: {
626: (void)fprintf(stderr, "Login timed out after %d seconds\n", timeout);
627: exit(0);
628: }
629:
630: void
631: checknologin()
632: {
633: int fd, nchars;
634: char tbuf[8192];
635:
636: if ((fd = open(_PATH_NOLOGIN, O_RDONLY, 0)) >= 0) {
637: while ((nchars = read(fd, tbuf, sizeof(tbuf))) > 0)
638: (void)write(fileno(stdout), tbuf, nchars);
639: sleepexit(0);
640: }
641: }
642:
643: void
644: dolastlog(quiet)
645: int quiet;
646: {
647: struct lastlog ll;
648: int fd;
649:
650: if ((fd = open(_PATH_LASTLOG, O_RDWR, 0)) >= 0) {
651: (void)lseek(fd, (off_t)pwd->pw_uid * sizeof(ll), L_SET);
652: if (!quiet) {
653: if (read(fd, (char *)&ll, sizeof(ll)) == sizeof(ll) &&
654: ll.ll_time != 0) {
655: (void)printf("Last login: %.*s ",
656: 24-5, (char *)ctime(&ll.ll_time));
1.14 millert 657: (void)printf("on %.*s",
658: (int)sizeof(ll.ll_line),
659: ll.ll_line);
1.1 deraadt 660: if (*ll.ll_host != '\0')
1.14 millert 661: (void)printf(" from %.*s",
1.1 deraadt 662: (int)sizeof(ll.ll_host),
663: ll.ll_host);
1.14 millert 664: (void)putchar('\n');
1.1 deraadt 665: }
666: (void)lseek(fd, (off_t)pwd->pw_uid * sizeof(ll), L_SET);
667: }
668: memset((void *)&ll, 0, sizeof(ll));
669: (void)time(&ll.ll_time);
670: (void)strncpy(ll.ll_line, tty, sizeof(ll.ll_line));
671: if (hostname)
672: (void)strncpy(ll.ll_host, hostname, sizeof(ll.ll_host));
673: (void)write(fd, (char *)&ll, sizeof(ll));
674: (void)close(fd);
675: }
676: }
677:
678: void
679: badlogin(name)
680: char *name;
681: {
682: if (failures == 0)
683: return;
684: if (hostname) {
1.14 millert 685: syslog(LOG_NOTICE, "%d LOGIN FAILURE%s FROM %s%s%s",
686: failures, failures > 1 ? "S" : "",
687: rusername ? rusername : "", rusername ? "@" : "", hostname);
1.1 deraadt 688: syslog(LOG_AUTHPRIV|LOG_NOTICE,
1.14 millert 689: "%d LOGIN FAILURE%s FROM %s%s%s, %s",
690: failures, failures > 1 ? "S" : "",
691: rusername ? rusername : "", rusername ? "@" : "",
692: hostname, name);
1.1 deraadt 693: } else {
694: syslog(LOG_NOTICE, "%d LOGIN FAILURE%s ON %s",
695: failures, failures > 1 ? "S" : "", tty);
696: syslog(LOG_AUTHPRIV|LOG_NOTICE,
697: "%d LOGIN FAILURE%s ON %s, %s",
698: failures, failures > 1 ? "S" : "", tty, name);
699: }
700: }
701:
702: #undef UNKNOWN
703: #define UNKNOWN "su"
704:
705: char *
706: stypeof(ttyid)
707: char *ttyid;
708: {
709: struct ttyent *t;
710:
711: return (ttyid && (t = getttynam(ttyid)) ? t->ty_type : UNKNOWN);
712: }
713:
714: void
715: sleepexit(eval)
716: int eval;
717: {
718: (void)sleep(5);
719: exit(eval);
1.11 millert 720: }
721:
722: void
723: sighup(signum)
724: int signum;
725: {
726: if (username)
727: badlogin(username);
728:
729: exit(W_EXITCODE(0, signum));
1.1 deraadt 730: }