Annotation of src/usr.bin/login/login.c, Revision 1.20
1.20 ! deraadt 1: /* $OpenBSD: login.c,v 1.19 1997/02/16 04:39:07 downsj 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
1.20 ! deraadt 47: static char rcsid[] = "$OpenBSD: login.c,v 1.19 1997/02/16 04:39:07 downsj 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: }
1.20 ! deraadt 261: (void)strncpy(tbuf, username, sizeof tbuf-1);
! 262: tbuf[sizeof tbuf-1] = '\0';
1.1 deraadt 263:
1.12 millert 264: if ((pwd = getpwnam(username)))
1.1 deraadt 265: salt = pwd->pw_passwd;
266: else
267: salt = "xx";
268:
269: /*
270: * if we have a valid account name, and it doesn't have a
271: * password, or the -f option was specified and the caller
272: * is root or the caller isn't changing their uid, don't
273: * authenticate.
274: */
275: if (pwd) {
276: if (pwd->pw_uid == 0)
277: rootlogin = 1;
278:
279: if (fflag && (uid == 0 || uid == pwd->pw_uid)) {
280: /* already authenticated */
281: break;
282: } else if (pwd->pw_passwd[0] == '\0') {
283: /* pretend password okay */
284: rval = 0;
285: goto ttycheck;
286: }
287: }
288:
289: fflag = 0;
290:
291: (void)setpriority(PRIO_PROCESS, 0, -4);
292:
293: p = getpass("Password:");
294:
295: if (pwd) {
296: #if defined(KERBEROS) || defined(KERBEROS5)
297: rval = klogin(pwd, instance, localhost, p);
298: if (rval != 0 && rootlogin && pwd->pw_uid != 0)
299: rootlogin = 0;
300: if (rval == 0)
301: authok = 1;
302: else if (rval == 1) {
303: if (pwd->pw_uid != 0)
304: rootlogin = 0;
305: rval = pwcheck(username, p, salt, pwd->pw_passwd);
306: }
307: #else
308: rval = pwcheck(username, p, salt, pwd->pw_passwd);
309: #endif
310: }
311: memset(p, 0, strlen(p));
312:
313: (void)setpriority(PRIO_PROCESS, 0, 0);
314:
315: ttycheck:
316: /*
317: * If trying to log in as root without Kerberos,
318: * but with insecure terminal, refuse the login attempt.
319: */
320: #if defined(KERBEROS) || defined(KERBEROS5)
321: if (authok == 0)
322: #endif
323: if (pwd && !rval && rootlogin && !rootterm(tty)) {
324: (void)fprintf(stderr,
325: "%s login refused on this terminal.\n",
326: pwd->pw_name);
327: if (hostname)
328: syslog(LOG_NOTICE,
1.14 millert 329: "LOGIN %s REFUSED FROM %s%s%s ON TTY %s",
330: pwd->pw_name, rusername ? rusername : "",
331: rusername ? "@" : "", hostname, tty);
1.1 deraadt 332: else
333: syslog(LOG_NOTICE,
334: "LOGIN %s REFUSED ON TTY %s",
335: pwd->pw_name, tty);
336: continue;
337: }
338:
339: if (pwd && !rval)
340: break;
341:
342: (void)printf("Login incorrect\n");
343: failures++;
1.13 millert 344: if (pwd)
1.14 millert 345: log_failedlogin(pwd->pw_uid, hostname, rusername, tty);
1.1 deraadt 346: /* we allow 10 tries, but after 3 we start backing off */
347: if (++cnt > 3) {
348: if (cnt >= 10) {
349: badlogin(username);
350: sleepexit(1);
351: }
352: sleep((u_int)((cnt - 3) * 5));
353: }
354: }
355:
356: /* committed to login -- turn off timeout */
357: (void)alarm((u_int)0);
358:
359: endpwent();
360:
361: /* if user not super-user, check for disabled logins */
362: if (!rootlogin)
363: checknologin();
364:
1.5 deraadt 365: setegid(pwd->pw_gid);
366: seteuid(pwd->pw_uid);
367:
1.1 deraadt 368: if (chdir(pwd->pw_dir) < 0) {
369: (void)printf("No home directory %s!\n", pwd->pw_dir);
370: if (chdir("/"))
371: exit(0);
372: pwd->pw_dir = "/";
373: (void)printf("Logging in with home = \"/\".\n");
374: }
375:
1.19 downsj 376: quietlog = ((strcmp(pwd->pw_shell, "/sbin/nologin") == 0) ||
377: (access(_PATH_HUSHLOGIN, F_OK) == 0));
1.5 deraadt 378:
379: seteuid(0);
380: setegid(0); /* XXX use a saved gid instead? */
1.1 deraadt 381:
382: if (pwd->pw_change || pwd->pw_expire)
383: (void)gettimeofday(&tp, (struct timezone *)NULL);
384: if (pwd->pw_change)
385: if (tp.tv_sec >= pwd->pw_change) {
386: (void)printf("Sorry -- your password has expired.\n");
387: sleepexit(1);
388: } else if (pwd->pw_change - tp.tv_sec <
389: 2 * DAYSPERWEEK * SECSPERDAY && !quietlog)
390: (void)printf("Warning: your password expires on %s",
391: ctime(&pwd->pw_change));
392: if (pwd->pw_expire)
393: if (tp.tv_sec >= pwd->pw_expire) {
394: (void)printf("Sorry -- your account has expired.\n");
395: sleepexit(1);
396: } else if (pwd->pw_expire - tp.tv_sec <
397: 2 * DAYSPERWEEK * SECSPERDAY && !quietlog)
398: (void)printf("Warning: your account expires on %s",
399: ctime(&pwd->pw_expire));
400:
401: /* Nothing else left to fail -- really log in. */
1.11 millert 402: (void)signal(SIGHUP, SIG_DFL);
1.1 deraadt 403: memset((void *)&utmp, 0, sizeof(utmp));
404: (void)time(&utmp.ut_time);
405: (void)strncpy(utmp.ut_name, username, sizeof(utmp.ut_name));
406: if (hostname)
407: (void)strncpy(utmp.ut_host, hostname, sizeof(utmp.ut_host));
408: (void)strncpy(utmp.ut_line, tty, sizeof(utmp.ut_line));
409: login(&utmp);
410:
1.13 millert 411: if (!quietlog)
412: (void)check_failedlogin(pwd->pw_uid);
1.1 deraadt 413: dolastlog(quietlog);
1.6 deraadt 414:
415: login_fbtab(tty, pwd->pw_uid, pwd->pw_gid);
1.1 deraadt 416:
417: (void)chown(ttyn, pwd->pw_uid,
418: (gr = getgrnam(TTYGRPNAME)) ? gr->gr_gid : pwd->pw_gid);
419: #if defined(KERBEROS) || defined(KERBEROS5)
420: /* Fork so that we can call kdestroy */
421: if (krbtkfile_env)
422: dofork();
423: #endif
1.15 tholo 424: (void)setegid(pwd->pw_gid);
1.1 deraadt 425: (void)setgid(pwd->pw_gid);
426:
427: initgroups(username, pwd->pw_gid);
428:
429: if (*pwd->pw_shell == '\0')
430: pwd->pw_shell = _PATH_BSHELL;
431:
432: /* Destroy environment unless user has requested its preservation. */
433: if (!pflag)
434: environ = envinit;
1.9 millert 435: else {
436: char **cpp, **cpp2;
437:
438: for (cpp2 = cpp = environ; *cpp; cpp++) {
439: if (strncmp(*cpp, "LD_", 3) &&
440: strncmp(*cpp, "IFS=", 4))
441: *cpp2++ = *cpp;
442: }
443: *cpp2 = 0;
444: }
1.1 deraadt 445: (void)setenv("HOME", pwd->pw_dir, 1);
446: (void)setenv("SHELL", pwd->pw_shell, 1);
447: if (term[0] == '\0')
448: (void)strncpy(term, stypeof(tty), sizeof(term));
449: (void)setenv("TERM", term, 0);
450: (void)setenv("LOGNAME", pwd->pw_name, 1);
451: (void)setenv("USER", pwd->pw_name, 1);
452: (void)setenv("PATH", _PATH_DEFPATH, 0);
1.14 millert 453: if (hostname)
454: (void)setenv("REMOTEHOST", hostname, 1);
455: if (rusername)
456: (void)setenv("REMOTEUSER", rusername, 1);
1.1 deraadt 457: #ifdef KERBEROS
458: if (krbtkfile_env)
459: (void)setenv("KRBTKFILE", krbtkfile_env, 1);
460: #endif
461: #ifdef KERBEROS5
462: if (krbtkfile_env)
463: (void)setenv("KRB5CCNAME", krbtkfile_env, 1);
464: #endif
465:
466: /* If fflag is on, assume caller/authenticator has logged root login. */
467: if (rootlogin && fflag == 0)
468: if (hostname)
1.14 millert 469: syslog(LOG_NOTICE, "ROOT LOGIN (%s) ON %s FROM %s%s%s",
470: username, tty, rusername ? rusername : "",
471: rusername ? "@" : "", hostname);
1.1 deraadt 472: else
473: syslog(LOG_NOTICE, "ROOT LOGIN (%s) ON %s", username, tty);
474:
475: #if defined(KERBEROS) || defined(KERBEROS5)
476: if (!quietlog && notickets == 1)
477: (void)printf("Warning: no Kerberos tickets issued.\n");
478: #endif
479:
480: if (!quietlog) {
1.2 deraadt 481: #if 0
1.1 deraadt 482: (void)printf("%s\n\t%s %s\n\n",
483: "Copyright (c) 1980, 1983, 1986, 1988, 1990, 1991, 1993, 1994",
484: "The Regents of the University of California. ",
485: "All rights reserved.");
1.2 deraadt 486: #endif
1.1 deraadt 487: motd();
488: (void)snprintf(tbuf,
489: sizeof(tbuf), "%s/%s", _PATH_MAILDIR, pwd->pw_name);
490: if (stat(tbuf, &st) == 0 && st.st_size != 0)
491: (void)printf("You have %smail.\n",
492: (st.st_mtime > st.st_atime) ? "new " : "");
493: }
494:
495: (void)signal(SIGALRM, SIG_DFL);
496: (void)signal(SIGQUIT, SIG_DFL);
497: (void)signal(SIGINT, SIG_DFL);
498: (void)signal(SIGTSTP, SIG_IGN);
499:
500: tbuf[0] = '-';
1.20 ! deraadt 501: (void)strncpy(tbuf + 1, (p = strrchr(pwd->pw_shell, '/')) ?
! 502: p + 1 : pwd->pw_shell, sizeof tbuf - 1 - 1);
! 503: tbuf[sizeof tbuf - 1] = '\0';
1.1 deraadt 504:
505: if (setlogin(pwd->pw_name) < 0)
506: syslog(LOG_ERR, "setlogin() failure: %m");
507:
508: /* Discard permissions last so can't get killed and drop core. */
509: if (rootlogin)
510: (void) setuid(0);
1.15 tholo 511: else {
512: (void) seteuid(pwd->pw_uid);
1.1 deraadt 513: (void) setuid(pwd->pw_uid);
1.15 tholo 514: }
1.1 deraadt 515:
516: execlp(pwd->pw_shell, tbuf, 0);
517: err(1, "%s", pwd->pw_shell);
518: }
519:
520: int
521: pwcheck(user, p, salt, passwd)
522: char *user, *p, *salt, *passwd;
523: {
524: #ifdef SKEY
1.8 millert 525: if (strcasecmp(p, "s/key") == 0)
1.7 deraadt 526: return skey_authenticate(user);
1.1 deraadt 527: #endif
528: return strcmp(crypt(p, salt), passwd);
529: }
530:
531: #if defined(KERBEROS) || defined(KERBEROS5)
532: #define NBUFSIZ (UT_NAMESIZE + 1 + 5) /* .root suffix */
533: #else
534: #define NBUFSIZ (UT_NAMESIZE + 1)
535: #endif
536:
537: #if defined(KERBEROS) || defined(KERBEROS5)
538: /*
539: * This routine handles cleanup stuff, and the like.
540: * It exists only in the child process.
541: */
542: #include <sys/wait.h>
543: void
544: dofork()
545: {
546: int child;
547:
548: if (!(child = fork()))
549: return; /* Child process */
550:
551: /* Setup stuff? This would be things we could do in parallel with login */
552: (void) chdir("/"); /* Let's not keep the fs busy... */
553:
554: /* If we're the parent, watch the child until it dies */
555: while (wait(0) != child)
556: ;
557:
558: /* Cleanup stuff */
559: /* Run kdestroy to destroy tickets */
560: kdestroy();
561:
562: /* Leave */
563: exit(0);
564: }
565: #endif
566:
567: void
568: getloginname()
569: {
570: int ch;
571: char *p;
572: static char nbuf[NBUFSIZ];
573:
574: for (;;) {
575: (void)printf("login: ");
576: for (p = nbuf; (ch = getchar()) != '\n'; ) {
577: if (ch == EOF) {
578: badlogin(username);
579: exit(0);
580: }
581: if (p < nbuf + (NBUFSIZ - 1))
582: *p++ = ch;
583: }
584: if (p > nbuf)
585: if (nbuf[0] == '-')
586: (void)fprintf(stderr,
587: "login names may not start with '-'.\n");
588: else {
589: *p = '\0';
590: username = nbuf;
591: break;
592: }
593: }
594: }
595:
596: int
597: rootterm(ttyn)
598: char *ttyn;
599: {
600: struct ttyent *t;
601:
602: return ((t = getttynam(ttyn)) && t->ty_status & TTY_SECURE);
603: }
604:
605: jmp_buf motdinterrupt;
606:
607: void
608: motd()
609: {
610: int fd, nchars;
611: sig_t oldint;
612: char tbuf[8192];
613:
614: if ((fd = open(_PATH_MOTDFILE, O_RDONLY, 0)) < 0)
615: return;
616: oldint = signal(SIGINT, sigint);
617: if (setjmp(motdinterrupt) == 0)
618: while ((nchars = read(fd, tbuf, sizeof(tbuf))) > 0)
619: (void)write(fileno(stdout), tbuf, nchars);
620: (void)signal(SIGINT, oldint);
621: (void)close(fd);
622: }
623:
624: /* ARGSUSED */
625: void
626: sigint(signo)
627: int signo;
628: {
629: longjmp(motdinterrupt, 1);
630: }
631:
632: /* ARGSUSED */
633: void
634: timedout(signo)
635: int signo;
636: {
637: (void)fprintf(stderr, "Login timed out after %d seconds\n", timeout);
638: exit(0);
639: }
640:
641: void
642: checknologin()
643: {
644: int fd, nchars;
645: char tbuf[8192];
646:
647: if ((fd = open(_PATH_NOLOGIN, O_RDONLY, 0)) >= 0) {
648: while ((nchars = read(fd, tbuf, sizeof(tbuf))) > 0)
649: (void)write(fileno(stdout), tbuf, nchars);
650: sleepexit(0);
651: }
652: }
653:
654: void
655: dolastlog(quiet)
656: int quiet;
657: {
658: struct lastlog ll;
659: int fd;
660:
661: if ((fd = open(_PATH_LASTLOG, O_RDWR, 0)) >= 0) {
662: (void)lseek(fd, (off_t)pwd->pw_uid * sizeof(ll), L_SET);
663: if (!quiet) {
664: if (read(fd, (char *)&ll, sizeof(ll)) == sizeof(ll) &&
665: ll.ll_time != 0) {
666: (void)printf("Last login: %.*s ",
667: 24-5, (char *)ctime(&ll.ll_time));
1.14 millert 668: (void)printf("on %.*s",
669: (int)sizeof(ll.ll_line),
670: ll.ll_line);
1.1 deraadt 671: if (*ll.ll_host != '\0')
1.14 millert 672: (void)printf(" from %.*s",
1.1 deraadt 673: (int)sizeof(ll.ll_host),
674: ll.ll_host);
1.14 millert 675: (void)putchar('\n');
1.1 deraadt 676: }
677: (void)lseek(fd, (off_t)pwd->pw_uid * sizeof(ll), L_SET);
678: }
679: memset((void *)&ll, 0, sizeof(ll));
680: (void)time(&ll.ll_time);
681: (void)strncpy(ll.ll_line, tty, sizeof(ll.ll_line));
682: if (hostname)
683: (void)strncpy(ll.ll_host, hostname, sizeof(ll.ll_host));
684: (void)write(fd, (char *)&ll, sizeof(ll));
685: (void)close(fd);
686: }
687: }
688:
689: void
690: badlogin(name)
691: char *name;
692: {
693: if (failures == 0)
694: return;
695: if (hostname) {
1.14 millert 696: syslog(LOG_NOTICE, "%d LOGIN FAILURE%s FROM %s%s%s",
697: failures, failures > 1 ? "S" : "",
698: rusername ? rusername : "", rusername ? "@" : "", hostname);
1.1 deraadt 699: syslog(LOG_AUTHPRIV|LOG_NOTICE,
1.14 millert 700: "%d LOGIN FAILURE%s FROM %s%s%s, %s",
701: failures, failures > 1 ? "S" : "",
702: rusername ? rusername : "", rusername ? "@" : "",
703: hostname, name);
1.1 deraadt 704: } else {
705: syslog(LOG_NOTICE, "%d LOGIN FAILURE%s ON %s",
706: failures, failures > 1 ? "S" : "", tty);
707: syslog(LOG_AUTHPRIV|LOG_NOTICE,
708: "%d LOGIN FAILURE%s ON %s, %s",
709: failures, failures > 1 ? "S" : "", tty, name);
710: }
711: }
712:
713: #undef UNKNOWN
714: #define UNKNOWN "su"
715:
716: char *
717: stypeof(ttyid)
718: char *ttyid;
719: {
720: struct ttyent *t;
721:
722: return (ttyid && (t = getttynam(ttyid)) ? t->ty_type : UNKNOWN);
723: }
724:
725: void
726: sleepexit(eval)
727: int eval;
728: {
729: (void)sleep(5);
730: exit(eval);
1.11 millert 731: }
732:
733: void
734: sighup(signum)
735: int signum;
736: {
737: if (username)
738: badlogin(username);
739:
740: exit(W_EXITCODE(0, signum));
1.1 deraadt 741: }
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