Commit | Line | Data |
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bcf1365c | 1 | /* |
ede75793 KB |
2 | * Copyright (c) 1980, 1987, 1988 The Regents of the University of California. |
3 | * All rights reserved. | |
4 | * | |
5 | * Redistribution and use in source and binary forms are permitted | |
6 | * provided that the above copyright notice and this paragraph are | |
7 | * duplicated in all such forms and that any documentation, | |
8 | * advertising materials, and other materials related to such | |
9 | * distribution and use acknowledge that the software was developed | |
10 | * by the University of California, Berkeley. The name of the | |
11 | * University may not be used to endorse or promote products derived | |
12 | * from this software without specific prior written permission. | |
13 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | |
14 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | |
15 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
bcf1365c DF |
16 | */ |
17 | ||
18 | #ifndef lint | |
19 | char copyright[] = | |
ede75793 | 20 | "@(#) Copyright (c) 1980, 1987, 1988 The Regents of the University of California.\n\ |
bcf1365c | 21 | All rights reserved.\n"; |
ede75793 | 22 | #endif /* not lint */ |
bcf1365c | 23 | |
22d4760e | 24 | #ifndef lint |
3d28f6dd | 25 | static char sccsid[] = "@(#)login.c 5.49 (Berkeley) %G%"; |
ede75793 | 26 | #endif /* not lint */ |
22d4760e | 27 | |
88a01c09 BJ |
28 | /* |
29 | * login [ name ] | |
d0faf133 | 30 | * login -r hostname (for rlogind) |
5dbe2745 MK |
31 | * login -h hostname (for telnetd, etc.) |
32 | * login -f name (for pre-authenticated login: datakit, xterm, etc.) | |
88a01c09 BJ |
33 | */ |
34 | ||
7a625b73 | 35 | #include <sys/param.h> |
a339b173 | 36 | #include <ufs/quota.h> |
3b8dd95e SL |
37 | #include <sys/stat.h> |
38 | #include <sys/time.h> | |
39 | #include <sys/resource.h> | |
9479aa87 | 40 | #include <sys/file.h> |
2d4a74b8 | 41 | #include <sgtty.h> |
3b8dd95e | 42 | |
88a01c09 BJ |
43 | #include <utmp.h> |
44 | #include <signal.h> | |
22d4760e | 45 | #include <errno.h> |
9479aa87 BJ |
46 | #include <ttyent.h> |
47 | #include <syslog.h> | |
c89291e2 | 48 | #include <grp.h> |
80f91e3f | 49 | #include <pwd.h> |
ede75793 | 50 | #include <setjmp.h> |
80f91e3f KB |
51 | #include <stdio.h> |
52 | #include <strings.h> | |
0e08a2b3 | 53 | #include <tzfile.h> |
fb6e7f7e | 54 | #include "pathnames.h" |
c89291e2 | 55 | |
80f91e3f | 56 | #define TTYGRPNAME "tty" /* name of group to own ttys */ |
88a01c09 | 57 | |
3b8dd95e | 58 | /* |
80f91e3f KB |
59 | * This bounds the time given to login. Not a define so it can |
60 | * be patched on machines where it's too small. | |
3b8dd95e | 61 | */ |
a9b031fe | 62 | int timeout = 300; |
86eb6c9e | 63 | |
659be7fb MK |
64 | struct passwd *pwd; |
65 | int failures; | |
66 | char term[64], *hostname, *username, *tty; | |
88a01c09 | 67 | |
659be7fb MK |
68 | struct sgttyb sgttyb; |
69 | struct tchars tc = { | |
714accc5 SL |
70 | CINTR, CQUIT, CSTART, CSTOP, CEOT, CBRK |
71 | }; | |
659be7fb | 72 | struct ltchars ltc = { |
714accc5 | 73 | CSUSP, CDSUSP, CRPRNT, CFLUSH, CWERASE, CLNEXT |
841d84b0 BJ |
74 | }; |
75 | ||
83cc7253 KB |
76 | char *months[] = |
77 | { "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", | |
78 | "Sep", "Oct", "Nov", "Dec" }; | |
79 | ||
c91c86eb KB |
80 | char *months[] = |
81 | { "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", | |
82 | "Sep", "Oct", "Nov", "Dec" }; | |
83 | ||
88a01c09 | 84 | main(argc, argv) |
80f91e3f KB |
85 | int argc; |
86 | char **argv; | |
88a01c09 | 87 | { |
80f91e3f KB |
88 | extern int errno, optind; |
89 | extern char *optarg, **environ; | |
c91c86eb KB |
90 | struct timeval tp; |
91 | struct tm *ttp; | |
83cc7253 KB |
92 | struct timeval tp; |
93 | struct tm *ttp; | |
80f91e3f KB |
94 | struct group *gr; |
95 | register int ch; | |
659be7fb | 96 | register char *p; |
d0faf133 | 97 | int ask, fflag, hflag, pflag, rflag, cnt; |
80f91e3f | 98 | int quietlog, passwd_req, ioctlval, timedout(); |
659be7fb | 99 | char *domain, *salt, *envinit[1], *ttyn, *pp; |
a339b173 | 100 | char tbuf[MAXPATHLEN + 2], tname[sizeof(_PATH_TTY) + 10]; |
e2a7a526 | 101 | char localhost[MAXHOSTNAMELEN]; |
c91c86eb | 102 | char *ctime(), *ttyname(), *stypeof(), *crypt(), *getpass(); |
80f91e3f KB |
103 | time_t time(); |
104 | off_t lseek(); | |
105 | ||
106 | (void)signal(SIGALRM, timedout); | |
107 | (void)alarm((u_int)timeout); | |
108 | (void)signal(SIGQUIT, SIG_IGN); | |
109 | (void)signal(SIGINT, SIG_IGN); | |
110 | (void)setpriority(PRIO_PROCESS, 0, 0); | |
111 | (void)quota(Q_SETUID, 0, 0, 0); | |
112 | ||
3b8dd95e | 113 | /* |
d3737d51 | 114 | * -p is used by getty to tell login not to destroy the environment |
d0faf133 | 115 | * -r is used by rlogind to cause the autologin protocol; |
5dbe2745 | 116 | * -f is used to skip a second login authentication |
ee1eff74 MK |
117 | * -h is used by other servers to pass the name of the remote |
118 | * host to login so that it may be placed in utmp and wtmp | |
3b8dd95e | 119 | */ |
e2a7a526 KF |
120 | domain = NULL; |
121 | if (gethostname(localhost, sizeof(localhost)) < 0) | |
122 | syslog(LOG_ERR, "couldn't get local hostname: %m"); | |
123 | else | |
124 | domain = index(localhost, '.'); | |
80f91e3f | 125 | |
2d4a74b8 KF |
126 | openlog("login", LOG_ODELAY, LOG_AUTH); |
127 | ||
d0faf133 | 128 | fflag = hflag = pflag = rflag = 0; |
80f91e3f | 129 | passwd_req = 1; |
2d4a74b8 | 130 | uid = getuid(); |
d0faf133 | 131 | while ((ch = getopt(argc, argv, "fh:pr:")) != EOF) |
ede75793 | 132 | switch (ch) { |
80f91e3f | 133 | case 'f': |
d0faf133 KB |
134 | if (rflag) { |
135 | fprintf(stderr, | |
136 | "login: only one of -r and -f allowed.\n"); | |
137 | exit(1); | |
138 | } | |
80f91e3f | 139 | fflag = 1; |
80f91e3f KB |
140 | break; |
141 | case 'h': | |
2d4a74b8 | 142 | if (uid) { |
0e08a2b3 | 143 | (void)fprintf(stderr, |
80f91e3f | 144 | "login: -h for super-user only.\n"); |
b6f7cade | 145 | exit(1); |
5dbe2745 | 146 | } |
d0faf133 KB |
147 | if (rflag) { |
148 | fprintf(stderr, | |
149 | "login: only one of -r and -h allowed.\n"); | |
150 | exit(1); | |
151 | } | |
80f91e3f KB |
152 | hflag = 1; |
153 | if (domain && (p = index(optarg, '.')) && | |
abc4056e | 154 | strcasecmp(p, domain) == 0) |
80f91e3f KB |
155 | *p = 0; |
156 | hostname = optarg; | |
157 | break; | |
158 | case 'p': | |
d3737d51 | 159 | pflag = 1; |
80f91e3f | 160 | break; |
d0faf133 KB |
161 | case 'r': |
162 | if (hflag || fflag) { | |
163 | fprintf(stderr, | |
164 | "login: -f and -h not allowed with -r.\n"); | |
165 | exit(1); | |
166 | } | |
167 | if (getuid()) { | |
168 | fprintf(stderr, | |
169 | "login: -r for super-user only.\n"); | |
170 | exit(1); | |
171 | } | |
172 | /* "-r hostname" must be last args */ | |
173 | if (optind != argc) { | |
174 | fprintf(stderr, "Syntax error.\n"); | |
175 | exit(1); | |
176 | } | |
177 | rflag = 1; | |
178 | passwd_req = (doremotelogin(optarg) == -1); | |
179 | if (domain && (p = index(optarg, '.')) && | |
180 | !strcmp(p, domain)) | |
181 | *p = '\0'; | |
182 | hostname = optarg; | |
183 | break; | |
80f91e3f KB |
184 | case '?': |
185 | default: | |
2d4a74b8 KF |
186 | if (!uid) |
187 | syslog(LOG_ERR, "invalid flag %c", ch); | |
0e08a2b3 KB |
188 | (void)fprintf(stderr, |
189 | "usage: login [-fp] [username]\n"); | |
80f91e3f | 190 | exit(1); |
d3737d51 | 191 | } |
80f91e3f KB |
192 | argc -= optind; |
193 | argv += optind; | |
f0c0c252 | 194 | if (*argv) { |
80f91e3f | 195 | username = *argv; |
659be7fb MK |
196 | ask = 0; |
197 | } else | |
f0c0c252 | 198 | ask = 1; |
d0faf133 KB |
199 | if (rflag) |
200 | ask = 0; | |
80f91e3f KB |
201 | |
202 | ioctlval = 0; | |
203 | (void)ioctl(0, TIOCLSET, &ioctlval); | |
204 | (void)ioctl(0, TIOCNXCL, 0); | |
ede75793 KB |
205 | (void)fcntl(0, F_SETFL, ioctlval); |
206 | (void)ioctl(0, TIOCGETP, &sgttyb); | |
d0faf133 KB |
207 | |
208 | /* | |
209 | * If talking to an rlogin process, propagate the terminal type and | |
210 | * baud rate across the network. | |
211 | */ | |
212 | if (rflag) | |
213 | doremoteterm(&sgttyb); | |
ede75793 KB |
214 | sgttyb.sg_erase = CERASE; |
215 | sgttyb.sg_kill = CKILL; | |
80f91e3f KB |
216 | (void)ioctl(0, TIOCSLTC, <c); |
217 | (void)ioctl(0, TIOCSETC, &tc); | |
ede75793 | 218 | (void)ioctl(0, TIOCSETP, &sgttyb); |
80f91e3f KB |
219 | |
220 | for (cnt = getdtablesize(); cnt > 2; cnt--) | |
221 | close(cnt); | |
222 | ||
88a01c09 | 223 | ttyn = ttyname(0); |
a339b173 KB |
224 | if (ttyn == NULL || *ttyn == '\0') { |
225 | (void)sprintf(tname, "%s??", _PATH_TTY); | |
226 | ttyn = tname; | |
227 | } | |
80f91e3f KB |
228 | if (tty = rindex(ttyn, '/')) |
229 | ++tty; | |
9479aa87 | 230 | else |
80f91e3f KB |
231 | tty = ttyn; |
232 | ||
f0c0c252 | 233 | for (cnt = 0;; ask = 1) { |
7e845b92 | 234 | ioctlval = TTYDISC; |
80f91e3f KB |
235 | (void)ioctl(0, TIOCSETD, &ioctlval); |
236 | ||
f0c0c252 | 237 | if (ask) { |
ede75793 | 238 | fflag = 0; |
80f91e3f | 239 | getloginname(); |
ede75793 | 240 | } |
659be7fb | 241 | /* |
2d4a74b8 KF |
242 | * Note if trying multiple user names; log failures for |
243 | * previous user name, but don't bother logging one failure | |
659be7fb MK |
244 | * for nonexistent name (mistyped username). |
245 | */ | |
246 | if (failures && strcmp(tbuf, username)) { | |
247 | if (failures > (pwd ? 0 : 1)) | |
f0c0c252 | 248 | badlogin(tbuf); |
659be7fb | 249 | failures = 0; |
f0c0c252 | 250 | } |
659be7fb | 251 | (void)strcpy(tbuf, username); |
ede75793 KB |
252 | if (pwd = getpwnam(username)) |
253 | salt = pwd->pw_passwd; | |
254 | else | |
255 | salt = "xx"; | |
80f91e3f KB |
256 | |
257 | /* if user not super-user, check for disabled logins */ | |
ede75793 | 258 | if (pwd == NULL || pwd->pw_uid) |
80f91e3f KB |
259 | checknologin(); |
260 | ||
3b8dd95e | 261 | /* |
ede75793 KB |
262 | * Disallow automatic login to root; if not invoked by |
263 | * root, disallow if the uid's differ. | |
3b8dd95e | 264 | */ |
ede75793 | 265 | if (fflag && pwd) { |
b32e4ad7 KF |
266 | passwd_req = |
267 | #ifndef KERBEROS | |
268 | pwd->pw_uid == 0 || | |
269 | #endif | |
ede75793 | 270 | (uid && uid != pwd->pw_uid); |
f570e1ff | 271 | } |
80f91e3f | 272 | |
3b8dd95e | 273 | /* |
ee1eff74 | 274 | * If no pre-authentication and a password exists |
80f91e3f | 275 | * for this user, prompt for one and verify it. |
3b8dd95e | 276 | */ |
9d6a5a69 | 277 | if (!passwd_req || (pwd && !*pwd->pw_passwd)) |
80f91e3f KB |
278 | break; |
279 | ||
2d4a74b8 KF |
280 | /* |
281 | * If trying to log in as root, but with insecure terminal, | |
282 | * refuse the login attempt. | |
283 | */ | |
284 | if (pwd->pw_uid == 0 && !rootterm(tty)) { | |
285 | (void)fprintf(stderr, | |
286 | "%s login refused on this terminal.\n", | |
287 | pwd->pw_name); | |
288 | if (hostname) | |
289 | syslog(LOG_NOTICE, | |
290 | "LOGIN %s REFUSED FROM %s ON TTY %s", | |
291 | pwd->pw_name, hostname, tty); | |
292 | else | |
293 | syslog(LOG_NOTICE, | |
294 | "LOGIN %s REFUSED ON TTY %s", | |
295 | pwd->pw_name, tty); | |
296 | continue; | |
297 | } | |
298 | ||
80f91e3f | 299 | setpriority(PRIO_PROCESS, 0, -4); |
9d6a5a69 KF |
300 | pp = getpass("Password:"); |
301 | p = crypt(pp, salt); | |
80f91e3f | 302 | setpriority(PRIO_PROCESS, 0, 0); |
9d6a5a69 | 303 | |
9d6a5a69 | 304 | (void) bzero(pp, strlen(pp)); |
ede75793 | 305 | if (pwd && !strcmp(p, pwd->pw_passwd)) |
80f91e3f KB |
306 | break; |
307 | ||
0e08a2b3 | 308 | (void)printf("Login incorrect\n"); |
659be7fb | 309 | failures++; |
f0c0c252 KB |
310 | /* we allow 10 tries, but after 3 we start backing off */ |
311 | if (++cnt > 3) { | |
312 | if (cnt >= 10) { | |
313 | badlogin(username); | |
314 | (void)ioctl(0, TIOCHPCL, (struct sgttyb *)NULL); | |
315 | sleepexit(1); | |
316 | } | |
317 | sleep((u_int)((cnt - 3) * 5)); | |
f570e1ff | 318 | } |
80f91e3f | 319 | } |
88a01c09 | 320 | |
80f91e3f KB |
321 | /* committed to login -- turn off timeout */ |
322 | (void)alarm((u_int)0); | |
323 | ||
a339b173 KB |
324 | /* paranoia... */ |
325 | endpwent(); | |
326 | ||
80f91e3f KB |
327 | if (quota(Q_SETUID, pwd->pw_uid, 0, 0) < 0 && errno != EINVAL) { |
328 | switch(errno) { | |
329 | case EUSERS: | |
0e08a2b3 | 330 | (void)fprintf(stderr, |
80f91e3f KB |
331 | "Too many users logged on already.\nTry again later.\n"); |
332 | break; | |
333 | case EPROCLIM: | |
0e08a2b3 | 334 | (void)fprintf(stderr, |
80f91e3f KB |
335 | "You have too many processes running.\n"); |
336 | break; | |
337 | default: | |
338 | perror("quota (Q_SETUID)"); | |
f570e1ff | 339 | } |
80f91e3f KB |
340 | sleepexit(0); |
341 | } | |
342 | ||
ede75793 | 343 | if (chdir(pwd->pw_dir) < 0) { |
0e08a2b3 | 344 | (void)printf("No directory %s!\n", pwd->pw_dir); |
ede75793 KB |
345 | if (chdir("/")) |
346 | exit(0); | |
347 | pwd->pw_dir = "/"; | |
0e08a2b3 | 348 | (void)printf("Logging in with home = \"/\".\n"); |
ede75793 KB |
349 | } |
350 | ||
83cc7253 KB |
351 | #define TWOWEEKS (14*24*60*60) |
352 | if (pwd->pw_change || pwd->pw_expire) | |
353 | (void)gettimeofday(&tp, (struct timezone *)NULL); | |
354 | if (pwd->pw_change) | |
355 | if (tp.tv_sec >= pwd->pw_change) { | |
356 | printf("Sorry -- your password has expired.\n"); | |
357 | sleepexit(1); | |
358 | } | |
359 | else if (tp.tv_sec - pwd->pw_change < TWOWEEKS) { | |
360 | ttp = localtime(&pwd->pw_change); | |
361 | printf("Warning: your password expires on %s %d, 19%d\n", | |
362 | months[ttp->tm_mon], ttp->tm_mday, ttp->tm_year); | |
363 | } | |
364 | if (pwd->pw_expire) | |
365 | if (tp.tv_sec >= pwd->pw_expire) { | |
366 | printf("Sorry -- your account has expired.\n"); | |
367 | sleepexit(1); | |
368 | } | |
369 | else if (tp.tv_sec - pwd->pw_expire < TWOWEEKS) { | |
370 | ttp = localtime(&pwd->pw_expire); | |
371 | printf("Warning: your account expires on %s %d, 19%d\n", | |
372 | months[ttp->tm_mon], ttp->tm_mday, ttp->tm_year); | |
373 | } | |
374 | ||
c91c86eb KB |
375 | if (pwd->pw_change || pwd->pw_expire) |
376 | (void)gettimeofday(&tp, (struct timezone *)NULL); | |
377 | if (pwd->pw_change) | |
378 | if (tp.tv_sec >= pwd->pw_change) { | |
0e08a2b3 | 379 | (void)printf("Sorry -- your password has expired.\n"); |
c91c86eb KB |
380 | sleepexit(1); |
381 | } | |
50112e48 KB |
382 | else if (pwd->pw_change - tp.tv_sec < |
383 | 2 * DAYSPERWEEK * SECSPERDAY && !quietlog) { | |
c91c86eb | 384 | ttp = localtime(&pwd->pw_change); |
0e08a2b3 | 385 | (void)printf("Warning: your password expires on %s %d, %d\n", |
50112e48 KB |
386 | months[ttp->tm_mon], ttp->tm_mday, |
387 | TM_YEAR_BASE + ttp->tm_year); | |
c91c86eb KB |
388 | } |
389 | if (pwd->pw_expire) | |
390 | if (tp.tv_sec >= pwd->pw_expire) { | |
0e08a2b3 | 391 | (void)printf("Sorry -- your account has expired.\n"); |
c91c86eb KB |
392 | sleepexit(1); |
393 | } | |
50112e48 KB |
394 | else if (pwd->pw_expire - tp.tv_sec < |
395 | 2 * DAYSPERWEEK * SECSPERDAY && !quietlog) { | |
c91c86eb | 396 | ttp = localtime(&pwd->pw_expire); |
0e08a2b3 | 397 | (void)printf("Warning: your account expires on %s %d, %d\n", |
50112e48 KB |
398 | months[ttp->tm_mon], ttp->tm_mday, |
399 | TM_YEAR_BASE + ttp->tm_year); | |
c91c86eb KB |
400 | } |
401 | ||
ede75793 | 402 | /* nothing else left to fail -- really log in */ |
80f91e3f KB |
403 | { |
404 | struct utmp utmp; | |
405 | ||
659be7fb | 406 | bzero((char *)&utmp, sizeof(utmp)); |
80f91e3f KB |
407 | (void)time(&utmp.ut_time); |
408 | strncpy(utmp.ut_name, username, sizeof(utmp.ut_name)); | |
a829b33b KB |
409 | if (hostname) |
410 | strncpy(utmp.ut_host, hostname, sizeof(utmp.ut_host)); | |
80f91e3f KB |
411 | strncpy(utmp.ut_line, tty, sizeof(utmp.ut_line)); |
412 | login(&utmp); | |
f570e1ff | 413 | } |
80f91e3f | 414 | |
f0c0c252 | 415 | dolastlog(quietlog); |
80f91e3f | 416 | |
d0faf133 | 417 | if (!hflag && !rflag) { /* XXX */ |
80f91e3f KB |
418 | static struct winsize win = { 0, 0, 0, 0 }; |
419 | ||
420 | (void)ioctl(0, TIOCSWINSZ, &win); | |
421 | } | |
422 | ||
423 | (void)chown(ttyn, pwd->pw_uid, | |
424 | (gr = getgrnam(TTYGRPNAME)) ? gr->gr_gid : pwd->pw_gid); | |
425 | (void)chmod(ttyn, 0620); | |
426 | (void)setgid(pwd->pw_gid); | |
427 | ||
428 | initgroups(username, pwd->pw_gid); | |
429 | ||
22d4760e | 430 | quota(Q_DOWARN, pwd->pw_uid, (dev_t)-1, 0); |
3daca631 | 431 | |
ede75793 | 432 | if (*pwd->pw_shell == '\0') |
fb6e7f7e | 433 | pwd->pw_shell = _PATH_BSHELL; |
ede75793 | 434 | |
80f91e3f | 435 | /* destroy environment unless user has requested preservation */ |
d3737d51 SL |
436 | if (!pflag) |
437 | environ = envinit; | |
ede75793 KB |
438 | (void)setenv("HOME", pwd->pw_dir, 1); |
439 | (void)setenv("SHELL", pwd->pw_shell, 1); | |
d3737d51 | 440 | if (term[0] == '\0') |
659be7fb | 441 | strncpy(term, stypeof(tty), sizeof(term)); |
ede75793 KB |
442 | (void)setenv("TERM", term, 0); |
443 | (void)setenv("USER", pwd->pw_name, 1); | |
c502712b | 444 | (void)setenv("PATH", _PATH_DEFPATH, 0); |
d3737d51 | 445 | |
9479aa87 | 446 | if (tty[sizeof("tty")-1] == 'd') |
d3737d51 SL |
447 | syslog(LOG_INFO, "DIALUP %s, %s", tty, pwd->pw_name); |
448 | if (pwd->pw_uid == 0) | |
80f91e3f | 449 | if (hostname) |
659be7fb | 450 | syslog(LOG_NOTICE, "ROOT LOGIN ON %s FROM %s", |
f0c0c252 | 451 | tty, hostname); |
df9d9536 | 452 | else |
659be7fb | 453 | syslog(LOG_NOTICE, "ROOT LOGIN ON %s", tty); |
80f91e3f | 454 | |
4f8d3876 | 455 | if (!quietlog) { |
6821e9c5 | 456 | struct stat st; |
d3737d51 | 457 | |
80f91e3f | 458 | motd(); |
fb6e7f7e | 459 | (void)sprintf(tbuf, "%s/%s", _PATH_MAILDIR, pwd->pw_name); |
80f91e3f | 460 | if (stat(tbuf, &st) == 0 && st.st_size != 0) |
0e08a2b3 | 461 | (void)printf("You have %smail.\n", |
80f91e3f | 462 | (st.st_mtime > st.st_atime) ? "new " : ""); |
f570e1ff | 463 | } |
80f91e3f KB |
464 | |
465 | (void)signal(SIGALRM, SIG_DFL); | |
466 | (void)signal(SIGQUIT, SIG_DFL); | |
467 | (void)signal(SIGINT, SIG_DFL); | |
468 | (void)signal(SIGTSTP, SIG_IGN); | |
469 | ||
470 | tbuf[0] = '-'; | |
471 | strcpy(tbuf + 1, (p = rindex(pwd->pw_shell, '/')) ? | |
472 | p + 1 : pwd->pw_shell); | |
0e08a2b3 | 473 | |
3d28f6dd KS |
474 | if (setlogin(pwd->pw_name) < 0) |
475 | syslog(LOG_ERR, "setlogin() failure: %m"); | |
a339b173 | 476 | |
0e08a2b3 KB |
477 | /* discard permissions last so can't get killed and drop core */ |
478 | (void)setuid(pwd->pw_uid); | |
479 | ||
80f91e3f | 480 | execlp(pwd->pw_shell, tbuf, 0); |
0e08a2b3 | 481 | (void)fprintf(stderr, "login: no shell: %s.\n", strerror(errno)); |
88a01c09 BJ |
482 | exit(0); |
483 | } | |
484 | ||
80f91e3f | 485 | getloginname() |
3b8dd95e | 486 | { |
80f91e3f KB |
487 | register int ch; |
488 | register char *p; | |
489 | static char nbuf[UT_NAMESIZE + 1]; | |
3b8dd95e | 490 | |
80f91e3f | 491 | for (;;) { |
0e08a2b3 | 492 | (void)printf("login: "); |
ede75793 | 493 | for (p = nbuf; (ch = getchar()) != '\n'; ) { |
f0c0c252 KB |
494 | if (ch == EOF) { |
495 | badlogin(username); | |
3b8dd95e | 496 | exit(0); |
f0c0c252 | 497 | } |
ede75793 | 498 | if (p < nbuf + UT_NAMESIZE) |
80f91e3f | 499 | *p++ = ch; |
3b8dd95e | 500 | } |
80f91e3f KB |
501 | if (p > nbuf) |
502 | if (nbuf[0] == '-') | |
0e08a2b3 | 503 | (void)fprintf(stderr, |
80f91e3f KB |
504 | "login names may not start with '-'.\n"); |
505 | else { | |
506 | *p = '\0'; | |
507 | username = nbuf; | |
ede75793 | 508 | break; |
80f91e3f | 509 | } |
3b8dd95e | 510 | } |
3b8dd95e SL |
511 | } |
512 | ||
513 | timedout() | |
514 | { | |
0e08a2b3 | 515 | (void)fprintf(stderr, "Login timed out after %d seconds\n", timeout); |
3b8dd95e SL |
516 | exit(0); |
517 | } | |
518 | ||
659be7fb MK |
519 | rootterm(ttyn) |
520 | char *ttyn; | |
88a01c09 | 521 | { |
80f91e3f | 522 | struct ttyent *t; |
1886582e | 523 | |
659be7fb | 524 | return((t = getttynam(ttyn)) && t->ty_status&TTY_SECURE); |
88a01c09 BJ |
525 | } |
526 | ||
ede75793 KB |
527 | jmp_buf motdinterrupt; |
528 | ||
80f91e3f | 529 | motd() |
f570e1ff | 530 | { |
ede75793 | 531 | register int fd, nchars; |
b32e4ad7 KF |
532 | sig_t oldint; |
533 | int sigint(); | |
ede75793 | 534 | char tbuf[8192]; |
80f91e3f | 535 | |
fb6e7f7e | 536 | if ((fd = open(_PATH_MOTDFILE, O_RDONLY, 0)) < 0) |
80f91e3f KB |
537 | return; |
538 | oldint = signal(SIGINT, sigint); | |
ede75793 KB |
539 | if (setjmp(motdinterrupt) == 0) |
540 | while ((nchars = read(fd, tbuf, sizeof(tbuf))) > 0) | |
541 | (void)write(fileno(stdout), tbuf, nchars); | |
80f91e3f | 542 | (void)signal(SIGINT, oldint); |
ede75793 | 543 | (void)close(fd); |
80f91e3f | 544 | } |
9479aa87 | 545 | |
80f91e3f KB |
546 | sigint() |
547 | { | |
ede75793 | 548 | longjmp(motdinterrupt, 1); |
80f91e3f KB |
549 | } |
550 | ||
551 | checknologin() | |
552 | { | |
553 | register int fd, nchars; | |
ede75793 | 554 | char tbuf[8192]; |
80f91e3f | 555 | |
fb6e7f7e | 556 | if ((fd = open(_PATH_NOLOGIN, O_RDONLY, 0)) >= 0) { |
80f91e3f KB |
557 | while ((nchars = read(fd, tbuf, sizeof(tbuf))) > 0) |
558 | (void)write(fileno(stdout), tbuf, nchars); | |
559 | sleepexit(0); | |
f570e1ff | 560 | } |
f570e1ff BJ |
561 | } |
562 | ||
f0c0c252 | 563 | dolastlog(quiet) |
80f91e3f | 564 | int quiet; |
88a01c09 | 565 | { |
80f91e3f KB |
566 | struct lastlog ll; |
567 | int fd; | |
c91c86eb | 568 | char *ctime(); |
83cc7253 | 569 | char *ctime(); |
80f91e3f | 570 | |
fb6e7f7e | 571 | if ((fd = open(_PATH_LASTLOG, O_RDWR, 0)) >= 0) { |
ede75793 | 572 | (void)lseek(fd, (off_t)pwd->pw_uid * sizeof(ll), L_SET); |
80f91e3f KB |
573 | if (!quiet) { |
574 | if (read(fd, (char *)&ll, sizeof(ll)) == sizeof(ll) && | |
575 | ll.ll_time != 0) { | |
0e08a2b3 | 576 | (void)printf("Last login: %.*s ", |
80f91e3f KB |
577 | 24-5, (char *)ctime(&ll.ll_time)); |
578 | if (*ll.ll_host != '\0') | |
0e08a2b3 | 579 | (void)printf("from %.*s\n", |
80f91e3f KB |
580 | sizeof(ll.ll_host), ll.ll_host); |
581 | else | |
0e08a2b3 | 582 | (void)printf("on %.*s\n", |
80f91e3f KB |
583 | sizeof(ll.ll_line), ll.ll_line); |
584 | } | |
ede75793 | 585 | (void)lseek(fd, (off_t)pwd->pw_uid * sizeof(ll), L_SET); |
80f91e3f | 586 | } |
659be7fb | 587 | bzero((char *)&ll, sizeof(ll)); |
80f91e3f KB |
588 | (void)time(&ll.ll_time); |
589 | strncpy(ll.ll_line, tty, sizeof(ll.ll_line)); | |
a829b33b KB |
590 | if (hostname) |
591 | strncpy(ll.ll_host, hostname, sizeof(ll.ll_host)); | |
80f91e3f KB |
592 | (void)write(fd, (char *)&ll, sizeof(ll)); |
593 | (void)close(fd); | |
88a01c09 | 594 | } |
88a01c09 BJ |
595 | } |
596 | ||
f0c0c252 KB |
597 | badlogin(name) |
598 | char *name; | |
599 | { | |
659be7fb | 600 | if (failures == 0) |
f0c0c252 KB |
601 | return; |
602 | if (hostname) | |
659be7fb MK |
603 | syslog(LOG_NOTICE, "%d LOGIN FAILURE%s FROM %s, %s", |
604 | failures, failures > 1 ? "S" : "", hostname, name); | |
f0c0c252 | 605 | else |
659be7fb MK |
606 | syslog(LOG_NOTICE, "%d LOGIN FAILURE%s ON %s, %s", |
607 | failures, failures > 1 ? "S" : "", tty, name); | |
f0c0c252 KB |
608 | } |
609 | ||
f570e1ff | 610 | #undef UNKNOWN |
80f91e3f | 611 | #define UNKNOWN "su" |
88a01c09 BJ |
612 | |
613 | char * | |
659be7fb MK |
614 | stypeof(ttyid) |
615 | char *ttyid; | |
88a01c09 | 616 | { |
80f91e3f | 617 | struct ttyent *t; |
88a01c09 | 618 | |
659be7fb | 619 | return(ttyid && (t = getttynam(ttyid)) ? t->ty_type : UNKNOWN); |
88a01c09 | 620 | } |
86eb6c9e BJ |
621 | |
622 | getstr(buf, cnt, err) | |
80f91e3f | 623 | char *buf, *err; |
86eb6c9e | 624 | int cnt; |
86eb6c9e | 625 | { |
80f91e3f | 626 | char ch; |
86eb6c9e BJ |
627 | |
628 | do { | |
80f91e3f | 629 | if (read(0, &ch, sizeof(ch)) != sizeof(ch)) |
86eb6c9e BJ |
630 | exit(1); |
631 | if (--cnt < 0) { | |
0e08a2b3 | 632 | (void)fprintf(stderr, "%s too long\r\n", err); |
80f91e3f | 633 | sleepexit(1); |
86eb6c9e | 634 | } |
80f91e3f KB |
635 | *buf++ = ch; |
636 | } while (ch); | |
86eb6c9e | 637 | } |
4f8d3876 | 638 | |
80f91e3f KB |
639 | sleepexit(eval) |
640 | int eval; | |
c89291e2 | 641 | { |
80f91e3f KB |
642 | sleep((u_int)5); |
643 | exit(eval); | |
c89291e2 | 644 | } |
d0faf133 KB |
645 | |
646 | doremotelogin(host) | |
647 | char *host; | |
648 | { | |
649 | static char lusername[UT_NAMESIZE+1]; | |
650 | char rusername[UT_NAMESIZE+1]; | |
651 | ||
652 | getstr(rusername, sizeof(rusername), "remuser"); | |
653 | getstr(lusername, sizeof(lusername), "locuser"); | |
654 | getstr(term, sizeof(term), "Terminal type"); | |
655 | username = lusername; | |
656 | pwd = getpwnam(username); | |
657 | if (pwd == NULL) | |
658 | return(-1); | |
659 | return(ruserok(host, (pwd->pw_uid == 0), rusername, username)); | |
660 | } | |
661 | ||
662 | char *speeds[] = { | |
663 | "0", "50", "75", "110", "134", "150", "200", "300", "600", | |
664 | "1200", "1800", "2400", "4800", "9600", "19200", "38400", | |
665 | }; | |
666 | #define NSPEEDS (sizeof(speeds) / sizeof(speeds[0])) | |
667 | ||
668 | doremoteterm(tp) | |
669 | struct sgttyb *tp; | |
670 | { | |
671 | register char *cp = index(term, '/'), **cpp; | |
672 | char *speed; | |
673 | ||
674 | if (cp) { | |
675 | *cp++ = '\0'; | |
676 | speed = cp; | |
677 | cp = index(speed, '/'); | |
678 | if (cp) | |
679 | *cp++ = '\0'; | |
680 | for (cpp = speeds; cpp < &speeds[NSPEEDS]; cpp++) | |
681 | if (strcmp(*cpp, speed) == 0) { | |
682 | tp->sg_ispeed = tp->sg_ospeed = cpp-speeds; | |
683 | break; | |
684 | } | |
685 | } | |
686 | tp->sg_flags = ECHO|CRMOD|ANYP|XTABS; | |
687 | } |