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 |
9e76b9f1 | 25 | static char sccsid[] = "@(#)login.c 5.55 (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> |
3b8dd95e SL |
36 | #include <sys/stat.h> |
37 | #include <sys/time.h> | |
38 | #include <sys/resource.h> | |
9479aa87 | 39 | #include <sys/file.h> |
2d4a74b8 | 40 | #include <sgtty.h> |
3b8dd95e | 41 | |
88a01c09 BJ |
42 | #include <utmp.h> |
43 | #include <signal.h> | |
22d4760e | 44 | #include <errno.h> |
9479aa87 BJ |
45 | #include <ttyent.h> |
46 | #include <syslog.h> | |
c89291e2 | 47 | #include <grp.h> |
80f91e3f | 48 | #include <pwd.h> |
ede75793 | 49 | #include <setjmp.h> |
80f91e3f | 50 | #include <stdio.h> |
38dde0cd | 51 | #include <string.h> |
0e08a2b3 | 52 | #include <tzfile.h> |
fb6e7f7e | 53 | #include "pathnames.h" |
c89291e2 | 54 | |
80f91e3f | 55 | #define TTYGRPNAME "tty" /* name of group to own ttys */ |
88a01c09 | 56 | |
3b8dd95e | 57 | /* |
80f91e3f KB |
58 | * This bounds the time given to login. Not a define so it can |
59 | * be patched on machines where it's too small. | |
3b8dd95e | 60 | */ |
a9b031fe | 61 | int timeout = 300; |
86eb6c9e | 62 | |
659be7fb MK |
63 | struct passwd *pwd; |
64 | int failures; | |
657e5a3c | 65 | char term[64], *envinit[1], *hostname, *username, *tty; |
88a01c09 | 66 | |
659be7fb MK |
67 | struct sgttyb sgttyb; |
68 | struct tchars tc = { | |
714accc5 SL |
69 | CINTR, CQUIT, CSTART, CSTOP, CEOT, CBRK |
70 | }; | |
659be7fb | 71 | struct ltchars ltc = { |
714accc5 | 72 | CSUSP, CDSUSP, CRPRNT, CFLUSH, CWERASE, CLNEXT |
841d84b0 BJ |
73 | }; |
74 | ||
83cc7253 KB |
75 | char *months[] = |
76 | { "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", | |
77 | "Sep", "Oct", "Nov", "Dec" }; | |
78 | ||
c91c86eb KB |
79 | char *months[] = |
80 | { "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", | |
81 | "Sep", "Oct", "Nov", "Dec" }; | |
82 | ||
88a01c09 | 83 | main(argc, argv) |
80f91e3f KB |
84 | int argc; |
85 | char **argv; | |
88a01c09 | 86 | { |
80f91e3f KB |
87 | extern int errno, optind; |
88 | extern char *optarg, **environ; | |
c91c86eb KB |
89 | struct timeval tp; |
90 | struct tm *ttp; | |
83cc7253 KB |
91 | struct timeval tp; |
92 | struct tm *ttp; | |
80f91e3f KB |
93 | struct group *gr; |
94 | register int ch; | |
659be7fb | 95 | register char *p; |
d0faf133 | 96 | int ask, fflag, hflag, pflag, rflag, cnt; |
80f91e3f | 97 | int quietlog, passwd_req, ioctlval, timedout(); |
657e5a3c | 98 | char *domain, *salt, *ttyn, *pp; |
a339b173 | 99 | char tbuf[MAXPATHLEN + 2], tname[sizeof(_PATH_TTY) + 10]; |
e2a7a526 | 100 | char localhost[MAXHOSTNAMELEN]; |
c91c86eb | 101 | char *ctime(), *ttyname(), *stypeof(), *crypt(), *getpass(); |
80f91e3f KB |
102 | time_t time(); |
103 | off_t lseek(); | |
104 | ||
105 | (void)signal(SIGALRM, timedout); | |
106 | (void)alarm((u_int)timeout); | |
107 | (void)signal(SIGQUIT, SIG_IGN); | |
108 | (void)signal(SIGINT, SIG_IGN); | |
109 | (void)setpriority(PRIO_PROCESS, 0, 0); | |
80f91e3f | 110 | |
9e76b9f1 KB |
111 | openlog("login", LOG_ODELAY, LOG_AUTH); |
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 | |
d0faf133 | 126 | fflag = hflag = pflag = rflag = 0; |
80f91e3f | 127 | passwd_req = 1; |
2d4a74b8 | 128 | uid = getuid(); |
d0faf133 | 129 | while ((ch = getopt(argc, argv, "fh:pr:")) != EOF) |
ede75793 | 130 | switch (ch) { |
80f91e3f | 131 | case 'f': |
d0faf133 KB |
132 | if (rflag) { |
133 | fprintf(stderr, | |
134 | "login: only one of -r and -f allowed.\n"); | |
135 | exit(1); | |
136 | } | |
80f91e3f | 137 | fflag = 1; |
80f91e3f KB |
138 | break; |
139 | case 'h': | |
2d4a74b8 | 140 | if (uid) { |
0e08a2b3 | 141 | (void)fprintf(stderr, |
80f91e3f | 142 | "login: -h for super-user only.\n"); |
b6f7cade | 143 | exit(1); |
5dbe2745 | 144 | } |
d0faf133 KB |
145 | if (rflag) { |
146 | fprintf(stderr, | |
147 | "login: only one of -r and -h allowed.\n"); | |
148 | exit(1); | |
149 | } | |
80f91e3f KB |
150 | hflag = 1; |
151 | if (domain && (p = index(optarg, '.')) && | |
abc4056e | 152 | strcasecmp(p, domain) == 0) |
80f91e3f KB |
153 | *p = 0; |
154 | hostname = optarg; | |
155 | break; | |
156 | case 'p': | |
d3737d51 | 157 | pflag = 1; |
80f91e3f | 158 | break; |
d0faf133 KB |
159 | case 'r': |
160 | if (hflag || fflag) { | |
161 | fprintf(stderr, | |
162 | "login: -f and -h not allowed with -r.\n"); | |
163 | exit(1); | |
164 | } | |
165 | if (getuid()) { | |
166 | fprintf(stderr, | |
167 | "login: -r for super-user only.\n"); | |
168 | exit(1); | |
169 | } | |
170 | /* "-r hostname" must be last args */ | |
171 | if (optind != argc) { | |
172 | fprintf(stderr, "Syntax error.\n"); | |
173 | exit(1); | |
174 | } | |
175 | rflag = 1; | |
176 | passwd_req = (doremotelogin(optarg) == -1); | |
177 | if (domain && (p = index(optarg, '.')) && | |
178 | !strcmp(p, domain)) | |
179 | *p = '\0'; | |
180 | hostname = optarg; | |
181 | break; | |
80f91e3f KB |
182 | case '?': |
183 | default: | |
2d4a74b8 KF |
184 | if (!uid) |
185 | syslog(LOG_ERR, "invalid flag %c", ch); | |
0e08a2b3 KB |
186 | (void)fprintf(stderr, |
187 | "usage: login [-fp] [username]\n"); | |
80f91e3f | 188 | exit(1); |
d3737d51 | 189 | } |
80f91e3f KB |
190 | argc -= optind; |
191 | argv += optind; | |
f0c0c252 | 192 | if (*argv) { |
80f91e3f | 193 | username = *argv; |
659be7fb MK |
194 | ask = 0; |
195 | } else | |
f0c0c252 | 196 | ask = 1; |
d0faf133 KB |
197 | if (rflag) |
198 | ask = 0; | |
80f91e3f KB |
199 | |
200 | ioctlval = 0; | |
201 | (void)ioctl(0, TIOCLSET, &ioctlval); | |
202 | (void)ioctl(0, TIOCNXCL, 0); | |
ede75793 KB |
203 | (void)fcntl(0, F_SETFL, ioctlval); |
204 | (void)ioctl(0, TIOCGETP, &sgttyb); | |
d0faf133 KB |
205 | |
206 | /* | |
207 | * If talking to an rlogin process, propagate the terminal type and | |
208 | * baud rate across the network. | |
209 | */ | |
210 | if (rflag) | |
211 | doremoteterm(&sgttyb); | |
ede75793 KB |
212 | sgttyb.sg_erase = CERASE; |
213 | sgttyb.sg_kill = CKILL; | |
80f91e3f KB |
214 | (void)ioctl(0, TIOCSLTC, <c); |
215 | (void)ioctl(0, TIOCSETC, &tc); | |
ede75793 | 216 | (void)ioctl(0, TIOCSETP, &sgttyb); |
80f91e3f KB |
217 | |
218 | for (cnt = getdtablesize(); cnt > 2; cnt--) | |
219 | close(cnt); | |
220 | ||
88a01c09 | 221 | ttyn = ttyname(0); |
a339b173 KB |
222 | if (ttyn == NULL || *ttyn == '\0') { |
223 | (void)sprintf(tname, "%s??", _PATH_TTY); | |
224 | ttyn = tname; | |
225 | } | |
80f91e3f KB |
226 | if (tty = rindex(ttyn, '/')) |
227 | ++tty; | |
9479aa87 | 228 | else |
80f91e3f KB |
229 | tty = ttyn; |
230 | ||
f0c0c252 | 231 | for (cnt = 0;; ask = 1) { |
7e845b92 | 232 | ioctlval = TTYDISC; |
80f91e3f KB |
233 | (void)ioctl(0, TIOCSETD, &ioctlval); |
234 | ||
f0c0c252 | 235 | if (ask) { |
ede75793 | 236 | fflag = 0; |
80f91e3f | 237 | getloginname(); |
ede75793 | 238 | } |
659be7fb | 239 | /* |
2d4a74b8 KF |
240 | * Note if trying multiple user names; log failures for |
241 | * previous user name, but don't bother logging one failure | |
659be7fb MK |
242 | * for nonexistent name (mistyped username). |
243 | */ | |
244 | if (failures && strcmp(tbuf, username)) { | |
245 | if (failures > (pwd ? 0 : 1)) | |
f0c0c252 | 246 | badlogin(tbuf); |
659be7fb | 247 | failures = 0; |
f0c0c252 | 248 | } |
659be7fb | 249 | (void)strcpy(tbuf, username); |
ede75793 KB |
250 | if (pwd = getpwnam(username)) |
251 | salt = pwd->pw_passwd; | |
252 | else | |
253 | salt = "xx"; | |
80f91e3f KB |
254 | |
255 | /* if user not super-user, check for disabled logins */ | |
ede75793 | 256 | if (pwd == NULL || pwd->pw_uid) |
80f91e3f KB |
257 | checknologin(); |
258 | ||
3b8dd95e | 259 | /* |
ede75793 KB |
260 | * Disallow automatic login to root; if not invoked by |
261 | * root, disallow if the uid's differ. | |
3b8dd95e | 262 | */ |
ede75793 | 263 | if (fflag && pwd) { |
b32e4ad7 KF |
264 | passwd_req = |
265 | #ifndef KERBEROS | |
266 | pwd->pw_uid == 0 || | |
267 | #endif | |
ede75793 | 268 | (uid && uid != pwd->pw_uid); |
f570e1ff | 269 | } |
80f91e3f | 270 | |
3b8dd95e | 271 | /* |
ee1eff74 | 272 | * If no pre-authentication and a password exists |
80f91e3f | 273 | * for this user, prompt for one and verify it. |
3b8dd95e | 274 | */ |
9d6a5a69 | 275 | if (!passwd_req || (pwd && !*pwd->pw_passwd)) |
80f91e3f KB |
276 | break; |
277 | ||
2d4a74b8 KF |
278 | /* |
279 | * If trying to log in as root, but with insecure terminal, | |
280 | * refuse the login attempt. | |
281 | */ | |
282 | if (pwd->pw_uid == 0 && !rootterm(tty)) { | |
283 | (void)fprintf(stderr, | |
284 | "%s login refused on this terminal.\n", | |
285 | pwd->pw_name); | |
286 | if (hostname) | |
287 | syslog(LOG_NOTICE, | |
288 | "LOGIN %s REFUSED FROM %s ON TTY %s", | |
289 | pwd->pw_name, hostname, tty); | |
290 | else | |
291 | syslog(LOG_NOTICE, | |
292 | "LOGIN %s REFUSED ON TTY %s", | |
293 | pwd->pw_name, tty); | |
294 | continue; | |
295 | } | |
296 | ||
80f91e3f | 297 | setpriority(PRIO_PROCESS, 0, -4); |
9d6a5a69 KF |
298 | pp = getpass("Password:"); |
299 | p = crypt(pp, salt); | |
80f91e3f | 300 | setpriority(PRIO_PROCESS, 0, 0); |
9d6a5a69 | 301 | |
9d6a5a69 | 302 | (void) bzero(pp, strlen(pp)); |
ede75793 | 303 | if (pwd && !strcmp(p, pwd->pw_passwd)) |
80f91e3f KB |
304 | break; |
305 | ||
0e08a2b3 | 306 | (void)printf("Login incorrect\n"); |
659be7fb | 307 | failures++; |
f0c0c252 KB |
308 | /* we allow 10 tries, but after 3 we start backing off */ |
309 | if (++cnt > 3) { | |
310 | if (cnt >= 10) { | |
311 | badlogin(username); | |
312 | (void)ioctl(0, TIOCHPCL, (struct sgttyb *)NULL); | |
313 | sleepexit(1); | |
314 | } | |
315 | sleep((u_int)((cnt - 3) * 5)); | |
f570e1ff | 316 | } |
80f91e3f | 317 | } |
88a01c09 | 318 | |
80f91e3f KB |
319 | /* committed to login -- turn off timeout */ |
320 | (void)alarm((u_int)0); | |
321 | ||
a339b173 KB |
322 | /* paranoia... */ |
323 | endpwent(); | |
324 | ||
ede75793 | 325 | if (chdir(pwd->pw_dir) < 0) { |
0e08a2b3 | 326 | (void)printf("No directory %s!\n", pwd->pw_dir); |
ede75793 KB |
327 | if (chdir("/")) |
328 | exit(0); | |
329 | pwd->pw_dir = "/"; | |
0e08a2b3 | 330 | (void)printf("Logging in with home = \"/\".\n"); |
ede75793 KB |
331 | } |
332 | ||
83cc7253 KB |
333 | #define TWOWEEKS (14*24*60*60) |
334 | if (pwd->pw_change || pwd->pw_expire) | |
335 | (void)gettimeofday(&tp, (struct timezone *)NULL); | |
336 | if (pwd->pw_change) | |
337 | if (tp.tv_sec >= pwd->pw_change) { | |
338 | printf("Sorry -- your password has expired.\n"); | |
339 | sleepexit(1); | |
340 | } | |
341 | else if (tp.tv_sec - pwd->pw_change < TWOWEEKS) { | |
342 | ttp = localtime(&pwd->pw_change); | |
343 | printf("Warning: your password expires on %s %d, 19%d\n", | |
344 | months[ttp->tm_mon], ttp->tm_mday, ttp->tm_year); | |
345 | } | |
346 | if (pwd->pw_expire) | |
347 | if (tp.tv_sec >= pwd->pw_expire) { | |
348 | printf("Sorry -- your account has expired.\n"); | |
349 | sleepexit(1); | |
350 | } | |
351 | else if (tp.tv_sec - pwd->pw_expire < TWOWEEKS) { | |
352 | ttp = localtime(&pwd->pw_expire); | |
353 | printf("Warning: your account expires on %s %d, 19%d\n", | |
354 | months[ttp->tm_mon], ttp->tm_mday, ttp->tm_year); | |
355 | } | |
356 | ||
c91c86eb KB |
357 | if (pwd->pw_change || pwd->pw_expire) |
358 | (void)gettimeofday(&tp, (struct timezone *)NULL); | |
359 | if (pwd->pw_change) | |
360 | if (tp.tv_sec >= pwd->pw_change) { | |
0e08a2b3 | 361 | (void)printf("Sorry -- your password has expired.\n"); |
c91c86eb KB |
362 | sleepexit(1); |
363 | } | |
50112e48 KB |
364 | else if (pwd->pw_change - tp.tv_sec < |
365 | 2 * DAYSPERWEEK * SECSPERDAY && !quietlog) { | |
c91c86eb | 366 | ttp = localtime(&pwd->pw_change); |
0e08a2b3 | 367 | (void)printf("Warning: your password expires on %s %d, %d\n", |
50112e48 KB |
368 | months[ttp->tm_mon], ttp->tm_mday, |
369 | TM_YEAR_BASE + ttp->tm_year); | |
c91c86eb KB |
370 | } |
371 | if (pwd->pw_expire) | |
372 | if (tp.tv_sec >= pwd->pw_expire) { | |
0e08a2b3 | 373 | (void)printf("Sorry -- your account has expired.\n"); |
c91c86eb KB |
374 | sleepexit(1); |
375 | } | |
50112e48 KB |
376 | else if (pwd->pw_expire - tp.tv_sec < |
377 | 2 * DAYSPERWEEK * SECSPERDAY && !quietlog) { | |
c91c86eb | 378 | ttp = localtime(&pwd->pw_expire); |
0e08a2b3 | 379 | (void)printf("Warning: your account expires on %s %d, %d\n", |
50112e48 KB |
380 | months[ttp->tm_mon], ttp->tm_mday, |
381 | TM_YEAR_BASE + ttp->tm_year); | |
c91c86eb KB |
382 | } |
383 | ||
ede75793 | 384 | /* nothing else left to fail -- really log in */ |
80f91e3f KB |
385 | { |
386 | struct utmp utmp; | |
387 | ||
659be7fb | 388 | bzero((char *)&utmp, sizeof(utmp)); |
80f91e3f KB |
389 | (void)time(&utmp.ut_time); |
390 | strncpy(utmp.ut_name, username, sizeof(utmp.ut_name)); | |
a829b33b KB |
391 | if (hostname) |
392 | strncpy(utmp.ut_host, hostname, sizeof(utmp.ut_host)); | |
80f91e3f KB |
393 | strncpy(utmp.ut_line, tty, sizeof(utmp.ut_line)); |
394 | login(&utmp); | |
f570e1ff | 395 | } |
80f91e3f | 396 | |
f0c0c252 | 397 | dolastlog(quietlog); |
80f91e3f | 398 | |
d0faf133 | 399 | if (!hflag && !rflag) { /* XXX */ |
80f91e3f KB |
400 | static struct winsize win = { 0, 0, 0, 0 }; |
401 | ||
402 | (void)ioctl(0, TIOCSWINSZ, &win); | |
403 | } | |
404 | ||
405 | (void)chown(ttyn, pwd->pw_uid, | |
406 | (gr = getgrnam(TTYGRPNAME)) ? gr->gr_gid : pwd->pw_gid); | |
407 | (void)chmod(ttyn, 0620); | |
408 | (void)setgid(pwd->pw_gid); | |
409 | ||
410 | initgroups(username, pwd->pw_gid); | |
411 | ||
ede75793 | 412 | if (*pwd->pw_shell == '\0') |
fb6e7f7e | 413 | pwd->pw_shell = _PATH_BSHELL; |
ede75793 | 414 | |
80f91e3f | 415 | /* destroy environment unless user has requested preservation */ |
d3737d51 SL |
416 | if (!pflag) |
417 | environ = envinit; | |
ede75793 KB |
418 | (void)setenv("HOME", pwd->pw_dir, 1); |
419 | (void)setenv("SHELL", pwd->pw_shell, 1); | |
d3737d51 | 420 | if (term[0] == '\0') |
659be7fb | 421 | strncpy(term, stypeof(tty), sizeof(term)); |
ede75793 KB |
422 | (void)setenv("TERM", term, 0); |
423 | (void)setenv("USER", pwd->pw_name, 1); | |
c502712b | 424 | (void)setenv("PATH", _PATH_DEFPATH, 0); |
d3737d51 | 425 | |
9479aa87 | 426 | if (tty[sizeof("tty")-1] == 'd') |
d3737d51 SL |
427 | syslog(LOG_INFO, "DIALUP %s, %s", tty, pwd->pw_name); |
428 | if (pwd->pw_uid == 0) | |
80f91e3f | 429 | if (hostname) |
659be7fb | 430 | syslog(LOG_NOTICE, "ROOT LOGIN ON %s FROM %s", |
f0c0c252 | 431 | tty, hostname); |
df9d9536 | 432 | else |
659be7fb | 433 | syslog(LOG_NOTICE, "ROOT LOGIN ON %s", tty); |
80f91e3f | 434 | |
4f8d3876 | 435 | if (!quietlog) { |
6821e9c5 | 436 | struct stat st; |
d3737d51 | 437 | |
80f91e3f | 438 | motd(); |
fb6e7f7e | 439 | (void)sprintf(tbuf, "%s/%s", _PATH_MAILDIR, pwd->pw_name); |
80f91e3f | 440 | if (stat(tbuf, &st) == 0 && st.st_size != 0) |
0e08a2b3 | 441 | (void)printf("You have %smail.\n", |
80f91e3f | 442 | (st.st_mtime > st.st_atime) ? "new " : ""); |
f570e1ff | 443 | } |
80f91e3f KB |
444 | |
445 | (void)signal(SIGALRM, SIG_DFL); | |
446 | (void)signal(SIGQUIT, SIG_DFL); | |
447 | (void)signal(SIGINT, SIG_DFL); | |
448 | (void)signal(SIGTSTP, SIG_IGN); | |
449 | ||
450 | tbuf[0] = '-'; | |
451 | strcpy(tbuf + 1, (p = rindex(pwd->pw_shell, '/')) ? | |
452 | p + 1 : pwd->pw_shell); | |
0e08a2b3 | 453 | |
3d28f6dd KS |
454 | if (setlogin(pwd->pw_name) < 0) |
455 | syslog(LOG_ERR, "setlogin() failure: %m"); | |
a339b173 | 456 | |
0e08a2b3 KB |
457 | /* discard permissions last so can't get killed and drop core */ |
458 | (void)setuid(pwd->pw_uid); | |
459 | ||
80f91e3f | 460 | execlp(pwd->pw_shell, tbuf, 0); |
0e08a2b3 | 461 | (void)fprintf(stderr, "login: no shell: %s.\n", strerror(errno)); |
88a01c09 BJ |
462 | exit(0); |
463 | } | |
464 | ||
80f91e3f | 465 | getloginname() |
3b8dd95e | 466 | { |
80f91e3f KB |
467 | register int ch; |
468 | register char *p; | |
469 | static char nbuf[UT_NAMESIZE + 1]; | |
3b8dd95e | 470 | |
80f91e3f | 471 | for (;;) { |
0e08a2b3 | 472 | (void)printf("login: "); |
ede75793 | 473 | for (p = nbuf; (ch = getchar()) != '\n'; ) { |
f0c0c252 KB |
474 | if (ch == EOF) { |
475 | badlogin(username); | |
3b8dd95e | 476 | exit(0); |
f0c0c252 | 477 | } |
ede75793 | 478 | if (p < nbuf + UT_NAMESIZE) |
80f91e3f | 479 | *p++ = ch; |
3b8dd95e | 480 | } |
80f91e3f KB |
481 | if (p > nbuf) |
482 | if (nbuf[0] == '-') | |
0e08a2b3 | 483 | (void)fprintf(stderr, |
80f91e3f KB |
484 | "login names may not start with '-'.\n"); |
485 | else { | |
486 | *p = '\0'; | |
487 | username = nbuf; | |
ede75793 | 488 | break; |
80f91e3f | 489 | } |
3b8dd95e | 490 | } |
3b8dd95e SL |
491 | } |
492 | ||
493 | timedout() | |
494 | { | |
0e08a2b3 | 495 | (void)fprintf(stderr, "Login timed out after %d seconds\n", timeout); |
3b8dd95e SL |
496 | exit(0); |
497 | } | |
498 | ||
659be7fb MK |
499 | rootterm(ttyn) |
500 | char *ttyn; | |
88a01c09 | 501 | { |
80f91e3f | 502 | struct ttyent *t; |
1886582e | 503 | |
659be7fb | 504 | return((t = getttynam(ttyn)) && t->ty_status&TTY_SECURE); |
88a01c09 BJ |
505 | } |
506 | ||
ede75793 KB |
507 | jmp_buf motdinterrupt; |
508 | ||
80f91e3f | 509 | motd() |
f570e1ff | 510 | { |
ede75793 | 511 | register int fd, nchars; |
b32e4ad7 KF |
512 | sig_t oldint; |
513 | int sigint(); | |
ede75793 | 514 | char tbuf[8192]; |
80f91e3f | 515 | |
fb6e7f7e | 516 | if ((fd = open(_PATH_MOTDFILE, O_RDONLY, 0)) < 0) |
80f91e3f KB |
517 | return; |
518 | oldint = signal(SIGINT, sigint); | |
ede75793 KB |
519 | if (setjmp(motdinterrupt) == 0) |
520 | while ((nchars = read(fd, tbuf, sizeof(tbuf))) > 0) | |
521 | (void)write(fileno(stdout), tbuf, nchars); | |
80f91e3f | 522 | (void)signal(SIGINT, oldint); |
ede75793 | 523 | (void)close(fd); |
80f91e3f | 524 | } |
9479aa87 | 525 | |
80f91e3f KB |
526 | sigint() |
527 | { | |
ede75793 | 528 | longjmp(motdinterrupt, 1); |
80f91e3f KB |
529 | } |
530 | ||
531 | checknologin() | |
532 | { | |
533 | register int fd, nchars; | |
ede75793 | 534 | char tbuf[8192]; |
80f91e3f | 535 | |
fb6e7f7e | 536 | if ((fd = open(_PATH_NOLOGIN, O_RDONLY, 0)) >= 0) { |
80f91e3f KB |
537 | while ((nchars = read(fd, tbuf, sizeof(tbuf))) > 0) |
538 | (void)write(fileno(stdout), tbuf, nchars); | |
539 | sleepexit(0); | |
f570e1ff | 540 | } |
f570e1ff BJ |
541 | } |
542 | ||
f0c0c252 | 543 | dolastlog(quiet) |
80f91e3f | 544 | int quiet; |
88a01c09 | 545 | { |
80f91e3f KB |
546 | struct lastlog ll; |
547 | int fd; | |
c91c86eb | 548 | char *ctime(); |
83cc7253 | 549 | char *ctime(); |
80f91e3f | 550 | |
fb6e7f7e | 551 | if ((fd = open(_PATH_LASTLOG, O_RDWR, 0)) >= 0) { |
ede75793 | 552 | (void)lseek(fd, (off_t)pwd->pw_uid * sizeof(ll), L_SET); |
80f91e3f KB |
553 | if (!quiet) { |
554 | if (read(fd, (char *)&ll, sizeof(ll)) == sizeof(ll) && | |
555 | ll.ll_time != 0) { | |
0e08a2b3 | 556 | (void)printf("Last login: %.*s ", |
80f91e3f KB |
557 | 24-5, (char *)ctime(&ll.ll_time)); |
558 | if (*ll.ll_host != '\0') | |
0e08a2b3 | 559 | (void)printf("from %.*s\n", |
80f91e3f KB |
560 | sizeof(ll.ll_host), ll.ll_host); |
561 | else | |
0e08a2b3 | 562 | (void)printf("on %.*s\n", |
80f91e3f KB |
563 | sizeof(ll.ll_line), ll.ll_line); |
564 | } | |
ede75793 | 565 | (void)lseek(fd, (off_t)pwd->pw_uid * sizeof(ll), L_SET); |
80f91e3f | 566 | } |
659be7fb | 567 | bzero((char *)&ll, sizeof(ll)); |
80f91e3f KB |
568 | (void)time(&ll.ll_time); |
569 | strncpy(ll.ll_line, tty, sizeof(ll.ll_line)); | |
a829b33b KB |
570 | if (hostname) |
571 | strncpy(ll.ll_host, hostname, sizeof(ll.ll_host)); | |
80f91e3f KB |
572 | (void)write(fd, (char *)&ll, sizeof(ll)); |
573 | (void)close(fd); | |
88a01c09 | 574 | } |
88a01c09 BJ |
575 | } |
576 | ||
f0c0c252 KB |
577 | badlogin(name) |
578 | char *name; | |
579 | { | |
659be7fb | 580 | if (failures == 0) |
f0c0c252 KB |
581 | return; |
582 | if (hostname) | |
659be7fb MK |
583 | syslog(LOG_NOTICE, "%d LOGIN FAILURE%s FROM %s, %s", |
584 | failures, failures > 1 ? "S" : "", hostname, name); | |
f0c0c252 | 585 | else |
659be7fb MK |
586 | syslog(LOG_NOTICE, "%d LOGIN FAILURE%s ON %s, %s", |
587 | failures, failures > 1 ? "S" : "", tty, name); | |
f0c0c252 KB |
588 | } |
589 | ||
f570e1ff | 590 | #undef UNKNOWN |
80f91e3f | 591 | #define UNKNOWN "su" |
88a01c09 BJ |
592 | |
593 | char * | |
659be7fb MK |
594 | stypeof(ttyid) |
595 | char *ttyid; | |
88a01c09 | 596 | { |
80f91e3f | 597 | struct ttyent *t; |
88a01c09 | 598 | |
659be7fb | 599 | return(ttyid && (t = getttynam(ttyid)) ? t->ty_type : UNKNOWN); |
88a01c09 | 600 | } |
86eb6c9e BJ |
601 | |
602 | getstr(buf, cnt, err) | |
80f91e3f | 603 | char *buf, *err; |
86eb6c9e | 604 | int cnt; |
86eb6c9e | 605 | { |
80f91e3f | 606 | char ch; |
86eb6c9e BJ |
607 | |
608 | do { | |
80f91e3f | 609 | if (read(0, &ch, sizeof(ch)) != sizeof(ch)) |
86eb6c9e BJ |
610 | exit(1); |
611 | if (--cnt < 0) { | |
0e08a2b3 | 612 | (void)fprintf(stderr, "%s too long\r\n", err); |
80f91e3f | 613 | sleepexit(1); |
86eb6c9e | 614 | } |
80f91e3f KB |
615 | *buf++ = ch; |
616 | } while (ch); | |
86eb6c9e | 617 | } |
4f8d3876 | 618 | |
80f91e3f KB |
619 | sleepexit(eval) |
620 | int eval; | |
c89291e2 | 621 | { |
80f91e3f KB |
622 | sleep((u_int)5); |
623 | exit(eval); | |
c89291e2 | 624 | } |
d0faf133 KB |
625 | |
626 | doremotelogin(host) | |
627 | char *host; | |
628 | { | |
629 | static char lusername[UT_NAMESIZE+1]; | |
630 | char rusername[UT_NAMESIZE+1]; | |
631 | ||
632 | getstr(rusername, sizeof(rusername), "remuser"); | |
633 | getstr(lusername, sizeof(lusername), "locuser"); | |
634 | getstr(term, sizeof(term), "Terminal type"); | |
635 | username = lusername; | |
636 | pwd = getpwnam(username); | |
637 | if (pwd == NULL) | |
638 | return(-1); | |
639 | return(ruserok(host, (pwd->pw_uid == 0), rusername, username)); | |
640 | } | |
641 | ||
642 | char *speeds[] = { | |
643 | "0", "50", "75", "110", "134", "150", "200", "300", "600", | |
644 | "1200", "1800", "2400", "4800", "9600", "19200", "38400", | |
645 | }; | |
646 | #define NSPEEDS (sizeof(speeds) / sizeof(speeds[0])) | |
647 | ||
648 | doremoteterm(tp) | |
649 | struct sgttyb *tp; | |
650 | { | |
651 | register char *cp = index(term, '/'), **cpp; | |
652 | char *speed; | |
653 | ||
654 | if (cp) { | |
655 | *cp++ = '\0'; | |
656 | speed = cp; | |
657 | cp = index(speed, '/'); | |
658 | if (cp) | |
659 | *cp++ = '\0'; | |
660 | for (cpp = speeds; cpp < &speeds[NSPEEDS]; cpp++) | |
661 | if (strcmp(*cpp, speed) == 0) { | |
662 | tp->sg_ispeed = tp->sg_ospeed = cpp-speeds; | |
663 | break; | |
664 | } | |
665 | } | |
666 | tp->sg_flags = ECHO|CRMOD|ANYP|XTABS; | |
667 | } |