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1d7b9b20 | 1 | /* |
2 | * Copyright (c) 2000 Andre Lucas. All rights reserved. | |
564dd50a | 3 | * Portions copyright (c) 1998 Todd C. Miller |
4 | * Portions copyright (c) 1996 Jason Downs | |
5 | * Portions copyright (c) 1996 Theo de Raadt | |
1d7b9b20 | 6 | * |
7 | * Redistribution and use in source and binary forms, with or without | |
8 | * modification, are permitted provided that the following conditions | |
9 | * are met: | |
10 | * 1. Redistributions of source code must retain the above copyright | |
11 | * notice, this list of conditions and the following disclaimer. | |
12 | * 2. Redistributions in binary form must reproduce the above copyright | |
13 | * notice, this list of conditions and the following disclaimer in the | |
14 | * documentation and/or other materials provided with the distribution. | |
1d7b9b20 | 15 | * |
16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | |
17 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |
18 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
19 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
20 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
21 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
22 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
23 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
24 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
25 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
26 | */ | |
27 | ||
b6610e8f | 28 | /* |
29 | * The btmp logging code is derived from login.c from util-linux and is under | |
30 | * the the following license: | |
31 | * | |
32 | * Copyright (c) 1980, 1987, 1988 The Regents of the University of California. | |
33 | * All rights reserved. | |
34 | * | |
35 | * Redistribution and use in source and binary forms are permitted | |
36 | * provided that the above copyright notice and this paragraph are | |
37 | * duplicated in all such forms and that any documentation, | |
38 | * advertising materials, and other materials related to such | |
39 | * distribution and use acknowledge that the software was developed | |
40 | * by the University of California, Berkeley. The name of the | |
41 | * University may not be used to endorse or promote products derived | |
42 | * from this software without specific prior written permission. | |
43 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | |
44 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | |
45 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
46 | */ | |
47 | ||
48 | ||
2b87da3b | 49 | /** |
1d7b9b20 | 50 | ** loginrec.c: platform-independent login recording and lastlog retrieval |
51 | **/ | |
52 | ||
564dd50a | 53 | /* |
fa64c868 | 54 | * The new login code explained |
55 | * ============================ | |
56 | * | |
57 | * This code attempts to provide a common interface to login recording | |
58 | * (utmp and friends) and last login time retrieval. | |
59 | * | |
60 | * Its primary means of achieving this is to use 'struct logininfo', a | |
61 | * union of all the useful fields in the various different types of | |
62 | * system login record structures one finds on UNIX variants. | |
63 | * | |
64 | * We depend on autoconf to define which recording methods are to be | |
65 | * used, and which fields are contained in the relevant data structures | |
66 | * on the local system. Many C preprocessor symbols affect which code | |
67 | * gets compiled here. | |
68 | * | |
69 | * The code is designed to make it easy to modify a particular | |
70 | * recording method, without affecting other methods nor requiring so | |
71 | * many nested conditional compilation blocks as were commonplace in | |
72 | * the old code. | |
73 | * | |
74 | * For login recording, we try to use the local system's libraries as | |
75 | * these are clearly most likely to work correctly. For utmp systems | |
76 | * this usually means login() and logout() or setutent() etc., probably | |
77 | * in libutil, along with logwtmp() etc. On these systems, we fall back | |
78 | * to writing the files directly if we have to, though this method | |
79 | * requires very thorough testing so we do not corrupt local auditing | |
80 | * information. These files and their access methods are very system | |
81 | * specific indeed. | |
82 | * | |
83 | * For utmpx systems, the corresponding library functions are | |
84 | * setutxent() etc. To the author's knowledge, all utmpx systems have | |
85 | * these library functions and so no direct write is attempted. If such | |
86 | * a system exists and needs support, direct analogues of the [uw]tmp | |
87 | * code should suffice. | |
88 | * | |
89 | * Retrieving the time of last login ('lastlog') is in some ways even | |
90 | * more problemmatic than login recording. Some systems provide a | |
91 | * simple table of all users which we seek based on uid and retrieve a | |
92 | * relatively standard structure. Others record the same information in | |
93 | * a directory with a separate file, and others don't record the | |
94 | * information separately at all. For systems in the latter category, | |
95 | * we look backwards in the wtmp or wtmpx file for the last login entry | |
96 | * for our user. Naturally this is slower and on busy systems could | |
97 | * incur a significant performance penalty. | |
98 | * | |
99 | * Calling the new code | |
100 | * -------------------- | |
101 | * | |
102 | * In OpenSSH all login recording and retrieval is performed in | |
103 | * login.c. Here you'll find working examples. Also, in the logintest.c | |
104 | * program there are more examples. | |
105 | * | |
106 | * Internal handler calling method | |
107 | * ------------------------------- | |
108 | * | |
109 | * When a call is made to login_login() or login_logout(), both | |
110 | * routines set a struct logininfo flag defining which action (log in, | |
111 | * or log out) is to be taken. They both then call login_write(), which | |
112 | * calls whichever of the many structure-specific handlers autoconf | |
113 | * selects for the local system. | |
114 | * | |
115 | * The handlers themselves handle system data structure specifics. Both | |
116 | * struct utmp and struct utmpx have utility functions (see | |
117 | * construct_utmp*()) to try to make it simpler to add extra systems | |
118 | * that introduce new features to either structure. | |
119 | * | |
120 | * While it may seem terribly wasteful to replicate so much similar | |
121 | * code for each method, experience has shown that maintaining code to | |
122 | * write both struct utmp and utmpx in one function, whilst maintaining | |
123 | * support for all systems whether they have library support or not, is | |
124 | * a difficult and time-consuming task. | |
125 | * | |
126 | * Lastlog support proceeds similarly. Functions login_get_lastlog() | |
127 | * (and its OpenSSH-tuned friend login_get_lastlog_time()) call | |
128 | * getlast_entry(), which tries one of three methods to find the last | |
129 | * login time. It uses local system lastlog support if it can, | |
130 | * otherwise it tries wtmp or wtmpx before giving up and returning 0, | |
131 | * meaning "tilt". | |
132 | * | |
133 | * Maintenance | |
134 | * ----------- | |
135 | * | |
136 | * In many cases it's possible to tweak autoconf to select the correct | |
137 | * methods for a particular platform, either by improving the detection | |
138 | * code (best), or by presetting DISABLE_<method> or CONF_<method>_FILE | |
139 | * symbols for the platform. | |
140 | * | |
141 | * Use logintest to check which symbols are defined before modifying | |
142 | * configure.ac and loginrec.c. (You have to build logintest yourself | |
143 | * with 'make logintest' as it's not built by default.) | |
144 | * | |
145 | * Otherwise, patches to the specific method(s) are very helpful! | |
146 | */ | |
1d7b9b20 | 147 | |
148 | #include "includes.h" | |
149 | ||
81e73e57 | 150 | #include <sys/types.h> |
151 | #include <sys/stat.h> | |
9794d008 | 152 | #include <sys/socket.h> |
153 | ||
154 | #include <netinet/in.h> | |
81e73e57 | 155 | |
22bbb3e6 | 156 | #include <fcntl.h> |
b1842393 | 157 | #include <pwd.h> |
158 | ||
1d7b9b20 | 159 | #include "ssh.h" |
160 | #include "xmalloc.h" | |
161 | #include "loginrec.h" | |
42f11eb2 | 162 | #include "log.h" |
163 | #include "atomicio.h" | |
b6610e8f | 164 | #include "packet.h" |
165 | #include "canohost.h" | |
c00e4d75 | 166 | #include "auth.h" |
c53d8c93 | 167 | #include "buffer.h" |
1d7b9b20 | 168 | |
44d5f7f7 | 169 | #ifdef HAVE_UTIL_H |
fa64c868 | 170 | # include <util.h> |
44d5f7f7 | 171 | #endif |
172 | ||
8f523d67 | 173 | #ifdef HAVE_LIBUTIL_H |
fa64c868 | 174 | # include <libutil.h> |
8f523d67 | 175 | #endif |
176 | ||
1d7b9b20 | 177 | /** |
178 | ** prototypes for helper functions in this file | |
179 | **/ | |
180 | ||
181 | #if HAVE_UTMP_H | |
1d7b9b20 | 182 | void set_utmp_time(struct logininfo *li, struct utmp *ut); |
183 | void construct_utmp(struct logininfo *li, struct utmp *ut); | |
184 | #endif | |
185 | ||
186 | #ifdef HAVE_UTMPX_H | |
1d7b9b20 | 187 | void set_utmpx_time(struct logininfo *li, struct utmpx *ut); |
188 | void construct_utmpx(struct logininfo *li, struct utmpx *ut); | |
189 | #endif | |
190 | ||
191 | int utmp_write_entry(struct logininfo *li); | |
192 | int utmpx_write_entry(struct logininfo *li); | |
193 | int wtmp_write_entry(struct logininfo *li); | |
194 | int wtmpx_write_entry(struct logininfo *li); | |
195 | int lastlog_write_entry(struct logininfo *li); | |
196 | int syslogin_write_entry(struct logininfo *li); | |
197 | ||
198 | int getlast_entry(struct logininfo *li); | |
199 | int lastlog_get_entry(struct logininfo *li); | |
200 | int wtmp_get_entry(struct logininfo *li); | |
201 | int wtmpx_get_entry(struct logininfo *li); | |
202 | ||
5ccf88cb | 203 | extern Buffer loginmsg; |
204 | ||
5abcdf8e | 205 | /* pick the shortest string */ |
fa64c868 | 206 | #define MIN_SIZEOF(s1,s2) (sizeof(s1) < sizeof(s2) ? sizeof(s1) : sizeof(s2)) |
5abcdf8e | 207 | |
1d7b9b20 | 208 | /** |
209 | ** platform-independent login functions | |
210 | **/ | |
211 | ||
fa64c868 | 212 | /* |
213 | * login_login(struct logininfo *) - Record a login | |
2b87da3b | 214 | * |
5abcdf8e | 215 | * Call with a pointer to a struct logininfo initialised with |
216 | * login_init_entry() or login_alloc_entry() | |
217 | * | |
218 | * Returns: | |
219 | * >0 if successful | |
220 | * 0 on failure (will use OpenSSH's logging facilities for diagnostics) | |
221 | */ | |
564dd50a | 222 | int |
fa64c868 | 223 | login_login(struct logininfo *li) |
564dd50a | 224 | { |
225 | li->type = LTYPE_LOGIN; | |
fa64c868 | 226 | return (login_write(li)); |
564dd50a | 227 | } |
1d7b9b20 | 228 | |
229 | ||
fa64c868 | 230 | /* |
231 | * login_logout(struct logininfo *) - Record a logout | |
5abcdf8e | 232 | * |
233 | * Call as with login_login() | |
234 | * | |
235 | * Returns: | |
236 | * >0 if successful | |
237 | * 0 on failure (will use OpenSSH's logging facilities for diagnostics) | |
238 | */ | |
564dd50a | 239 | int |
240 | login_logout(struct logininfo *li) | |
241 | { | |
242 | li->type = LTYPE_LOGOUT; | |
fa64c868 | 243 | return (login_write(li)); |
1d7b9b20 | 244 | } |
245 | ||
fa64c868 | 246 | /* |
247 | * login_get_lastlog_time(int) - Retrieve the last login time | |
5abcdf8e | 248 | * |
249 | * Retrieve the last login time for the given uid. Will try to use the | |
250 | * system lastlog facilities if they are available, but will fall back | |
251 | * to looking in wtmp/wtmpx if necessary | |
252 | * | |
253 | * Returns: | |
254 | * 0 on failure, or if user has never logged in | |
255 | * Time in seconds from the epoch if successful | |
256 | * | |
257 | * Useful preprocessor symbols: | |
258 | * DISABLE_LASTLOG: If set, *never* even try to retrieve lastlog | |
259 | * info | |
260 | * USE_LASTLOG: If set, indicates the presence of system lastlog | |
261 | * facilities. If this and DISABLE_LASTLOG are not set, | |
262 | * try to retrieve lastlog information from wtmp/wtmpx. | |
263 | */ | |
564dd50a | 264 | unsigned int |
265 | login_get_lastlog_time(const int uid) | |
266 | { | |
267 | struct logininfo li; | |
1d7b9b20 | 268 | |
5abcdf8e | 269 | if (login_get_lastlog(&li, uid)) |
fa64c868 | 270 | return (li.tv_sec); |
5abcdf8e | 271 | else |
fa64c868 | 272 | return (0); |
564dd50a | 273 | } |
1d7b9b20 | 274 | |
fa64c868 | 275 | /* |
276 | * login_get_lastlog(struct logininfo *, int) - Retrieve a lastlog entry | |
5abcdf8e | 277 | * |
278 | * Retrieve a logininfo structure populated (only partially) with | |
279 | * information from the system lastlog data, or from wtmp/wtmpx if no | |
280 | * system lastlog information exists. | |
281 | * | |
282 | * Note this routine must be given a pre-allocated logininfo. | |
283 | * | |
284 | * Returns: | |
285 | * >0: A pointer to your struct logininfo if successful | |
286 | * 0 on failure (will use OpenSSH's logging facilities for diagnostics) | |
5abcdf8e | 287 | */ |
564dd50a | 288 | struct logininfo * |
289 | login_get_lastlog(struct logininfo *li, const int uid) | |
290 | { | |
5abcdf8e | 291 | struct passwd *pw; |
5abcdf8e | 292 | |
dbaa2e87 | 293 | memset(li, '\0', sizeof(*li)); |
1d7b9b20 | 294 | li->uid = uid; |
5abcdf8e | 295 | |
2b87da3b | 296 | /* |
9f32ceb4 | 297 | * If we don't have a 'real' lastlog, we need the username to |
5abcdf8e | 298 | * reliably search wtmp(x) for the last login (see |
2b87da3b | 299 | * wtmp_get_entry().) |
9f32ceb4 | 300 | */ |
5abcdf8e | 301 | pw = getpwuid(uid); |
a05a70ab | 302 | if (pw == NULL) |
a233586b | 303 | fatal("%s: Cannot find account for uid %i", __func__, uid); |
2b87da3b | 304 | |
1bfbb762 | 305 | /* No MIN_SIZEOF here - we absolutely *must not* truncate the |
fa64c868 | 306 | * username (XXX - so check for trunc!) */ |
d8caae24 | 307 | strlcpy(li->username, pw->pw_name, sizeof(li->username)); |
a05a70ab | 308 | |
564dd50a | 309 | if (getlast_entry(li)) |
fa64c868 | 310 | return (li); |
564dd50a | 311 | else |
fa64c868 | 312 | return (NULL); |
1d7b9b20 | 313 | } |
314 | ||
1d7b9b20 | 315 | |
fa64c868 | 316 | /* |
317 | * login_alloc_entry(int, char*, char*, char*) - Allocate and initialise | |
2b87da3b | 318 | * a logininfo structure |
319 | * | |
5abcdf8e | 320 | * This function creates a new struct logininfo, a data structure |
321 | * meant to carry the information required to portably record login info. | |
322 | * | |
323 | * Returns a pointer to a newly created struct logininfo. If memory | |
324 | * allocation fails, the program halts. | |
325 | */ | |
564dd50a | 326 | struct |
327 | logininfo *login_alloc_entry(int pid, const char *username, | |
fa64c868 | 328 | const char *hostname, const char *line) |
564dd50a | 329 | { |
330 | struct logininfo *newli; | |
1d7b9b20 | 331 | |
fa64c868 | 332 | newli = xmalloc(sizeof(*newli)); |
333 | login_init_entry(newli, pid, username, hostname, line); | |
334 | return (newli); | |
1d7b9b20 | 335 | } |
336 | ||
337 | ||
5abcdf8e | 338 | /* login_free_entry(struct logininfo *) - free struct memory */ |
1d7b9b20 | 339 | void |
564dd50a | 340 | login_free_entry(struct logininfo *li) |
341 | { | |
342 | xfree(li); | |
1d7b9b20 | 343 | } |
344 | ||
345 | ||
5abcdf8e | 346 | /* login_init_entry(struct logininfo *, int, char*, char*, char*) |
347 | * - initialise a struct logininfo | |
2b87da3b | 348 | * |
5abcdf8e | 349 | * Populates a new struct logininfo, a data structure meant to carry |
350 | * the information required to portably record login info. | |
351 | * | |
352 | * Returns: 1 | |
353 | */ | |
564dd50a | 354 | int |
2b87da3b | 355 | login_init_entry(struct logininfo *li, int pid, const char *username, |
fa64c868 | 356 | const char *hostname, const char *line) |
564dd50a | 357 | { |
d8caae24 | 358 | struct passwd *pw; |
2b87da3b | 359 | |
dbaa2e87 | 360 | memset(li, 0, sizeof(*li)); |
2b87da3b | 361 | |
564dd50a | 362 | li->pid = pid; |
d8caae24 | 363 | |
564dd50a | 364 | /* set the line information */ |
365 | if (line) | |
366 | line_fullname(li->line, line, sizeof(li->line)); | |
1d7b9b20 | 367 | |
d8caae24 | 368 | if (username) { |
564dd50a | 369 | strlcpy(li->username, username, sizeof(li->username)); |
d8caae24 | 370 | pw = getpwnam(li->username); |
fa64c868 | 371 | if (pw == NULL) { |
d1cf9a87 | 372 | fatal("%s: Cannot find user \"%s\"", __func__, |
fa64c868 | 373 | li->username); |
374 | } | |
d8caae24 | 375 | li->uid = pw->pw_uid; |
376 | } | |
a05a70ab | 377 | |
564dd50a | 378 | if (hostname) |
379 | strlcpy(li->hostname, hostname, sizeof(li->hostname)); | |
d8caae24 | 380 | |
fa64c868 | 381 | return (1); |
1d7b9b20 | 382 | } |
383 | ||
d1cf9a87 | 384 | /* |
fa64c868 | 385 | * login_set_current_time(struct logininfo *) - set the current time |
5abcdf8e | 386 | * |
387 | * Set the current time in a logininfo structure. This function is | |
388 | * meant to eliminate the need to deal with system dependencies for | |
389 | * time handling. | |
390 | */ | |
1d7b9b20 | 391 | void |
564dd50a | 392 | login_set_current_time(struct logininfo *li) |
393 | { | |
1d7b9b20 | 394 | struct timeval tv; |
395 | ||
396 | gettimeofday(&tv, NULL); | |
2b87da3b | 397 | |
d8caae24 | 398 | li->tv_sec = tv.tv_sec; |
399 | li->tv_usec = tv.tv_usec; | |
1d7b9b20 | 400 | } |
401 | ||
564dd50a | 402 | /* copy a sockaddr_* into our logininfo */ |
1d7b9b20 | 403 | void |
564dd50a | 404 | login_set_addr(struct logininfo *li, const struct sockaddr *sa, |
fa64c868 | 405 | const unsigned int sa_size) |
564dd50a | 406 | { |
407 | unsigned int bufsize = sa_size; | |
408 | ||
409 | /* make sure we don't overrun our union */ | |
410 | if (sizeof(li->hostaddr) < sa_size) | |
411 | bufsize = sizeof(li->hostaddr); | |
412 | ||
fa64c868 | 413 | memcpy(&li->hostaddr.sa, sa, bufsize); |
1d7b9b20 | 414 | } |
1d7b9b20 | 415 | |
564dd50a | 416 | |
417 | /** | |
418 | ** login_write: Call low-level recording functions based on autoconf | |
419 | ** results | |
420 | **/ | |
1d7b9b20 | 421 | int |
fa64c868 | 422 | login_write(struct logininfo *li) |
564dd50a | 423 | { |
3c62e7eb | 424 | #ifndef HAVE_CYGWIN |
fa64c868 | 425 | if (geteuid() != 0) { |
426 | logit("Attempt to write login records by non-root user (aborting)"); | |
427 | return (1); | |
1d7b9b20 | 428 | } |
3c62e7eb | 429 | #endif |
a05a70ab | 430 | |
1d7b9b20 | 431 | /* set the timestamp */ |
432 | login_set_current_time(li); | |
433 | #ifdef USE_LOGIN | |
434 | syslogin_write_entry(li); | |
435 | #endif | |
436 | #ifdef USE_LASTLOG | |
fa64c868 | 437 | if (li->type == LTYPE_LOGIN) |
1d7b9b20 | 438 | lastlog_write_entry(li); |
1d7b9b20 | 439 | #endif |
440 | #ifdef USE_UTMP | |
441 | utmp_write_entry(li); | |
442 | #endif | |
443 | #ifdef USE_WTMP | |
444 | wtmp_write_entry(li); | |
445 | #endif | |
446 | #ifdef USE_UTMPX | |
447 | utmpx_write_entry(li); | |
448 | #endif | |
449 | #ifdef USE_WTMPX | |
450 | wtmpx_write_entry(li); | |
f5ed3301 | 451 | #endif |
452 | #ifdef CUSTOM_SYS_AUTH_RECORD_LOGIN | |
d1cf9a87 | 453 | if (li->type == LTYPE_LOGIN && |
98c044d0 | 454 | !sys_auth_record_login(li->username,li->hostname,li->line, |
455 | &loginmsg)) | |
f5ed3301 | 456 | logit("Writing login record failed for %s", li->username); |
c00e4d75 | 457 | #endif |
6039eeef | 458 | #ifdef SSH_AUDIT_EVENTS |
c00e4d75 | 459 | if (li->type == LTYPE_LOGIN) |
460 | audit_session_open(li->line); | |
461 | else if (li->type == LTYPE_LOGOUT) | |
462 | audit_session_close(li->line); | |
1d7b9b20 | 463 | #endif |
fa64c868 | 464 | return (0); |
1d7b9b20 | 465 | } |
466 | ||
7e2d5fa4 | 467 | #ifdef LOGIN_NEEDS_UTMPX |
468 | int | |
469 | login_utmp_only(struct logininfo *li) | |
470 | { | |
aff51935 | 471 | li->type = LTYPE_LOGIN; |
9e127e27 | 472 | login_set_current_time(li); |
7e2d5fa4 | 473 | # ifdef USE_UTMP |
474 | utmp_write_entry(li); | |
475 | # endif | |
476 | # ifdef USE_WTMP | |
477 | wtmp_write_entry(li); | |
478 | # endif | |
479 | # ifdef USE_UTMPX | |
480 | utmpx_write_entry(li); | |
481 | # endif | |
482 | # ifdef USE_WTMPX | |
483 | wtmpx_write_entry(li); | |
484 | # endif | |
fa64c868 | 485 | return (0); |
7e2d5fa4 | 486 | } |
487 | #endif | |
488 | ||
564dd50a | 489 | /** |
490 | ** getlast_entry: Call low-level functions to retrieve the last login | |
491 | ** time. | |
492 | **/ | |
1d7b9b20 | 493 | |
564dd50a | 494 | /* take the uid in li and return the last login time */ |
1d7b9b20 | 495 | int |
564dd50a | 496 | getlast_entry(struct logininfo *li) |
497 | { | |
498 | #ifdef USE_LASTLOG | |
9f32ceb4 | 499 | return(lastlog_get_entry(li)); |
a05a70ab | 500 | #else /* !USE_LASTLOG */ |
1d7b9b20 | 501 | |
fa64c868 | 502 | #if defined(DISABLE_LASTLOG) |
2b87da3b | 503 | /* On some systems we shouldn't even try to obtain last login |
3f45f1c3 | 504 | * time, e.g. AIX */ |
fa64c868 | 505 | return (0); |
506 | # elif defined(USE_WTMP) && \ | |
507 | (defined(HAVE_TIME_IN_UTMP) || defined(HAVE_TV_IN_UTMP)) | |
564dd50a | 508 | /* retrieve last login time from utmp */ |
a05a70ab | 509 | return (wtmp_get_entry(li)); |
fa64c868 | 510 | # elif defined(USE_WTMPX) && \ |
511 | (defined(HAVE_TIME_IN_UTMPX) || defined(HAVE_TV_IN_UTMPX)) | |
564dd50a | 512 | /* If wtmp isn't available, try wtmpx */ |
a05a70ab | 513 | return (wtmpx_get_entry(li)); |
fa64c868 | 514 | # else |
564dd50a | 515 | /* Give up: No means of retrieving last login time */ |
fa64c868 | 516 | return (0); |
2b87da3b | 517 | # endif /* DISABLE_LASTLOG */ |
a05a70ab | 518 | #endif /* USE_LASTLOG */ |
564dd50a | 519 | } |
1d7b9b20 | 520 | |
521 | ||
1d7b9b20 | 522 | |
523 | /* | |
564dd50a | 524 | * 'line' string utility functions |
525 | * | |
526 | * These functions process the 'line' string into one of three forms: | |
527 | * | |
1d7b9b20 | 528 | * 1. The full filename (including '/dev') |
529 | * 2. The stripped name (excluding '/dev') | |
564dd50a | 530 | * 3. The abbreviated name (e.g. /dev/ttyp00 -> yp00 |
531 | * /dev/pts/1 -> ts/1 ) | |
1d7b9b20 | 532 | * |
533 | * Form 3 is used on some systems to identify a .tmp.? entry when | |
534 | * attempting to remove it. Typically both addition and removal is | |
564dd50a | 535 | * performed by one application - say, sshd - so as long as the choice |
536 | * uniquely identifies a terminal it's ok. | |
1d7b9b20 | 537 | */ |
538 | ||
539 | ||
fa64c868 | 540 | /* |
541 | * line_fullname(): add the leading '/dev/' if it doesn't exist make | |
542 | * sure dst has enough space, if not just copy src (ugh) | |
543 | */ | |
1d7b9b20 | 544 | char * |
44d71ad5 | 545 | line_fullname(char *dst, const char *src, u_int dstsize) |
564dd50a | 546 | { |
1d7b9b20 | 547 | memset(dst, '\0', dstsize); |
fa64c868 | 548 | if ((strncmp(src, "/dev/", 5) == 0) || (dstsize < (strlen(src) + 5))) |
1d7b9b20 | 549 | strlcpy(dst, src, dstsize); |
fa64c868 | 550 | else { |
a4d05724 | 551 | strlcpy(dst, "/dev/", dstsize); |
1d7b9b20 | 552 | strlcat(dst, src, dstsize); |
553 | } | |
fa64c868 | 554 | return (dst); |
1d7b9b20 | 555 | } |
556 | ||
564dd50a | 557 | /* line_stripname(): strip the leading '/dev' if it exists, return dst */ |
1d7b9b20 | 558 | char * |
564dd50a | 559 | line_stripname(char *dst, const char *src, int dstsize) |
560 | { | |
1d7b9b20 | 561 | memset(dst, '\0', dstsize); |
562 | if (strncmp(src, "/dev/", 5) == 0) | |
89d7510a | 563 | strlcpy(dst, src + 5, dstsize); |
1d7b9b20 | 564 | else |
565 | strlcpy(dst, src, dstsize); | |
fa64c868 | 566 | return (dst); |
564dd50a | 567 | } |
568 | ||
d1cf9a87 | 569 | /* |
fa64c868 | 570 | * line_abbrevname(): Return the abbreviated (usually four-character) |
564dd50a | 571 | * form of the line (Just use the last <dstsize> characters of the |
572 | * full name.) | |
573 | * | |
574 | * NOTE: use strncpy because we do NOT necessarily want zero | |
fa64c868 | 575 | * termination |
576 | */ | |
1d7b9b20 | 577 | char * |
2b87da3b | 578 | line_abbrevname(char *dst, const char *src, int dstsize) |
a05a70ab | 579 | { |
580 | size_t len; | |
2b87da3b | 581 | |
1d7b9b20 | 582 | memset(dst, '\0', dstsize); |
2b87da3b | 583 | |
daaff4d5 | 584 | /* Always skip prefix if present */ |
585 | if (strncmp(src, "/dev/", 5) == 0) | |
586 | src += 5; | |
2b87da3b | 587 | |
0e8f4eba | 588 | #ifdef WITH_ABBREV_NO_TTY |
589 | if (strncmp(src, "tty", 3) == 0) | |
590 | src += 3; | |
591 | #endif | |
592 | ||
a05a70ab | 593 | len = strlen(src); |
594 | ||
daaff4d5 | 595 | if (len > 0) { |
596 | if (((int)len - dstsize) > 0) | |
597 | src += ((int)len - dstsize); | |
598 | ||
599 | /* note: _don't_ change this to strlcpy */ | |
2b87da3b | 600 | strncpy(dst, src, (size_t)dstsize); |
a05a70ab | 601 | } |
2b87da3b | 602 | |
fa64c868 | 603 | return (dst); |
1d7b9b20 | 604 | } |
605 | ||
1d7b9b20 | 606 | /** |
607 | ** utmp utility functions | |
564dd50a | 608 | ** |
609 | ** These functions manipulate struct utmp, taking system differences | |
610 | ** into account. | |
1d7b9b20 | 611 | **/ |
612 | ||
613 | #if defined(USE_UTMP) || defined (USE_WTMP) || defined (USE_LOGIN) | |
614 | ||
1d7b9b20 | 615 | /* build the utmp structure */ |
616 | void | |
564dd50a | 617 | set_utmp_time(struct logininfo *li, struct utmp *ut) |
618 | { | |
fa64c868 | 619 | # if defined(HAVE_TV_IN_UTMP) |
1d7b9b20 | 620 | ut->ut_tv.tv_sec = li->tv_sec; |
621 | ut->ut_tv.tv_usec = li->tv_usec; | |
fa64c868 | 622 | # elif defined(HAVE_TIME_IN_UTMP) |
1d7b9b20 | 623 | ut->ut_time = li->tv_sec; |
a05a70ab | 624 | # endif |
1d7b9b20 | 625 | } |
626 | ||
627 | void | |
628 | construct_utmp(struct logininfo *li, | |
564dd50a | 629 | struct utmp *ut) |
630 | { | |
9746ee4b | 631 | # ifdef HAVE_ADDR_V6_IN_UTMP |
632 | struct sockaddr_in6 *sa6; | |
fa64c868 | 633 | # endif |
634 | ||
dbaa2e87 | 635 | memset(ut, '\0', sizeof(*ut)); |
5abcdf8e | 636 | |
637 | /* First fill out fields used for both logins and logouts */ | |
638 | ||
a05a70ab | 639 | # ifdef HAVE_ID_IN_UTMP |
1d7b9b20 | 640 | line_abbrevname(ut->ut_id, li->line, sizeof(ut->ut_id)); |
a05a70ab | 641 | # endif |
1d7b9b20 | 642 | |
a05a70ab | 643 | # ifdef HAVE_TYPE_IN_UTMP |
5abcdf8e | 644 | /* This is done here to keep utmp constants out of struct logininfo */ |
1d7b9b20 | 645 | switch (li->type) { |
646 | case LTYPE_LOGIN: | |
647 | ut->ut_type = USER_PROCESS; | |
ef51930f | 648 | #ifdef _UNICOS |
1a23ac2c | 649 | cray_set_tmpdir(ut); |
650 | #endif | |
1d7b9b20 | 651 | break; |
652 | case LTYPE_LOGOUT: | |
653 | ut->ut_type = DEAD_PROCESS; | |
ef51930f | 654 | #ifdef _UNICOS |
1a23ac2c | 655 | cray_retain_utmp(ut, li->pid); |
656 | #endif | |
1d7b9b20 | 657 | break; |
658 | } | |
a05a70ab | 659 | # endif |
5abcdf8e | 660 | set_utmp_time(li, ut); |
1d7b9b20 | 661 | |
5abcdf8e | 662 | line_stripname(ut->ut_line, li->line, sizeof(ut->ut_line)); |
a05a70ab | 663 | |
664 | # ifdef HAVE_PID_IN_UTMP | |
1d7b9b20 | 665 | ut->ut_pid = li->pid; |
a05a70ab | 666 | # endif |
5abcdf8e | 667 | |
668 | /* If we're logging out, leave all other fields blank */ | |
669 | if (li->type == LTYPE_LOGOUT) | |
fa64c868 | 670 | return; |
5abcdf8e | 671 | |
a05a70ab | 672 | /* |
673 | * These fields are only used when logging in, and are blank | |
2b87da3b | 674 | * for logouts. |
a05a70ab | 675 | */ |
5abcdf8e | 676 | |
677 | /* Use strncpy because we don't necessarily want null termination */ | |
fa64c868 | 678 | strncpy(ut->ut_name, li->username, |
679 | MIN_SIZEOF(ut->ut_name, li->username)); | |
a05a70ab | 680 | # ifdef HAVE_HOST_IN_UTMP |
fa64c868 | 681 | strncpy(ut->ut_host, li->hostname, |
682 | MIN_SIZEOF(ut->ut_host, li->hostname)); | |
a05a70ab | 683 | # endif |
684 | # ifdef HAVE_ADDR_IN_UTMP | |
564dd50a | 685 | /* this is just a 32-bit IP address */ |
686 | if (li->hostaddr.sa.sa_family == AF_INET) | |
687 | ut->ut_addr = li->hostaddr.sa_in.sin_addr.s_addr; | |
2b87da3b | 688 | # endif |
9746ee4b | 689 | # ifdef HAVE_ADDR_V6_IN_UTMP |
690 | /* this is just a 128-bit IPv6 address */ | |
691 | if (li->hostaddr.sa.sa_family == AF_INET6) { | |
692 | sa6 = ((struct sockaddr_in6 *)&li->hostaddr.sa); | |
693 | memcpy(ut->ut_addr_v6, sa6->sin6_addr.s6_addr, 16); | |
694 | if (IN6_IS_ADDR_V4MAPPED(&sa6->sin6_addr)) { | |
695 | ut->ut_addr_v6[0] = ut->ut_addr_v6[3]; | |
696 | ut->ut_addr_v6[1] = 0; | |
697 | ut->ut_addr_v6[2] = 0; | |
698 | ut->ut_addr_v6[3] = 0; | |
699 | } | |
700 | } | |
701 | # endif | |
564dd50a | 702 | } |
a05a70ab | 703 | #endif /* USE_UTMP || USE_WTMP || USE_LOGIN */ |
564dd50a | 704 | |
1d7b9b20 | 705 | /** |
706 | ** utmpx utility functions | |
564dd50a | 707 | ** |
708 | ** These functions manipulate struct utmpx, accounting for system | |
709 | ** variations. | |
1d7b9b20 | 710 | **/ |
711 | ||
712 | #if defined(USE_UTMPX) || defined (USE_WTMPX) | |
1d7b9b20 | 713 | /* build the utmpx structure */ |
714 | void | |
564dd50a | 715 | set_utmpx_time(struct logininfo *li, struct utmpx *utx) |
716 | { | |
fa64c868 | 717 | # if defined(HAVE_TV_IN_UTMPX) |
1d7b9b20 | 718 | utx->ut_tv.tv_sec = li->tv_sec; |
719 | utx->ut_tv.tv_usec = li->tv_usec; | |
fa64c868 | 720 | # elif defined(HAVE_TIME_IN_UTMPX) |
1d7b9b20 | 721 | utx->ut_time = li->tv_sec; |
fa64c868 | 722 | # endif |
1d7b9b20 | 723 | } |
724 | ||
725 | void | |
564dd50a | 726 | construct_utmpx(struct logininfo *li, struct utmpx *utx) |
727 | { | |
9746ee4b | 728 | # ifdef HAVE_ADDR_V6_IN_UTMP |
729 | struct sockaddr_in6 *sa6; | |
730 | # endif | |
dbaa2e87 | 731 | memset(utx, '\0', sizeof(*utx)); |
fa64c868 | 732 | |
daaff4d5 | 733 | # ifdef HAVE_ID_IN_UTMPX |
1d7b9b20 | 734 | line_abbrevname(utx->ut_id, li->line, sizeof(utx->ut_id)); |
daaff4d5 | 735 | # endif |
1d7b9b20 | 736 | |
737 | /* this is done here to keep utmp constants out of loginrec.h */ | |
738 | switch (li->type) { | |
739 | case LTYPE_LOGIN: | |
740 | utx->ut_type = USER_PROCESS; | |
741 | break; | |
742 | case LTYPE_LOGOUT: | |
743 | utx->ut_type = DEAD_PROCESS; | |
744 | break; | |
745 | } | |
1d7b9b20 | 746 | line_stripname(utx->ut_line, li->line, sizeof(utx->ut_line)); |
1d7b9b20 | 747 | set_utmpx_time(li, utx); |
5abcdf8e | 748 | utx->ut_pid = li->pid; |
fa64c868 | 749 | |
f3837bc6 | 750 | /* strncpy(): Don't necessarily want null termination */ |
fa64c868 | 751 | strncpy(utx->ut_name, li->username, |
752 | MIN_SIZEOF(utx->ut_name, li->username)); | |
5abcdf8e | 753 | |
754 | if (li->type == LTYPE_LOGOUT) | |
755 | return; | |
756 | ||
a05a70ab | 757 | /* |
758 | * These fields are only used when logging in, and are blank | |
2b87da3b | 759 | * for logouts. |
a05a70ab | 760 | */ |
5abcdf8e | 761 | |
a05a70ab | 762 | # ifdef HAVE_HOST_IN_UTMPX |
fa64c868 | 763 | strncpy(utx->ut_host, li->hostname, |
764 | MIN_SIZEOF(utx->ut_host, li->hostname)); | |
a05a70ab | 765 | # endif |
766 | # ifdef HAVE_ADDR_IN_UTMPX | |
764d4113 | 767 | /* this is just a 32-bit IP address */ |
768 | if (li->hostaddr.sa.sa_family == AF_INET) | |
769 | utx->ut_addr = li->hostaddr.sa_in.sin_addr.s_addr; | |
a05a70ab | 770 | # endif |
9746ee4b | 771 | # ifdef HAVE_ADDR_V6_IN_UTMP |
772 | /* this is just a 128-bit IPv6 address */ | |
773 | if (li->hostaddr.sa.sa_family == AF_INET6) { | |
774 | sa6 = ((struct sockaddr_in6 *)&li->hostaddr.sa); | |
775 | memcpy(ut->ut_addr_v6, sa6->sin6_addr.s6_addr, 16); | |
776 | if (IN6_IS_ADDR_V4MAPPED(&sa6->sin6_addr)) { | |
777 | ut->ut_addr_v6[0] = ut->ut_addr_v6[3]; | |
778 | ut->ut_addr_v6[1] = 0; | |
779 | ut->ut_addr_v6[2] = 0; | |
780 | ut->ut_addr_v6[3] = 0; | |
781 | } | |
782 | } | |
783 | # endif | |
a05a70ab | 784 | # ifdef HAVE_SYSLEN_IN_UTMPX |
5abcdf8e | 785 | /* ut_syslen is the length of the utx_host string */ |
786 | utx->ut_syslen = MIN(strlen(li->hostname), sizeof(utx->ut_host)); | |
a05a70ab | 787 | # endif |
564dd50a | 788 | } |
a05a70ab | 789 | #endif /* USE_UTMPX || USE_WTMPX */ |
1d7b9b20 | 790 | |
791 | /** | |
564dd50a | 792 | ** Low-level utmp functions |
1d7b9b20 | 793 | **/ |
794 | ||
795 | /* FIXME: (ATL) utmp_write_direct needs testing */ | |
1d7b9b20 | 796 | #ifdef USE_UTMP |
797 | ||
1d7b9b20 | 798 | /* if we can, use pututline() etc. */ |
a05a70ab | 799 | # if !defined(DISABLE_PUTUTLINE) && defined(HAVE_SETUTENT) && \ |
800 | defined(HAVE_PUTUTLINE) | |
1d7b9b20 | 801 | # define UTMP_USE_LIBRARY |
a05a70ab | 802 | # endif |
1d7b9b20 | 803 | |
804 | ||
805 | /* write a utmp entry with the system's help (pututline() and pals) */ | |
a05a70ab | 806 | # ifdef UTMP_USE_LIBRARY |
1d7b9b20 | 807 | static int |
564dd50a | 808 | utmp_write_library(struct logininfo *li, struct utmp *ut) |
809 | { | |
1d7b9b20 | 810 | setutent(); |
811 | pututline(ut); | |
a05a70ab | 812 | # ifdef HAVE_ENDUTENT |
1d7b9b20 | 813 | endutent(); |
a05a70ab | 814 | # endif |
fa64c868 | 815 | return (1); |
564dd50a | 816 | } |
a05a70ab | 817 | # else /* UTMP_USE_LIBRARY */ |
1d7b9b20 | 818 | |
d1cf9a87 | 819 | /* |
fa64c868 | 820 | * Write a utmp entry direct to the file |
821 | * This is a slightly modification of code in OpenBSD's login.c | |
822 | */ | |
1d7b9b20 | 823 | static int |
564dd50a | 824 | utmp_write_direct(struct logininfo *li, struct utmp *ut) |
825 | { | |
1d7b9b20 | 826 | struct utmp old_ut; |
827 | register int fd; | |
828 | int tty; | |
829 | ||
5abcdf8e | 830 | /* FIXME: (ATL) ttyslot() needs local implementation */ |
dbaa2e87 | 831 | |
698d107e | 832 | #if defined(HAVE_GETTTYENT) |
fa64c868 | 833 | struct ttyent *ty; |
dbaa2e87 | 834 | |
835 | tty=0; | |
dbaa2e87 | 836 | setttyent(); |
fa64c868 | 837 | while (NULL != (ty = getttyent())) { |
dbaa2e87 | 838 | tty++; |
839 | if (!strncmp(ty->ty_name, ut->ut_line, sizeof(ut->ut_line))) | |
840 | break; | |
841 | } | |
842 | endttyent(); | |
843 | ||
fa64c868 | 844 | if (NULL == ty) { |
5f12e050 | 845 | logit("%s: tty not found", __func__); |
846 | return (0); | |
dbaa2e87 | 847 | } |
848 | #else /* FIXME */ | |
849 | ||
1d7b9b20 | 850 | tty = ttyslot(); /* seems only to work for /dev/ttyp? style names */ |
851 | ||
698d107e | 852 | #endif /* HAVE_GETTTYENT */ |
dbaa2e87 | 853 | |
1d7b9b20 | 854 | if (tty > 0 && (fd = open(UTMP_FILE, O_RDWR|O_CREAT, 0644)) >= 0) { |
5f12e050 | 855 | off_t pos, ret; |
856 | ||
857 | pos = (off_t)tty * sizeof(struct utmp); | |
858 | if ((ret = lseek(fd, pos, SEEK_SET)) == -1) { | |
f6d20d59 | 859 | logit("%s: lseek: %s", __func__, strerror(errno)); |
5f12e050 | 860 | return (0); |
861 | } | |
862 | if (ret != pos) { | |
d1cf9a87 | 863 | logit("%s: Couldn't seek to tty %d slot in %s", |
f6d20d59 | 864 | __func__, tty, UTMP_FILE); |
5f12e050 | 865 | return (0); |
866 | } | |
1d7b9b20 | 867 | /* |
868 | * Prevent luser from zero'ing out ut_host. | |
869 | * If the new ut_line is empty but the old one is not | |
dc2a6d09 | 870 | * and ut_line and ut_name match, preserve the old ut_line. |
1d7b9b20 | 871 | */ |
2b87da3b | 872 | if (atomicio(read, fd, &old_ut, sizeof(old_ut)) == sizeof(old_ut) && |
fa64c868 | 873 | (ut->ut_host[0] == '\0') && (old_ut.ut_host[0] != '\0') && |
874 | (strncmp(old_ut.ut_line, ut->ut_line, sizeof(ut->ut_line)) == 0) && | |
875 | (strncmp(old_ut.ut_name, ut->ut_name, sizeof(ut->ut_name)) == 0)) | |
876 | memcpy(ut->ut_host, old_ut.ut_host, sizeof(ut->ut_host)); | |
2b87da3b | 877 | |
5f12e050 | 878 | if ((ret = lseek(fd, pos, SEEK_SET)) == -1) { |
f6d20d59 | 879 | logit("%s: lseek: %s", __func__, strerror(errno)); |
5f12e050 | 880 | return (0); |
881 | } | |
882 | if (ret != pos) { | |
f6d20d59 | 883 | logit("%s: Couldn't seek to tty %d slot in %s", |
5f12e050 | 884 | __func__, tty, UTMP_FILE); |
885 | return (0); | |
886 | } | |
fa64c868 | 887 | if (atomicio(vwrite, fd, ut, sizeof(*ut)) != sizeof(*ut)) { |
5f12e050 | 888 | logit("%s: error writing %s: %s", __func__, |
5abcdf8e | 889 | UTMP_FILE, strerror(errno)); |
fa64c868 | 890 | } |
2b87da3b | 891 | |
fa64c868 | 892 | close(fd); |
893 | return (1); | |
9f32ceb4 | 894 | } else { |
fa64c868 | 895 | return (0); |
9f32ceb4 | 896 | } |
564dd50a | 897 | } |
a05a70ab | 898 | # endif /* UTMP_USE_LIBRARY */ |
1d7b9b20 | 899 | |
900 | static int | |
564dd50a | 901 | utmp_perform_login(struct logininfo *li) |
902 | { | |
1d7b9b20 | 903 | struct utmp ut; |
904 | ||
905 | construct_utmp(li, &ut); | |
a05a70ab | 906 | # ifdef UTMP_USE_LIBRARY |
1d7b9b20 | 907 | if (!utmp_write_library(li, &ut)) { |
a233586b | 908 | logit("%s: utmp_write_library() failed", __func__); |
fa64c868 | 909 | return (0); |
1d7b9b20 | 910 | } |
a05a70ab | 911 | # else |
1d7b9b20 | 912 | if (!utmp_write_direct(li, &ut)) { |
a233586b | 913 | logit("%s: utmp_write_direct() failed", __func__); |
fa64c868 | 914 | return (0); |
1d7b9b20 | 915 | } |
a05a70ab | 916 | # endif |
fa64c868 | 917 | return (1); |
564dd50a | 918 | } |
1d7b9b20 | 919 | |
920 | ||
921 | static int | |
564dd50a | 922 | utmp_perform_logout(struct logininfo *li) |
923 | { | |
1d7b9b20 | 924 | struct utmp ut; |
925 | ||
5abcdf8e | 926 | construct_utmp(li, &ut); |
a05a70ab | 927 | # ifdef UTMP_USE_LIBRARY |
5abcdf8e | 928 | if (!utmp_write_library(li, &ut)) { |
a233586b | 929 | logit("%s: utmp_write_library() failed", __func__); |
fa64c868 | 930 | return (0); |
5abcdf8e | 931 | } |
a05a70ab | 932 | # else |
5abcdf8e | 933 | if (!utmp_write_direct(li, &ut)) { |
a233586b | 934 | logit("%s: utmp_write_direct() failed", __func__); |
fa64c868 | 935 | return (0); |
5abcdf8e | 936 | } |
a05a70ab | 937 | # endif |
fa64c868 | 938 | return (1); |
564dd50a | 939 | } |
1d7b9b20 | 940 | |
941 | ||
942 | int | |
564dd50a | 943 | utmp_write_entry(struct logininfo *li) |
944 | { | |
1d7b9b20 | 945 | switch(li->type) { |
946 | case LTYPE_LOGIN: | |
fa64c868 | 947 | return (utmp_perform_login(li)); |
1d7b9b20 | 948 | |
949 | case LTYPE_LOGOUT: | |
fa64c868 | 950 | return (utmp_perform_logout(li)); |
1d7b9b20 | 951 | |
952 | default: | |
a233586b | 953 | logit("%s: invalid type field", __func__); |
fa64c868 | 954 | return (0); |
1d7b9b20 | 955 | } |
564dd50a | 956 | } |
a05a70ab | 957 | #endif /* USE_UTMP */ |
1d7b9b20 | 958 | |
959 | ||
960 | /** | |
564dd50a | 961 | ** Low-level utmpx functions |
1d7b9b20 | 962 | **/ |
963 | ||
964 | /* not much point if we don't want utmpx entries */ | |
965 | #ifdef USE_UTMPX | |
966 | ||
1d7b9b20 | 967 | /* if we have the wherewithall, use pututxline etc. */ |
a05a70ab | 968 | # if !defined(DISABLE_PUTUTXLINE) && defined(HAVE_SETUTXENT) && \ |
969 | defined(HAVE_PUTUTXLINE) | |
1d7b9b20 | 970 | # define UTMPX_USE_LIBRARY |
a05a70ab | 971 | # endif |
1d7b9b20 | 972 | |
973 | ||
974 | /* write a utmpx entry with the system's help (pututxline() and pals) */ | |
a05a70ab | 975 | # ifdef UTMPX_USE_LIBRARY |
1d7b9b20 | 976 | static int |
564dd50a | 977 | utmpx_write_library(struct logininfo *li, struct utmpx *utx) |
978 | { | |
1d7b9b20 | 979 | setutxent(); |
980 | pututxline(utx); | |
981 | ||
a05a70ab | 982 | # ifdef HAVE_ENDUTXENT |
1d7b9b20 | 983 | endutxent(); |
a05a70ab | 984 | # endif |
fa64c868 | 985 | return (1); |
564dd50a | 986 | } |
1d7b9b20 | 987 | |
a05a70ab | 988 | # else /* UTMPX_USE_LIBRARY */ |
1d7b9b20 | 989 | |
990 | /* write a utmp entry direct to the file */ | |
991 | static int | |
564dd50a | 992 | utmpx_write_direct(struct logininfo *li, struct utmpx *utx) |
2b87da3b | 993 | { |
a233586b | 994 | logit("%s: not implemented!", __func__); |
fa64c868 | 995 | return (0); |
564dd50a | 996 | } |
a05a70ab | 997 | # endif /* UTMPX_USE_LIBRARY */ |
1d7b9b20 | 998 | |
999 | static int | |
564dd50a | 1000 | utmpx_perform_login(struct logininfo *li) |
1001 | { | |
1d7b9b20 | 1002 | struct utmpx utx; |
1003 | ||
1004 | construct_utmpx(li, &utx); | |
a05a70ab | 1005 | # ifdef UTMPX_USE_LIBRARY |
1d7b9b20 | 1006 | if (!utmpx_write_library(li, &utx)) { |
a233586b | 1007 | logit("%s: utmp_write_library() failed", __func__); |
fa64c868 | 1008 | return (0); |
1d7b9b20 | 1009 | } |
a05a70ab | 1010 | # else |
1d7b9b20 | 1011 | if (!utmpx_write_direct(li, &ut)) { |
a233586b | 1012 | logit("%s: utmp_write_direct() failed", __func__); |
fa64c868 | 1013 | return (0); |
1d7b9b20 | 1014 | } |
a05a70ab | 1015 | # endif |
fa64c868 | 1016 | return (1); |
564dd50a | 1017 | } |
1d7b9b20 | 1018 | |
1019 | ||
1020 | static int | |
564dd50a | 1021 | utmpx_perform_logout(struct logininfo *li) |
1022 | { | |
1d7b9b20 | 1023 | struct utmpx utx; |
1024 | ||
f3837bc6 | 1025 | construct_utmpx(li, &utx); |
a05a70ab | 1026 | # ifdef HAVE_ID_IN_UTMPX |
1d7b9b20 | 1027 | line_abbrevname(utx.ut_id, li->line, sizeof(utx.ut_id)); |
a05a70ab | 1028 | # endif |
1029 | # ifdef HAVE_TYPE_IN_UTMPX | |
1d7b9b20 | 1030 | utx.ut_type = DEAD_PROCESS; |
a05a70ab | 1031 | # endif |
1d7b9b20 | 1032 | |
a05a70ab | 1033 | # ifdef UTMPX_USE_LIBRARY |
1d7b9b20 | 1034 | utmpx_write_library(li, &utx); |
a05a70ab | 1035 | # else |
1d7b9b20 | 1036 | utmpx_write_direct(li, &utx); |
a05a70ab | 1037 | # endif |
fa64c868 | 1038 | return (1); |
564dd50a | 1039 | } |
1d7b9b20 | 1040 | |
1d7b9b20 | 1041 | int |
564dd50a | 1042 | utmpx_write_entry(struct logininfo *li) |
1043 | { | |
1d7b9b20 | 1044 | switch(li->type) { |
1045 | case LTYPE_LOGIN: | |
fa64c868 | 1046 | return (utmpx_perform_login(li)); |
1d7b9b20 | 1047 | case LTYPE_LOGOUT: |
fa64c868 | 1048 | return (utmpx_perform_logout(li)); |
1d7b9b20 | 1049 | default: |
a233586b | 1050 | logit("%s: invalid type field", __func__); |
fa64c868 | 1051 | return (0); |
1d7b9b20 | 1052 | } |
564dd50a | 1053 | } |
a05a70ab | 1054 | #endif /* USE_UTMPX */ |
1d7b9b20 | 1055 | |
1056 | ||
1057 | /** | |
564dd50a | 1058 | ** Low-level wtmp functions |
1d7b9b20 | 1059 | **/ |
1060 | ||
2b87da3b | 1061 | #ifdef USE_WTMP |
1d7b9b20 | 1062 | |
d1cf9a87 | 1063 | /* |
fa64c868 | 1064 | * Write a wtmp entry direct to the end of the file |
1065 | * This is a slight modification of code in OpenBSD's logwtmp.c | |
1066 | */ | |
1d7b9b20 | 1067 | static int |
564dd50a | 1068 | wtmp_write(struct logininfo *li, struct utmp *ut) |
1069 | { | |
1d7b9b20 | 1070 | struct stat buf; |
1071 | int fd, ret = 1; | |
1072 | ||
1073 | if ((fd = open(WTMP_FILE, O_WRONLY|O_APPEND, 0)) < 0) { | |
a233586b | 1074 | logit("%s: problem writing %s: %s", __func__, |
1d7b9b20 | 1075 | WTMP_FILE, strerror(errno)); |
fa64c868 | 1076 | return (0); |
1d7b9b20 | 1077 | } |
2b87da3b | 1078 | if (fstat(fd, &buf) == 0) |
d72f7b79 | 1079 | if (atomicio(vwrite, fd, ut, sizeof(*ut)) != sizeof(*ut)) { |
1d7b9b20 | 1080 | ftruncate(fd, buf.st_size); |
a233586b | 1081 | logit("%s: problem writing %s: %s", __func__, |
1d7b9b20 | 1082 | WTMP_FILE, strerror(errno)); |
1083 | ret = 0; | |
1084 | } | |
fa64c868 | 1085 | close(fd); |
1086 | return (ret); | |
564dd50a | 1087 | } |
1d7b9b20 | 1088 | |
1d7b9b20 | 1089 | static int |
a05a70ab | 1090 | wtmp_perform_login(struct logininfo *li) |
1091 | { | |
1d7b9b20 | 1092 | struct utmp ut; |
1093 | ||
1094 | construct_utmp(li, &ut); | |
fa64c868 | 1095 | return (wtmp_write(li, &ut)); |
564dd50a | 1096 | } |
1d7b9b20 | 1097 | |
1098 | ||
1099 | static int | |
564dd50a | 1100 | wtmp_perform_logout(struct logininfo *li) |
1101 | { | |
1d7b9b20 | 1102 | struct utmp ut; |
1103 | ||
1104 | construct_utmp(li, &ut); | |
fa64c868 | 1105 | return (wtmp_write(li, &ut)); |
564dd50a | 1106 | } |
1d7b9b20 | 1107 | |
1108 | ||
1109 | int | |
564dd50a | 1110 | wtmp_write_entry(struct logininfo *li) |
1111 | { | |
1d7b9b20 | 1112 | switch(li->type) { |
1113 | case LTYPE_LOGIN: | |
fa64c868 | 1114 | return (wtmp_perform_login(li)); |
1d7b9b20 | 1115 | case LTYPE_LOGOUT: |
fa64c868 | 1116 | return (wtmp_perform_logout(li)); |
1d7b9b20 | 1117 | default: |
a233586b | 1118 | logit("%s: invalid type field", __func__); |
fa64c868 | 1119 | return (0); |
1d7b9b20 | 1120 | } |
564dd50a | 1121 | } |
1d7b9b20 | 1122 | |
1123 | ||
d1cf9a87 | 1124 | /* |
fa64c868 | 1125 | * Notes on fetching login data from wtmp/wtmpx |
2b87da3b | 1126 | * |
5abcdf8e | 1127 | * Logouts are usually recorded with (amongst other things) a blank |
1128 | * username on a given tty line. However, some systems (HP-UX is one) | |
1129 | * leave all fields set, but change the ut_type field to DEAD_PROCESS. | |
1130 | * | |
1131 | * Since we're only looking for logins here, we know that the username | |
1132 | * must be set correctly. On systems that leave it in, we check for | |
1133 | * ut_type==USER_PROCESS (indicating a login.) | |
1134 | * | |
1135 | * Portability: Some systems may set something other than USER_PROCESS | |
1136 | * to indicate a login process. I don't know of any as I write. Also, | |
1137 | * it's possible that some systems may both leave the username in | |
1138 | * place and not have ut_type. | |
1139 | */ | |
1140 | ||
5abcdf8e | 1141 | /* return true if this wtmp entry indicates a login */ |
1142 | static int | |
1143 | wtmp_islogin(struct logininfo *li, struct utmp *ut) | |
1144 | { | |
2b87da3b | 1145 | if (strncmp(li->username, ut->ut_name, |
fa64c868 | 1146 | MIN_SIZEOF(li->username, ut->ut_name)) == 0) { |
a05a70ab | 1147 | # ifdef HAVE_TYPE_IN_UTMP |
5abcdf8e | 1148 | if (ut->ut_type & USER_PROCESS) |
fa64c868 | 1149 | return (1); |
a05a70ab | 1150 | # else |
fa64c868 | 1151 | return (1); |
a05a70ab | 1152 | # endif |
5abcdf8e | 1153 | } |
fa64c868 | 1154 | return (0); |
5abcdf8e | 1155 | } |
1156 | ||
1d7b9b20 | 1157 | int |
564dd50a | 1158 | wtmp_get_entry(struct logininfo *li) |
1159 | { | |
1d7b9b20 | 1160 | struct stat st; |
1161 | struct utmp ut; | |
fa64c868 | 1162 | int fd, found = 0; |
5abcdf8e | 1163 | |
1164 | /* Clear the time entries in our logininfo */ | |
1165 | li->tv_sec = li->tv_usec = 0; | |
1d7b9b20 | 1166 | |
1167 | if ((fd = open(WTMP_FILE, O_RDONLY)) < 0) { | |
d1cf9a87 | 1168 | logit("%s: problem opening %s: %s", __func__, |
1d7b9b20 | 1169 | WTMP_FILE, strerror(errno)); |
fa64c868 | 1170 | return (0); |
1d7b9b20 | 1171 | } |
2b87da3b | 1172 | if (fstat(fd, &st) != 0) { |
d1cf9a87 | 1173 | logit("%s: couldn't stat %s: %s", __func__, |
1d7b9b20 | 1174 | WTMP_FILE, strerror(errno)); |
1175 | close(fd); | |
fa64c868 | 1176 | return (0); |
1d7b9b20 | 1177 | } |
1d7b9b20 | 1178 | |
5abcdf8e | 1179 | /* Seek to the start of the last struct utmp */ |
d9d47a26 | 1180 | if (lseek(fd, -(off_t)sizeof(struct utmp), SEEK_END) == -1) { |
5abcdf8e | 1181 | /* Looks like we've got a fresh wtmp file */ |
1182 | close(fd); | |
fa64c868 | 1183 | return (0); |
5abcdf8e | 1184 | } |
1185 | ||
1186 | while (!found) { | |
9f32ceb4 | 1187 | if (atomicio(read, fd, &ut, sizeof(ut)) != sizeof(ut)) { |
d1cf9a87 | 1188 | logit("%s: read of %s failed: %s", __func__, |
1d7b9b20 | 1189 | WTMP_FILE, strerror(errno)); |
1190 | close (fd); | |
fa64c868 | 1191 | return (0); |
1d7b9b20 | 1192 | } |
5abcdf8e | 1193 | if ( wtmp_islogin(li, &ut) ) { |
1194 | found = 1; | |
fa64c868 | 1195 | /* |
1196 | * We've already checked for a time in struct | |
1197 | * utmp, in login_getlast() | |
1198 | */ | |
a05a70ab | 1199 | # ifdef HAVE_TIME_IN_UTMP |
1d7b9b20 | 1200 | li->tv_sec = ut.ut_time; |
a05a70ab | 1201 | # else |
1d7b9b20 | 1202 | # if HAVE_TV_IN_UTMP |
1203 | li->tv_sec = ut.ut_tv.tv_sec; | |
1204 | # endif | |
a05a70ab | 1205 | # endif |
5abcdf8e | 1206 | line_fullname(li->line, ut.ut_line, |
fa64c868 | 1207 | MIN_SIZEOF(li->line, ut.ut_line)); |
a05a70ab | 1208 | # ifdef HAVE_HOST_IN_UTMP |
5abcdf8e | 1209 | strlcpy(li->hostname, ut.ut_host, |
fa64c868 | 1210 | MIN_SIZEOF(li->hostname, ut.ut_host)); |
a05a70ab | 1211 | # endif |
5abcdf8e | 1212 | continue; |
1d7b9b20 | 1213 | } |
5abcdf8e | 1214 | /* Seek back 2 x struct utmp */ |
d9d47a26 | 1215 | if (lseek(fd, -(off_t)(2 * sizeof(struct utmp)), SEEK_CUR) == -1) { |
5abcdf8e | 1216 | /* We've found the start of the file, so quit */ |
fa64c868 | 1217 | close(fd); |
1218 | return (0); | |
1d7b9b20 | 1219 | } |
5abcdf8e | 1220 | } |
1221 | ||
1222 | /* We found an entry. Tidy up and return */ | |
1223 | close(fd); | |
fa64c868 | 1224 | return (1); |
564dd50a | 1225 | } |
a05a70ab | 1226 | # endif /* USE_WTMP */ |
1d7b9b20 | 1227 | |
1228 | ||
1229 | /** | |
564dd50a | 1230 | ** Low-level wtmpx functions |
1d7b9b20 | 1231 | **/ |
1232 | ||
1233 | #ifdef USE_WTMPX | |
fa64c868 | 1234 | /* |
1235 | * Write a wtmpx entry direct to the end of the file | |
1236 | * This is a slight modification of code in OpenBSD's logwtmp.c | |
1237 | */ | |
1d7b9b20 | 1238 | static int |
564dd50a | 1239 | wtmpx_write(struct logininfo *li, struct utmpx *utx) |
1240 | { | |
41c64c91 | 1241 | #ifndef HAVE_UPDWTMPX |
1d7b9b20 | 1242 | struct stat buf; |
1243 | int fd, ret = 1; | |
1244 | ||
1245 | if ((fd = open(WTMPX_FILE, O_WRONLY|O_APPEND, 0)) < 0) { | |
d1cf9a87 | 1246 | logit("%s: problem opening %s: %s", __func__, |
1d7b9b20 | 1247 | WTMPX_FILE, strerror(errno)); |
fa64c868 | 1248 | return (0); |
1d7b9b20 | 1249 | } |
1250 | ||
2b87da3b | 1251 | if (fstat(fd, &buf) == 0) |
d72f7b79 | 1252 | if (atomicio(vwrite, fd, utx, sizeof(*utx)) != sizeof(*utx)) { |
1d7b9b20 | 1253 | ftruncate(fd, buf.st_size); |
a233586b | 1254 | logit("%s: problem writing %s: %s", __func__, |
1d7b9b20 | 1255 | WTMPX_FILE, strerror(errno)); |
1256 | ret = 0; | |
1257 | } | |
fa64c868 | 1258 | close(fd); |
1d7b9b20 | 1259 | |
fa64c868 | 1260 | return (ret); |
41c64c91 | 1261 | #else |
1262 | updwtmpx(WTMPX_FILE, utx); | |
fa64c868 | 1263 | return (1); |
41c64c91 | 1264 | #endif |
564dd50a | 1265 | } |
1d7b9b20 | 1266 | |
1267 | ||
1268 | static int | |
564dd50a | 1269 | wtmpx_perform_login(struct logininfo *li) |
1270 | { | |
1d7b9b20 | 1271 | struct utmpx utx; |
1272 | ||
1273 | construct_utmpx(li, &utx); | |
fa64c868 | 1274 | return (wtmpx_write(li, &utx)); |
564dd50a | 1275 | } |
1d7b9b20 | 1276 | |
1277 | ||
1278 | static int | |
564dd50a | 1279 | wtmpx_perform_logout(struct logininfo *li) |
1280 | { | |
1d7b9b20 | 1281 | struct utmpx utx; |
1282 | ||
1283 | construct_utmpx(li, &utx); | |
fa64c868 | 1284 | return (wtmpx_write(li, &utx)); |
564dd50a | 1285 | } |
1d7b9b20 | 1286 | |
1287 | ||
1288 | int | |
564dd50a | 1289 | wtmpx_write_entry(struct logininfo *li) |
1290 | { | |
1d7b9b20 | 1291 | switch(li->type) { |
1292 | case LTYPE_LOGIN: | |
fa64c868 | 1293 | return (wtmpx_perform_login(li)); |
1d7b9b20 | 1294 | case LTYPE_LOGOUT: |
fa64c868 | 1295 | return (wtmpx_perform_logout(li)); |
1d7b9b20 | 1296 | default: |
a233586b | 1297 | logit("%s: invalid type field", __func__); |
fa64c868 | 1298 | return (0); |
1d7b9b20 | 1299 | } |
564dd50a | 1300 | } |
1d7b9b20 | 1301 | |
5abcdf8e | 1302 | /* Please see the notes above wtmp_islogin() for information about the |
1303 | next two functions */ | |
1304 | ||
1305 | /* Return true if this wtmpx entry indicates a login */ | |
1306 | static int | |
1307 | wtmpx_islogin(struct logininfo *li, struct utmpx *utx) | |
1308 | { | |
fa64c868 | 1309 | if (strncmp(li->username, utx->ut_name, |
1310 | MIN_SIZEOF(li->username, utx->ut_name)) == 0 ) { | |
a05a70ab | 1311 | # ifdef HAVE_TYPE_IN_UTMPX |
5abcdf8e | 1312 | if (utx->ut_type == USER_PROCESS) |
fa64c868 | 1313 | return (1); |
a05a70ab | 1314 | # else |
fa64c868 | 1315 | return (1); |
a05a70ab | 1316 | # endif |
5abcdf8e | 1317 | } |
fa64c868 | 1318 | return (0); |
5abcdf8e | 1319 | } |
1320 | ||
1d7b9b20 | 1321 | |
1322 | int | |
564dd50a | 1323 | wtmpx_get_entry(struct logininfo *li) |
1324 | { | |
1d7b9b20 | 1325 | struct stat st; |
1326 | struct utmpx utx; | |
5abcdf8e | 1327 | int fd, found=0; |
1328 | ||
1329 | /* Clear the time entries */ | |
1330 | li->tv_sec = li->tv_usec = 0; | |
1d7b9b20 | 1331 | |
1332 | if ((fd = open(WTMPX_FILE, O_RDONLY)) < 0) { | |
d1cf9a87 | 1333 | logit("%s: problem opening %s: %s", __func__, |
1d7b9b20 | 1334 | WTMPX_FILE, strerror(errno)); |
fa64c868 | 1335 | return (0); |
1d7b9b20 | 1336 | } |
2b87da3b | 1337 | if (fstat(fd, &st) != 0) { |
d1cf9a87 | 1338 | logit("%s: couldn't stat %s: %s", __func__, |
fdebdd4f | 1339 | WTMPX_FILE, strerror(errno)); |
1d7b9b20 | 1340 | close(fd); |
fa64c868 | 1341 | return (0); |
1d7b9b20 | 1342 | } |
2b87da3b | 1343 | |
5abcdf8e | 1344 | /* Seek to the start of the last struct utmpx */ |
d9d47a26 | 1345 | if (lseek(fd, -(off_t)sizeof(struct utmpx), SEEK_END) == -1 ) { |
5abcdf8e | 1346 | /* probably a newly rotated wtmpx file */ |
1347 | close(fd); | |
fa64c868 | 1348 | return (0); |
5abcdf8e | 1349 | } |
1d7b9b20 | 1350 | |
5abcdf8e | 1351 | while (!found) { |
9f32ceb4 | 1352 | if (atomicio(read, fd, &utx, sizeof(utx)) != sizeof(utx)) { |
d1cf9a87 | 1353 | logit("%s: read of %s failed: %s", __func__, |
1d7b9b20 | 1354 | WTMPX_FILE, strerror(errno)); |
1355 | close (fd); | |
fa64c868 | 1356 | return (0); |
1d7b9b20 | 1357 | } |
fa64c868 | 1358 | /* |
d1cf9a87 | 1359 | * Logouts are recorded as a blank username on a particular |
fa64c868 | 1360 | * line. So, we just need to find the username in struct utmpx |
1361 | */ | |
1362 | if (wtmpx_islogin(li, &utx)) { | |
d80063fe | 1363 | found = 1; |
fa64c868 | 1364 | # if defined(HAVE_TV_IN_UTMPX) |
1d7b9b20 | 1365 | li->tv_sec = utx.ut_tv.tv_sec; |
fa64c868 | 1366 | # elif defined(HAVE_TIME_IN_UTMPX) |
1d7b9b20 | 1367 | li->tv_sec = utx.ut_time; |
a05a70ab | 1368 | # endif |
a4d05724 | 1369 | line_fullname(li->line, utx.ut_line, sizeof(li->line)); |
fa64c868 | 1370 | # if defined(HAVE_HOST_IN_UTMPX) |
5abcdf8e | 1371 | strlcpy(li->hostname, utx.ut_host, |
fa64c868 | 1372 | MIN_SIZEOF(li->hostname, utx.ut_host)); |
a05a70ab | 1373 | # endif |
5abcdf8e | 1374 | continue; |
1d7b9b20 | 1375 | } |
d9d47a26 | 1376 | if (lseek(fd, -(off_t)(2 * sizeof(struct utmpx)), SEEK_CUR) == -1) { |
fa64c868 | 1377 | close(fd); |
1378 | return (0); | |
1d7b9b20 | 1379 | } |
5abcdf8e | 1380 | } |
1381 | ||
1382 | close(fd); | |
fa64c868 | 1383 | return (1); |
564dd50a | 1384 | } |
f988dce5 | 1385 | #endif /* USE_WTMPX */ |
1d7b9b20 | 1386 | |
1d7b9b20 | 1387 | /** |
564dd50a | 1388 | ** Low-level libutil login() functions |
1d7b9b20 | 1389 | **/ |
1390 | ||
1391 | #ifdef USE_LOGIN | |
1d7b9b20 | 1392 | static int |
564dd50a | 1393 | syslogin_perform_login(struct logininfo *li) |
1394 | { | |
1d7b9b20 | 1395 | struct utmp *ut; |
1396 | ||
7a52470e | 1397 | ut = xmalloc(sizeof(*ut)); |
1d7b9b20 | 1398 | construct_utmp(li, ut); |
1399 | login(ut); | |
6cef88bc | 1400 | free(ut); |
1d7b9b20 | 1401 | |
fa64c868 | 1402 | return (1); |
564dd50a | 1403 | } |
1d7b9b20 | 1404 | |
564dd50a | 1405 | static int |
1406 | syslogin_perform_logout(struct logininfo *li) | |
1407 | { | |
a05a70ab | 1408 | # ifdef HAVE_LOGOUT |
f20d4564 | 1409 | char line[UT_LINESIZE]; |
2b87da3b | 1410 | |
1d7b9b20 | 1411 | (void)line_stripname(line, li->line, sizeof(line)); |
1412 | ||
fa64c868 | 1413 | if (!logout(line)) |
a233586b | 1414 | logit("%s: logout() returned an error", __func__); |
a05a70ab | 1415 | # ifdef HAVE_LOGWTMP |
fa64c868 | 1416 | else |
1d7b9b20 | 1417 | logwtmp(line, "", ""); |
a05a70ab | 1418 | # endif |
5abcdf8e | 1419 | /* FIXME: (ATL - if the need arises) What to do if we have |
1420 | * login, but no logout? what if logout but no logwtmp? All | |
1421 | * routines are in libutil so they should all be there, | |
1422 | * but... */ | |
a05a70ab | 1423 | # endif |
fa64c868 | 1424 | return (1); |
564dd50a | 1425 | } |
1d7b9b20 | 1426 | |
1d7b9b20 | 1427 | int |
564dd50a | 1428 | syslogin_write_entry(struct logininfo *li) |
1429 | { | |
1d7b9b20 | 1430 | switch (li->type) { |
1431 | case LTYPE_LOGIN: | |
fa64c868 | 1432 | return (syslogin_perform_login(li)); |
1d7b9b20 | 1433 | case LTYPE_LOGOUT: |
fa64c868 | 1434 | return (syslogin_perform_logout(li)); |
1d7b9b20 | 1435 | default: |
a233586b | 1436 | logit("%s: Invalid type field", __func__); |
fa64c868 | 1437 | return (0); |
1d7b9b20 | 1438 | } |
564dd50a | 1439 | } |
f988dce5 | 1440 | #endif /* USE_LOGIN */ |
1d7b9b20 | 1441 | |
1442 | /* end of file log-syslogin.c */ | |
1443 | ||
1d7b9b20 | 1444 | /** |
564dd50a | 1445 | ** Low-level lastlog functions |
1d7b9b20 | 1446 | **/ |
1447 | ||
1448 | #ifdef USE_LASTLOG | |
a05a70ab | 1449 | #define LL_FILE 1 |
1450 | #define LL_DIR 2 | |
1451 | #define LL_OTHER 3 | |
1d7b9b20 | 1452 | |
1d7b9b20 | 1453 | static void |
564dd50a | 1454 | lastlog_construct(struct logininfo *li, struct lastlog *last) |
1455 | { | |
1d7b9b20 | 1456 | /* clear the structure */ |
dbaa2e87 | 1457 | memset(last, '\0', sizeof(*last)); |
2b87da3b | 1458 | |
fa64c868 | 1459 | line_stripname(last->ll_line, li->line, sizeof(last->ll_line)); |
5abcdf8e | 1460 | strlcpy(last->ll_host, li->hostname, |
1461 | MIN_SIZEOF(last->ll_host, li->hostname)); | |
1d7b9b20 | 1462 | last->ll_time = li->tv_sec; |
564dd50a | 1463 | } |
1d7b9b20 | 1464 | |
1d7b9b20 | 1465 | static int |
564dd50a | 1466 | lastlog_filetype(char *filename) |
1467 | { | |
1d7b9b20 | 1468 | struct stat st; |
1469 | ||
a05a70ab | 1470 | if (stat(LASTLOG_FILE, &st) != 0) { |
a233586b | 1471 | logit("%s: Couldn't stat %s: %s", __func__, |
fa64c868 | 1472 | LASTLOG_FILE, strerror(errno)); |
1473 | return (0); | |
1d7b9b20 | 1474 | } |
1d7b9b20 | 1475 | if (S_ISDIR(st.st_mode)) |
fa64c868 | 1476 | return (LL_DIR); |
1d7b9b20 | 1477 | else if (S_ISREG(st.st_mode)) |
fa64c868 | 1478 | return (LL_FILE); |
1d7b9b20 | 1479 | else |
fa64c868 | 1480 | return (LL_OTHER); |
564dd50a | 1481 | } |
1d7b9b20 | 1482 | |
1483 | ||
1484 | /* open the file (using filemode) and seek to the login entry */ | |
1485 | static int | |
564dd50a | 1486 | lastlog_openseek(struct logininfo *li, int *fd, int filemode) |
1487 | { | |
1d7b9b20 | 1488 | off_t offset; |
1489 | int type; | |
1490 | char lastlog_file[1024]; | |
1491 | ||
1492 | type = lastlog_filetype(LASTLOG_FILE); | |
1493 | switch (type) { | |
fa64c868 | 1494 | case LL_FILE: |
1495 | strlcpy(lastlog_file, LASTLOG_FILE, | |
1496 | sizeof(lastlog_file)); | |
1497 | break; | |
1498 | case LL_DIR: | |
1499 | snprintf(lastlog_file, sizeof(lastlog_file), "%s/%s", | |
1500 | LASTLOG_FILE, li->username); | |
1501 | break; | |
1502 | default: | |
a233586b | 1503 | logit("%s: %.100s is not a file or directory!", __func__, |
fa64c868 | 1504 | LASTLOG_FILE); |
1505 | return (0); | |
a05a70ab | 1506 | } |
1d7b9b20 | 1507 | |
ee476051 | 1508 | *fd = open(lastlog_file, filemode, 0600); |
fa64c868 | 1509 | if (*fd < 0) { |
a233586b | 1510 | debug("%s: Couldn't open %s: %s", __func__, |
1d7b9b20 | 1511 | lastlog_file, strerror(errno)); |
fa64c868 | 1512 | return (0); |
1d7b9b20 | 1513 | } |
2b87da3b | 1514 | |
d93a7e5a | 1515 | if (type == LL_FILE) { |
1516 | /* find this uid's offset in the lastlog file */ | |
d9d47a26 | 1517 | offset = (off_t) ((long)li->uid * sizeof(struct lastlog)); |
1d7b9b20 | 1518 | |
fa64c868 | 1519 | if (lseek(*fd, offset, SEEK_SET) != offset) { |
a233586b | 1520 | logit("%s: %s->lseek(): %s", __func__, |
1521 | lastlog_file, strerror(errno)); | |
fa64c868 | 1522 | return (0); |
d93a7e5a | 1523 | } |
1d7b9b20 | 1524 | } |
2b87da3b | 1525 | |
fa64c868 | 1526 | return (1); |
564dd50a | 1527 | } |
1d7b9b20 | 1528 | |
1529 | static int | |
564dd50a | 1530 | lastlog_perform_login(struct logininfo *li) |
1531 | { | |
1d7b9b20 | 1532 | struct lastlog last; |
1533 | int fd; | |
1534 | ||
1535 | /* create our struct lastlog */ | |
1536 | lastlog_construct(li, &last); | |
1537 | ||
ee476051 | 1538 | if (!lastlog_openseek(li, &fd, O_RDWR|O_CREAT)) |
fa64c868 | 1539 | return (0); |
2b87da3b | 1540 | |
1d7b9b20 | 1541 | /* write the entry */ |
d72f7b79 | 1542 | if (atomicio(vwrite, fd, &last, sizeof(last)) != sizeof(last)) { |
1a022229 | 1543 | close(fd); |
a233586b | 1544 | logit("%s: Error writing to %s: %s", __func__, |
1a022229 | 1545 | LASTLOG_FILE, strerror(errno)); |
fa64c868 | 1546 | return (0); |
a05a70ab | 1547 | } |
1a022229 | 1548 | |
1549 | close(fd); | |
fa64c868 | 1550 | return (1); |
564dd50a | 1551 | } |
1d7b9b20 | 1552 | |
1d7b9b20 | 1553 | int |
564dd50a | 1554 | lastlog_write_entry(struct logininfo *li) |
1555 | { | |
1d7b9b20 | 1556 | switch(li->type) { |
1557 | case LTYPE_LOGIN: | |
fa64c868 | 1558 | return (lastlog_perform_login(li)); |
1d7b9b20 | 1559 | default: |
a233586b | 1560 | logit("%s: Invalid type field", __func__); |
fa64c868 | 1561 | return (0); |
1d7b9b20 | 1562 | } |
564dd50a | 1563 | } |
1d7b9b20 | 1564 | |
1d7b9b20 | 1565 | static void |
564dd50a | 1566 | lastlog_populate_entry(struct logininfo *li, struct lastlog *last) |
1567 | { | |
1d7b9b20 | 1568 | line_fullname(li->line, last->ll_line, sizeof(li->line)); |
2b87da3b | 1569 | strlcpy(li->hostname, last->ll_host, |
fa64c868 | 1570 | MIN_SIZEOF(li->hostname, last->ll_host)); |
1d7b9b20 | 1571 | li->tv_sec = last->ll_time; |
564dd50a | 1572 | } |
1d7b9b20 | 1573 | |
1d7b9b20 | 1574 | int |
564dd50a | 1575 | lastlog_get_entry(struct logininfo *li) |
1576 | { | |
1d7b9b20 | 1577 | struct lastlog last; |
ed05a983 | 1578 | int fd, ret; |
1d7b9b20 | 1579 | |
ce49121d | 1580 | if (!lastlog_openseek(li, &fd, O_RDONLY)) |
ed05a983 | 1581 | return (0); |
ce49121d | 1582 | |
ed05a983 | 1583 | ret = atomicio(read, fd, &last, sizeof(last)); |
ce49121d | 1584 | close(fd); |
1585 | ||
ed05a983 | 1586 | switch (ret) { |
1587 | case 0: | |
1588 | memset(&last, '\0', sizeof(last)); | |
1589 | /* FALLTHRU */ | |
1590 | case sizeof(last): | |
1591 | lastlog_populate_entry(li, &last); | |
1592 | return (1); | |
1593 | case -1: | |
aff51935 | 1594 | error("%s: Error reading from %s: %s", __func__, |
ed05a983 | 1595 | LASTLOG_FILE, strerror(errno)); |
1596 | return (0); | |
1597 | default: | |
1598 | error("%s: Error reading from %s: Expecting %d, got %d", | |
dfde7f6e | 1599 | __func__, LASTLOG_FILE, (int)sizeof(last), ret); |
ed05a983 | 1600 | return (0); |
1601 | } | |
ce49121d | 1602 | |
ed05a983 | 1603 | /* NOTREACHED */ |
1604 | return (0); | |
564dd50a | 1605 | } |
f988dce5 | 1606 | #endif /* USE_LASTLOG */ |
b6610e8f | 1607 | |
1608 | #ifdef USE_BTMP | |
1609 | /* | |
1610 | * Logs failed login attempts in _PATH_BTMP if that exists. | |
1611 | * The most common login failure is to give password instead of username. | |
1612 | * So the _PATH_BTMP file checked for the correct permission, so that | |
1613 | * only root can read it. | |
1614 | */ | |
1615 | ||
1616 | void | |
1617 | record_failed_login(const char *username, const char *hostname, | |
1618 | const char *ttyn) | |
1619 | { | |
1620 | int fd; | |
1621 | struct utmp ut; | |
1622 | struct sockaddr_storage from; | |
dfde7f6e | 1623 | socklen_t fromlen = sizeof(from); |
b6610e8f | 1624 | struct sockaddr_in *a4; |
1625 | struct sockaddr_in6 *a6; | |
1626 | time_t t; | |
1627 | struct stat fst; | |
1628 | ||
1629 | if (geteuid() != 0) | |
1630 | return; | |
1631 | if ((fd = open(_PATH_BTMP, O_WRONLY | O_APPEND)) < 0) { | |
1632 | debug("Unable to open the btmp file %s: %s", _PATH_BTMP, | |
1633 | strerror(errno)); | |
1634 | return; | |
1635 | } | |
1636 | if (fstat(fd, &fst) < 0) { | |
1637 | logit("%s: fstat of %s failed: %s", __func__, _PATH_BTMP, | |
1638 | strerror(errno)); | |
1639 | goto out; | |
1640 | } | |
1641 | if((fst.st_mode & (S_IRWXG | S_IRWXO)) || (fst.st_uid != 0)){ | |
1642 | logit("Excess permission or bad ownership on file %s", | |
1643 | _PATH_BTMP); | |
1644 | goto out; | |
1645 | } | |
1646 | ||
1647 | memset(&ut, 0, sizeof(ut)); | |
1648 | /* strncpy because we don't necessarily want nul termination */ | |
1649 | strncpy(ut.ut_user, username, sizeof(ut.ut_user)); | |
1650 | strlcpy(ut.ut_line, "ssh:notty", sizeof(ut.ut_line)); | |
1651 | ||
1652 | time(&t); | |
1653 | ut.ut_time = t; /* ut_time is not always a time_t */ | |
1654 | ut.ut_type = LOGIN_PROCESS; | |
1655 | ut.ut_pid = getpid(); | |
1656 | ||
1657 | /* strncpy because we don't necessarily want nul termination */ | |
1658 | strncpy(ut.ut_host, hostname, sizeof(ut.ut_host)); | |
1659 | ||
1660 | if (packet_connection_is_on_socket() && | |
1661 | getpeername(packet_get_connection_in(), | |
1662 | (struct sockaddr *)&from, &fromlen) == 0) { | |
1663 | ipv64_normalise_mapped(&from, &fromlen); | |
1664 | if (from.ss_family == AF_INET) { | |
1665 | a4 = (struct sockaddr_in *)&from; | |
1666 | memcpy(&ut.ut_addr, &(a4->sin_addr), | |
1667 | MIN_SIZEOF(ut.ut_addr, a4->sin_addr)); | |
1668 | } | |
1669 | #ifdef HAVE_ADDR_V6_IN_UTMP | |
1670 | if (from.ss_family == AF_INET6) { | |
1671 | a6 = (struct sockaddr_in6 *)&from; | |
1672 | memcpy(&ut.ut_addr_v6, &(a6->sin6_addr), | |
1673 | MIN_SIZEOF(ut.ut_addr_v6, a6->sin6_addr)); | |
1674 | } | |
1675 | #endif | |
1676 | } | |
1677 | ||
1678 | if (atomicio(vwrite, fd, &ut, sizeof(ut)) != sizeof(ut)) | |
1679 | error("Failed to write to %s: %s", _PATH_BTMP, | |
1680 | strerror(errno)); | |
1681 | ||
1682 | out: | |
1683 | close(fd); | |
1684 | } | |
1685 | #endif /* USE_BTMP */ |