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