andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2000 Andre Lucas. All rights reserved. |
| 3 | * |
| 4 | * Redistribution and use in source and binary forms, with or without |
| 5 | * modification, are permitted provided that the following conditions |
| 6 | * are met: |
| 7 | * 1. Redistributions of source code must retain the above copyright |
| 8 | * notice, this list of conditions and the following disclaimer. |
| 9 | * 2. Redistributions in binary form must reproduce the above copyright |
| 10 | * notice, this list of conditions and the following disclaimer in the |
| 11 | * documentation and/or other materials provided with the distribution. |
| 12 | * 3. All advertising materials mentioning features or use of this software |
| 13 | * must display the following acknowledgement: |
| 14 | * This product includes software developed by Markus Friedl. |
| 15 | * 4. The name of the author may not be used to endorse or promote products |
| 16 | * derived from this software without specific prior written permission. |
| 17 | * |
| 18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 28 | */ |
| 29 | |
| 30 | /** |
| 31 | ** loginrec.c: platform-independent login recording and lastlog retrieval |
| 32 | **/ |
| 33 | |
| 34 | /** |
| 35 | ** TODO: |
| 36 | ** sockaddr_* stuff isn't finished |
| 37 | ** |
| 38 | ** Platform status: |
| 39 | ** ---------------- |
| 40 | ** |
| 41 | ** Known good: |
| 42 | ** Linux (Redhat 6.2, need more variants) |
| 43 | ** HP-UX 10.20 (gcc only) |
| 44 | ** |
| 45 | ** Testing required: Please send reports! |
| 46 | ** Solaris |
| 47 | ** IRIX |
| 48 | ** NetBSD |
| 49 | ** HP-UX 11 |
andre | 60f3c98 | 2000-06-03 16:18:19 +0000 | [diff] [blame^] | 50 | ** AIX |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 51 | ** |
| 52 | ** Platforms with known problems: |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 53 | ** NeXT |
| 54 | ** |
| 55 | **/ |
| 56 | |
| 57 | #include "includes.h" |
| 58 | |
| 59 | #include <sys/types.h> |
| 60 | #include <sys/stat.h> |
| 61 | #include <netinet/in.h> |
| 62 | #include <unistd.h> |
| 63 | #include <fcntl.h> |
| 64 | #include <stdlib.h> |
| 65 | #include <string.h> |
| 66 | #include <stdio.h> |
| 67 | #include <errno.h> |
| 68 | #ifdef HAVE_PWD_H |
| 69 | # include <pwd.h> |
| 70 | #endif |
| 71 | #ifdef HAVE_SYS_TIME_H |
| 72 | # include <sys/time.h> |
| 73 | #else |
| 74 | # include <time.h> |
| 75 | #endif |
| 76 | |
| 77 | #include "ssh.h" |
| 78 | #include "xmalloc.h" |
| 79 | #include "loginrec.h" |
| 80 | |
andre | 60f3c98 | 2000-06-03 16:18:19 +0000 | [diff] [blame^] | 81 | RCSID("$Id: loginrec.c,v 1.2 2000/06/03 16:18:19 andre Exp $"); |
andre | 2ff7b5d | 2000-06-03 14:57:40 +0000 | [diff] [blame] | 82 | |
| 83 | |
| 84 | /** |
| 85 | ** prototypes for helper functions in this file |
| 86 | **/ |
| 87 | |
| 88 | #if HAVE_UTMP_H |
| 89 | # include <utmp.h> |
| 90 | void set_utmp_time(struct logininfo *li, struct utmp *ut); |
| 91 | void construct_utmp(struct logininfo *li, struct utmp *ut); |
| 92 | #endif |
| 93 | |
| 94 | #ifdef HAVE_UTMPX_H |
| 95 | # include <utmpx.h> |
| 96 | void set_utmpx_time(struct logininfo *li, struct utmpx *ut); |
| 97 | void construct_utmpx(struct logininfo *li, struct utmpx *ut); |
| 98 | #endif |
| 99 | |
| 100 | int utmp_write_entry(struct logininfo *li); |
| 101 | int utmpx_write_entry(struct logininfo *li); |
| 102 | int wtmp_write_entry(struct logininfo *li); |
| 103 | int wtmpx_write_entry(struct logininfo *li); |
| 104 | int lastlog_write_entry(struct logininfo *li); |
| 105 | int syslogin_write_entry(struct logininfo *li); |
| 106 | |
| 107 | int getlast_entry(struct logininfo *li); |
| 108 | int lastlog_get_entry(struct logininfo *li); |
| 109 | int wtmp_get_entry(struct logininfo *li); |
| 110 | int wtmpx_get_entry(struct logininfo *li); |
| 111 | |
| 112 | |
| 113 | /** |
| 114 | ** platform-independent login functions |
| 115 | **/ |
| 116 | |
| 117 | /* login_alloc_entry() - allocate and initialise a logininfo */ |
| 118 | struct logininfo *login_alloc_entry(int pid, const char *username, |
| 119 | const char *hostname, |
| 120 | const char *line) { |
| 121 | struct logininfo *newli; |
| 122 | |
| 123 | newli = (struct logininfo *) xmalloc (sizeof(struct logininfo)); |
| 124 | |
| 125 | if (login_init_entry(newli, pid, username, hostname, line)) |
| 126 | return newli; |
| 127 | else |
| 128 | return 0; /* fail */ |
| 129 | } /* login_alloc_entry() */ |
| 130 | |
| 131 | |
| 132 | /* login_free_entry() - free struct memory (duh) */ |
| 133 | void login_free_entry(struct logininfo *li) { |
| 134 | if (li && (li->line[0] != '\0')) |
| 135 | free ((void *)li); |
| 136 | else |
| 137 | log("login_free_entry: attempt to free invalid entry (warning)"); |
| 138 | } /* login_free_entry() */ |
| 139 | |
| 140 | /* login_init_entry() - initialise a struct logininfo */ |
| 141 | int login_init_entry(struct logininfo *li, |
| 142 | int pid, const char *username, |
| 143 | const char *hostname, const char *line) { |
| 144 | |
| 145 | /* zero the structure */ |
| 146 | memset(li, 0, sizeof(struct logininfo)); |
| 147 | |
| 148 | /* progname should be set outside this call */ |
| 149 | /* type stays null by default */ |
| 150 | login_set_pid(li, pid); |
| 151 | /* set the line information */ |
| 152 | login_set_line(li, line); |
| 153 | login_set_username(li, username); |
| 154 | login_set_hostname(li, hostname); |
| 155 | /* exit status and termination stay null by default */ |
| 156 | login_set_current_time(li); |
| 157 | /* sockaddr_* stuff must be set separately (for now) */ |
| 158 | return 1; |
| 159 | } /* login_init_entry() */ |
| 160 | |
| 161 | |
| 162 | void |
| 163 | login_set_progname(struct logininfo *li, const char *progname) { |
| 164 | memset(li->progname, '\0', sizeof(li->progname)); |
| 165 | if (progname) |
| 166 | strlcpy(li->progname, progname, sizeof(li->progname)); |
| 167 | else |
| 168 | li->progname[0] = '\0'; /* set to null */ |
| 169 | } |
| 170 | |
| 171 | void |
| 172 | login_set_type(struct logininfo *li, int type) { |
| 173 | li->type = type; |
| 174 | } |
| 175 | |
| 176 | void |
| 177 | login_set_pid(struct logininfo *li, int pid) { |
| 178 | if (!pid) |
| 179 | li->pid = (int)getpid(); |
| 180 | else |
| 181 | li->pid = pid; |
| 182 | } |
| 183 | |
| 184 | void |
| 185 | login_set_uid(struct logininfo *li, int uid) { |
| 186 | struct passwd *pw; |
| 187 | |
| 188 | li->uid = uid; |
| 189 | /* now update the username */ |
| 190 | pw = getpwuid(uid); |
| 191 | strlcpy(li->username, pw->pw_name, sizeof(li->username)); |
| 192 | } |
| 193 | |
| 194 | void |
| 195 | login_set_line(struct logininfo *li, const char *line) { |
| 196 | if (line) { |
| 197 | /* canonical form is the full name, i.e. including '/dev' */ |
| 198 | line_fullname(li->line, line, sizeof(li->line)); |
| 199 | } else |
| 200 | li->line[0] = '\0'; |
| 201 | } |
| 202 | |
| 203 | void |
| 204 | login_set_username(struct logininfo *li, const char *username) { |
| 205 | struct passwd *pw; |
| 206 | |
| 207 | if (!username) { |
| 208 | li->username[0] = '\0'; |
| 209 | li->uid = -1; /* hmm... */ |
| 210 | } else { |
| 211 | strlcpy(li->username, username, sizeof(li->username)); |
| 212 | /* now update the uid */ |
| 213 | pw = getpwnam(username); |
| 214 | li->uid = pw->pw_uid; |
| 215 | } |
| 216 | } |
| 217 | |
| 218 | |
| 219 | void |
| 220 | login_set_hostname(struct logininfo *li, const char *hostname) { |
| 221 | if (hostname) { /* can be null */ |
| 222 | strlcpy(li->hostname, hostname, sizeof(li->hostname)); |
| 223 | } |
| 224 | } |
| 225 | |
| 226 | |
| 227 | void |
| 228 | login_set_exitstatus(struct logininfo *li, |
| 229 | int exit, int termination) { |
| 230 | /* FIXME: (ATL) And? */ |
| 231 | } |
| 232 | |
| 233 | |
| 234 | /* tv_usec should be null on systems without struct timeval */ |
| 235 | void |
| 236 | login_set_time(struct logininfo *li, |
| 237 | unsigned int tv_sec, unsigned int tv_usec) { |
| 238 | li->tv_sec = tv_sec; |
| 239 | li->tv_usec = tv_usec; |
| 240 | } |
| 241 | |
| 242 | |
| 243 | void |
| 244 | login_set_current_time(struct logininfo *li) { |
| 245 | #ifdef HAVE_SYS_TIME_H |
| 246 | struct timeval tv; |
| 247 | |
| 248 | gettimeofday(&tv, NULL); |
| 249 | li->tv_sec = tv.tv_sec ; li->tv_usec = tv.tv_usec; |
| 250 | #else |
| 251 | time_t t = time(0); |
| 252 | |
| 253 | li->tv_sec = t; li->tv_usec = 0; |
| 254 | #endif |
| 255 | } |
| 256 | |
| 257 | void |
| 258 | login_set_ip4(struct logininfo *li, |
| 259 | const struct sockaddr_in *sa_in4) { |
| 260 | memcpy((void *)&(li->hostaddr.sa_in4), (const void *)sa_in4, |
| 261 | sizeof(struct sockaddr_in)); |
| 262 | } |
| 263 | |
| 264 | #ifdef HAVE_IP6 |
| 265 | void |
| 266 | login_set_ip6(struct logininfo *li, |
| 267 | const struct sockaddr_in6 *sa_in6) { |
| 268 | memcpy((void *)&(li->hostaddr.sa_in4), (const void *)sa_in6, |
| 269 | sizeof(struct sockaddr_in6)); |
| 270 | } |
| 271 | #endif |
| 272 | |
| 273 | /* |
| 274 | * record the entry |
| 275 | */ |
| 276 | |
| 277 | int |
| 278 | login_write (struct logininfo *li) { |
| 279 | |
| 280 | if ((int)geteuid() != 0) { |
| 281 | log("Attempt to write login records by non-root user (aborting)"); |
| 282 | return 1; |
| 283 | } |
| 284 | /* set the timestamp */ |
| 285 | login_set_current_time(li); |
| 286 | #ifdef USE_LOGIN |
| 287 | syslogin_write_entry(li); |
| 288 | #endif |
| 289 | #ifdef USE_LASTLOG |
| 290 | if (li->type == LTYPE_LOGIN) { |
| 291 | lastlog_write_entry(li); |
| 292 | } |
| 293 | #endif |
| 294 | #ifdef USE_UTMP |
| 295 | utmp_write_entry(li); |
| 296 | #endif |
| 297 | #ifdef USE_WTMP |
| 298 | wtmp_write_entry(li); |
| 299 | #endif |
| 300 | #ifdef USE_UTMPX |
| 301 | utmpx_write_entry(li); |
| 302 | #endif |
| 303 | #ifdef USE_WTMPX |
| 304 | wtmpx_write_entry(li); |
| 305 | #endif |
| 306 | return 0; |
| 307 | } |
| 308 | |
| 309 | int |
| 310 | login_login (struct logininfo *li) { |
| 311 | li->type = LTYPE_LOGIN; |
| 312 | return login_write(li); |
| 313 | } |
| 314 | |
| 315 | int |
| 316 | login_logout(struct logininfo *li) { |
| 317 | li->type = LTYPE_LOGOUT; |
| 318 | return login_write(li); |
| 319 | } |
| 320 | |
| 321 | int |
| 322 | login_log_entry(struct logininfo *li) { |
| 323 | return login_write(li); |
| 324 | } |
| 325 | |
| 326 | |
| 327 | unsigned int |
| 328 | login_getlasttime_name(const char *username) { |
| 329 | struct logininfo li; |
| 330 | |
| 331 | memset(&li, '\0', sizeof(li)); |
| 332 | login_set_username(&li, username); |
| 333 | if (getlast_entry(&li)) |
| 334 | return li.tv_sec; |
| 335 | else |
| 336 | return 0; |
| 337 | } /* login_getlasttime_name() */ |
| 338 | |
| 339 | |
| 340 | unsigned int |
| 341 | login_getlasttime_uid(const int uid) { |
| 342 | struct logininfo li; |
| 343 | |
| 344 | memset(&li, '\0', sizeof(li)); |
| 345 | login_set_uid(&li, uid); |
| 346 | if (getlast_entry(&li)) |
| 347 | return li.tv_sec; |
| 348 | else |
| 349 | return 0; |
| 350 | } /* login_getlasttime_uid() */ |
| 351 | |
| 352 | |
| 353 | struct logininfo * |
| 354 | login_getlastentry_name(struct logininfo *li, |
| 355 | const char *username) { |
| 356 | login_set_username(li, username); |
| 357 | if (getlast_entry(li)) |
| 358 | return li; |
| 359 | else |
| 360 | return 0; |
| 361 | } /* login_getlastentry_name() */ |
| 362 | |
| 363 | struct logininfo * |
| 364 | login_getlastentry_uid(struct logininfo *li, |
| 365 | const int uid) { |
| 366 | login_set_uid(li, uid); |
| 367 | if (getlast_entry(li)) |
| 368 | return li; |
| 369 | else |
| 370 | return 0; |
| 371 | } /* login_getlastentry_uid() */ |
| 372 | |
| 373 | |
| 374 | /** |
| 375 | ** 'line' string utility functions |
| 376 | **/ |
| 377 | |
| 378 | /* |
| 379 | * process the 'line' string into three forms: |
| 380 | * 1. The full filename (including '/dev') |
| 381 | * 2. The stripped name (excluding '/dev') |
| 382 | * 3. The abbreviated name (e.g. /dev/ttyp00 |
| 383 | * |
| 384 | * Form 3 is used on some systems to identify a .tmp.? entry when |
| 385 | * attempting to remove it. Typically both addition and removal is |
| 386 | * performed by one application - say, sshd - so as long as the |
| 387 | * choice uniquely identifies a terminal and is the same at login and |
| 388 | * logout time, we're in good shape. |
| 389 | * |
| 390 | * NOTE: None of these calls actually allocate any memory - |
| 391 | * since their target is probably a structure, they don't |
| 392 | * need to. |
| 393 | */ |
| 394 | |
| 395 | |
| 396 | /* add the leading '/dev/' if it doesn't exist |
| 397 | * make sure dst has enough space, if not just copy src (ugh) */ |
| 398 | char * |
| 399 | line_fullname(char *dst, const char *src, int dstsize) { |
| 400 | memset(dst, '\0', dstsize); |
| 401 | if ((strncmp(src, "/dev/", 5) == 0) || (dstsize < (strlen(src) + 5))) |
| 402 | strlcpy(dst, src, dstsize); |
| 403 | else { |
| 404 | strlcpy(dst, "/dev/", 5); |
| 405 | strlcat(dst, src, dstsize); |
| 406 | } |
| 407 | return dst; |
| 408 | } |
| 409 | |
| 410 | /* strip the leading '/dev' if it exists, return dst */ |
| 411 | char * |
| 412 | line_stripname(char *dst, const char *src, int dstsize) { |
| 413 | memset(dst, '\0', dstsize); |
| 414 | if (strncmp(src, "/dev/", 5) == 0) |
| 415 | strlcpy(dst, &src[5], dstsize); |
| 416 | else |
| 417 | strlcpy(dst, src, dstsize); |
| 418 | return dst; |
| 419 | } /* stripdev() */ |
| 420 | |
| 421 | /* return the abbreviated (usually four-character) form * |
| 422 | * simple algorithm for making name: |
| 423 | * - first character is 'L' (arbitrary - 'lib(L)ogin' :-) ) |
| 424 | * - remaining n characters are last n characters of line |
| 425 | * This is good for up to 999 ptys, I hope that's enough... |
| 426 | */ |
| 427 | char * |
| 428 | line_abbrevname(char *dst, const char *src, int dstsize) { |
| 429 | memset(dst, '\0', dstsize); |
| 430 | dst[0]='L'; |
| 431 | strlcpy(dst+1, &src[strlen(src)-(dstsize)], dstsize); |
| 432 | return dst; |
| 433 | } |
| 434 | |
| 435 | |
| 436 | /** |
| 437 | ** utmp utility functions |
| 438 | **/ |
| 439 | |
| 440 | #if defined(USE_UTMP) || defined (USE_WTMP) || defined (USE_LOGIN) |
| 441 | |
| 442 | #ifdef HAVE_UTMP_H |
| 443 | # include <utmp.h> |
| 444 | #endif |
| 445 | #ifdef USE_TIMEVAL |
| 446 | # include <sys/time.h> |
| 447 | #else |
| 448 | # include <time.h> |
| 449 | #endif |
| 450 | |
| 451 | /* build the utmp structure */ |
| 452 | void |
| 453 | set_utmp_time(struct logininfo *li, struct utmp *ut) { |
| 454 | #ifdef HAVE_TV_IN_UTMP |
| 455 | ut->ut_tv.tv_sec = li->tv_sec; |
| 456 | ut->ut_tv.tv_usec = li->tv_usec; |
| 457 | #else |
| 458 | # ifdef HAVE_TIME_IN_UTMP |
| 459 | ut->ut_time = li->tv_sec; |
| 460 | # endif |
| 461 | #endif |
| 462 | } |
| 463 | |
| 464 | void |
| 465 | construct_utmp(struct logininfo *li, |
| 466 | struct utmp *ut) { |
| 467 | memset(ut, '\0', sizeof(struct utmp)); |
| 468 | |
| 469 | #ifdef HAVE_ID_IN_UTMP |
| 470 | line_abbrevname(ut->ut_id, li->line, sizeof(ut->ut_id)); |
| 471 | #endif |
| 472 | |
| 473 | #ifdef HAVE_TYPE_IN_UTMP |
| 474 | /* this is done here to keep utmp constants out of login.h */ |
| 475 | switch (li->type) { |
| 476 | case LTYPE_LOGIN: |
| 477 | ut->ut_type = USER_PROCESS; |
| 478 | break; |
| 479 | case LTYPE_LOGOUT: |
| 480 | ut->ut_type = DEAD_PROCESS; |
| 481 | break; |
| 482 | } |
| 483 | #endif |
| 484 | |
| 485 | #ifdef HAVE_PID_IN_UTMP |
| 486 | ut->ut_pid = li->pid; |
| 487 | #endif |
| 488 | line_stripname(ut->ut_line, li->line, sizeof(ut->ut_line)); |
| 489 | strlcpy(ut->ut_name, li->username, sizeof(ut->ut_name)); |
| 490 | set_utmp_time(li, ut); |
| 491 | #ifdef HAVE_HOST_IN_UTMP |
| 492 | strlcpy(ut->ut_host, li->hostname, sizeof(ut->ut_host)); |
| 493 | #endif |
| 494 | #ifdef HAVE_ADDR_IN_UTMP |
| 495 | /* !!! not supported yet (can't see its big use either) */ |
| 496 | #endif |
| 497 | |
| 498 | } /* construct_utmp() */ |
| 499 | |
| 500 | #endif |
| 501 | /* USE_UTMP || USE_WTMP || USE_LOGIN */ |
| 502 | |
| 503 | /** |
| 504 | ** utmpx utility functions |
| 505 | **/ |
| 506 | |
| 507 | #if defined(USE_UTMPX) || defined (USE_WTMPX) |
| 508 | |
| 509 | #ifdef HAVE_UTMPX_H |
| 510 | # include <utmpx.h> |
| 511 | #endif |
| 512 | #ifdef USE_TIMEVAL |
| 513 | # include <sys/time.h> |
| 514 | #else |
| 515 | # include <time.h> |
| 516 | #endif |
| 517 | |
| 518 | /* build the utmpx structure */ |
| 519 | void |
| 520 | set_utmpx_time(struct logininfo *li, struct utmpx *utx) { |
| 521 | #ifdef HAVE_TV_IN_UTMPX |
| 522 | utx->ut_tv.tv_sec = li->tv_sec; |
| 523 | utx->ut_tv.tv_usec = li->tv_usec; |
| 524 | #else |
| 525 | # ifdef HAVE_TIME_IN_UTMPX |
| 526 | utx->ut_time = li->tv_sec; |
| 527 | # endif |
| 528 | #endif |
| 529 | } |
| 530 | |
| 531 | void |
| 532 | construct_utmpx(struct logininfo *li, |
| 533 | struct utmpx *utx) { |
| 534 | memset(utx, '\0', sizeof(struct utmpx)); |
| 535 | |
| 536 | line_abbrevname(utx->ut_id, li->line, sizeof(utx->ut_id)); |
| 537 | |
| 538 | /* this is done here to keep utmp constants out of loginrec.h */ |
| 539 | switch (li->type) { |
| 540 | case LTYPE_LOGIN: |
| 541 | utx->ut_type = USER_PROCESS; |
| 542 | break; |
| 543 | case LTYPE_LOGOUT: |
| 544 | utx->ut_type = DEAD_PROCESS; |
| 545 | break; |
| 546 | } |
| 547 | |
| 548 | utx->ut_pid = li->pid; |
| 549 | line_stripname(utx->ut_line, li->line, sizeof(utx->ut_line)); |
| 550 | strlcpy(utx->ut_name, li->username, sizeof(utx->ut_name)); |
| 551 | set_utmpx_time(li, utx); |
| 552 | #ifdef HAVE_HOST_IN_UTMPX |
| 553 | strlcpy(utx->ut_host, li->hostname, sizeof(utx->ut_host)); |
| 554 | #endif |
| 555 | #ifdef HAVE_ADDR_IN_UTMPX |
| 556 | /* !!! not supported yet (some issues with types of addresses) */ |
| 557 | #endif |
| 558 | #ifdef HAVE_SYSLEN_IN_UTMPX |
| 559 | /* this is safe because of the extra nulls in logininfo */ |
| 560 | utx->ut_syslen = strlen(li->hostname); |
| 561 | #endif |
| 562 | } /* construct_utmpx() */ |
| 563 | |
| 564 | #endif |
| 565 | /* USE_UTMPX || USE_WTMPX */ |
| 566 | |
| 567 | |
| 568 | |
| 569 | /** |
| 570 | ** utmp functions |
| 571 | **/ |
| 572 | |
| 573 | /* FIXME: (ATL) utmp_write_direct needs testing */ |
| 574 | |
| 575 | #ifdef USE_UTMP |
| 576 | |
| 577 | #include <utmp.h> |
| 578 | |
| 579 | /* if we can, use pututline() etc. */ |
| 580 | #if !defined(DISABLE_PUTUTLINE) && defined(HAVE_SETUTENT) && \ |
| 581 | defined(HAVE_PUTUTLINE) |
| 582 | # define UTMP_USE_LIBRARY |
| 583 | #endif |
| 584 | |
| 585 | |
| 586 | /* write a utmp entry with the system's help (pututline() and pals) */ |
| 587 | #ifdef UTMP_USE_LIBRARY |
| 588 | static int |
| 589 | utmp_write_library(struct logininfo *li, struct utmp *ut) { |
| 590 | |
| 591 | setutent(); |
| 592 | pututline(ut); |
| 593 | |
| 594 | #ifdef HAVE_ENDUTENT |
| 595 | endutent(); |
| 596 | #endif |
| 597 | return 1; |
| 598 | } /* utmp_write_library() */ |
| 599 | |
| 600 | #else |
| 601 | |
| 602 | /* write a utmp entry direct to the file */ |
| 603 | /* This code is a slightly modification of code in OpenBSD's login.c |
| 604 | * (in libutil) and so is subject to the OpenBSD Licensing terms. */ |
| 605 | static int |
| 606 | utmp_write_direct(struct logininfo *li, struct utmp *ut) { |
| 607 | struct utmp old_ut; |
| 608 | register int fd; |
| 609 | int tty; |
| 610 | |
| 611 | tty = ttyslot(); /* seems only to work for /dev/ttyp? style names */ |
| 612 | |
| 613 | if (tty > 0 && (fd = open(UTMP_FILE, O_RDWR|O_CREAT, 0644)) >= 0) { |
| 614 | (void)lseek(fd, (off_t)(tty * sizeof(struct utmp)), SEEK_SET); |
| 615 | /* |
| 616 | * Prevent luser from zero'ing out ut_host. |
| 617 | * If the new ut_line is empty but the old one is not |
| 618 | * and ut_line and ut_name match, preserve the old ut_line. |
| 619 | */ |
| 620 | if ( read(fd, &old_ut, sizeof(struct utmp)) == sizeof(struct utmp) |
| 621 | && ut->ut_host[0] == '\0' |
| 622 | && old_ut.ut_host[0] != '\0' |
| 623 | && strncmp(old_ut.ut_line, ut->ut_line, sizeof(ut->ut_line)) == 0 |
| 624 | && strncmp(old_ut.ut_name, ut->ut_name, sizeof(ut->ut_name)) == 0 ) |
| 625 | (void)memcpy(ut->ut_host, old_ut.ut_host, sizeof(ut->ut_host)); |
| 626 | |
| 627 | (void)lseek(fd, (off_t)(tty * sizeof(struct utmp)), SEEK_SET); |
| 628 | if (write(fd, ut, sizeof(struct utmp))==-1) |
| 629 | log("utmp_write_direct: error writing %s: %s", |
| 630 | UTMP_FILE, strerror(errno)); |
| 631 | |
| 632 | (void)close(fd); |
| 633 | return 1; |
| 634 | } else |
| 635 | return 0; |
| 636 | } /* utmp_write_direct() */ |
| 637 | |
| 638 | #endif /* UTMP_USE_LIBRARY */ |
| 639 | |
| 640 | |
| 641 | static int |
| 642 | utmp_perform_login(struct logininfo *li) { |
| 643 | struct utmp ut; |
| 644 | |
| 645 | construct_utmp(li, &ut); |
| 646 | |
| 647 | #ifdef UTMP_USE_LIBRARY |
| 648 | if (!utmp_write_library(li, &ut)) { |
| 649 | log("utmp_perform_login: utmp_write_library() failed"); |
| 650 | return 0; |
| 651 | } |
| 652 | #else |
| 653 | if (!utmp_write_direct(li, &ut)) { |
| 654 | log("utmp_perform_login: utmp_write_direct() failed"); |
| 655 | return 0; |
| 656 | } |
| 657 | #endif |
| 658 | return 1; |
| 659 | } /* utmp_perform_login() */ |
| 660 | |
| 661 | |
| 662 | static int |
| 663 | utmp_perform_logout(struct logininfo *li) { |
| 664 | struct utmp ut; |
| 665 | |
| 666 | memset(&ut, '\0', sizeof(ut)); |
| 667 | set_utmp_time(li, &ut); |
| 668 | line_stripname(ut.ut_line, li->line, sizeof(ut.ut_line)); |
| 669 | #ifdef HAVE_ID_IN_UTMP |
| 670 | line_abbrevname(ut.ut_id, li->line, sizeof(ut.ut_id)); |
| 671 | #endif |
| 672 | #ifdef HAVE_TYPE_IN_UTMP |
| 673 | ut.ut_type = DEAD_PROCESS; |
| 674 | #endif |
| 675 | |
| 676 | #if !defined(DISABLE_PUTUTLINE) \ |
| 677 | && defined(HAVE_SETUTENT) && defined(HAVE_PUTUTLINE) |
| 678 | utmp_write_library(li, &ut); |
| 679 | #else |
| 680 | utmp_write_direct(li, &ut); |
| 681 | #endif |
| 682 | |
| 683 | return 1; |
| 684 | } /* utmp_perform_logout() */ |
| 685 | |
| 686 | |
| 687 | int |
| 688 | utmp_write_entry(struct logininfo *li) { |
| 689 | |
| 690 | switch(li->type) { |
| 691 | case LTYPE_LOGIN: |
| 692 | return utmp_perform_login(li); |
| 693 | |
| 694 | case LTYPE_LOGOUT: |
| 695 | return utmp_perform_logout(li); |
| 696 | |
| 697 | default: |
| 698 | log("utmp_write_entry: invalid type field"); |
| 699 | return 0; |
| 700 | } |
| 701 | } /* utmp_write_entry() */ |
| 702 | |
| 703 | |
| 704 | #endif |
| 705 | /* USE_UTMP */ |
| 706 | |
| 707 | |
| 708 | /** |
| 709 | ** utmpx functions |
| 710 | **/ |
| 711 | |
| 712 | /* not much point if we don't want utmpx entries */ |
| 713 | #ifdef USE_UTMPX |
| 714 | |
| 715 | #include <utmpx.h> |
| 716 | |
| 717 | /* if we have the wherewithall, use pututxline etc. */ |
| 718 | #if !defined(DISABLE_PUTUTXLINE) && defined(HAVE_SETUTXENT) \ |
| 719 | && defined(HAVE_PUTUTXLINE) |
| 720 | # define UTMPX_USE_LIBRARY |
| 721 | #endif |
| 722 | |
| 723 | |
| 724 | /* write a utmpx entry with the system's help (pututxline() and pals) */ |
| 725 | #ifdef UTMPX_USE_LIBRARY |
| 726 | static int |
| 727 | utmpx_write_library(struct logininfo *li, struct utmpx *utx) { |
| 728 | |
| 729 | setutxent(); |
| 730 | pututxline(utx); |
| 731 | |
| 732 | #ifdef HAVE_ENDUTXENT |
| 733 | endutxent(); |
| 734 | #endif |
| 735 | return 1; |
| 736 | } /* utmpx_write_library() */ |
| 737 | |
| 738 | #else |
| 739 | /* UTMPX_USE_LIBRARY */ |
| 740 | |
| 741 | |
| 742 | /* write a utmp entry direct to the file */ |
| 743 | static int |
| 744 | utmpx_write_direct(struct logininfo *li, struct utmpx *utx) { |
| 745 | |
| 746 | log("utmpx_write_direct: not implemented!"); |
| 747 | return 0; |
| 748 | } /* utmpx_write_direct() */ |
| 749 | |
| 750 | #endif |
| 751 | /* UTMPX_USE_LIBRARY */ |
| 752 | |
| 753 | static int |
| 754 | utmpx_perform_login(struct logininfo *li) { |
| 755 | struct utmpx utx; |
| 756 | |
| 757 | construct_utmpx(li, &utx); |
| 758 | |
| 759 | #ifdef UTMPX_USE_LIBRARY |
| 760 | if (!utmpx_write_library(li, &utx)) { |
| 761 | log("utmpx_perform_login: utmp_write_library() failed"); |
| 762 | return 0; |
| 763 | } |
| 764 | #else |
| 765 | if (!utmpx_write_direct(li, &ut)) { |
| 766 | log("utmpx_perform_login: utmp_write_direct() failed"); |
| 767 | return 0; |
| 768 | } |
| 769 | #endif |
| 770 | return 1; |
| 771 | } /* utmpx_perform_login() */ |
| 772 | |
| 773 | |
| 774 | static int |
| 775 | utmpx_perform_logout(struct logininfo *li) { |
| 776 | struct utmpx utx; |
| 777 | |
| 778 | memset(&utx, '\0', sizeof(utx)); |
| 779 | set_utmpx_time(li, &utx); |
| 780 | line_stripname(utx.ut_line, li->line, sizeof(utx.ut_line)); |
| 781 | #ifdef HAVE_ID_IN_UTMPX |
| 782 | line_abbrevname(utx.ut_id, li->line, sizeof(utx.ut_id)); |
| 783 | #endif |
| 784 | #ifdef HAVE_TYPE_IN_UTMPX |
| 785 | utx.ut_type = DEAD_PROCESS; |
| 786 | #endif |
| 787 | |
| 788 | #ifdef UTMPX_USE_LIBRARY |
| 789 | utmpx_write_library(li, &utx); |
| 790 | #else |
| 791 | utmpx_write_direct(li, &utx); |
| 792 | #endif |
| 793 | |
| 794 | return 1; |
| 795 | } /* utmpx_perform_logout() */ |
| 796 | |
| 797 | |
| 798 | int |
| 799 | utmpx_write_entry(struct logininfo *li) { |
| 800 | |
| 801 | switch(li->type) { |
| 802 | case LTYPE_LOGIN: |
| 803 | return utmpx_perform_login(li); |
| 804 | case LTYPE_LOGOUT: |
| 805 | return utmpx_perform_logout(li); |
| 806 | default: |
| 807 | log("utmpx_write_entry: invalid type field"); |
| 808 | return 0; |
| 809 | } |
| 810 | } /* utmpx_write_entry() */ |
| 811 | |
| 812 | |
| 813 | #endif |
| 814 | /* USE_UTMPX */ |
| 815 | |
| 816 | |
| 817 | /** |
| 818 | ** wtmp functions |
| 819 | **/ |
| 820 | |
| 821 | #ifdef USE_WTMP |
| 822 | |
| 823 | # include <utmp.h> |
| 824 | |
| 825 | /* write a wtmp entry direct to the end of the file */ |
| 826 | /* This code is a slight modification of code in OpenBSD's logwtmp.c |
| 827 | * (in libutil) and so is subject to the OpenBSD licensing terms */ |
| 828 | static int |
| 829 | wtmp_write(struct logininfo *li, struct utmp *ut) { |
| 830 | struct stat buf; |
| 831 | int fd, ret = 1; |
| 832 | |
| 833 | if ((fd = open(WTMP_FILE, O_WRONLY|O_APPEND, 0)) < 0) { |
| 834 | log("wtmp_write: problem writing %s: %s", |
| 835 | WTMP_FILE, strerror(errno)); |
| 836 | return 0; |
| 837 | } |
| 838 | |
| 839 | if (fstat(fd, &buf) == 0) |
| 840 | if (write(fd, (char *)ut, sizeof(struct utmp)) != |
| 841 | sizeof(struct utmp)) { |
| 842 | ftruncate(fd, buf.st_size); |
| 843 | log("wtmp_write: problem writing %s: %s", |
| 844 | WTMP_FILE, strerror(errno)); |
| 845 | ret = 0; |
| 846 | } |
| 847 | (void)close(fd); |
| 848 | |
| 849 | return ret; |
| 850 | } /* wtmp_write() */ |
| 851 | |
| 852 | |
| 853 | |
| 854 | static int |
| 855 | wtmp_perform_login(struct logininfo *li) { |
| 856 | struct utmp ut; |
| 857 | |
| 858 | construct_utmp(li, &ut); |
| 859 | return wtmp_write(li, &ut); |
| 860 | } /* wtmp_perform_login() */ |
| 861 | |
| 862 | |
| 863 | static int |
| 864 | wtmp_perform_logout(struct logininfo *li) { |
| 865 | struct utmp ut; |
| 866 | |
| 867 | construct_utmp(li, &ut); |
| 868 | /* blank out unnecessary fields */ |
| 869 | memset(&(ut.ut_name), '\0', sizeof(ut.ut_name)); |
| 870 | #ifdef HAVE_ID_IN_UTMP |
| 871 | memset(&(ut.ut_id), '\0', sizeof(ut.ut_id)); |
| 872 | #endif |
| 873 | #ifdef HAVE_HOST_IN_UTMP |
| 874 | memset(&(ut.ut_host), '\0', sizeof(ut.ut_host)); |
| 875 | #endif |
| 876 | #ifdef HAVE_ADDR_IN_UTMP |
| 877 | memset(&(ut.ut_addr), '\0', sizeof(ut.ut_addr)); |
| 878 | #endif |
| 879 | return wtmp_write(li, &ut); |
| 880 | } /* wtmp_perform_logout() */ |
| 881 | |
| 882 | |
| 883 | int |
| 884 | wtmp_write_entry(struct logininfo *li) { |
| 885 | |
| 886 | switch(li->type) { |
| 887 | case LTYPE_LOGIN: |
| 888 | return wtmp_perform_login(li); |
| 889 | case LTYPE_LOGOUT: |
| 890 | return wtmp_perform_logout(li); |
| 891 | default: |
| 892 | log("wtmp_write_entry: invalid type field"); |
| 893 | return 0; |
| 894 | } |
| 895 | } /* wtmp_write_entry() */ |
| 896 | |
| 897 | |
| 898 | |
| 899 | int |
| 900 | wtmp_get_entry(struct logininfo *li) { |
| 901 | struct stat st; |
| 902 | struct utmp ut; |
| 903 | int fd; |
| 904 | |
| 905 | if ((fd = open(WTMP_FILE, O_RDONLY)) < 0) { |
| 906 | log("wtmp_get_entry: problem opening %s: %s", |
| 907 | WTMP_FILE, strerror(errno)); |
| 908 | return 0; |
| 909 | } |
| 910 | |
| 911 | if (fstat(fd, &st) != 0) { |
| 912 | log("wtmp_get_entry: couldn't stat %s: %s", |
| 913 | WTMP_FILE, strerror(errno)); |
| 914 | close(fd); |
| 915 | return 0; |
| 916 | } |
| 917 | |
| 918 | (void)lseek(fd, (off_t)(0-sizeof(struct utmp)), SEEK_END); |
| 919 | |
| 920 | do { |
| 921 | if (read(fd, &ut, sizeof(ut)) != sizeof(ut)) { |
| 922 | log("wtmp_get_entry: read of %s failed: %s", |
| 923 | WTMP_FILE, strerror(errno)); |
| 924 | close (fd); |
| 925 | return 0; |
| 926 | } |
| 927 | |
| 928 | /* Logouts are recorded as a blank username on a particular line. |
| 929 | * So, we just need to find the username in struct utmp */ |
| 930 | if ( strncmp(li->username, ut.ut_user, 8) == 0 ) { |
| 931 | /* note we've already made sure there's a time in struct utmp */ |
| 932 | #ifdef HAVE_TIME_IN_UTMP |
| 933 | li->tv_sec = ut.ut_time; |
| 934 | #else |
| 935 | # if HAVE_TV_IN_UTMP |
| 936 | li->tv_sec = ut.ut_tv.tv_sec; |
| 937 | # endif |
| 938 | #endif |
| 939 | line_fullname(li->line, ut.ut_line, sizeof(ut.ut_line)); |
| 940 | #ifdef HAVE_HOST_IN_UTMP |
| 941 | strlcpy(li->hostname, ut.ut_host, sizeof(ut.ut_host)); |
| 942 | #endif |
| 943 | } |
| 944 | if (lseek(fd, (off_t)(0-2*sizeof(struct utmp)), SEEK_CUR) == -1) { |
| 945 | close (fd); |
| 946 | return 0; |
| 947 | } |
| 948 | } while (li->tv_sec == 0); |
| 949 | |
| 950 | return 1; |
| 951 | } /* wtmp_get_entry() */ |
| 952 | |
| 953 | |
| 954 | #endif |
| 955 | /* USE_WTMP */ |
| 956 | |
| 957 | |
| 958 | /** |
| 959 | ** wtmpx functions |
| 960 | **/ |
| 961 | |
| 962 | #ifdef USE_WTMPX |
| 963 | |
| 964 | # include <utmpx.h> |
| 965 | |
| 966 | /* write a wtmpx entry direct to the end of the file */ |
| 967 | /* This code is a slight modification of code in OpenBSD's logwtmp.c |
| 968 | * (in libutil) and so is subject to the OpenBSD licensing terms */ |
| 969 | static int |
| 970 | wtmpx_write(struct logininfo *li, struct utmpx *utx) { |
| 971 | struct stat buf; |
| 972 | int fd, ret = 1; |
| 973 | |
| 974 | if ((fd = open(WTMPX_FILE, O_WRONLY|O_APPEND, 0)) < 0) { |
| 975 | log("wtmpx_write: problem opening %s: %s", |
| 976 | WTMPX_FILE, strerror(errno)); |
| 977 | return 0; |
| 978 | } |
| 979 | |
| 980 | if (fstat(fd, &buf) == 0) |
| 981 | if (write(fd, (char *)utx, sizeof(struct utmpx)) != |
| 982 | sizeof(struct utmpx)) { |
| 983 | ftruncate(fd, buf.st_size); |
| 984 | log("wtmpx_write: problem writing %s: %s", |
| 985 | WTMPX_FILE, strerror(errno)); |
| 986 | ret = 0; |
| 987 | } |
| 988 | (void)close(fd); |
| 989 | |
| 990 | return ret; |
| 991 | } /* wtmpx_write() */ |
| 992 | |
| 993 | |
| 994 | |
| 995 | static int |
| 996 | wtmpx_perform_login(struct logininfo *li) { |
| 997 | struct utmpx utx; |
| 998 | |
| 999 | construct_utmpx(li, &utx); |
| 1000 | return wtmpx_write(li, &utx); |
| 1001 | } /* wtmpx_perform_login() */ |
| 1002 | |
| 1003 | |
| 1004 | static int |
| 1005 | wtmpx_perform_logout(struct logininfo *li) { |
| 1006 | struct utmpx utx; |
| 1007 | |
| 1008 | construct_utmpx(li, &utx); |
| 1009 | /* blank out unnecessary fields */ |
| 1010 | memset(&(utx.ut_name), '\0', sizeof(utx.ut_name)); |
| 1011 | #ifdef HAVE_ID_IN_UTMPX |
| 1012 | memset(&(utx.ut_id), '\0', sizeof(utx.ut_id)); |
| 1013 | #endif |
| 1014 | #ifdef HAVE_HOST_IN_UTMPX |
| 1015 | memset(&(utx.ut_host), '\0', sizeof(utx.ut_host)); |
| 1016 | #endif |
| 1017 | #ifdef HAVE_ADDR_IN_UTMPX |
| 1018 | memset(&(utx.ut_addr), '\0', sizeof(utx.ut_addr)); |
| 1019 | #endif |
| 1020 | return wtmpx_write(li, &utx); |
| 1021 | |
| 1022 | } /* wtmpx_perform_logout() */ |
| 1023 | |
| 1024 | |
| 1025 | int |
| 1026 | wtmpx_write_entry(struct logininfo *li) { |
| 1027 | |
| 1028 | switch(li->type) { |
| 1029 | case LTYPE_LOGIN: |
| 1030 | return wtmpx_perform_login(li); |
| 1031 | case LTYPE_LOGOUT: |
| 1032 | return wtmpx_perform_logout(li); |
| 1033 | default: |
| 1034 | log("wtmpx_write_entry: invalid type field"); |
| 1035 | return 0; |
| 1036 | } |
| 1037 | } /* wtmpx_write_entry() */ |
| 1038 | |
| 1039 | |
| 1040 | |
| 1041 | int |
| 1042 | wtmpx_get_entry(struct logininfo *li) { |
| 1043 | struct stat st; |
| 1044 | struct utmpx utx; |
| 1045 | int fd; |
| 1046 | |
| 1047 | if ((fd = open(WTMPX_FILE, O_RDONLY)) < 0) { |
| 1048 | log("wtmpx_get_entry: problem opening %s: %s", |
| 1049 | WTMPX_FILE, strerror(errno)); |
| 1050 | return 0; |
| 1051 | } |
| 1052 | |
| 1053 | if (fstat(fd, &st) != 0) { |
| 1054 | log("wtmpx_get_entry: couldn't stat %s: %s", |
| 1055 | WTMP_FILE, strerror(errno)); |
| 1056 | close(fd); |
| 1057 | return 0; |
| 1058 | } |
| 1059 | |
| 1060 | (void)lseek(fd, (off_t)(0-sizeof(struct utmpx)), SEEK_END); |
| 1061 | |
| 1062 | do { |
| 1063 | if (read(fd, &utx, sizeof(utx)) != sizeof(utx)) { |
| 1064 | log("wtmpx_get_entry: read of %s failed: %s", |
| 1065 | WTMPX_FILE, strerror(errno)); |
| 1066 | close (fd); |
| 1067 | return 0; |
| 1068 | } |
| 1069 | |
| 1070 | /* Logouts are recorded as a blank username on a particular line. |
| 1071 | * So, we just need to find the username in struct utmpx */ |
| 1072 | if ( strncmp(li->username, utx.ut_user, 8) == 0 ) { |
| 1073 | /* note we've already made sure there's a time in struct utmp */ |
| 1074 | #ifdef HAVE_TV_IN_UTMPX |
| 1075 | li->tv_sec = utx.ut_tv.tv_sec; |
| 1076 | #else |
| 1077 | # ifdef HAVE_TIME_IN_UTMPX |
| 1078 | li->tv_sec = utx.ut_time; |
| 1079 | # endif |
| 1080 | #endif |
| 1081 | line_fullname(li->line, utx.ut_line, sizeof(utx.ut_line)); |
| 1082 | #ifdef HAVE_HOST_IN_UTMPX |
| 1083 | strlcpy(li->hostname, utx.ut_host, sizeof(utx.ut_line)); |
| 1084 | #endif |
| 1085 | } |
| 1086 | if (lseek(fd, (off_t)(0-2*sizeof(struct utmpx)), SEEK_CUR) == -1) { |
| 1087 | close (fd); |
| 1088 | return 0; |
| 1089 | } |
| 1090 | } while (li->tv_sec == 0); |
| 1091 | return 1; |
| 1092 | } /* wtmpx_get_entry() */ |
| 1093 | |
| 1094 | |
| 1095 | |
| 1096 | #endif |
| 1097 | /* USE_WTMPX */ |
| 1098 | |
| 1099 | |
| 1100 | |
| 1101 | /** |
| 1102 | ** libutil login() functions |
| 1103 | **/ |
| 1104 | |
| 1105 | #ifdef USE_LOGIN |
| 1106 | |
| 1107 | #ifdef HAVE_UTMP_H |
| 1108 | # include <utmp.h> |
| 1109 | #endif |
| 1110 | #ifdef HAVE_UTIL_H |
| 1111 | # include <util.h> |
| 1112 | #endif |
| 1113 | #ifdef USE_TIMEVAL |
| 1114 | # include <sys/time.h> |
| 1115 | #else |
| 1116 | # include <time.h> |
| 1117 | #endif |
| 1118 | |
| 1119 | static int |
| 1120 | syslogin_perform_login(struct logininfo *li) { |
| 1121 | struct utmp *ut; |
| 1122 | |
| 1123 | if (! (ut = (struct utmp *)malloc(sizeof(struct utmp)))) { |
| 1124 | log("syslogin_perform_login: couldn't malloc()"); |
| 1125 | return 0; |
| 1126 | } |
| 1127 | construct_utmp(li, ut); |
| 1128 | login(ut); |
| 1129 | |
| 1130 | return 1; |
| 1131 | } /* syslogin_perform_login() */ |
| 1132 | |
| 1133 | static int |
| 1134 | syslogin_perform_logout(struct logininfo *li) { |
| 1135 | |
| 1136 | #ifdef HAVE_LOGOUT |
| 1137 | char line[8]; |
| 1138 | |
| 1139 | (void)line_stripname(line, li->line, sizeof(line)); |
| 1140 | |
| 1141 | if (!logout(line)) { |
| 1142 | log("syslogin_perform_logout: logout() returned an error"); |
| 1143 | # ifdef HAVE_LOGWTMP |
| 1144 | } else { |
| 1145 | logwtmp(line, "", ""); |
| 1146 | } |
| 1147 | # endif |
| 1148 | /* TODO: what to do if we have login, but no logout? |
| 1149 | * what if logout but no logwtmp? All routines are in libutil |
| 1150 | * so they should all be there, but... */ |
| 1151 | #endif |
| 1152 | return 1; |
| 1153 | } /* syslogin_perform_logout() */ |
| 1154 | |
| 1155 | |
| 1156 | |
| 1157 | int |
| 1158 | syslogin_write_entry(struct logininfo *li) { |
| 1159 | |
| 1160 | switch (li->type) { |
| 1161 | case LTYPE_LOGIN: |
| 1162 | return syslogin_perform_login(li); |
| 1163 | case LTYPE_LOGOUT: |
| 1164 | return syslogin_perform_logout(li); |
| 1165 | default: |
| 1166 | log("syslogin_write_entry: Invalid type field"); |
| 1167 | return 0; |
| 1168 | } |
| 1169 | } /* utmp_write_entry() */ |
| 1170 | |
| 1171 | |
| 1172 | #endif |
| 1173 | /* USE_LOGIN */ |
| 1174 | |
| 1175 | /* end of file log-syslogin.c */ |
| 1176 | |
| 1177 | |
| 1178 | /** |
| 1179 | ** lastlog functions |
| 1180 | **/ |
| 1181 | |
| 1182 | #ifdef USE_LASTLOG |
| 1183 | |
| 1184 | #ifdef HAVE_LASTLOG_H |
| 1185 | # include <lastlog.h> |
| 1186 | #else |
| 1187 | # if !defined(USE_UTMP) && !defined(USE_WTMP) |
| 1188 | # include <utmp.h> |
| 1189 | # endif |
| 1190 | #endif |
| 1191 | |
| 1192 | |
| 1193 | static void |
| 1194 | lastlog_construct(struct logininfo *li, |
| 1195 | struct lastlog *last) { |
| 1196 | /* clear the structure */ |
| 1197 | memset(last, '\0', sizeof(struct lastlog)); |
| 1198 | |
| 1199 | (void)line_stripname(last->ll_line, li->line, |
| 1200 | sizeof(last->ll_line)); |
| 1201 | strlcpy(last->ll_host, li->hostname, sizeof(last->ll_host)); |
| 1202 | last->ll_time = li->tv_sec; |
| 1203 | } /* lastlog_construct() */ |
| 1204 | |
| 1205 | |
| 1206 | #define LL_FILE 1 |
| 1207 | #define LL_DIR 2 |
| 1208 | #define LL_OTHER 3 |
| 1209 | |
| 1210 | static int |
| 1211 | lastlog_filetype(char *filename) { |
| 1212 | struct stat st; |
| 1213 | |
| 1214 | if ( stat(LASTLOG_FILE, &st) != 0) { |
| 1215 | log("lastlog_perform_login: Couldn't stat %s: %s", |
| 1216 | LASTLOG_FILE, strerror(errno)); |
| 1217 | return 0; |
| 1218 | } |
| 1219 | |
| 1220 | if (S_ISDIR(st.st_mode)) |
| 1221 | return LL_DIR; |
| 1222 | else if (S_ISREG(st.st_mode)) |
| 1223 | return LL_FILE; |
| 1224 | else |
| 1225 | return LL_OTHER; |
| 1226 | } /* lastlog_filetype() */ |
| 1227 | |
| 1228 | |
| 1229 | /* open the file (using filemode) and seek to the login entry */ |
| 1230 | static int |
| 1231 | lastlog_openseek(struct logininfo *li, int *fd, int filemode) { |
| 1232 | |
| 1233 | off_t offset; |
| 1234 | int type; |
| 1235 | char lastlog_file[1024]; |
| 1236 | |
| 1237 | type = lastlog_filetype(LASTLOG_FILE); |
| 1238 | switch (type) { |
| 1239 | case LL_FILE: |
| 1240 | strlcpy(lastlog_file, LASTLOG_FILE, sizeof(lastlog_file)); |
| 1241 | break; |
| 1242 | case LL_DIR: |
| 1243 | snprintf(lastlog_file, sizeof(lastlog_file), "%s/%s", |
| 1244 | LASTLOG_FILE, li->username); |
| 1245 | break; |
| 1246 | default: |
| 1247 | log("lastlog_openseek: %.100s is not a file or directory!", |
| 1248 | LASTLOG_FILE); |
| 1249 | return 0; |
| 1250 | } /* switch */ |
| 1251 | |
| 1252 | *fd = open(lastlog_file, filemode); |
| 1253 | if ( *fd < 0) { |
| 1254 | log("lastlog_openseek: Couldn't open %s: %s", |
| 1255 | lastlog_file, strerror(errno)); |
| 1256 | return 0; |
| 1257 | } |
| 1258 | |
| 1259 | /* find this uid's offset in the lastlog file */ |
| 1260 | offset = (off_t) ( (long)li->uid * sizeof(struct lastlog)); |
| 1261 | |
| 1262 | if ( lseek(*fd, offset, SEEK_SET) != offset ) { |
| 1263 | log("lastlog_openseek: %s->lseek(): %s", |
| 1264 | lastlog_file, strerror(errno)); |
| 1265 | return 0; |
| 1266 | } |
| 1267 | return 1; |
| 1268 | } /* lastlog_openseek() */ |
| 1269 | |
| 1270 | static int |
| 1271 | lastlog_perform_login(struct logininfo *li) { |
| 1272 | struct lastlog last; |
| 1273 | int fd; |
| 1274 | |
| 1275 | /* create our struct lastlog */ |
| 1276 | lastlog_construct(li, &last); |
| 1277 | |
| 1278 | /* write the entry */ |
| 1279 | if (lastlog_openseek(li, &fd, O_RDWR)) { |
| 1280 | if ( write(fd, &last, sizeof(struct lastlog)) |
| 1281 | != sizeof(struct lastlog) ) { |
| 1282 | log("lastlog_write_filemode: Error writing to %s: %s", |
| 1283 | LASTLOG_FILE, strerror(errno)); |
| 1284 | return 0; |
| 1285 | } |
| 1286 | return 1; |
| 1287 | } else |
| 1288 | return 0; |
| 1289 | } /* lastlog_perform_login() */ |
| 1290 | |
| 1291 | |
| 1292 | int |
| 1293 | lastlog_write_entry(struct logininfo *li) { |
| 1294 | |
| 1295 | switch(li->type) { |
| 1296 | case LTYPE_LOGIN: |
| 1297 | return lastlog_perform_login(li); |
| 1298 | default: |
| 1299 | log("lastlog_write_entry: Invalid type field"); |
| 1300 | return 0; |
| 1301 | } |
| 1302 | } /* lastlog_write_entry() */ |
| 1303 | |
| 1304 | |
| 1305 | |
| 1306 | static void |
| 1307 | lastlog_populate_entry(struct logininfo *li, |
| 1308 | struct lastlog *last) { |
| 1309 | line_fullname(li->line, last->ll_line, sizeof(li->line)); |
| 1310 | strlcpy(li->hostname, last->ll_host, sizeof(li->hostname)); |
| 1311 | li->tv_sec = last->ll_time; |
| 1312 | } /* lastlog_populate_entry() */ |
| 1313 | |
| 1314 | |
| 1315 | |
| 1316 | int |
| 1317 | lastlog_get_entry(struct logininfo *li) { |
| 1318 | struct lastlog last; |
| 1319 | int fd; |
| 1320 | |
| 1321 | if (lastlog_openseek(li, &fd, O_RDONLY)) { |
| 1322 | if ( read(fd, &last, sizeof(struct lastlog)) |
| 1323 | != sizeof(struct lastlog) ) { |
| 1324 | log("lastlog_write_filemode: Error reading from %s: %s", |
| 1325 | LASTLOG_FILE, strerror(errno)); |
| 1326 | return 0; |
| 1327 | } else { |
| 1328 | lastlog_populate_entry(li, &last); |
| 1329 | return 1; |
| 1330 | } |
| 1331 | |
| 1332 | } else |
| 1333 | return 0; |
| 1334 | } /* lastlog_get_entry() */ |
| 1335 | |
| 1336 | |
| 1337 | #endif |
| 1338 | /* USE_LASTLOG */ |
| 1339 | |
| 1340 | |
| 1341 | /** |
| 1342 | ** lastlog retrieval functions |
| 1343 | **/ |
| 1344 | |
| 1345 | /* take the uid in li and return the last login time */ |
| 1346 | int |
| 1347 | getlast_entry(struct logininfo *li) { |
| 1348 | |
| 1349 | #ifdef USE_LASTLOG |
| 1350 | if (lastlog_get_entry(li)) |
| 1351 | return 1; |
| 1352 | else |
| 1353 | return 0; |
| 1354 | #else |
| 1355 | /* !USE_LASTLOG */ |
| 1356 | /* Try to retrieve the last login time from another source */ |
| 1357 | |
| 1358 | # if defined(USE_WTMP) && (defined(HAVE_TIME_IN_UTMP) || defined(HAVE_TV_IN_UTMP)) |
| 1359 | |
| 1360 | /* retrieve last login time from utmp */ |
| 1361 | if (wtmp_get_entry(li)) |
| 1362 | return 1; |
| 1363 | else |
| 1364 | return 0; |
| 1365 | |
| 1366 | # else |
| 1367 | # if defined(USE_WTMPX) && (defined(HAVE_TIME_IN_UTMPX) || defined(HAVE_TV_IN_UTMPX)) |
| 1368 | |
| 1369 | /* retrieve last login time from utmpx */ |
| 1370 | if (wtmpx_get_entry(li)) |
| 1371 | return 1; |
| 1372 | else |
| 1373 | return 0; |
| 1374 | |
| 1375 | # else |
| 1376 | |
| 1377 | /* no means of retrieving last login time */ |
| 1378 | return 0; |
| 1379 | # endif |
| 1380 | # endif |
| 1381 | |
| 1382 | #endif |
| 1383 | /* USE_LASTLOG */ |
| 1384 | |
| 1385 | } |