1 /*- 2 * Copyright (c) 1992 Keith Muller. 3 * Copyright (c) 1992, 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * Keith Muller of the University of California, San Diego. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef lint 35 #if 0 36 static char sccsid[] = "@(#)sel_subs.c 8.1 (Berkeley) 5/31/93"; 37 #endif 38 #endif /* not lint */ 39 #include <sys/cdefs.h> 40 __FBSDID("$FreeBSD$"); 41 42 #include <sys/types.h> 43 #include <sys/time.h> 44 #include <sys/stat.h> 45 #include <pwd.h> 46 #include <grp.h> 47 #include <stdio.h> 48 #include <string.h> 49 #include <strings.h> 50 #include <unistd.h> 51 #include <stdlib.h> 52 #include "pax.h" 53 #include "sel_subs.h" 54 #include "extern.h" 55 56 static int str_sec(char *, time_t *); 57 static int usr_match(ARCHD *); 58 static int grp_match(ARCHD *); 59 static int trng_match(ARCHD *); 60 61 static TIME_RNG *trhead = NULL; /* time range list head */ 62 static TIME_RNG *trtail = NULL; /* time range list tail */ 63 static USRT **usrtb = NULL; /* user selection table */ 64 static GRPT **grptb = NULL; /* group selection table */ 65 66 /* 67 * Routines for selection of archive members 68 */ 69 70 /* 71 * sel_chk() 72 * check if this file matches a specified uid, gid or time range 73 * Return: 74 * 0 if this archive member should be processed, 1 if it should be skipped 75 */ 76 77 int 78 sel_chk(ARCHD *arcn) 79 { 80 if (((usrtb != NULL) && usr_match(arcn)) || 81 ((grptb != NULL) && grp_match(arcn)) || 82 ((trhead != NULL) && trng_match(arcn))) 83 return(1); 84 return(0); 85 } 86 87 /* 88 * User/group selection routines 89 * 90 * Routines to handle user selection of files based on the file uid/gid. To 91 * add an entry, the user supplies either then name or the uid/gid starting with 92 * a # on the command line. A \# will escape the #. 93 */ 94 95 /* 96 * usr_add() 97 * add a user match to the user match hash table 98 * Return: 99 * 0 if added ok, -1 otherwise; 100 */ 101 102 int 103 usr_add(char *str) 104 { 105 u_int indx; 106 USRT *pt; 107 struct passwd *pw; 108 uid_t uid; 109 110 /* 111 * create the table if it doesn't exist 112 */ 113 if ((str == NULL) || (*str == '\0')) 114 return(-1); 115 if ((usrtb == NULL) && 116 ((usrtb = (USRT **)calloc(USR_TB_SZ, sizeof(USRT *))) == NULL)) { 117 paxwarn(1, "Unable to allocate memory for user selection table"); 118 return(-1); 119 } 120 121 /* 122 * figure out user spec 123 */ 124 if (str[0] != '#') { 125 /* 126 * it is a user name, \# escapes # as first char in user name 127 */ 128 if ((str[0] == '\\') && (str[1] == '#')) 129 ++str; 130 if ((pw = getpwnam(str)) == NULL) { 131 paxwarn(1, "Unable to find uid for user: %s", str); 132 return(-1); 133 } 134 uid = (uid_t)pw->pw_uid; 135 } else 136 # ifdef NET2_STAT 137 uid = (uid_t)atoi(str+1); 138 # else 139 uid = (uid_t)strtoul(str+1, NULL, 10); 140 # endif 141 endpwent(); 142 143 /* 144 * hash it and go down the hash chain (if any) looking for it 145 */ 146 indx = ((unsigned)uid) % USR_TB_SZ; 147 if ((pt = usrtb[indx]) != NULL) { 148 while (pt != NULL) { 149 if (pt->uid == uid) 150 return(0); 151 pt = pt->fow; 152 } 153 } 154 155 /* 156 * uid is not yet in the table, add it to the front of the chain 157 */ 158 if ((pt = (USRT *)malloc(sizeof(USRT))) != NULL) { 159 pt->uid = uid; 160 pt->fow = usrtb[indx]; 161 usrtb[indx] = pt; 162 return(0); 163 } 164 paxwarn(1, "User selection table out of memory"); 165 return(-1); 166 } 167 168 /* 169 * usr_match() 170 * check if this files uid matches a selected uid. 171 * Return: 172 * 0 if this archive member should be processed, 1 if it should be skipped 173 */ 174 175 static int 176 usr_match(ARCHD *arcn) 177 { 178 USRT *pt; 179 180 /* 181 * hash and look for it in the table 182 */ 183 pt = usrtb[((unsigned)arcn->sb.st_uid) % USR_TB_SZ]; 184 while (pt != NULL) { 185 if (pt->uid == arcn->sb.st_uid) 186 return(0); 187 pt = pt->fow; 188 } 189 190 /* 191 * not found 192 */ 193 return(1); 194 } 195 196 /* 197 * grp_add() 198 * add a group match to the group match hash table 199 * Return: 200 * 0 if added ok, -1 otherwise; 201 */ 202 203 int 204 grp_add(char *str) 205 { 206 u_int indx; 207 GRPT *pt; 208 struct group *gr; 209 gid_t gid; 210 211 /* 212 * create the table if it doesn't exist 213 */ 214 if ((str == NULL) || (*str == '\0')) 215 return(-1); 216 if ((grptb == NULL) && 217 ((grptb = (GRPT **)calloc(GRP_TB_SZ, sizeof(GRPT *))) == NULL)) { 218 paxwarn(1, "Unable to allocate memory fo group selection table"); 219 return(-1); 220 } 221 222 /* 223 * figure out user spec 224 */ 225 if (str[0] != '#') { 226 /* 227 * it is a group name, \# escapes # as first char in group name 228 */ 229 if ((str[0] == '\\') && (str[1] == '#')) 230 ++str; 231 if ((gr = getgrnam(str)) == NULL) { 232 paxwarn(1,"Cannot determine gid for group name: %s", str); 233 return(-1); 234 } 235 gid = gr->gr_gid; 236 } else 237 # ifdef NET2_STAT 238 gid = (gid_t)atoi(str+1); 239 # else 240 gid = (gid_t)strtoul(str+1, NULL, 10); 241 # endif 242 endgrent(); 243 244 /* 245 * hash it and go down the hash chain (if any) looking for it 246 */ 247 indx = ((unsigned)gid) % GRP_TB_SZ; 248 if ((pt = grptb[indx]) != NULL) { 249 while (pt != NULL) { 250 if (pt->gid == gid) 251 return(0); 252 pt = pt->fow; 253 } 254 } 255 256 /* 257 * gid not in the table, add it to the front of the chain 258 */ 259 if ((pt = (GRPT *)malloc(sizeof(GRPT))) != NULL) { 260 pt->gid = gid; 261 pt->fow = grptb[indx]; 262 grptb[indx] = pt; 263 return(0); 264 } 265 paxwarn(1, "Group selection table out of memory"); 266 return(-1); 267 } 268 269 /* 270 * grp_match() 271 * check if this files gid matches a selected gid. 272 * Return: 273 * 0 if this archive member should be processed, 1 if it should be skipped 274 */ 275 276 static int 277 grp_match(ARCHD *arcn) 278 { 279 GRPT *pt; 280 281 /* 282 * hash and look for it in the table 283 */ 284 pt = grptb[((unsigned)arcn->sb.st_gid) % GRP_TB_SZ]; 285 while (pt != NULL) { 286 if (pt->gid == arcn->sb.st_gid) 287 return(0); 288 pt = pt->fow; 289 } 290 291 /* 292 * not found 293 */ 294 return(1); 295 } 296 297 /* 298 * Time range selection routines 299 * 300 * Routines to handle user selection of files based on the modification and/or 301 * inode change time falling within a specified time range (the non-standard 302 * -T flag). The user may specify any number of different file time ranges. 303 * Time ranges are checked one at a time until a match is found (if at all). 304 * If the file has a mtime (and/or ctime) which lies within one of the time 305 * ranges, the file is selected. Time ranges may have a lower and/or an upper 306 * value. These ranges are inclusive. When no time ranges are supplied to pax 307 * with the -T option, all members in the archive will be selected by the time 308 * range routines. When only a lower range is supplied, only files with a 309 * mtime (and/or ctime) equal to or younger are selected. When only an upper 310 * range is supplied, only files with a mtime (and/or ctime) equal to or older 311 * are selected. When the lower time range is equal to the upper time range, 312 * only files with a mtime (or ctime) of exactly that time are selected. 313 */ 314 315 /* 316 * trng_add() 317 * add a time range match to the time range list. 318 * This is a non-standard pax option. Lower and upper ranges are in the 319 * format: [yy[mm[dd[hh]]]]mm[.ss] and are comma separated. 320 * Time ranges are based on current time, so 1234 would specify a time of 321 * 12:34 today. 322 * Return: 323 * 0 if the time range was added to the list, -1 otherwise 324 */ 325 326 int 327 trng_add(char *str) 328 { 329 TIME_RNG *pt; 330 char *up_pt = NULL; 331 char *stpt; 332 char *flgpt; 333 int dot = 0; 334 335 /* 336 * throw out the badly formed time ranges 337 */ 338 if ((str == NULL) || (*str == '\0')) { 339 paxwarn(1, "Empty time range string"); 340 return(-1); 341 } 342 343 /* 344 * locate optional flags suffix /{cm}. 345 */ 346 if ((flgpt = strrchr(str, '/')) != NULL) 347 *flgpt++ = '\0'; 348 349 for (stpt = str; *stpt != '\0'; ++stpt) { 350 if ((*stpt >= '0') && (*stpt <= '9')) 351 continue; 352 if ((*stpt == ',') && (up_pt == NULL)) { 353 *stpt = '\0'; 354 up_pt = stpt + 1; 355 dot = 0; 356 continue; 357 } 358 359 /* 360 * allow only one dot per range (secs) 361 */ 362 if ((*stpt == '.') && (!dot)) { 363 ++dot; 364 continue; 365 } 366 paxwarn(1, "Improperly specified time range: %s", str); 367 goto out; 368 } 369 370 /* 371 * allocate space for the time range and store the limits 372 */ 373 if ((pt = (TIME_RNG *)malloc(sizeof(TIME_RNG))) == NULL) { 374 paxwarn(1, "Unable to allocate memory for time range"); 375 return(-1); 376 } 377 378 /* 379 * by default we only will check file mtime, but usee can specify 380 * mtime, ctime (inode change time) or both. 381 */ 382 if ((flgpt == NULL) || (*flgpt == '\0')) 383 pt->flgs = CMPMTME; 384 else { 385 pt->flgs = 0; 386 while (*flgpt != '\0') { 387 switch(*flgpt) { 388 case 'M': 389 case 'm': 390 pt->flgs |= CMPMTME; 391 break; 392 case 'C': 393 case 'c': 394 pt->flgs |= CMPCTME; 395 break; 396 default: 397 paxwarn(1, "Bad option %c with time range %s", 398 *flgpt, str); 399 goto out; 400 } 401 ++flgpt; 402 } 403 } 404 405 /* 406 * start off with the current time 407 */ 408 pt->low_time = pt->high_time = time(NULL); 409 if (*str != '\0') { 410 /* 411 * add lower limit 412 */ 413 if (str_sec(str, &(pt->low_time)) < 0) { 414 paxwarn(1, "Illegal lower time range %s", str); 415 free(pt); 416 goto out; 417 } 418 pt->flgs |= HASLOW; 419 } 420 421 if ((up_pt != NULL) && (*up_pt != '\0')) { 422 /* 423 * add upper limit 424 */ 425 if (str_sec(up_pt, &(pt->high_time)) < 0) { 426 paxwarn(1, "Illegal upper time range %s", up_pt); 427 free(pt); 428 goto out; 429 } 430 pt->flgs |= HASHIGH; 431 432 /* 433 * check that the upper and lower do not overlap 434 */ 435 if (pt->flgs & HASLOW) { 436 if (pt->low_time > pt->high_time) { 437 paxwarn(1, "Upper %s and lower %s time overlap", 438 up_pt, str); 439 free(pt); 440 return(-1); 441 } 442 } 443 } 444 445 pt->fow = NULL; 446 if (trhead == NULL) { 447 trtail = trhead = pt; 448 return(0); 449 } 450 trtail->fow = pt; 451 trtail = pt; 452 return(0); 453 454 out: 455 paxwarn(1, "Time range format is: [yy[mm[dd[hh]]]]mm[.ss][/[c][m]]"); 456 return(-1); 457 } 458 459 /* 460 * trng_match() 461 * check if this files mtime/ctime falls within any supplied time range. 462 * Return: 463 * 0 if this archive member should be processed, 1 if it should be skipped 464 */ 465 466 static int 467 trng_match(ARCHD *arcn) 468 { 469 TIME_RNG *pt; 470 471 /* 472 * have to search down the list one at a time looking for a match. 473 * remember time range limits are inclusive. 474 */ 475 pt = trhead; 476 while (pt != NULL) { 477 switch(pt->flgs & CMPBOTH) { 478 case CMPBOTH: 479 /* 480 * user wants both mtime and ctime checked for this 481 * time range 482 */ 483 if (((pt->flgs & HASLOW) && 484 (arcn->sb.st_mtime < pt->low_time) && 485 (arcn->sb.st_ctime < pt->low_time)) || 486 ((pt->flgs & HASHIGH) && 487 (arcn->sb.st_mtime > pt->high_time) && 488 (arcn->sb.st_ctime > pt->high_time))) { 489 pt = pt->fow; 490 continue; 491 } 492 break; 493 case CMPCTME: 494 /* 495 * user wants only ctime checked for this time range 496 */ 497 if (((pt->flgs & HASLOW) && 498 (arcn->sb.st_ctime < pt->low_time)) || 499 ((pt->flgs & HASHIGH) && 500 (arcn->sb.st_ctime > pt->high_time))) { 501 pt = pt->fow; 502 continue; 503 } 504 break; 505 case CMPMTME: 506 default: 507 /* 508 * user wants only mtime checked for this time range 509 */ 510 if (((pt->flgs & HASLOW) && 511 (arcn->sb.st_mtime < pt->low_time)) || 512 ((pt->flgs & HASHIGH) && 513 (arcn->sb.st_mtime > pt->high_time))) { 514 pt = pt->fow; 515 continue; 516 } 517 break; 518 } 519 break; 520 } 521 522 if (pt == NULL) 523 return(1); 524 return(0); 525 } 526 527 /* 528 * str_sec() 529 * Convert a time string in the format of [yy[mm[dd[hh]]]]mm[.ss] to gmt 530 * seconds. Tval already has current time loaded into it at entry. 531 * Return: 532 * 0 if converted ok, -1 otherwise 533 */ 534 535 static int 536 str_sec(char *str, time_t *tval) 537 { 538 struct tm *lt; 539 char *dot = NULL; 540 541 lt = localtime(tval); 542 if ((dot = strchr(str, '.')) != NULL) { 543 /* 544 * seconds (.ss) 545 */ 546 *dot++ = '\0'; 547 if (strlen(dot) != 2) 548 return(-1); 549 if ((lt->tm_sec = ATOI2(dot)) > 61) 550 return(-1); 551 } else 552 lt->tm_sec = 0; 553 554 switch (strlen(str)) { 555 case 10: 556 /* 557 * year (yy) 558 * watch out for year 2000 559 */ 560 if ((lt->tm_year = ATOI2(str)) < 69) 561 lt->tm_year += 100; 562 str += 2; 563 /* FALLTHROUGH */ 564 case 8: 565 /* 566 * month (mm) 567 * watch out months are from 0 - 11 internally 568 */ 569 if ((lt->tm_mon = ATOI2(str)) > 12) 570 return(-1); 571 --lt->tm_mon; 572 str += 2; 573 /* FALLTHROUGH */ 574 case 6: 575 /* 576 * day (dd) 577 */ 578 if ((lt->tm_mday = ATOI2(str)) > 31) 579 return(-1); 580 str += 2; 581 /* FALLTHROUGH */ 582 case 4: 583 /* 584 * hour (hh) 585 */ 586 if ((lt->tm_hour = ATOI2(str)) > 23) 587 return(-1); 588 str += 2; 589 /* FALLTHROUGH */ 590 case 2: 591 /* 592 * minute (mm) 593 */ 594 if ((lt->tm_min = ATOI2(str)) > 59) 595 return(-1); 596 break; 597 default: 598 return(-1); 599 } 600 /* 601 * convert broken-down time to GMT clock time seconds 602 */ 603 if ((*tval = mktime(lt)) == -1) 604 return(-1); 605 return(0); 606 } 607