1 /* $NetBSD: ftree.c,v 1.38 2008/02/24 20:42:46 joerg Exp $ */ 2 3 /*- 4 * Copyright (c) 1992 Keith Muller. 5 * Copyright (c) 1992, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * Keith Muller of the University of California, San Diego. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 /*- 37 * Copyright (c) 2001 The NetBSD Foundation, Inc. 38 * All rights reserved. 39 * 40 * This code is derived from software contributed to The NetBSD Foundation 41 * by Luke Mewburn of Wasabi Systems. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. All advertising materials mentioning features or use of this software 52 * must display the following acknowledgement: 53 * This product includes software developed by the NetBSD 54 * Foundation, Inc. and its contributors. 55 * 4. Neither the name of The NetBSD Foundation nor the names of its 56 * contributors may be used to endorse or promote products derived 57 * from this software without specific prior written permission. 58 * 59 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 60 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 61 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 62 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 63 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 64 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 65 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 66 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 67 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 68 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 69 * POSSIBILITY OF SUCH DAMAGE. 70 */ 71 72 #if HAVE_NBTOOL_CONFIG_H 73 #include "nbtool_config.h" 74 #endif 75 76 #include <sys/cdefs.h> 77 #if !defined(lint) 78 #if 0 79 static char sccsid[] = "@(#)ftree.c 8.2 (Berkeley) 4/18/94"; 80 #else 81 __RCSID("$NetBSD: ftree.c,v 1.38 2008/02/24 20:42:46 joerg Exp $"); 82 #endif 83 #endif /* not lint */ 84 85 #include <sys/types.h> 86 #include <sys/time.h> 87 #include <sys/stat.h> 88 #include <sys/param.h> 89 #include <ctype.h> 90 #include <errno.h> 91 #include <fts.h> 92 #include <stdio.h> 93 #include <stdlib.h> 94 #include <string.h> 95 #include <unistd.h> 96 #include "pax.h" 97 #include "ftree.h" 98 #include "extern.h" 99 #include "options.h" 100 #ifndef SMALL 101 #include "mtree.h" 102 #endif /* SMALL */ 103 104 /* 105 * routines to interface with the fts library function. 106 * 107 * file args supplied to pax are stored on a single linked list (of type FTREE) 108 * and given to fts to be processed one at a time. pax "selects" files from 109 * the expansion of each arg into the corresponding file tree (if the arg is a 110 * directory, otherwise the node itself is just passed to pax). The selection 111 * is modified by the -n and -u flags. The user is informed when a specific 112 * file arg does not generate any selected files. -n keeps expanding the file 113 * tree arg until one of its files is selected, then skips to the next file 114 * arg. when the user does not supply the file trees as command line args to 115 * pax, they are read from stdin 116 */ 117 118 static FTS *ftsp = NULL; /* current FTS handle */ 119 static int ftsopts; /* options to be used on fts_open */ 120 static char *farray[2]; /* array for passing each arg to fts */ 121 static FTREE *fthead = NULL; /* head of linked list of file args */ 122 static FTREE *fttail = NULL; /* tail of linked list of file args */ 123 static FTREE *ftcur = NULL; /* current file arg being processed */ 124 static FTSENT *ftent = NULL; /* current file tree entry */ 125 static int ftree_skip; /* when set skip to next file arg */ 126 #ifndef SMALL 127 static NODE *ftnode = NULL; /* mtree(8) specfile; used by -M */ 128 #endif /* SMALL */ 129 130 static int ftree_arg(void); 131 132 #define FTS_ERRNO(x) (x)->fts_errno 133 134 /* 135 * ftree_start() 136 * initialize the options passed to fts_open() during this run of pax 137 * options are based on the selection of pax options by the user 138 * fts_start() also calls fts_arg() to open the first valid file arg. We 139 * also attempt to reset directory access times when -t (tflag) is set. 140 * Return: 141 * 0 if there is at least one valid file arg to process, -1 otherwise 142 */ 143 144 int 145 ftree_start() 146 { 147 148 #ifndef SMALL 149 /* 150 * if -M is given, the list of filenames on stdin is actually 151 * an mtree(8) specfile, so parse the specfile into a NODE * 152 * tree at ftnode, for use by next_file() 153 */ 154 if (Mflag) { 155 if (fthead != NULL) { 156 tty_warn(1, 157 "The -M flag is only supported when reading file list from stdin"); 158 return -1; 159 } 160 ftnode = spec(stdin); 161 if (ftnode != NULL && 162 (ftnode->type != F_DIR || strcmp(ftnode->name, ".") != 0)) { 163 tty_warn(1, 164 "First node of specfile is not `.' directory"); 165 return -1; 166 } 167 return 0; 168 } 169 #endif /* SMALL */ 170 171 /* 172 * set up the operation mode of fts, open the first file arg. We must 173 * use FTS_NOCHDIR, as the user may have to open multiple archives and 174 * if fts did a chdir off into the boondocks, we may create an archive 175 * volume in an place where the user did not expect to. 176 */ 177 ftsopts = FTS_NOCHDIR; 178 179 /* 180 * optional user flags that effect file traversal 181 * -H command line symlink follow only (half follow) 182 * -L follow sylinks (logical) 183 * -P do not follow sylinks (physical). This is the default. 184 * -X do not cross over mount points 185 * -t preserve access times on files read. 186 * -n select only the first member of a file tree when a match is found 187 * -d do not extract subtrees rooted at a directory arg. 188 */ 189 if (Lflag) 190 ftsopts |= FTS_LOGICAL; 191 else 192 ftsopts |= FTS_PHYSICAL; 193 if (Hflag) 194 ftsopts |= FTS_COMFOLLOW; 195 if (Xflag) 196 ftsopts |= FTS_XDEV; 197 198 if ((fthead == NULL) && ((farray[0] = malloc(PAXPATHLEN+2)) == NULL)) { 199 tty_warn(1, "Unable to allocate memory for file name buffer"); 200 return -1; 201 } 202 203 if (ftree_arg() < 0) 204 return -1; 205 if (tflag && (atdir_start() < 0)) 206 return -1; 207 return 0; 208 } 209 210 /* 211 * ftree_add() 212 * add the arg to the linked list of files to process. Each will be 213 * processed by fts one at a time 214 * Return: 215 * 0 if added to the linked list, -1 if failed 216 */ 217 218 int 219 ftree_add(char *str, int isdir) 220 { 221 FTREE *ft; 222 int len; 223 224 /* 225 * simple check for bad args 226 */ 227 if ((str == NULL) || (*str == '\0')) { 228 tty_warn(0, "Invalid file name argument"); 229 return -1; 230 } 231 232 /* 233 * allocate FTREE node and add to the end of the linked list (args are 234 * processed in the same order they were passed to pax). Get rid of any 235 * trailing / the user may pass us. (watch out for / by itself). 236 */ 237 if ((ft = (FTREE *)malloc(sizeof(FTREE))) == NULL) { 238 tty_warn(0, "Unable to allocate memory for filename"); 239 return -1; 240 } 241 242 if (((len = strlen(str) - 1) > 0) && (str[len] == '/')) 243 str[len] = '\0'; 244 ft->fname = str; 245 ft->refcnt = -isdir; 246 ft->fow = NULL; 247 if (fthead == NULL) { 248 fttail = fthead = ft; 249 return 0; 250 } 251 fttail->fow = ft; 252 fttail = ft; 253 return 0; 254 } 255 256 /* 257 * ftree_sel() 258 * this entry has been selected by pax. bump up reference count and handle 259 * -n and -d processing. 260 */ 261 262 void 263 ftree_sel(ARCHD *arcn) 264 { 265 /* 266 * set reference bit for this pattern. This linked list is only used 267 * when file trees are supplied pax as args. The list is not used when 268 * the trees are read from stdin. 269 */ 270 if (ftcur != NULL) 271 ftcur->refcnt = 1; 272 273 /* 274 * if -n we are done with this arg, force a skip to the next arg when 275 * pax asks for the next file in next_file(). 276 * if -M we don't use fts(3), so the rest of this function is moot. 277 * if -d we tell fts only to match the directory (if the arg is a dir) 278 * and not the entire file tree rooted at that point. 279 */ 280 if (nflag) 281 ftree_skip = 1; 282 283 if (Mflag || !dflag || (arcn->type != PAX_DIR)) 284 return; 285 286 if (ftent != NULL) 287 (void)fts_set(ftsp, ftent, FTS_SKIP); 288 } 289 290 /* 291 * ftree_chk() 292 * called at end on pax execution. Prints all those file args that did not 293 * have a selected member (reference count still 0) 294 */ 295 296 void 297 ftree_chk(void) 298 { 299 FTREE *ft; 300 int wban = 0; 301 302 /* 303 * make sure all dir access times were reset. 304 */ 305 if (tflag) 306 atdir_end(); 307 308 /* 309 * walk down list and check reference count. Print out those members 310 * that never had a match 311 */ 312 for (ft = fthead; ft != NULL; ft = ft->fow) { 313 if (ft->refcnt != 0) 314 continue; 315 if (wban == 0) { 316 tty_warn(1, 317 "WARNING! These file names were not selected:"); 318 ++wban; 319 } 320 (void)fprintf(stderr, "%s\n", ft->fname); 321 } 322 } 323 324 /* 325 * ftree_arg() 326 * Get the next file arg for fts to process. Can be from either the linked 327 * list or read from stdin when the user did not them as args to pax. Each 328 * arg is processed until the first successful fts_open(). 329 * Return: 330 * 0 when the next arg is ready to go, -1 if out of file args (or EOF on 331 * stdin). 332 */ 333 334 static int 335 ftree_arg(void) 336 { 337 /* 338 * close off the current file tree 339 */ 340 if (ftsp != NULL) { 341 (void)fts_close(ftsp); 342 ftsp = NULL; 343 ftent = NULL; 344 } 345 346 /* 347 * keep looping until we get a valid file tree to process. Stop when we 348 * reach the end of the list (or get an eof on stdin) 349 */ 350 for(;;) { 351 if (fthead == NULL) { 352 int i, c = EOF; 353 /* 354 * the user didn't supply any args, get the file trees 355 * to process from stdin; 356 */ 357 for (i = 0; i < PAXPATHLEN + 2; i++) { 358 c = getchar(); 359 if (c == EOF) 360 break; 361 else if (c == sep) { 362 if (i != 0) 363 break; 364 } else 365 farray[0][i] = c; 366 } 367 if (i == 0) 368 return -1; 369 farray[0][i] = '\0'; 370 } else { 371 /* 372 * the user supplied the file args as arguments to pax 373 */ 374 if (ftcur == NULL) 375 ftcur = fthead; 376 else if ((ftcur = ftcur->fow) == NULL) 377 return -1; 378 379 if (ftcur->refcnt < 0) { 380 /* 381 * chdir entry. 382 * Change directory and retry loop. 383 */ 384 if (ar_dochdir(ftcur->fname)) 385 return (-1); 386 continue; 387 } 388 farray[0] = ftcur->fname; 389 } 390 391 /* 392 * watch it, fts wants the file arg stored in a array of char 393 * ptrs, with the last one a null. we use a two element array 394 * and set farray[0] to point at the buffer with the file name 395 * in it. We cannot pass all the file args to fts at one shot 396 * as we need to keep a handle on which file arg generates what 397 * files (the -n and -d flags need this). If the open is 398 * successful, return a 0. 399 */ 400 if ((ftsp = fts_open(farray, ftsopts, NULL)) != NULL) 401 break; 402 } 403 return 0; 404 } 405 406 /* 407 * next_file() 408 * supplies the next file to process in the supplied archd structure. 409 * Return: 410 * 0 when contents of arcn have been set with the next file, -1 when done. 411 */ 412 413 int 414 next_file(ARCHD *arcn) 415 { 416 #ifndef SMALL 417 static char curdir[PAXPATHLEN+2], curpath[PAXPATHLEN+2]; 418 static int curdirlen; 419 420 struct stat statbuf; 421 FTSENT Mftent; 422 #endif /* SMALL */ 423 int cnt; 424 time_t atime, mtime; 425 char *curlink; 426 #define MFTENT_DUMMY_DEV UINT_MAX 427 428 curlink = NULL; 429 #ifndef SMALL 430 /* 431 * if parsing an mtree(8) specfile, build up `dummy' ftsent 432 * from specfile info, and jump below to complete setup of arcn. 433 */ 434 if (Mflag) { 435 int skipoptional; 436 437 next_ftnode: 438 skipoptional = 0; 439 if (ftnode == NULL) /* tree is empty */ 440 return (-1); 441 442 /* get current name */ 443 if (snprintf(curpath, sizeof(curpath), "%s%s%s", 444 curdir, curdirlen ? "/" : "", ftnode->name) 445 >= sizeof(curpath)) { 446 tty_warn(1, "line %lu: %s: %s", (u_long)ftnode->lineno, 447 curdir, strerror(ENAMETOOLONG)); 448 return (-1); 449 } 450 ftnode->flags |= F_VISIT; /* mark node visited */ 451 452 /* construct dummy FTSENT */ 453 Mftent.fts_path = curpath; 454 Mftent.fts_statp = &statbuf; 455 Mftent.fts_pointer = ftnode; 456 ftent = &Mftent; 457 /* look for existing file */ 458 if (lstat(Mftent.fts_path, &statbuf) == -1) { 459 if (ftnode->flags & F_OPT) 460 skipoptional = 1; 461 462 /* missing: fake up stat info */ 463 memset(&statbuf, 0, sizeof(statbuf)); 464 statbuf.st_dev = MFTENT_DUMMY_DEV; 465 statbuf.st_ino = ftnode->lineno; 466 statbuf.st_size = 0; 467 #define NODETEST(t, m) \ 468 if (!(t)) { \ 469 tty_warn(1, "line %lu: %s: %s not specified", \ 470 (u_long)ftnode->lineno, \ 471 ftent->fts_path, m); \ 472 return -1; \ 473 } 474 statbuf.st_mode = nodetoino(ftnode->type); 475 NODETEST(ftnode->flags & F_TYPE, "type"); 476 NODETEST(ftnode->flags & F_MODE, "mode"); 477 if (!(ftnode->flags & F_TIME)) 478 statbuf.st_mtime = starttime; 479 NODETEST(ftnode->flags & (F_GID | F_GNAME), "group"); 480 NODETEST(ftnode->flags & (F_UID | F_UNAME), "user"); 481 if (ftnode->type == F_BLOCK || ftnode->type == F_CHAR) 482 NODETEST(ftnode->flags & F_DEV, 483 "device number"); 484 if (ftnode->type == F_LINK) 485 NODETEST(ftnode->flags & F_SLINK, "symlink"); 486 /* don't require F_FLAGS or F_SIZE */ 487 #undef NODETEST 488 } else { 489 if (ftnode->flags & F_TYPE && nodetoino(ftnode->type) 490 != (statbuf.st_mode & S_IFMT)) { 491 tty_warn(1, 492 "line %lu: %s: type mismatch: specfile %s, tree %s", 493 (u_long)ftnode->lineno, ftent->fts_path, 494 inotype(nodetoino(ftnode->type)), 495 inotype(statbuf.st_mode)); 496 return -1; 497 } 498 if (ftnode->type == F_DIR && (ftnode->flags & F_OPT)) 499 skipoptional = 1; 500 } 501 /* 502 * override settings with those from specfile 503 */ 504 if (ftnode->flags & F_MODE) { 505 statbuf.st_mode &= ~ALLPERMS; 506 statbuf.st_mode |= (ftnode->st_mode & ALLPERMS); 507 } 508 if (ftnode->flags & (F_GID | F_GNAME)) 509 statbuf.st_gid = ftnode->st_gid; 510 if (ftnode->flags & (F_UID | F_UNAME)) 511 statbuf.st_uid = ftnode->st_uid; 512 #if HAVE_STRUCT_STAT_ST_FLAGS 513 if (ftnode->flags & F_FLAGS) 514 statbuf.st_flags = ftnode->st_flags; 515 #endif 516 if (ftnode->flags & F_TIME) 517 #if BSD4_4 && !HAVE_NBTOOL_CONFIG_H 518 statbuf.st_mtimespec = ftnode->st_mtimespec; 519 #else 520 statbuf.st_mtime = ftnode->st_mtimespec.tv_sec; 521 #endif 522 if (ftnode->flags & F_DEV) 523 statbuf.st_rdev = ftnode->st_rdev; 524 if (ftnode->flags & F_SLINK) 525 curlink = ftnode->slink; 526 /* ignore F_SIZE */ 527 528 /* 529 * find next node 530 */ 531 if (ftnode->type == F_DIR && ftnode->child != NULL) { 532 /* directory with unseen child */ 533 ftnode = ftnode->child; 534 curdirlen = strlcpy(curdir, curpath, sizeof(curdir)); 535 } else do { 536 if (ftnode->next != NULL) { 537 /* next node at current level */ 538 ftnode = ftnode->next; 539 } else { /* move back to parent */ 540 /* reset time only on first cd.. */ 541 if (Mftent.fts_pointer == ftnode && tflag && 542 (get_atdir(MFTENT_DUMMY_DEV, ftnode->lineno, 543 &mtime, &atime) == 0)) { 544 set_ftime(ftent->fts_path, 545 mtime, atime, 1, 0); 546 } 547 ftnode = ftnode->parent; 548 if (ftnode->parent == ftnode) 549 ftnode = NULL; 550 else { 551 curdirlen -= strlen(ftnode->name) + 1; 552 curdir[curdirlen] = '\0'; 553 } 554 } 555 } while (ftnode != NULL && ftnode->flags & F_VISIT); 556 if (skipoptional) /* skip optional entries */ 557 goto next_ftnode; 558 goto got_ftent; 559 } 560 #endif /* SMALL */ 561 562 /* 563 * ftree_sel() might have set the ftree_skip flag if the user has the 564 * -n option and a file was selected from this file arg tree. (-n says 565 * only one member is matched for each pattern) ftree_skip being 1 566 * forces us to go to the next arg now. 567 */ 568 if (ftree_skip) { 569 /* 570 * clear and go to next arg 571 */ 572 ftree_skip = 0; 573 if (ftree_arg() < 0) 574 return -1; 575 } 576 577 if (ftsp == NULL) 578 return -1; 579 /* 580 * loop until we get a valid file to process 581 */ 582 for(;;) { 583 if ((ftent = fts_read(ftsp)) == NULL) { 584 /* 585 * out of files in this tree, go to next arg, if none 586 * we are done 587 */ 588 if (ftree_arg() < 0) 589 return -1; 590 continue; 591 } 592 593 /* 594 * handle each type of fts_read() flag 595 */ 596 switch(ftent->fts_info) { 597 case FTS_D: 598 case FTS_DEFAULT: 599 case FTS_F: 600 case FTS_SL: 601 case FTS_SLNONE: 602 /* 603 * these are all ok 604 */ 605 break; 606 case FTS_DP: 607 /* 608 * already saw this directory. If the user wants file 609 * access times reset, we use this to restore the 610 * access time for this directory since this is the 611 * last time we will see it in this file subtree 612 * remember to force the time (this is -t on a read 613 * directory, not a created directory). 614 */ 615 if (!tflag || (get_atdir( 616 ftent->fts_statp->st_dev, ftent->fts_statp->st_ino, 617 &mtime, &atime) < 0)) 618 continue; 619 set_ftime(ftent->fts_path, mtime, atime, 1, 0); 620 continue; 621 case FTS_DC: 622 /* 623 * fts claims a file system cycle 624 */ 625 tty_warn(1,"File system cycle found at %s", 626 ftent->fts_path); 627 continue; 628 case FTS_DNR: 629 syswarn(1, FTS_ERRNO(ftent), 630 "Unable to read directory %s", ftent->fts_path); 631 continue; 632 case FTS_ERR: 633 syswarn(1, FTS_ERRNO(ftent), 634 "File system traversal error"); 635 continue; 636 case FTS_NS: 637 case FTS_NSOK: 638 syswarn(1, FTS_ERRNO(ftent), 639 "Unable to access %s", ftent->fts_path); 640 continue; 641 } 642 643 #ifndef SMALL 644 got_ftent: 645 #endif /* SMALL */ 646 /* 647 * ok got a file tree node to process. copy info into arcn 648 * structure (initialize as required) 649 */ 650 arcn->skip = 0; 651 arcn->pad = 0; 652 arcn->ln_nlen = 0; 653 arcn->ln_name[0] = '\0'; 654 arcn->sb = *(ftent->fts_statp); 655 656 /* 657 * file type based set up and copy into the arcn struct 658 * SIDE NOTE: 659 * we try to reset the access time on all files and directories 660 * we may read when the -t flag is specified. files are reset 661 * when we close them after copying. we reset the directories 662 * when we are done with their file tree (we also clean up at 663 * end in case we cut short a file tree traversal). However 664 * there is no way to reset access times on symlinks. 665 */ 666 switch(S_IFMT & arcn->sb.st_mode) { 667 case S_IFDIR: 668 arcn->type = PAX_DIR; 669 if (!tflag) 670 break; 671 add_atdir(ftent->fts_path, arcn->sb.st_dev, 672 arcn->sb.st_ino, arcn->sb.st_mtime, 673 arcn->sb.st_atime); 674 break; 675 case S_IFCHR: 676 arcn->type = PAX_CHR; 677 break; 678 case S_IFBLK: 679 arcn->type = PAX_BLK; 680 break; 681 case S_IFREG: 682 /* 683 * only regular files with have data to store on the 684 * archive. all others will store a zero length skip. 685 * the skip field is used by pax for actual data it has 686 * to read (or skip over). 687 */ 688 arcn->type = PAX_REG; 689 arcn->skip = arcn->sb.st_size; 690 break; 691 case S_IFLNK: 692 arcn->type = PAX_SLK; 693 if (curlink != NULL) { 694 cnt = strlcpy(arcn->ln_name, curlink, 695 sizeof(arcn->ln_name)); 696 /* 697 * have to read the symlink path from the file 698 */ 699 } else if ((cnt = 700 readlink(ftent->fts_path, arcn->ln_name, 701 sizeof(arcn->ln_name) - 1)) < 0) { 702 syswarn(1, errno, "Unable to read symlink %s", 703 ftent->fts_path); 704 continue; 705 } 706 /* 707 * set link name length, watch out readlink does not 708 * always null terminate the link path 709 */ 710 arcn->ln_name[cnt] = '\0'; 711 arcn->ln_nlen = cnt; 712 break; 713 #ifdef S_IFSOCK 714 case S_IFSOCK: 715 /* 716 * under BSD storing a socket is senseless but we will 717 * let the format specific write function make the 718 * decision of what to do with it. 719 */ 720 arcn->type = PAX_SCK; 721 break; 722 #endif 723 case S_IFIFO: 724 arcn->type = PAX_FIF; 725 break; 726 } 727 break; 728 } 729 730 /* 731 * copy file name, set file name length 732 */ 733 arcn->nlen = strlcpy(arcn->name, ftent->fts_path, sizeof(arcn->name)); 734 arcn->org_name = arcn->fts_name; 735 strlcpy(arcn->fts_name, ftent->fts_path, sizeof arcn->fts_name); 736 if (strcmp(NM_CPIO, argv0) == 0) { 737 /* 738 * cpio does *not* descend directories listed in the 739 * arguments, unlike pax/tar, so needs special handling 740 * here. failure to do so results in massive amounts 741 * of duplicated files in the output. We kill fts after 742 * the first name is extracted, what a waste. 743 */ 744 ftcur->refcnt = 1; 745 (void)ftree_arg(); 746 } 747 return 0; 748 } 749