bin/pax/ftree.c

   1 /*      $NetBSD: ftree.c,v 1.39 2008/04/28 20:22:51 martin 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  *
  52  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  53  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  54  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  55  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  56  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  57  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  58  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  59  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  60  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  61  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  62  * POSSIBILITY OF SUCH DAMAGE.
  63  */
  64
  65 #if HAVE_NBTOOL_CONFIG_H
  66 #include "nbtool_config.h"
  67 #endif
  68
  69 #include <sys/cdefs.h>
  70 #if !defined(lint)
  71 #if 0
  72 static char sccsid[] = "@(#)ftree.c     8.2 (Berkeley) 4/18/94";
  73 #else
  74 __RCSID("$NetBSD: ftree.c,v 1.39 2008/04/28 20:22:51 martin Exp $");
  75 #endif
  76 #endif /* not lint */
  77
  78 #include <sys/types.h>
  79 #include <sys/time.h>
  80 #include <sys/stat.h>
  81 #include <sys/param.h>
  82 #include <ctype.h>
  83 #include <errno.h>
  84 #include <fts.h>
  85 #include <stdio.h>
  86 #include <stdlib.h>
  87 #include <string.h>
  88 #include <unistd.h>
  89 #include "pax.h"
  90 #include "ftree.h"
  91 #include "extern.h"
  92 #include "options.h"
  93 #ifndef SMALL
  94 #include "mtree.h"
  95 #endif  /* SMALL */
  96
  97 /*
  98  * routines to interface with the fts library function.
  99  *
 100  * file args supplied to pax are stored on a single linked list (of type FTREE)
 101  * and given to fts to be processed one at a time. pax "selects" files from
 102  * the expansion of each arg into the corresponding file tree (if the arg is a
 103  * directory, otherwise the node itself is just passed to pax). The selection
 104  * is modified by the -n and -u flags. The user is informed when a specific
 105  * file arg does not generate any selected files. -n keeps expanding the file
 106  * tree arg until one of its files is selected, then skips to the next file
 107  * arg. when the user does not supply the file trees as command line args to
 108  * pax, they are read from stdin
 109  */
 110
 111 static FTS *ftsp = NULL;                /* current FTS handle */
 112 static int ftsopts;                     /* options to be used on fts_open */
 113 static char *farray[2];                 /* array for passing each arg to fts */
 114 static FTREE *fthead = NULL;            /* head of linked list of file args */
 115 static FTREE *fttail = NULL;            /* tail of linked list of file args */
 116 static FTREE *ftcur = NULL;             /* current file arg being processed */
 117 static FTSENT *ftent = NULL;            /* current file tree entry */
 118 static int ftree_skip;                  /* when set skip to next file arg */
 119 #ifndef SMALL
 120 static NODE *ftnode = NULL;             /* mtree(8) specfile; used by -M */
 121 #endif  /* SMALL */
 122
 123 static int ftree_arg(void);
 124
 125 #define FTS_ERRNO(x)    (x)->fts_errno
 126
 127 /*
 128  * ftree_start()
 129  *      initialize the options passed to fts_open() during this run of pax
 130  *      options are based on the selection of pax options by the user
 131  *      fts_start() also calls fts_arg() to open the first valid file arg. We
 132  *      also attempt to reset directory access times when -t (tflag) is set.
 133  * Return:
 134  *      0 if there is at least one valid file arg to process, -1 otherwise
 135  */
 136
 137 int
 138 ftree_start()
 139 {
 140
 141 #ifndef SMALL
 142         /*
 143          * if -M is given, the list of filenames on stdin is actually
 144          * an mtree(8) specfile, so parse the specfile into a NODE *
 145          * tree at ftnode, for use by next_file()
 146          */
 147         if (Mflag) {
 148                 if (fthead != NULL) {
 149                         tty_warn(1,
 150             "The -M flag is only supported when reading file list from stdin");
 151                         return -1;
 152                 }
 153                 ftnode = spec(stdin);
 154                 if (ftnode != NULL &&
 155                     (ftnode->type != F_DIR || strcmp(ftnode->name, ".") != 0)) {
 156                         tty_warn(1,
 157                             "First node of specfile is not `.' directory");
 158                         return -1;
 159                 }
 160                 return 0;
 161         }
 162 #endif  /* SMALL */
 163
 164         /*
 165          * set up the operation mode of fts, open the first file arg. We must
 166          * use FTS_NOCHDIR, as the user may have to open multiple archives and
 167          * if fts did a chdir off into the boondocks, we may create an archive
 168          * volume in an place where the user did not expect to.
 169          */
 170         ftsopts = FTS_NOCHDIR;
 171
 172         /*
 173          * optional user flags that effect file traversal
 174          * -H command line symlink follow only (half follow)
 175          * -L follow sylinks (logical)
 176          * -P do not follow sylinks (physical). This is the default.
 177          * -X do not cross over mount points
 178          * -t preserve access times on files read.
 179          * -n select only the first member of a file tree when a match is found
 180          * -d do not extract subtrees rooted at a directory arg.
 181          */
 182         if (Lflag)
 183                 ftsopts |= FTS_LOGICAL;
 184         else
 185                 ftsopts |= FTS_PHYSICAL;
 186         if (Hflag)
 187                 ftsopts |= FTS_COMFOLLOW;
 188         if (Xflag)
 189                 ftsopts |= FTS_XDEV;
 190
 191         if ((fthead == NULL) && ((farray[0] = malloc(PAXPATHLEN+2)) == NULL)) {
 192                 tty_warn(1, "Unable to allocate memory for file name buffer");
 193                 return -1;
 194         }
 195
 196         if (ftree_arg() < 0)
 197                 return -1;
 198         if (tflag && (atdir_start() < 0))
 199                 return -1;
 200         return 0;
 201 }
 202
 203 /*
 204  * ftree_add()
 205  *      add the arg to the linked list of files to process. Each will be
 206  *      processed by fts one at a time
 207  * Return:
 208  *      0 if added to the linked list, -1 if failed
 209  */
 210
 211 int
 212 ftree_add(char *str, int isdir)
 213 {
 214         FTREE *ft;
 215         int len;
 216
 217         /*
 218          * simple check for bad args
 219          */
 220         if ((str == NULL) || (*str == '\0')) {
 221                 tty_warn(0, "Invalid file name argument");
 222                 return -1;
 223         }
 224
 225         /*
 226          * allocate FTREE node and add to the end of the linked list (args are
 227          * processed in the same order they were passed to pax). Get rid of any
 228          * trailing / the user may pass us. (watch out for / by itself).
 229          */
 230         if ((ft = (FTREE *)malloc(sizeof(FTREE))) == NULL) {
 231                 tty_warn(0, "Unable to allocate memory for filename");
 232                 return -1;
 233         }
 234
 235         if (((len = strlen(str) - 1) > 0) && (str[len] == '/'))
 236                 str[len] = '\0';
 237         ft->fname = str;
 238         ft->refcnt = -isdir;
 239         ft->fow = NULL;
 240         if (fthead == NULL) {
 241                 fttail = fthead = ft;
 242                 return 0;
 243         }
 244         fttail->fow = ft;
 245         fttail = ft;
 246         return 0;
 247 }
 248
 249 /*
 250  * ftree_sel()
 251  *      this entry has been selected by pax. bump up reference count and handle
 252  *      -n and -d processing.
 253  */
 254
 255 void
 256 ftree_sel(ARCHD *arcn)
 257 {
 258         /*
 259          * set reference bit for this pattern. This linked list is only used
 260          * when file trees are supplied pax as args. The list is not used when
 261          * the trees are read from stdin.
 262          */
 263         if (ftcur != NULL)
 264                 ftcur->refcnt = 1;
 265
 266         /*
 267          * if -n we are done with this arg, force a skip to the next arg when
 268          * pax asks for the next file in next_file().
 269          * if -M we don't use fts(3), so the rest of this function is moot.
 270          * if -d we tell fts only to match the directory (if the arg is a dir)
 271          * and not the entire file tree rooted at that point.
 272          */
 273         if (nflag)
 274                 ftree_skip = 1;
 275
 276         if (Mflag || !dflag || (arcn->type != PAX_DIR))
 277                 return;
 278
 279         if (ftent != NULL)
 280                 (void)fts_set(ftsp, ftent, FTS_SKIP);
 281 }
 282
 283 /*
 284  * ftree_chk()
 285  *      called at end on pax execution. Prints all those file args that did not
 286  *      have a selected member (reference count still 0)
 287  */
 288
 289 void
 290 ftree_chk(void)
 291 {
 292         FTREE *ft;
 293         int wban = 0;
 294
 295         /*
 296          * make sure all dir access times were reset.
 297          */
 298         if (tflag)
 299                 atdir_end();
 300
 301         /*
 302          * walk down list and check reference count. Print out those members
 303          * that never had a match
 304          */
 305         for (ft = fthead; ft != NULL; ft = ft->fow) {
 306                 if (ft->refcnt != 0)
 307                         continue;
 308                 if (wban == 0) {
 309                         tty_warn(1,
 310                             "WARNING! These file names were not selected:");
 311                         ++wban;
 312                 }
 313                 (void)fprintf(stderr, "%s\n", ft->fname);
 314         }
 315 }
 316
 317 /*
 318  * ftree_arg()
 319  *      Get the next file arg for fts to process. Can be from either the linked
 320  *      list or read from stdin when the user did not them as args to pax. Each
 321  *      arg is processed until the first successful fts_open().
 322  * Return:
 323  *      0 when the next arg is ready to go, -1 if out of file args (or EOF on
 324  *      stdin).
 325  */
 326
 327 static int
 328 ftree_arg(void)
 329 {
 330         /*
 331          * close off the current file tree
 332          */
 333         if (ftsp != NULL) {
 334                 (void)fts_close(ftsp);
 335                 ftsp = NULL;
 336                 ftent = NULL;
 337         }
 338
 339         /*
 340          * keep looping until we get a valid file tree to process. Stop when we
 341          * reach the end of the list (or get an eof on stdin)
 342          */
 343         for(;;) {
 344                 if (fthead == NULL) {
 345                         int i, c = EOF;
 346                         /*
 347                          * the user didn't supply any args, get the file trees
 348                          * to process from stdin;
 349                          */
 350                         for (i = 0; i < PAXPATHLEN + 2; i++) {
 351                                 c = getchar();
 352                                 if (c == EOF)
 353                                         break;
 354                                 else if (c == sep) {
 355                                         if (i != 0)
 356                                                 break;
 357                                 } else
 358                                         farray[0][i] = c;
 359                         }
 360                         if (i == 0)
 361                                 return -1;
 362                         farray[0][i] = '\0';
 363                 } else {
 364                         /*
 365                          * the user supplied the file args as arguments to pax
 366                          */
 367                         if (ftcur == NULL)
 368                                 ftcur = fthead;
 369                         else if ((ftcur = ftcur->fow) == NULL)
 370                                 return -1;
 371
 372                         if (ftcur->refcnt < 0) {
 373                                 /*
 374                                  * chdir entry.
 375                                  * Change directory and retry loop.
 376                                  */
 377                                 if (ar_dochdir(ftcur->fname))
 378                                         return (-1);
 379                                 continue;
 380                         }
 381                         farray[0] = ftcur->fname;
 382                 }
 383
 384                 /*
 385                  * watch it, fts wants the file arg stored in a array of char
 386                  * ptrs, with the last one a null. we use a two element array
 387                  * and set farray[0] to point at the buffer with the file name
 388                  * in it. We cannot pass all the file args to fts at one shot
 389                  * as we need to keep a handle on which file arg generates what
 390                  * files (the -n and -d flags need this). If the open is
 391                  * successful, return a 0.
 392                  */
 393                 if ((ftsp = fts_open(farray, ftsopts, NULL)) != NULL)
 394                         break;
 395         }
 396         return 0;
 397 }
 398
 399 /*
 400  * next_file()
 401  *      supplies the next file to process in the supplied archd structure.
 402  * Return:
 403  *      0 when contents of arcn have been set with the next file, -1 when done.
 404  */
 405
 406 int
 407 next_file(ARCHD *arcn)
 408 {
 409 #ifndef SMALL
 410         static  char    curdir[PAXPATHLEN+2], curpath[PAXPATHLEN+2];
 411         static  int     curdirlen;
 412
 413         struct stat     statbuf;
 414         FTSENT          Mftent;
 415 #endif  /* SMALL */
 416         int             cnt;
 417         time_t          atime, mtime;
 418         char            *curlink;
 419 #define MFTENT_DUMMY_DEV        UINT_MAX
 420
 421         curlink = NULL;
 422 #ifndef SMALL
 423         /*
 424          * if parsing an mtree(8) specfile, build up `dummy' ftsent
 425          * from specfile info, and jump below to complete setup of arcn.
 426          */
 427         if (Mflag) {
 428                 int     skipoptional;
 429
 430  next_ftnode:
 431                 skipoptional = 0;
 432                 if (ftnode == NULL)             /* tree is empty */
 433                         return (-1);
 434
 435                                                 /* get current name */
 436                 if (snprintf(curpath, sizeof(curpath), "%s%s%s",
 437                     curdir, curdirlen ? "/" : "", ftnode->name)
 438                     >= (int)sizeof(curpath)) {
 439                         tty_warn(1, "line %lu: %s: %s", (u_long)ftnode->lineno,
 440                             curdir, strerror(ENAMETOOLONG));
 441                         return (-1);
 442                 }
 443                 ftnode->flags |= F_VISIT;       /* mark node visited */
 444
 445                                                 /* construct dummy FTSENT */
 446                 Mftent.fts_path = curpath;
 447                 Mftent.fts_statp = &statbuf;
 448                 Mftent.fts_pointer = ftnode;
 449                 ftent = &Mftent;
 450                                                 /* look for existing file */
 451                 if (lstat(Mftent.fts_path, &statbuf) == -1) {
 452                         if (ftnode->flags & F_OPT)
 453                                 skipoptional = 1;
 454
 455                                                 /* missing: fake up stat info */
 456                         memset(&statbuf, 0, sizeof(statbuf));
 457                         statbuf.st_dev = MFTENT_DUMMY_DEV;
 458                         statbuf.st_ino = ftnode->lineno;
 459                         statbuf.st_size = 0;
 460 #define NODETEST(t, m)                                                  \
 461                         if (!(t)) {                                     \
 462                                 tty_warn(1, "line %lu: %s: %s not specified", \
 463                                     (u_long)ftnode->lineno,             \
 464                                     ftent->fts_path, m);                \
 465                                 return -1;                              \
 466                         }
 467                         statbuf.st_mode = nodetoino(ftnode->type);
 468                         NODETEST(ftnode->flags & F_TYPE, "type");
 469                         NODETEST(ftnode->flags & F_MODE, "mode");
 470                         if (!(ftnode->flags & F_TIME))
 471                                 statbuf.st_mtime = starttime;
 472                         NODETEST(ftnode->flags & (F_GID | F_GNAME), "group");
 473                         NODETEST(ftnode->flags & (F_UID | F_UNAME), "user");
 474                         if (ftnode->type == F_BLOCK || ftnode->type == F_CHAR)
 475                                 NODETEST(ftnode->flags & F_DEV,
 476                                     "device number");
 477                         if (ftnode->type == F_LINK)
 478                                 NODETEST(ftnode->flags & F_SLINK, "symlink");
 479                         /* don't require F_FLAGS or F_SIZE */
 480 #undef NODETEST
 481                 } else {
 482                         if (ftnode->flags & F_TYPE && nodetoino(ftnode->type)
 483                             != (statbuf.st_mode & S_IFMT)) {
 484                                 tty_warn(1,
 485                             "line %lu: %s: type mismatch: specfile %s, tree %s",
 486                                     (u_long)ftnode->lineno, ftent->fts_path,
 487                                     inotype(nodetoino(ftnode->type)),
 488                                     inotype(statbuf.st_mode));
 489                                 return -1;
 490                         }
 491                         if (ftnode->type == F_DIR && (ftnode->flags & F_OPT))
 492                                 skipoptional = 1;
 493                 }
 494                 /*
 495                  * override settings with those from specfile
 496                  */
 497                 if (ftnode->flags & F_MODE) {
 498                         statbuf.st_mode &= ~ALLPERMS;
 499                         statbuf.st_mode |= (ftnode->st_mode & ALLPERMS);
 500                 }
 501                 if (ftnode->flags & (F_GID | F_GNAME))
 502                         statbuf.st_gid = ftnode->st_gid;
 503                 if (ftnode->flags & (F_UID | F_UNAME))
 504                         statbuf.st_uid = ftnode->st_uid;
 505 #if HAVE_STRUCT_STAT_ST_FLAGS
 506                 if (ftnode->flags & F_FLAGS)
 507                         statbuf.st_flags = ftnode->st_flags;
 508 #endif
 509                 if (ftnode->flags & F_TIME)
 510 #if BSD4_4 && !HAVE_NBTOOL_CONFIG_H
 511                         statbuf.st_mtimespec = ftnode->st_mtimespec;
 512 #else
 513                         statbuf.st_mtime = ftnode->st_mtimespec.tv_sec;
 514 #endif
 515                 if (ftnode->flags & F_DEV)
 516                         statbuf.st_rdev = ftnode->st_rdev;
 517                 if (ftnode->flags & F_SLINK)
 518                         curlink = ftnode->slink;
 519                                 /* ignore F_SIZE */
 520
 521                 /*
 522                  * find next node
 523                  */
 524                 if (ftnode->type == F_DIR && ftnode->child != NULL) {
 525                                         /* directory with unseen child */
 526                         ftnode = ftnode->child;
 527                         curdirlen = strlcpy(curdir, curpath, sizeof(curdir));
 528                 } else do {
 529                         if (ftnode->next != NULL) {
 530                                         /* next node at current level */
 531                                 ftnode = ftnode->next;
 532                         } else {        /* move back to parent */
 533                                         /* reset time only on first cd.. */
 534                                 if (Mftent.fts_pointer == ftnode && tflag &&
 535                                     (get_atdir(MFTENT_DUMMY_DEV, ftnode->lineno,
 536                                     &mtime, &atime) == 0)) {
 537                                         set_ftime(ftent->fts_path,
 538                                             mtime, atime, 1, 0);
 539                                 }
 540                                 ftnode = ftnode->parent;
 541                                 if (ftnode->parent == ftnode)
 542                                         ftnode = NULL;
 543                                 else {
 544                                         curdirlen -= strlen(ftnode->name) + 1;
 545                                         curdir[curdirlen] = '\0';
 546                                 }
 547                         }
 548                 } while (ftnode != NULL && ftnode->flags & F_VISIT);
 549                 if (skipoptional)       /* skip optional entries */
 550                         goto next_ftnode;
 551                 goto got_ftent;
 552         }
 553 #endif  /* SMALL */
 554
 555         /*
 556          * ftree_sel() might have set the ftree_skip flag if the user has the
 557          * -n option and a file was selected from this file arg tree. (-n says
 558          * only one member is matched for each pattern) ftree_skip being 1
 559          * forces us to go to the next arg now.
 560          */
 561         if (ftree_skip) {
 562                 /*
 563                  * clear and go to next arg
 564                  */
 565                 ftree_skip = 0;
 566                 if (ftree_arg() < 0)
 567                         return -1;
 568         }
 569
 570         if (ftsp == NULL)
 571                 return -1;
 572         /*
 573          * loop until we get a valid file to process
 574          */
 575         for(;;) {
 576                 if ((ftent = fts_read(ftsp)) == NULL) {
 577                         /*
 578                          * out of files in this tree, go to next arg, if none
 579                          * we are done
 580                          */
 581                         if (ftree_arg() < 0)
 582                                 return -1;
 583                         continue;
 584                 }
 585
 586                 /*
 587                  * handle each type of fts_read() flag
 588                  */
 589                 switch(ftent->fts_info) {
 590                 case FTS_D:
 591                 case FTS_DEFAULT:
 592                 case FTS_F:
 593                 case FTS_SL:
 594                 case FTS_SLNONE:
 595                         /*
 596                          * these are all ok
 597                          */
 598                         break;
 599                 case FTS_DP:
 600                         /*
 601                          * already saw this directory. If the user wants file
 602                          * access times reset, we use this to restore the
 603                          * access time for this directory since this is the
 604                          * last time we will see it in this file subtree
 605                          * remember to force the time (this is -t on a read
 606                          * directory, not a created directory).
 607                          */
 608                         if (!tflag || (get_atdir(
 609                             ftent->fts_statp->st_dev, ftent->fts_statp->st_ino,
 610                             &mtime, &atime) < 0))
 611                                 continue;
 612                         set_ftime(ftent->fts_path, mtime, atime, 1, 0);
 613                         continue;
 614                 case FTS_DC:
 615                         /*
 616                          * fts claims a file system cycle
 617                          */
 618                         tty_warn(1,"File system cycle found at %s",
 619                             ftent->fts_path);
 620                         continue;
 621                 case FTS_DNR:
 622                         syswarn(1, FTS_ERRNO(ftent),
 623                             "Unable to read directory %s", ftent->fts_path);
 624                         continue;
 625                 case FTS_ERR:
 626                         syswarn(1, FTS_ERRNO(ftent),
 627                             "File system traversal error");
 628                         continue;
 629                 case FTS_NS:
 630                 case FTS_NSOK:
 631                         syswarn(1, FTS_ERRNO(ftent),
 632                             "Unable to access %s", ftent->fts_path);
 633                         continue;
 634                 }
 635
 636 #ifndef SMALL
 637  got_ftent:
 638 #endif  /* SMALL */
 639                 /*
 640                  * ok got a file tree node to process. copy info into arcn
 641                  * structure (initialize as required)
 642                  */
 643                 arcn->skip = 0;
 644                 arcn->pad = 0;
 645                 arcn->ln_nlen = 0;
 646                 arcn->ln_name[0] = '\0';
 647                 arcn->sb = *(ftent->fts_statp);
 648
 649                 /*
 650                  * file type based set up and copy into the arcn struct
 651                  * SIDE NOTE:
 652                  * we try to reset the access time on all files and directories
 653                  * we may read when the -t flag is specified. files are reset
 654                  * when we close them after copying. we reset the directories
 655                  * when we are done with their file tree (we also clean up at
 656                  * end in case we cut short a file tree traversal). However
 657                  * there is no way to reset access times on symlinks.
 658                  */
 659                 switch(S_IFMT & arcn->sb.st_mode) {
 660                 case S_IFDIR:
 661                         arcn->type = PAX_DIR;
 662                         if (!tflag)
 663                                 break;
 664                         add_atdir(ftent->fts_path, arcn->sb.st_dev,
 665                             arcn->sb.st_ino, arcn->sb.st_mtime,
 666                             arcn->sb.st_atime);
 667                         break;
 668                 case S_IFCHR:
 669                         arcn->type = PAX_CHR;
 670                         break;
 671                 case S_IFBLK:
 672                         arcn->type = PAX_BLK;
 673                         break;
 674                 case S_IFREG:
 675                         /*
 676                          * only regular files with have data to store on the
 677                          * archive. all others will store a zero length skip.
 678                          * the skip field is used by pax for actual data it has
 679                          * to read (or skip over).
 680                          */
 681                         arcn->type = PAX_REG;
 682                         arcn->skip = arcn->sb.st_size;
 683                         break;
 684                 case S_IFLNK:
 685                         arcn->type = PAX_SLK;
 686                         if (curlink != NULL) {
 687                                 cnt = strlcpy(arcn->ln_name, curlink,
 688                                     sizeof(arcn->ln_name));
 689                         /*
 690                          * have to read the symlink path from the file
 691                          */
 692                         } else if ((cnt =
 693                             readlink(ftent->fts_path, arcn->ln_name,
 694                             sizeof(arcn->ln_name) - 1)) < 0) {
 695                                 syswarn(1, errno, "Unable to read symlink %s",
 696                                     ftent->fts_path);
 697                                 continue;
 698                         }
 699                         /*
 700                          * set link name length, watch out readlink does not
 701                          * always null terminate the link path
 702                          */
 703                         arcn->ln_name[cnt] = '\0';
 704                         arcn->ln_nlen = cnt;
 705                         break;
 706 #ifdef S_IFSOCK
 707                 case S_IFSOCK:
 708                         /*
 709                          * under BSD storing a socket is senseless but we will
 710                          * let the format specific write function make the
 711                          * decision of what to do with it.
 712                          */
 713                         arcn->type = PAX_SCK;
 714                         break;
 715 #endif
 716                 case S_IFIFO:
 717                         arcn->type = PAX_FIF;
 718                         break;
 719                 }
 720                 break;
 721         }
 722
 723         /*
 724          * copy file name, set file name length
 725          */
 726         arcn->nlen = strlcpy(arcn->name, ftent->fts_path, sizeof(arcn->name));
 727         arcn->org_name = arcn->fts_name;
 728         strlcpy(arcn->fts_name, ftent->fts_path, sizeof arcn->fts_name);
 729         if (strcmp(NM_CPIO, argv0) == 0) {
 730                 /*
 731                  * cpio does *not* descend directories listed in the
 732                  * arguments, unlike pax/tar, so needs special handling
 733                  * here.  failure to do so results in massive amounts
 734                  * of duplicated files in the output. We kill fts after
 735                  * the first name is extracted, what a waste.
 736                  */
 737                 ftcur->refcnt = 1;
 738                 (void)ftree_arg();
 739         }
 740         return 0;
 741 }