tar.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * Mini tar implementation for busybox
   4  *
   5  * Note, that as of BusyBox-0.43, tar has been completely rewritten from the
   6  * ground up.  It still has remnents of the old code lying about, but it is
   7  * very different now (i.e. cleaner, less global variables, etc)
   8  *
   9  * Copyright (C) 2000 by Lineo, inc.
  10  * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
  11  *
  12  * Based in part in the tar implementation in sash
  13  *  Copyright (c) 1999 by David I. Bell
  14  *  Permission is granted to use, distribute, or modify this source,
  15  *  provided that this copyright notice remains intact.
  16  *  Permission to distribute sash derived code under the GPL has been granted.
  17  *
  18  * Based in part on the tar implementation from busybox-0.28
  19  *  Copyright (C) 1995 Bruce Perens
  20  *  This is free software under the GNU General Public License.
  21  *
  22  * This program is free software; you can redistribute it and/or modify
  23  * it under the terms of the GNU General Public License as published by
  24  * the Free Software Foundation; either version 2 of the License, or
  25  * (at your option) any later version.
  26  *
  27  * This program is distributed in the hope that it will be useful,
  28  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  29  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  30  * General Public License for more details.
  31  *
  32  * You should have received a copy of the GNU General Public License
  33  * along with this program; if not, write to the Free Software
  34  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  35  *
  36  */
  37
  38
  39 #include "busybox.h"
  40 #define BB_DECLARE_EXTERN
  41 #define bb_need_io_error
  42 #define bb_need_name_longer_than_foo
  43 #include "messages.c"
  44 #include <stdio.h>
  45 #include <dirent.h>
  46 #include <errno.h>
  47 #include <fcntl.h>
  48 #include <signal.h>
  49 #include <time.h>
  50 #include <utime.h>
  51 #include <sys/types.h>
  52 #include <sys/sysmacros.h>
  53 #include <getopt.h>
  54
  55 #ifdef BB_FEATURE_TAR_GZIP
  56 extern int unzip(int in, int out);
  57 extern int gunzip_init();
  58 #endif
  59
  60 /* Tar file constants  */
  61 #ifndef MAJOR
  62 #define MAJOR(dev) (((dev)>>8)&0xff)
  63 #define MINOR(dev) ((dev)&0xff)
  64 #endif
  65
  66 #define NAME_SIZE       100
  67
  68 /* POSIX tar Header Block, from POSIX 1003.1-1990  */
  69 struct TarHeader
  70 {
  71                                 /* byte offset */
  72         char name[NAME_SIZE];         /*   0-99 */
  73         char mode[8];                 /* 100-107 */
  74         char uid[8];                  /* 108-115 */
  75         char gid[8];                  /* 116-123 */
  76         char size[12];                /* 124-135 */
  77         char mtime[12];               /* 136-147 */
  78         char chksum[8];               /* 148-155 */
  79         char typeflag;                /* 156-156 */
  80         char linkname[NAME_SIZE];     /* 157-256 */
  81         char magic[6];                /* 257-262 */
  82         char version[2];              /* 263-264 */
  83         char uname[32];               /* 265-296 */
  84         char gname[32];               /* 297-328 */
  85         char devmajor[8];             /* 329-336 */
  86         char devminor[8];             /* 337-344 */
  87         char prefix[155];             /* 345-499 */
  88         char padding[12];             /* 500-512 (pad to exactly the TAR_BLOCK_SIZE) */
  89 };
  90 typedef struct TarHeader TarHeader;
  91
  92
  93 /* A few useful constants */
  94 #define TAR_MAGIC          "ustar"        /* ustar and a null */
  95 #define TAR_VERSION        "  "           /* Be compatable with GNU tar format */
  96 #define TAR_MAGIC_LEN       6
  97 #define TAR_VERSION_LEN     2
  98 #define TAR_BLOCK_SIZE      512
  99
 100 /* A nice enum with all the possible tar file content types */
 101 enum TarFileType
 102 {
 103         REGTYPE  = '0',            /* regular file */
 104         REGTYPE0 = '\0',           /* regular file (ancient bug compat)*/
 105         LNKTYPE  = '1',            /* hard link */
 106         SYMTYPE  = '2',            /* symbolic link */
 107         CHRTYPE  = '3',            /* character special */
 108         BLKTYPE  = '4',            /* block special */
 109         DIRTYPE  = '5',            /* directory */
 110         FIFOTYPE = '6',            /* FIFO special */
 111         CONTTYPE = '7',            /* reserved */
 112         GNULONGLINK = 'K',         /* GNU long (>100 chars) link name */
 113         GNULONGNAME = 'L',         /* GNU long (>100 chars) file name */
 114 };
 115 typedef enum TarFileType TarFileType;
 116
 117 /* This struct ignores magic, non-numeric user name,
 118  * non-numeric group name, and the checksum, since
 119  * these are all ignored by BusyBox tar. */
 120 struct TarInfo
 121 {
 122         int              tarFd;          /* An open file descriptor for reading from the tarball */
 123         char *           name;           /* File name */
 124         mode_t           mode;           /* Unix mode, including device bits. */
 125         uid_t            uid;            /* Numeric UID */
 126         gid_t            gid;            /* Numeric GID */
 127         size_t           size;           /* Size of file */
 128         time_t           mtime;          /* Last-modified time */
 129         enum TarFileType type;           /* Regular, directory, link, etc */
 130         char *           linkname;       /* Name for symbolic and hard links */
 131         long             devmajor;       /* Major number for special device */
 132         long             devminor;       /* Minor number for special device */
 133 };
 134 typedef struct TarInfo TarInfo;
 135
 136 /* Local procedures to restore files from a tar file.  */
 137 static int readTarFile(int tarFd, int extractFlag, int listFlag,
 138                 int tostdoutFlag, int verboseFlag, char** extractList,
 139                 char** excludeList);
 140
 141 #ifdef BB_FEATURE_TAR_CREATE
 142 /* Local procedures to save files into a tar file.  */
 143 static int writeTarFile(const char* tarName, int verboseFlag, char **argv,
 144                 char** excludeList);
 145 #endif
 146
 147 #ifdef BB_FEATURE_TAR_GZIP
 148 /* Signal handler for when child gzip process dies...  */
 149 void child_died()
 150 {
 151         fflush(stdout);
 152         fflush(stderr);
 153         exit(EXIT_FAILURE);
 154 }
 155
 156 static int tar_unzip_init(int tarFd)
 157 {
 158         int child_pid;
 159         static int unzip_pipe[2];
 160         /* Cope if child dies... Otherwise we block forever in read()... */
 161         signal(SIGCHLD, child_died);
 162
 163         if (pipe(unzip_pipe)!=0)
 164                 error_msg_and_die("pipe error\n");
 165
 166         if ( (child_pid = fork()) == -1)
 167                 error_msg_and_die("fork failure\n");
 168
 169         if (child_pid==0) {
 170                 /* child process */
 171                 gunzip_init();
 172                 unzip(tarFd, unzip_pipe[1]);
 173                 exit(EXIT_SUCCESS);
 174         }
 175         else
 176                 /* return fd of uncompressed data to parent process */
 177                 return(unzip_pipe[0]);
 178 }
 179 #endif
 180
 181 extern int tar_main(int argc, char **argv)
 182 {
 183         char** excludeList=NULL;
 184         char** extractList=NULL;
 185         const char *tarName="-";
 186 #if defined BB_FEATURE_TAR_EXCLUDE
 187         int excludeListSize=0;
 188         char *excludeFileName ="-";
 189         FILE *fileList;
 190         char file[256];
 191 #endif
 192 #if defined BB_FEATURE_TAR_GZIP
 193         int unzipFlag    = FALSE;
 194 #endif
 195         int listFlag     = FALSE;
 196         int extractFlag  = FALSE;
 197         int createFlag   = FALSE;
 198         int verboseFlag  = FALSE;
 199         int tostdoutFlag = FALSE;
 200         int status       = FALSE;
 201         int firstOpt     = TRUE;
 202         int stopIt;
 203
 204         if (argc <= 1)
 205                 usage(tar_usage);
 206
 207         while (*(++argv) && (**argv == '-' || firstOpt == TRUE)) {
 208                 firstOpt=FALSE;
 209                 stopIt=FALSE;
 210                 while (stopIt==FALSE && **argv) {
 211                         switch (*((*argv)++)) {
 212                                 case 'c':
 213                                         if (extractFlag == TRUE || listFlag == TRUE)
 214                                                 goto flagError;
 215                                         createFlag = TRUE;
 216                                         break;
 217                                 case 'x':
 218                                         if (listFlag == TRUE || createFlag == TRUE)
 219                                                 goto flagError;
 220                                         extractFlag = TRUE;
 221                                         break;
 222                                 case 't':
 223                                         if (extractFlag == TRUE || createFlag == TRUE)
 224                                                 goto flagError;
 225                                         listFlag = TRUE;
 226                                         break;
 227 #ifdef BB_FEATURE_TAR_GZIP
 228                                 case 'z':
 229                                         unzipFlag = TRUE;
 230                                         break;
 231 #endif
 232                                 case 'v':
 233                                         verboseFlag = TRUE;
 234                                         break;
 235                                 case 'O':
 236                                         tostdoutFlag = TRUE;
 237                                         break;
 238                                 case 'f':
 239                                         if (*tarName != '-')
 240                                                 error_msg_and_die( "Only one 'f' option allowed\n");
 241                                         tarName = *(++argv);
 242                                         if (tarName == NULL)
 243                                                 error_msg_and_die( "Option requires an argument: No file specified\n");
 244                                         stopIt=TRUE;
 245                                         break;
 246 #if defined BB_FEATURE_TAR_EXCLUDE
 247                                 case 'e':
 248                                         if (strcmp(*argv, "xclude")==0) {
 249                                                 excludeList=xrealloc( excludeList, sizeof(char**) * (excludeListSize+2));
 250                                                 excludeList[excludeListSize] = *(++argv);
 251                                                 if (excludeList[excludeListSize] == NULL)
 252                                                         error_msg_and_die( "Option requires an argument: No file specified\n");
 253                                                 /* Remove leading "/"s */
 254                                                 if (*excludeList[excludeListSize] =='/')
 255                                                         excludeList[excludeListSize] = (excludeList[excludeListSize])+1;
 256                                                 /* Tack a NULL onto the end of the list */
 257                                                 excludeList[++excludeListSize] = NULL;
 258                                                 stopIt=TRUE;
 259                                                 break;
 260                                         }
 261                                 case 'X':
 262                                        if (*excludeFileName != '-')
 263                                                error_msg_and_die("Only one 'X' option allowed\n");
 264                                        excludeFileName = *(++argv);
 265                                        if  (excludeFileName == NULL)
 266                                                error_msg_and_die("Option requires an argument: No file specified\n");
 267                                        fileList = fopen (excludeFileName, "rt");
 268                                        if (! fileList)
 269                                                error_msg_and_die("Exclude file: file not found\n");
 270                                        while (!feof(fileList)) {
 271                                                fscanf(fileList, "%s", file);
 272                                                excludeList=xrealloc( excludeList, sizeof(char**) * (excludeListSize+2));
 273                                                excludeList[excludeListSize] = malloc(sizeof(char) * (strlen(file)+1));
 274                                                strcpy(excludeList[excludeListSize],file);
 275                                                /* Remove leading "/"s */
 276                                                if (*excludeList[excludeListSize] == '/')
 277                                                        excludeList[excludeListSize] = (excludeList[excludeListSize])+1;
 278                                                /* Tack a NULL onto the end of the list */
 279                                                        excludeList[++excludeListSize] = NULL;
 280                                        }
 281
 282                                        fclose(fileList);
 283                                        stopIt=TRUE;
 284                                        break;
 285 #endif
 286                                 case '-':
 287                                                 break;
 288                                 default:
 289                                         usage(tar_usage);
 290                         }
 291                 }
 292         }
 293
 294         /*
 295          * Do the correct type of action supplying the rest of the
 296          * command line arguments as the list of files to process.
 297          */
 298         if (createFlag == TRUE) {
 299 #ifndef BB_FEATURE_TAR_CREATE
 300                 error_msg_and_die( "This version of tar was not compiled with tar creation support.\n");
 301 #else
 302 #ifdef BB_FEATURE_TAR_GZIP
 303                 if (unzipFlag==TRUE)
 304                         error_msg_and_die("Creation of compressed not internally support by tar, pipe to busybox gunzip\n");
 305 #endif
 306                 status = writeTarFile(tarName, verboseFlag, argv, excludeList);
 307 #endif
 308         }
 309         if (listFlag == TRUE || extractFlag == TRUE) {
 310                 int tarFd;
 311                 if (*argv)
 312                         extractList = argv;
 313                 /* Open the tar file for reading.  */
 314                 if (!strcmp(tarName, "-"))
 315                         tarFd = fileno(stdin);
 316                 else
 317                         tarFd = open(tarName, O_RDONLY);
 318                 if (tarFd < 0)
 319                         error_msg_and_die( "Error opening '%s': %s\n", tarName, strerror(errno));
 320
 321 #ifdef BB_FEATURE_TAR_GZIP
 322                 /* unzip tarFd in a seperate process */
 323                 if (unzipFlag == TRUE)
 324                         tarFd = tar_unzip_init(tarFd);
 325 #endif
 326                 status = readTarFile(tarFd, extractFlag, listFlag, tostdoutFlag,
 327                                         verboseFlag, extractList, excludeList);
 328         }
 329
 330         if (status == TRUE)
 331                 return EXIT_SUCCESS;
 332         else
 333                 return EXIT_FAILURE;
 334
 335   flagError:
 336         error_msg_and_die( "Exactly one of 'c', 'x' or 't' must be specified\n");
 337 }
 338
 339 static void
 340 fixUpPermissions(TarInfo *header)
 341 {
 342         struct utimbuf t;
 343         /* Now set permissions etc for the new file */
 344         chown(header->name, header->uid, header->gid);
 345         chmod(header->name, header->mode);
 346         /* Reset the time */
 347         t.actime = time(0);
 348         t.modtime = header->mtime;
 349         utime(header->name, &t);
 350 }
 351
 352 static int
 353 tarExtractRegularFile(TarInfo *header, int extractFlag, int tostdoutFlag)
 354 {
 355         size_t  writeSize;
 356         size_t  readSize;
 357         size_t  actualWriteSz;
 358         char    buffer[BUFSIZ];
 359         size_t  size = header->size;
 360         int outFd=fileno(stdout);
 361
 362         /* Open the file to be written, if a file is supposed to be written */
 363         if (extractFlag==TRUE && tostdoutFlag==FALSE) {
 364                 /* Create the path to the file, just in case it isn't there...
 365                  * This should not screw up path permissions or anything. */
 366                 create_path(header->name, 0777);
 367                 if ((outFd=open(header->name, O_CREAT|O_TRUNC|O_WRONLY,
 368                                                 header->mode & ~S_IFMT)) < 0) {
 369                         error_msg(io_error, header->name, strerror(errno));
 370                         return( FALSE);
 371                 }
 372         }
 373
 374         /* Write out the file, if we are supposed to be doing that */
 375         while ( size > 0 ) {
 376                 actualWriteSz=0;
 377                 if ( size > sizeof(buffer) )
 378                         writeSize = readSize = sizeof(buffer);
 379                 else {
 380                         int mod = size % 512;
 381                         if ( mod != 0 )
 382                                 readSize = size + (512 - mod);
 383                         else
 384                                 readSize = size;
 385                         writeSize = size;
 386                 }
 387                 if ( (readSize = full_read(header->tarFd, buffer, readSize)) <= 0 ) {
 388                         /* Tarball seems to have a problem */
 389                         error_msg("Unexpected EOF in archive\n");
 390                         return( FALSE);
 391                 }
 392                 if ( readSize < writeSize )
 393                         writeSize = readSize;
 394
 395                 /* Write out the file, if we are supposed to be doing that */
 396                 if (extractFlag==TRUE) {
 397
 398                         if ((actualWriteSz=full_write(outFd, buffer, writeSize)) != writeSize ) {
 399                                 /* Output file seems to have a problem */
 400                                 error_msg(io_error, header->name, strerror(errno));
 401                                 return( FALSE);
 402                         }
 403                 } else {
 404                         actualWriteSz=writeSize;
 405                 }
 406
 407                 size -= actualWriteSz;
 408         }
 409
 410         /* Now we are done writing the file out, so try
 411          * and fix up the permissions and whatnot */
 412         if (extractFlag==TRUE && tostdoutFlag==FALSE) {
 413                 close(outFd);
 414                 fixUpPermissions(header);
 415         }
 416         return( TRUE);
 417 }
 418
 419 static int
 420 tarExtractDirectory(TarInfo *header, int extractFlag, int tostdoutFlag)
 421 {
 422
 423         if (extractFlag==FALSE || tostdoutFlag==TRUE)
 424                 return( TRUE);
 425
 426         if (create_path(header->name, header->mode) != TRUE) {
 427                 error_msg("%s: Cannot mkdir: %s\n",
 428                                 header->name, strerror(errno));
 429                 return( FALSE);
 430         }
 431         /* make the final component, just in case it was
 432          * omitted by create_path() (which will skip the
 433          * directory if it doesn't have a terminating '/') */
 434         if (mkdir(header->name, header->mode) == 0) {
 435                 fixUpPermissions(header);
 436         }
 437         return( TRUE);
 438 }
 439
 440 static int
 441 tarExtractHardLink(TarInfo *header, int extractFlag, int tostdoutFlag)
 442 {
 443         if (extractFlag==FALSE || tostdoutFlag==TRUE)
 444                 return( TRUE);
 445
 446         if (link(header->linkname, header->name) < 0) {
 447                 error_msg("%s: Cannot create hard link to '%s': %s\n",
 448                                 header->name, header->linkname, strerror(errno));
 449                 return( FALSE);
 450         }
 451
 452         /* Now set permissions etc for the new directory */
 453         fixUpPermissions(header);
 454         return( TRUE);
 455 }
 456
 457 static int
 458 tarExtractSymLink(TarInfo *header, int extractFlag, int tostdoutFlag)
 459 {
 460         if (extractFlag==FALSE || tostdoutFlag==TRUE)
 461                 return( TRUE);
 462
 463 #ifdef  S_ISLNK
 464         if (symlink(header->linkname, header->name) < 0) {
 465                 error_msg("%s: Cannot create symlink to '%s': %s\n",
 466                                 header->name, header->linkname, strerror(errno));
 467                 return( FALSE);
 468         }
 469         /* Try to change ownership of the symlink.
 470          * If libs doesn't support that, don't bother.
 471          * Changing the pointed-to-file is the Wrong Thing(tm).
 472          */
 473 #if (__GLIBC__ >= 2) && (__GLIBC_MINOR__ >= 1)
 474         lchown(header->name, header->uid, header->gid);
 475 #endif
 476
 477         /* Do not change permissions or date on symlink,
 478          * since it changes the pointed to file instead.  duh. */
 479 #else
 480         error_msg("%s: Cannot create symlink to '%s': %s\n",
 481                         header->name, header->linkname,
 482                         "symlinks not supported");
 483 #endif
 484         return( TRUE);
 485 }
 486
 487 static int
 488 tarExtractSpecial(TarInfo *header, int extractFlag, int tostdoutFlag)
 489 {
 490         if (extractFlag==FALSE || tostdoutFlag==TRUE)
 491                 return( TRUE);
 492
 493         if (S_ISCHR(header->mode) || S_ISBLK(header->mode) || S_ISSOCK(header->mode)) {
 494                 if (mknod(header->name, header->mode, makedev(header->devmajor, header->devminor)) < 0) {
 495                         error_msg("%s: Cannot mknod: %s\n",
 496                                 header->name, strerror(errno));
 497                         return( FALSE);
 498                 }
 499         } else if (S_ISFIFO(header->mode)) {
 500                 if (mkfifo(header->name, header->mode) < 0) {
 501                         error_msg("%s: Cannot mkfifo: %s\n",
 502                                 header->name, strerror(errno));
 503                         return( FALSE);
 504                 }
 505         }
 506
 507         /* Now set permissions etc for the new directory */
 508         fixUpPermissions(header);
 509         return( TRUE);
 510 }
 511
 512 /* Read an octal value in a field of the specified width, with optional
 513  * spaces on both sides of the number and with an optional null character
 514  * at the end.  Returns -1 on an illegal format.  */
 515 static long getOctal(const char *cp, int size)
 516 {
 517         long val = 0;
 518
 519         for(;(size > 0) && (*cp == ' '); cp++, size--);
 520         if ((size == 0) || !is_octal(*cp))
 521                 return -1;
 522         for(; (size > 0) && is_octal(*cp); size--) {
 523                 val = val * 8 + *cp++ - '0';
 524         }
 525         for (;(size > 0) && (*cp == ' '); cp++, size--);
 526         if ((size > 0) && *cp)
 527                 return -1;
 528         return val;
 529 }
 530
 531
 532 /* Parse the tar header and fill in the nice struct with the details */
 533 static int
 534 readTarHeader(struct TarHeader *rawHeader, struct TarInfo *header)
 535 {
 536         int i;
 537         long chksum, sum=0;
 538         unsigned char *s = (unsigned char *)rawHeader;
 539
 540         header->name  = rawHeader->name;
 541         /* Check for and relativify any absolute paths */
 542         if ( *(header->name) == '/' ) {
 543                 static int alreadyWarned=FALSE;
 544
 545                 while (*(header->name) == '/')
 546                         ++*(header->name);
 547
 548                 if (alreadyWarned == FALSE) {
 549                         error_msg("Removing leading '/' from member names\n");
 550                         alreadyWarned = TRUE;
 551                 }
 552         }
 553
 554         header->mode  = getOctal(rawHeader->mode, sizeof(rawHeader->mode));
 555         header->uid   =  getOctal(rawHeader->uid, sizeof(rawHeader->uid));
 556         header->gid   =  getOctal(rawHeader->gid, sizeof(rawHeader->gid));
 557         header->size  = getOctal(rawHeader->size, sizeof(rawHeader->size));
 558         header->mtime = getOctal(rawHeader->mtime, sizeof(rawHeader->mtime));
 559         chksum = getOctal(rawHeader->chksum, sizeof(rawHeader->chksum));
 560         header->type  = rawHeader->typeflag;
 561         header->linkname  = rawHeader->linkname;
 562         header->devmajor  = getOctal(rawHeader->devmajor, sizeof(rawHeader->devmajor));
 563         header->devminor  = getOctal(rawHeader->devminor, sizeof(rawHeader->devminor));
 564
 565         /* Check the checksum */
 566         for (i = sizeof(*rawHeader); i-- != 0;) {
 567                 sum += *s++;
 568         }
 569         /* Remove the effects of the checksum field (replace
 570          * with blanks for the purposes of the checksum) */
 571         s = rawHeader->chksum;
 572         for (i = sizeof(rawHeader->chksum) ; i-- != 0;) {
 573                 sum -= *s++;
 574         }
 575         sum += ' ' * sizeof(rawHeader->chksum);
 576         if (sum == chksum )
 577                 return ( TRUE);
 578         return( FALSE);
 579 }
 580
 581
 582 /*
 583  * Read a tar file and extract or list the specified files within it.
 584  * If the list is empty than all files are extracted or listed.
 585  */
 586 extern int readTarFile(int tarFd, int extractFlag, int listFlag,
 587                 int tostdoutFlag, int verboseFlag, char** extractList,
 588                 char** excludeList)
 589 {
 590         int status;
 591         int errorFlag=FALSE;
 592         int skipNextHeaderFlag=FALSE;
 593         TarHeader rawHeader;
 594         TarInfo header;
 595         char** tmpList;
 596
 597         /* Set the umask for this process so it doesn't
 598          * screw up permission setting for us later. */
 599         umask(0);
 600
 601         /* Read the tar file, and iterate over it one file at a time */
 602         while ( (status = full_read(tarFd, (char*)&rawHeader, TAR_BLOCK_SIZE)) == TAR_BLOCK_SIZE ) {
 603
 604                 /* Try to read the header */
 605                 if ( readTarHeader(&rawHeader, &header) == FALSE ) {
 606                         if ( *(header.name) == '\0' ) {
 607                                 goto endgame;
 608                         } else {
 609                                 errorFlag=TRUE;
 610                                 error_msg("Bad tar header, skipping\n");
 611                                 continue;
 612                         }
 613                 }
 614                 if ( *(header.name) == '\0' )
 615                                 goto endgame;
 616                 header.tarFd = tarFd;
 617
 618                 /* Skip funky extra GNU headers that precede long files */
 619                 if ( (header.type == GNULONGNAME) || (header.type == GNULONGLINK) ) {
 620                         skipNextHeaderFlag=TRUE;
 621                         if (tarExtractRegularFile(&header, FALSE, FALSE) == FALSE)
 622                                 errorFlag = TRUE;
 623                         continue;
 624                 }
 625                 if ( skipNextHeaderFlag == TRUE ) {
 626                         skipNextHeaderFlag=FALSE;
 627                         error_msg(name_longer_than_foo, NAME_SIZE);
 628                         if (tarExtractRegularFile(&header, FALSE, FALSE) == FALSE)
 629                                 errorFlag = TRUE;
 630                         continue;
 631                 }
 632
 633 #if defined BB_FEATURE_TAR_EXCLUDE
 634                 {
 635                         int skipFlag=FALSE;
 636                         /* Check for excluded files....  */
 637                         for (tmpList=excludeList; tmpList && *tmpList; tmpList++) {
 638                                 /* Do some extra hoop jumping for when directory names
 639                                  * end in '/' but the entry in tmpList doesn't */
 640                                 if (strncmp( *tmpList, header.name, strlen(*tmpList))==0 || (
 641                                                         header.name[strlen(header.name)-1]=='/'
 642                                                         && strncmp( *tmpList, header.name,
 643                                                                 MIN(strlen(header.name)-1, strlen(*tmpList)))==0)) {
 644                                         /* If it is a regular file, pretend to extract it with
 645                                          * the extractFlag set to FALSE, so the junk in the tarball
 646                                          * is properly skipped over */
 647                                         if ( header.type==REGTYPE || header.type==REGTYPE0 ) {
 648                                                 if (tarExtractRegularFile(&header, FALSE, FALSE) == FALSE)
 649                                                         errorFlag = TRUE;
 650                                         }
 651                                         skipFlag=TRUE;
 652                                         break;
 653                                 }
 654                         }
 655                         /* There are not the droids you're looking for, move along */
 656                         if (skipFlag==TRUE)
 657                                 continue;
 658                 }
 659 #endif
 660                 if (extractList != NULL) {
 661                         int skipFlag = TRUE;
 662                         for (tmpList = extractList; *tmpList != NULL; tmpList++) {
 663                                 if (strncmp( *tmpList, header.name, strlen(*tmpList))==0 || (
 664                                                         header.name[strlen(header.name)-1]=='/'
 665                                                         && strncmp( *tmpList, header.name,
 666                                                                 MIN(strlen(header.name)-1, strlen(*tmpList)))==0)) {
 667                                         /* If it is a regular file, pretend to extract it with
 668                                          * the extractFlag set to FALSE, so the junk in the tarball
 669                                          * is properly skipped over */
 670                                         skipFlag = FALSE;
 671                                         memmove(extractList+1, extractList,
 672                                                                 sizeof(*extractList)*(tmpList-extractList));
 673                                         extractList++;
 674                                         break;
 675                                 }
 676                         }
 677                         /* There are not the droids you're looking for, move along */
 678                         if (skipFlag == TRUE) {
 679                                 if ( header.type==REGTYPE || header.type==REGTYPE0 )
 680                                         if (tarExtractRegularFile(&header, FALSE, FALSE) == FALSE)
 681                                                 errorFlag = TRUE;
 682                                 continue;
 683                         }
 684                 }
 685
 686                 if (listFlag == TRUE) {
 687                         /* Special treatment if the list (-t) flag is on */
 688                         if (verboseFlag == TRUE) {
 689                                 int len, len1;
 690                                 char buf[35];
 691                                 struct tm *tm = localtime (&(header.mtime));
 692
 693                                 len=printf("%s ", mode_string(header.mode));
 694                                 memset(buf, 0, 8*sizeof(char));
 695                                 my_getpwuid(buf, header.uid);
 696                                 if (! *buf)
 697                                         len+=printf("%d", header.uid);
 698                                 else
 699                                         len+=printf("%s", buf);
 700                                 memset(buf, 0, 8*sizeof(char));
 701                                 my_getgrgid(buf, header.gid);
 702                                 if (! *buf)
 703                                         len+=printf("/%-d ", header.gid);
 704                                 else
 705                                         len+=printf("/%-s ", buf);
 706
 707                                 if (header.type==CHRTYPE || header.type==BLKTYPE) {
 708                                         len1=snprintf(buf, sizeof(buf), "%ld,%-ld ",
 709                                                         header.devmajor, header.devminor);
 710                                 } else {
 711                                         len1=snprintf(buf, sizeof(buf), "%lu ", (long)header.size);
 712                                 }
 713                                 /* Jump through some hoops to make the columns match up */
 714                                 for(;(len+len1)<31;len++)
 715                                         printf(" ");
 716                                 printf(buf);
 717
 718                                 /* Use ISO 8610 time format */
 719                                 if (tm) {
 720                                         printf ("%04d-%02d-%02d %02d:%02d:%02d ",
 721                                                         tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
 722                                                         tm->tm_hour, tm->tm_min, tm->tm_sec);
 723                                 }
 724                         }
 725                         printf("%s", header.name);
 726                         if (verboseFlag == TRUE) {
 727                                 if (header.type==LNKTYPE)       /* If this is a link, say so */
 728                                         printf(" link to %s", header.linkname);
 729                                 else if (header.type==SYMTYPE)
 730                                         printf(" -> %s", header.linkname);
 731                         }
 732                         printf("\n");
 733                 }
 734
 735                 /* List contents if we are supposed to do that */
 736                 if (verboseFlag == TRUE && extractFlag == TRUE) {
 737                         /* Now the normal listing */
 738                         FILE *vbFd = stdout;
 739                         if (tostdoutFlag == TRUE)       // If the archive goes to stdout, verbose to stderr
 740                                 vbFd = stderr;
 741                         fprintf(vbFd, "%s\n", header.name);
 742                 }
 743
 744                 /* Remove files if we would overwrite them */
 745                 if (extractFlag == TRUE && tostdoutFlag == FALSE)
 746                         unlink(header.name);
 747
 748                 /* If we got here, we can be certain we have a legitimate
 749                  * header to work with.  So work with it.  */
 750                 switch ( header.type ) {
 751                         case REGTYPE:
 752                         case REGTYPE0:
 753                                 /* If the name ends in a '/' then assume it is
 754                                  * supposed to be a directory, and fall through */
 755                                 if (header.name[strlen(header.name)-1] != '/') {
 756                                         if (tarExtractRegularFile(&header, extractFlag, tostdoutFlag)==FALSE)
 757                                                 errorFlag=TRUE;
 758                                         break;
 759                                 }
 760                         case DIRTYPE:
 761                                 if (tarExtractDirectory( &header, extractFlag, tostdoutFlag)==FALSE)
 762                                         errorFlag=TRUE;
 763                                 break;
 764                         case LNKTYPE:
 765                                 if (tarExtractHardLink( &header, extractFlag, tostdoutFlag)==FALSE)
 766                                         errorFlag=TRUE;
 767                                 break;
 768                         case SYMTYPE:
 769                                 if (tarExtractSymLink( &header, extractFlag, tostdoutFlag)==FALSE)
 770                                         errorFlag=TRUE;
 771                                 break;
 772                         case CHRTYPE:
 773                         case BLKTYPE:
 774                         case FIFOTYPE:
 775                                 if (tarExtractSpecial( &header, extractFlag, tostdoutFlag)==FALSE)
 776                                         errorFlag=TRUE;
 777                                 break;
 778 #if 0
 779                         /* Handled earlier */
 780                         case GNULONGNAME:
 781                         case GNULONGLINK:
 782                                 skipNextHeaderFlag=TRUE;
 783                                 break;
 784 #endif
 785                         default:
 786                                 error_msg("Unknown file type '%c' in tar file\n", header.type);
 787                                 close( tarFd);
 788                                 return( FALSE);
 789                 }
 790         }
 791         close(tarFd);
 792         if (status > 0) {
 793                 /* Bummer - we read a partial header */
 794                 error_msg( "Error reading tar file: %s\n", strerror(errno));
 795                 return ( FALSE);
 796         }
 797         else if (errorFlag==TRUE) {
 798                 error_msg( "Error exit delayed from previous errors\n");
 799                 return( FALSE);
 800         } else
 801                 return( status);
 802
 803         /* Stuff to do when we are done */
 804 endgame:
 805         close( tarFd);
 806         if (extractList != NULL) {
 807                 for (; *extractList != NULL; extractList++) {
 808                         error_msg("%s: Not found in archive\n", *extractList);
 809                         errorFlag = TRUE;
 810                 }
 811         }
 812         if ( *(header.name) == '\0' ) {
 813                 if (errorFlag==TRUE)
 814                         error_msg( "Error exit delayed from previous errors\n");
 815                 else
 816                         return( TRUE);
 817         }
 818         return( FALSE);
 819 }
 820
 821
 822 #ifdef BB_FEATURE_TAR_CREATE
 823
 824 /*
 825 ** writeTarFile(),  writeFileToTarball(), and writeTarHeader() are
 826 ** the only functions that deal with the HardLinkInfo structure.
 827 ** Even these functions use the xxxHardLinkInfo() functions.
 828 */
 829 typedef struct HardLinkInfo HardLinkInfo;
 830 struct HardLinkInfo
 831 {
 832         HardLinkInfo *next;           /* Next entry in list */
 833         dev_t dev;                    /* Device number */
 834         ino_t ino;                    /* Inode number */
 835         short linkCount;              /* (Hard) Link Count */
 836         char name[1];                 /* Start of filename (must be last) */
 837 };
 838
 839 /* Some info to be carried along when creating a new tarball */
 840 struct TarBallInfo
 841 {
 842         char* fileName;               /* File name of the tarball */
 843         int tarFd;                    /* Open-for-write file descriptor
 844                                                                          for the tarball */
 845         struct stat statBuf;          /* Stat info for the tarball, letting
 846                                                                          us know the inode and device that the
 847                                                                          tarball lives, so we can avoid trying
 848                                                                          to include the tarball into itself */
 849         int verboseFlag;              /* Whether to print extra stuff or not */
 850         char** excludeList;           /* List of files to not include */
 851         HardLinkInfo *hlInfoHead;     /* Hard Link Tracking Information */
 852         HardLinkInfo *hlInfo;         /* Hard Link Info for the current file */
 853 };
 854 typedef struct TarBallInfo TarBallInfo;
 855
 856
 857 /* Might be faster (and bigger) if the dev/ino were stored in numeric order;) */
 858 static void
 859 addHardLinkInfo (HardLinkInfo **hlInfoHeadPtr, dev_t dev, ino_t ino,
 860                 short linkCount, const char *name)
 861 {
 862         /* Note: hlInfoHeadPtr can never be NULL! */
 863         HardLinkInfo *hlInfo;
 864
 865         hlInfo = (HardLinkInfo *)xmalloc(sizeof(HardLinkInfo)+strlen(name)+1);
 866         if (hlInfo) {
 867                 hlInfo->next = *hlInfoHeadPtr;
 868                 *hlInfoHeadPtr = hlInfo;
 869                 hlInfo->dev = dev;
 870                 hlInfo->ino = ino;
 871                 hlInfo->linkCount = linkCount;
 872                 strcpy(hlInfo->name, name);
 873         }
 874         return;
 875 }
 876
 877 static void
 878 freeHardLinkInfo (HardLinkInfo **hlInfoHeadPtr)
 879 {
 880         HardLinkInfo *hlInfo = NULL;
 881         HardLinkInfo *hlInfoNext = NULL;
 882
 883         if (hlInfoHeadPtr) {
 884                 hlInfo = *hlInfoHeadPtr;
 885                 while (hlInfo) {
 886                         hlInfoNext = hlInfo->next;
 887                         free(hlInfo);
 888                         hlInfo = hlInfoNext;
 889                 }
 890                 *hlInfoHeadPtr = NULL;
 891         }
 892         return;
 893 }
 894
 895 /* Might be faster (and bigger) if the dev/ino were stored in numeric order;) */
 896 static HardLinkInfo *
 897 findHardLinkInfo (HardLinkInfo *hlInfo, dev_t dev, ino_t ino)
 898 {
 899         while(hlInfo) {
 900                 if ((ino == hlInfo->ino) && (dev == hlInfo->dev))
 901                         break;
 902                 hlInfo = hlInfo->next;
 903         }
 904         return(hlInfo);
 905 }
 906
 907 /* Put an octal string into the specified buffer.
 908  * The number is zero and space padded and possibly null padded.
 909  * Returns TRUE if successful.  */
 910 static int putOctal (char *cp, int len, long value)
 911 {
 912         int tempLength;
 913         char tempBuffer[32];
 914         char *tempString = tempBuffer;
 915
 916         /* Create a string of the specified length with an initial space,
 917          * leading zeroes and the octal number, and a trailing null.  */
 918         sprintf (tempString, "%0*lo", len - 1, value);
 919
 920         /* If the string is too large, suppress the leading space.  */
 921         tempLength = strlen (tempString) + 1;
 922         if (tempLength > len) {
 923                 tempLength--;
 924                 tempString++;
 925         }
 926
 927         /* If the string is still too large, suppress the trailing null.  */
 928         if (tempLength > len)
 929                 tempLength--;
 930
 931         /* If the string is still too large, fail.  */
 932         if (tempLength > len)
 933                 return FALSE;
 934
 935         /* Copy the string to the field.  */
 936         memcpy (cp, tempString, len);
 937
 938         return TRUE;
 939 }
 940
 941 /* Write out a tar header for the specified file/directory/whatever */
 942 static int
 943 writeTarHeader(struct TarBallInfo *tbInfo, const char *fileName, struct stat *statbuf)
 944 {
 945         long chksum=0;
 946         struct TarHeader header;
 947 #if defined BB_FEATURE_TAR_EXCLUDE
 948         char** tmpList;
 949 #endif
 950         const unsigned char *cp = (const unsigned char *) &header;
 951         ssize_t size = sizeof(struct TarHeader);
 952
 953         memset( &header, 0, size);
 954
 955         if (*fileName=='/') {
 956                 static int alreadyWarned=FALSE;
 957                 if (alreadyWarned==FALSE) {
 958                         error_msg("Removing leading '/' from member names\n");
 959                         alreadyWarned=TRUE;
 960                 }
 961                 strncpy(header.name, fileName+1, sizeof(header.name));
 962         }
 963         else {
 964                 strncpy(header.name, fileName, sizeof(header.name));
 965         }
 966
 967 #if defined BB_FEATURE_TAR_EXCLUDE
 968         /* Check for excluded files....  */
 969         for (tmpList=tbInfo->excludeList; tmpList && *tmpList; tmpList++) {
 970                 /* Do some extra hoop jumping for when directory names
 971                  * end in '/' but the entry in tmpList doesn't */
 972                 if (strncmp( *tmpList, header.name, strlen(*tmpList))==0 || (
 973                                         header.name[strlen(header.name)-1]=='/'
 974                                         && strncmp( *tmpList, header.name,
 975                                                 MIN(strlen(header.name)-1, strlen(*tmpList)))==0)) {
 976                         /* Set the mode to something that is not a regular file, thereby
 977                          * faking out writeTarFile into thinking that nothing further need
 978                          * be done for this file.  Yes, I know this is ugly, but it works. */
 979                         statbuf->st_mode = 0;
 980                         return( TRUE);
 981                 }
 982         }
 983 #endif
 984
 985         putOctal(header.mode, sizeof(header.mode), statbuf->st_mode);
 986         putOctal(header.uid, sizeof(header.uid), statbuf->st_uid);
 987         putOctal(header.gid, sizeof(header.gid), statbuf->st_gid);
 988         putOctal(header.size, sizeof(header.size), 0); /* Regular file size is handled later */
 989         putOctal(header.mtime, sizeof(header.mtime), statbuf->st_mtime);
 990         strncpy(header.magic, TAR_MAGIC TAR_VERSION,
 991                         TAR_MAGIC_LEN + TAR_VERSION_LEN );
 992
 993         /* Enter the user and group names (default to root if it fails) */
 994         my_getpwuid(header.uname, statbuf->st_uid);
 995         if (! *header.uname)
 996                 strcpy(header.uname, "root");
 997         my_getgrgid(header.gname, statbuf->st_gid);
 998         if (! *header.uname)
 999                 strcpy(header.uname, "root");
1000
1001         if (tbInfo->hlInfo) {
1002                 /* This is a hard link */
1003                 header.typeflag = LNKTYPE;
1004                 strncpy(header.linkname, tbInfo->hlInfo->name, sizeof(header.linkname));
1005         } else if (S_ISLNK(statbuf->st_mode)) {
1006                 int link_size=0;
1007                 char buffer[BUFSIZ];
1008                 header.typeflag  = SYMTYPE;
1009                 link_size = readlink(fileName, buffer, sizeof(buffer) - 1);
1010                 if ( link_size < 0) {
1011                         error_msg("Error reading symlink '%s': %s\n", header.name, strerror(errno));
1012                         return ( FALSE);
1013                 }
1014                 buffer[link_size] = '\0';
1015                 strncpy(header.linkname, buffer, sizeof(header.linkname));
1016         } else if (S_ISDIR(statbuf->st_mode)) {
1017                 header.typeflag  = DIRTYPE;
1018                 strncat(header.name, "/", sizeof(header.name));
1019         } else if (S_ISCHR(statbuf->st_mode)) {
1020                 header.typeflag  = CHRTYPE;
1021                 putOctal(header.devmajor, sizeof(header.devmajor), MAJOR(statbuf->st_rdev));
1022                 putOctal(header.devminor, sizeof(header.devminor), MINOR(statbuf->st_rdev));
1023         } else if (S_ISBLK(statbuf->st_mode)) {
1024                 header.typeflag  = BLKTYPE;
1025                 putOctal(header.devmajor, sizeof(header.devmajor), MAJOR(statbuf->st_rdev));
1026                 putOctal(header.devminor, sizeof(header.devminor), MINOR(statbuf->st_rdev));
1027         } else if (S_ISFIFO(statbuf->st_mode)) {
1028                 header.typeflag  = FIFOTYPE;
1029         } else if (S_ISREG(statbuf->st_mode)) {
1030                 header.typeflag  = REGTYPE;
1031                 putOctal(header.size, sizeof(header.size), statbuf->st_size);
1032         } else {
1033                 error_msg("%s: Unknown file type\n", fileName);
1034                 return ( FALSE);
1035         }
1036
1037         /* Calculate and store the checksum (i.e. the sum of all of the bytes of
1038          * the header).  The checksum field must be filled with blanks for the
1039          * calculation.  The checksum field is formatted differently from the
1040          * other fields: it has [6] digits, a null, then a space -- rather than
1041          * digits, followed by a null like the other fields... */
1042         memset(header.chksum, ' ', sizeof(header.chksum));
1043         cp = (const unsigned char *) &header;
1044         while (size-- > 0)
1045                 chksum += *cp++;
1046         putOctal(header.chksum, 7, chksum);
1047
1048         /* Now write the header out to disk */
1049         if ((size=full_write(tbInfo->tarFd, (char*)&header, sizeof(struct TarHeader))) < 0) {
1050                 error_msg(io_error, fileName, strerror(errno));
1051                 return ( FALSE);
1052         }
1053         /* Pad the header up to the tar block size */
1054         for (; size<TAR_BLOCK_SIZE; size++) {
1055                 write(tbInfo->tarFd, "\0", 1);
1056         }
1057         /* Now do the verbose thing (or not) */
1058         if (tbInfo->verboseFlag==TRUE) {
1059                 FILE *vbFd = stdout;
1060                 if (tbInfo->tarFd == fileno(stdout))    // If the archive goes to stdout, verbose to stderr
1061                         vbFd = stderr;
1062                 fprintf(vbFd, "%s\n", header.name);
1063         }
1064
1065         return ( TRUE);
1066 }
1067
1068
1069 static int writeFileToTarball(const char *fileName, struct stat *statbuf, void* userData)
1070 {
1071         struct TarBallInfo *tbInfo = (struct TarBallInfo *)userData;
1072
1073         /*
1074         ** Check to see if we are dealing with a hard link.
1075         ** If so -
1076         ** Treat the first occurance of a given dev/inode as a file while
1077         ** treating any additional occurances as hard links.  This is done
1078         ** by adding the file information to the HardLinkInfo linked list.
1079         */
1080         tbInfo->hlInfo = NULL;
1081         if (statbuf->st_nlink > 1) {
1082                 tbInfo->hlInfo = findHardLinkInfo(tbInfo->hlInfoHead, statbuf->st_dev,
1083                                 statbuf->st_ino);
1084                 if (tbInfo->hlInfo == NULL)
1085                         addHardLinkInfo (&tbInfo->hlInfoHead, statbuf->st_dev,
1086                                         statbuf->st_ino, statbuf->st_nlink, fileName);
1087         }
1088
1089         /* It is against the rules to archive a socket */
1090         if (S_ISSOCK(statbuf->st_mode)) {
1091                 error_msg("%s: socket ignored\n", fileName);
1092                 return( TRUE);
1093         }
1094
1095         /* It is a bad idea to store the archive we are in the process of creating,
1096          * so check the device and inode to be sure that this particular file isn't
1097          * the new tarball */
1098         if (tbInfo->statBuf.st_dev == statbuf->st_dev &&
1099                         tbInfo->statBuf.st_ino == statbuf->st_ino) {
1100                 error_msg("%s: file is the archive; skipping\n", fileName);
1101                 return( TRUE);
1102         }
1103
1104         if (strlen(fileName) >= NAME_SIZE) {
1105                 error_msg(name_longer_than_foo, NAME_SIZE);
1106                 return ( TRUE);
1107         }
1108
1109         if (writeTarHeader(tbInfo, fileName, statbuf)==FALSE) {
1110                 return( FALSE);
1111         }
1112
1113         /* Now, if the file is a regular file, copy it out to the tarball */
1114         if ((tbInfo->hlInfo == NULL)
1115         &&  (S_ISREG(statbuf->st_mode))) {
1116                 int  inputFileFd;
1117                 char buffer[BUFSIZ];
1118                 ssize_t size=0, readSize=0;
1119
1120                 /* open the file we want to archive, and make sure all is well */
1121                 if ((inputFileFd = open(fileName, O_RDONLY)) < 0) {
1122                         error_msg("%s: Cannot open: %s\n", fileName, strerror(errno));
1123                         return( FALSE);
1124                 }
1125
1126                 /* write the file to the archive */
1127                 while ( (size = full_read(inputFileFd, buffer, sizeof(buffer))) > 0 ) {
1128                         if (full_write(tbInfo->tarFd, buffer, size) != size ) {
1129                                 /* Output file seems to have a problem */
1130                                 error_msg(io_error, fileName, strerror(errno));
1131                                 return( FALSE);
1132                         }
1133                         readSize+=size;
1134                 }
1135                 if (size == -1) {
1136                         error_msg(io_error, fileName, strerror(errno));
1137                         return( FALSE);
1138                 }
1139                 /* Pad the file up to the tar block size */
1140                 for (; (readSize%TAR_BLOCK_SIZE) != 0; readSize++) {
1141                         write(tbInfo->tarFd, "\0", 1);
1142                 }
1143                 close( inputFileFd);
1144         }
1145
1146         return( TRUE);
1147 }
1148
1149 static int writeTarFile(const char* tarName, int verboseFlag, char **argv,
1150                 char** excludeList)
1151 {
1152         int tarFd=-1;
1153         int errorFlag=FALSE;
1154         ssize_t size;
1155         struct TarBallInfo tbInfo;
1156         tbInfo.verboseFlag = verboseFlag;
1157         tbInfo.hlInfoHead = NULL;
1158
1159         /* Make sure there is at least one file to tar up.  */
1160         if (*argv == NULL)
1161                 error_msg_and_die("Cowardly refusing to create an empty archive\n");
1162
1163         /* Open the tar file for writing.  */
1164         if (!strcmp(tarName, "-"))
1165                 tbInfo.tarFd = fileno(stdout);
1166         else
1167                 tbInfo.tarFd = open (tarName, O_WRONLY | O_CREAT | O_TRUNC, 0644);
1168         if (tbInfo.tarFd < 0) {
1169                 error_msg( "Error opening '%s': %s\n", tarName, strerror(errno));
1170                 freeHardLinkInfo(&tbInfo.hlInfoHead);
1171                 return ( FALSE);
1172         }
1173         tbInfo.excludeList=excludeList;
1174         /* Store the stat info for the tarball's file, so
1175          * can avoid including the tarball into itself....  */
1176         if (fstat(tbInfo.tarFd, &tbInfo.statBuf) < 0)
1177                 error_msg_and_die(io_error, tarName, strerror(errno));
1178
1179         /* Set the umask for this process so it doesn't
1180          * screw up permission setting for us later. */
1181         umask(0);
1182
1183         /* Read the directory/files and iterate over them one at a time */
1184         while (*argv != NULL) {
1185                 if (recursive_action(*argv++, TRUE, FALSE, FALSE,
1186                                         writeFileToTarball, writeFileToTarball,
1187                                         (void*) &tbInfo) == FALSE) {
1188                         errorFlag = TRUE;
1189                 }
1190         }
1191         /* Write two empty blocks to the end of the archive */
1192         for (size=0; size<(2*TAR_BLOCK_SIZE); size++) {
1193                 write(tbInfo.tarFd, "\0", 1);
1194         }
1195
1196         /* To be pedantically correct, we would check if the tarball
1197          * is smaller than 20 tar blocks, and pad it if it was smaller,
1198          * but that isn't necessary for GNU tar interoperability, and
1199          * so is considered a waste of space */
1200
1201         /* Hang up the tools, close up shop, head home */
1202         close(tarFd);
1203         if (errorFlag == TRUE) {
1204                 error_msg("Error exit delayed from previous errors\n");
1205                 freeHardLinkInfo(&tbInfo.hlInfoHead);
1206                 return(FALSE);
1207         }
1208         freeHardLinkInfo(&tbInfo.hlInfoHead);
1209         return( TRUE);
1210 }
1211
1212
1213 #endif
1214