1 /* vi: set sw=4 ts=4: */
3 * Mini tar implementation for busybox
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 pretty
7 * different (i.e. cleaner, less global variables, etc)
9 * Copyright (C) 2000 by Lineo, inc.
10 * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
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.
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.
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.
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.
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
40 #define BB_DECLARE_EXTERN
41 #define bb_need_io_error
50 #include <sys/types.h>
51 #include <sys/sysmacros.h>
52 #include <sys/param.h> /* for PATH_MAX */
55 #ifdef BB_FEATURE_TAR_CREATE
57 static const char tar_usage[] =
58 "tar -[cxtvOf] [tarFile] [-X excludeFile] [FILE] ...\n\n"
59 "Create, extract, or list files from a tar file. Note that\n"
60 "this version of tar packs hard links as separate files.\n\n"
63 "\tc=create, x=extract, t=list contents, v=verbose,\n"
64 "\tO=extract to stdout, f=tarfile or \"-\" for stdin\n"
69 static const char tar_usage[] =
70 "tar -[xtvO] [-f tarFile] [-X excludeFile] [FILE] ...\n\n"
71 "Extract, or list files stored in a tar file. This\n"
72 "version of tar does not support creation of tar files.\n\n"
75 "\tx=extract, t=list contents, v=verbose,\n"
76 "\tO=extract to stdout, f=tarfile or \"-\" for stdin\n"
83 /* Tar file constants */
85 #define MAJOR(dev) (((dev)>>8)&0xff)
86 #define MINOR(dev) ((dev)&0xff)
90 /* POSIX tar Header Block, from POSIX 1003.1-1990 */
94 char name[100]; /* 0 */
95 char mode[8]; /* 100 */
96 char uid[8]; /* 108 */
97 char gid[8]; /* 116 */
98 char size[12]; /* 124 */
99 char mtime[12]; /* 136 */
100 char chksum[8]; /* 148 */
101 char typeflag; /* 156 */
102 char linkname[100]; /* 157 */
103 char magic[6]; /* 257 */
104 char version[2]; /* 263 */
105 char uname[32]; /* 265 */
106 char gname[32]; /* 297 */
107 char devmajor[8]; /* 329 */
108 char devminor[8]; /* 337 */
109 char prefix[155]; /* 345 */
112 typedef struct TarHeader TarHeader;
115 /* A few useful constants */
116 #define TAR_MAGIC "ustar" /* ustar and a null */
117 //#define TAR_VERSION "00" /* 00 and no null */
118 #define TAR_VERSION " " /* Be compatable with old GNU format */
119 #define TAR_MAGIC_LEN 6
120 #define TAR_VERSION_LEN 2
121 #define TAR_BLOCK_SIZE 512
123 /* A nice enum with all the possible tar file content types */
126 REGTYPE = '0', /* regular file */
127 REGTYPE0 = '\0', /* regular file (ancient bug compat)*/
128 LNKTYPE = '1', /* hard link */
129 SYMTYPE = '2', /* symbolic link */
130 CHRTYPE = '3', /* character special */
131 BLKTYPE = '4', /* block special */
132 DIRTYPE = '5', /* directory */
133 FIFOTYPE = '6', /* FIFO special */
134 CONTTYPE = '7', /* reserved */
136 typedef enum TarFileType TarFileType;
138 /* This struct ignores magic, non-numeric user name,
139 * non-numeric group name, and the checksum, since
140 * these are all ignored by BusyBox tar. */
143 int tarFd; /* An open file descriptor for reading from the tarball */
144 char * name; /* File name */
145 mode_t mode; /* Unix mode, including device bits. */
146 uid_t uid; /* Numeric UID */
147 gid_t gid; /* Numeric GID */
148 size_t size; /* Size of file */
149 time_t mtime; /* Last-modified time */
150 enum TarFileType type; /* Regular, directory, link, etc */
151 char * linkname; /* Name for symbolic and hard links */
152 long devmajor; /* Major number for special device */
153 long devminor; /* Minor number for special device */
155 typedef struct TarInfo TarInfo;
158 static const unsigned long TarChecksumOffset = (const unsigned long)&(((TarHeader *)0)->chksum);
161 /* Local procedures to restore files from a tar file. */
162 static int readTarFile(const char* tarName, int extractFlag, int listFlag,
163 int tostdoutFlag, int verboseFlag, char** excludeList);
167 #ifdef BB_FEATURE_TAR_CREATE
168 /* Local procedures to save files into a tar file. */
169 static int writeTarFile(const char* tarName, int tostdoutFlag,
170 int verboseFlag, int argc, char **argv, char** excludeList);
174 extern int tar_main(int argc, char **argv)
176 char** excludeList=NULL;
177 int excludeListSize=0;
178 const char *tarName=NULL;
179 int listFlag = FALSE;
180 int extractFlag = FALSE;
181 int createFlag = FALSE;
182 int verboseFlag = FALSE;
183 int tostdoutFlag = FALSE;
189 /* Parse any options */
190 while (--argc > 0 && **(++argv) == '-') {
192 while (stopIt==FALSE && *(++(*argv))) {
196 fatalError( "Option requires an argument: No file specified\n");
199 fatalError( "Only one 'f' option allowed\n");
202 fatalError( "Option requires an argument: No file specified\n");
207 if (extractFlag == TRUE || createFlag == TRUE)
213 if (listFlag == TRUE || createFlag == TRUE)
218 if (extractFlag == TRUE || listFlag == TRUE)
233 fatalError( "Option requires an argument: No file specified\n");
235 excludeList=realloc( excludeList, sizeof(char**) * (excludeListSize+1));
236 excludeList[excludeListSize] = *(++argv);
237 /* Remove leading "/"s */
238 if (*excludeList[excludeListSize] =='/') {
239 excludeList[excludeListSize] = (excludeList[excludeListSize])+1;
241 if (excludeList[excludeListSize++] == NULL)
242 fatalError( "Option requires an argument: No file specified\n");
251 fatalError( "Unknown tar flag '%c'\n"
252 "Try `tar --help' for more information\n", **argv);
257 for (i=0; i<excludeListSize; i++) {
258 printf( "%s\n", excludeList[i]);
265 * Do the correct type of action supplying the rest of the
266 * command line arguments as the list of files to process.
268 if (createFlag == TRUE) {
269 #ifndef BB_FEATURE_TAR_CREATE
270 fatalError( "This version of tar was not compiled with tar creation support.\n");
272 exit(writeTarFile(tarName, tostdoutFlag, verboseFlag, argc, argv, excludeList));
275 exit(readTarFile(tarName, extractFlag, listFlag, tostdoutFlag, verboseFlag, excludeList));
279 fatalError( "Exactly one of 'c', 'x' or 't' must be specified\n");
283 fixUpPermissions(TarInfo *header)
286 /* Now set permissions etc for the new file */
287 chown(header->name, header->uid, header->gid);
288 chmod(header->name, header->mode);
291 t.modtime = header->mtime;
292 utime(header->name, &t);
296 tarExtractRegularFile(TarInfo *header, int extractFlag, int tostdoutFlag)
300 size_t actualWriteSz;
302 size_t size = header->size;
303 int outFd=fileno(stdout);
305 /* Open the file to be written, if a file is supposed to be written */
306 if (extractFlag==TRUE && tostdoutFlag==FALSE) {
307 if ((outFd=open(header->name, O_CREAT|O_TRUNC|O_WRONLY, header->mode & ~S_IFMT)) < 0)
308 errorMsg(io_error, header->name, strerror(errno));
309 /* Create the path to the file, just in case it isn't there...
310 * This should not screw up path permissions or anything. */
311 createPath(header->name, 0777);
314 /* Write out the file, if we are supposed to be doing that */
317 if ( size > sizeof(buffer) )
318 writeSize = readSize = sizeof(buffer);
320 int mod = size % 512;
322 readSize = size + (512 - mod);
327 if ( (readSize = fullRead(header->tarFd, buffer, readSize)) <= 0 ) {
328 /* Tarball seems to have a problem */
329 errorMsg("tar: Unexpected EOF in archive\n");
332 if ( readSize < writeSize )
333 writeSize = readSize;
335 /* Write out the file, if we are supposed to be doing that */
336 if (extractFlag==TRUE) {
338 if ((actualWriteSz=fullWrite(outFd, buffer, writeSize)) != writeSize ) {
339 /* Output file seems to have a problem */
340 errorMsg(io_error, header->name, strerror(errno));
345 size -= actualWriteSz;
348 /* Now we are done writing the file out, so try
349 * and fix up the permissions and whatnot */
350 if (extractFlag==TRUE && tostdoutFlag==FALSE) {
352 fixUpPermissions(header);
358 tarExtractDirectory(TarInfo *header, int extractFlag, int tostdoutFlag)
361 if (extractFlag==FALSE || tostdoutFlag==TRUE)
364 if (createPath(header->name, header->mode) != TRUE) {
365 errorMsg("tar: %s: Cannot mkdir: %s\n",
366 header->name, strerror(errno));
369 /* make the final component, just in case it was
370 * omitted by createPath() (which will skip the
371 * directory if it doesn't have a terminating '/') */
372 if (mkdir(header->name, header->mode) == 0) {
373 fixUpPermissions(header);
379 tarExtractHardLink(TarInfo *header, int extractFlag, int tostdoutFlag)
381 if (extractFlag==FALSE || tostdoutFlag==TRUE)
384 if (link(header->linkname, header->name) < 0) {
385 errorMsg("tar: %s: Cannot create hard link to '%s': %s\n",
386 header->name, header->linkname, strerror(errno));
390 /* Now set permissions etc for the new directory */
391 fixUpPermissions(header);
396 tarExtractSymLink(TarInfo *header, int extractFlag, int tostdoutFlag)
398 if (extractFlag==FALSE || tostdoutFlag==TRUE)
402 if (symlink(header->linkname, header->name) < 0) {
403 errorMsg("tar: %s: Cannot create symlink to '%s': %s\n",
404 header->name, header->linkname, strerror(errno));
407 /* Try to change ownership of the symlink.
408 * If libs doesn't support that, don't bother.
409 * Changing the pointed-to-file is the Wrong Thing(tm).
411 #if (__GLIBC__ >= 2) && (__GLIBC_MINOR__ >= 1)
412 lchown(header->name, header->uid, header->gid);
415 /* Do not change permissions or date on symlink,
416 * since it changes the pointed to file instead. duh. */
418 errorMsg("tar: %s: Cannot create symlink to '%s': %s\n",
419 header->name, header->linkname,
420 "symlinks not supported");
426 tarExtractSpecial(TarInfo *header, int extractFlag, int tostdoutFlag)
428 if (extractFlag==FALSE || tostdoutFlag==TRUE)
431 if (S_ISCHR(header->mode) || S_ISBLK(header->mode) || S_ISSOCK(header->mode)) {
432 if (mknod(header->name, header->mode, makedev(header->devmajor, header->devminor)) < 0) {
433 errorMsg("tar: %s: Cannot mknod: %s\n",
434 header->name, strerror(errno));
437 } else if (S_ISFIFO(header->mode)) {
438 if (mkfifo(header->name, header->mode) < 0) {
439 errorMsg("tar: %s: Cannot mkfifo: %s\n",
440 header->name, strerror(errno));
445 /* Now set permissions etc for the new directory */
446 fixUpPermissions(header);
450 /* Read an octal value in a field of the specified width, with optional
451 * spaces on both sides of the number and with an optional null character
452 * at the end. Returns -1 on an illegal format. */
453 static long getOctal(const char *cp, int size)
457 for(;(size > 0) && (*cp == ' '); cp++, size--);
458 if ((size == 0) || !isOctal(*cp))
460 for(; (size > 0) && isOctal(*cp); size--) {
461 val = val * 8 + *cp++ - '0';
463 for (;(size > 0) && (*cp == ' '); cp++, size--);
464 if ((size > 0) && *cp)
470 /* Parse the tar header and fill in the nice struct with the details */
472 readTarHeader(struct TarHeader *rawHeader, struct TarInfo *header)
476 unsigned char *s = (unsigned char *)rawHeader;
478 header->name = rawHeader->name;
479 header->mode = getOctal(rawHeader->mode, sizeof(rawHeader->mode));
480 header->uid = getOctal(rawHeader->uid, sizeof(rawHeader->uid));
481 header->gid = getOctal(rawHeader->gid, sizeof(rawHeader->gid));
482 header->size = getOctal(rawHeader->size, sizeof(rawHeader->size));
483 header->mtime = getOctal(rawHeader->mtime, sizeof(rawHeader->mtime));
484 chksum = getOctal(rawHeader->chksum, sizeof(rawHeader->chksum));
485 header->type = rawHeader->typeflag;
486 header->linkname = rawHeader->linkname;
487 header->devmajor = getOctal(rawHeader->devmajor, sizeof(rawHeader->devmajor));
488 header->devminor = getOctal(rawHeader->devminor, sizeof(rawHeader->devminor));
490 /* Check the checksum */
491 sum = ' ' * sizeof(rawHeader->chksum);
492 for ( i = TarChecksumOffset; i > 0; i-- )
494 s += sizeof(rawHeader->chksum);
495 for ( i = (512 - TarChecksumOffset - sizeof(rawHeader->chksum)); i > 0; i-- )
504 * Read a tar file and extract or list the specified files within it.
505 * If the list is empty than all files are extracted or listed.
507 static int readTarFile(const char* tarName, int extractFlag, int listFlag,
508 int tostdoutFlag, int verboseFlag, char** excludeList)
514 int alreadyWarned=FALSE;
515 //int skipFileFlag=FALSE;
517 /* Open the tar file for reading. */
518 if (!strcmp(tarName, "-"))
519 tarFd = fileno(stdin);
521 tarFd = open(tarName, O_RDONLY);
523 errorMsg( "Error opening '%s': %s\n", tarName, strerror(errno));
527 /* Set the umask for this process so it doesn't
528 * screw up permission setting for us later. */
531 /* Read the tar file, and iterate over it one file at a time */
532 while ( (status = fullRead(tarFd, (char*)&rawHeader, TAR_BLOCK_SIZE)) == TAR_BLOCK_SIZE ) {
534 /* First, try to read the header */
535 if ( readTarHeader(&rawHeader, &header) == FALSE ) {
537 if ( *(header.name) == '\0' ) {
541 errorMsg("Bad tar header, skipping\n");
545 if ( *(header.name) == '\0' )
548 /* Check for and relativify any absolute paths */
549 if ( *(header.name) == '/' ) {
551 while (*(header.name) == '/')
554 if (alreadyWarned == FALSE) {
555 errorMsg("Absolute path detected, removing leading slashes\n");
556 alreadyWarned = TRUE;
560 /* Special treatment if the list (-t) flag is on */
561 if (verboseFlag == TRUE && extractFlag == FALSE) {
564 struct tm *tm = localtime (&(header.mtime));
566 len=printf("%s ", modeString(header.mode));
567 memset(buf, 0, 8*sizeof(char));
568 my_getpwuid(buf, header.uid);
570 len+=printf("%d", header.uid);
572 len+=printf("%s", buf);
573 memset(buf, 0, 8*sizeof(char));
574 my_getgrgid(buf, header.gid);
576 len+=printf("/%-d ", header.gid);
578 len+=printf("/%-s ", buf);
580 if (header.type==CHRTYPE || header.type==BLKTYPE) {
581 len1=snprintf(buf, sizeof(buf), "%ld,%-ld ",
582 header.devmajor, header.devminor);
584 len1=snprintf(buf, sizeof(buf), "%d ", header.size);
586 /* Jump through some hoops to make the columns match up */
587 for(;(len+len1)<31;len++)
591 /* Use ISO 8610 time format */
593 printf ("%04d-%02d-%02d %02d:%02d:%02d ",
594 tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
595 tm->tm_hour, tm->tm_min, tm->tm_sec);
598 /* List contents if we are supposed to do that */
599 if (verboseFlag == TRUE || listFlag == TRUE) {
600 /* Now the normal listing */
601 printf("%s", header.name);
603 if (verboseFlag == TRUE && listFlag == TRUE) {
604 /* If this is a link, say so */
605 if (header.type==LNKTYPE)
606 printf(" link to %s", header.linkname);
607 else if (header.type==SYMTYPE)
608 printf(" -> %s", header.linkname);
610 if (verboseFlag == TRUE || listFlag == TRUE) {
615 /* See if we want to restore this file or not */
617 if (wantFileName(outName) == FALSE) {
621 /* Remove any clutter lying in our way */
622 unlink( header.name);
624 /* If we got here, we can be certain we have a legitimate
625 * header to work with. So work with it. */
626 switch ( header.type ) {
629 /* If the name ends in a '/' then assume it is
630 * supposed to be a directory, and fall through */
631 if (header.name[strlen(header.name)-1] != '/') {
632 if (tarExtractRegularFile(&header, extractFlag, tostdoutFlag)==FALSE)
637 if (tarExtractDirectory( &header, extractFlag, tostdoutFlag)==FALSE)
641 if (tarExtractHardLink( &header, extractFlag, tostdoutFlag)==FALSE)
645 if (tarExtractSymLink( &header, extractFlag, tostdoutFlag)==FALSE)
651 if (tarExtractSpecial( &header, extractFlag, tostdoutFlag)==FALSE)
661 /* Bummer - we read a partial header */
662 errorMsg( "Error reading '%s': %s\n", tarName, strerror(errno));
665 else if (errorFlag==TRUE) {
666 errorMsg( "tar: Error exit delayed from previous errors\n");
671 /* Stuff to do when we are done */
674 if ( *(header.name) == '\0' ) {
676 errorMsg( "tar: Error exit delayed from previous errors\n");
684 #ifdef BB_FEATURE_TAR_CREATE
686 /* Some info to be carried along when creating a new tarball */
689 char* fileName; /* File name of the tarball */
690 int tarFd; /* Open-for-write file descriptor
692 struct stat statBuf; /* Stat info for the tarball, letting
693 us know the inode and device that the
694 tarball lives, so we can avoid trying
695 to include the tarball into itself */
696 int verboseFlag; /* Whether to print extra stuff or not */
697 char** excludeList; /* List of files to not include */
699 typedef struct TarBallInfo TarBallInfo;
702 /* Put an octal string into the specified buffer.
703 * The number is zero and space padded and possibly null padded.
704 * Returns TRUE if successful. */
705 static int putOctal (char *cp, int len, long value)
709 char *tempString = tempBuffer;
711 /* Create a string of the specified length with an initial space,
712 * leading zeroes and the octal number, and a trailing null. */
713 sprintf (tempString, "%0*lo", len - 1, value);
715 /* If the string is too large, suppress the leading space. */
716 tempLength = strlen (tempString) + 1;
717 if (tempLength > len) {
722 /* If the string is still too large, suppress the trailing null. */
723 if (tempLength > len)
726 /* If the string is still too large, fail. */
727 if (tempLength > len)
730 /* Copy the string to the field. */
731 memcpy (cp, tempString, len);
736 /* Write out a tar header for the specified file/directory/whatever */
738 writeTarHeader(struct TarBallInfo *tbInfo, const char *fileName, struct stat *statbuf)
741 struct TarHeader header;
743 const unsigned char *cp = (const unsigned char *) &header;
744 ssize_t size = sizeof(struct TarHeader);
746 memset( &header, 0, size);
748 if (*fileName=='/') {
749 static int alreadyWarned=FALSE;
750 if (alreadyWarned==FALSE) {
751 errorMsg("tar: Removing leading '/' from member names\n");
754 strcpy(header.name, fileName+1);
757 strcpy(header.name, fileName);
760 /* Now that leading '/''s have been removed */
761 for (tmpList=tbInfo->excludeList; tmpList && *tmpList; tmpList++) {
762 printf( "comparing '%s' and '%s'", *tmpList, header.name);
763 if (strcmp( *tmpList, header.name)==0)
764 printf( ": match\n");
770 putOctal(header.mode, sizeof(header.mode), statbuf->st_mode);
771 putOctal(header.uid, sizeof(header.uid), statbuf->st_uid);
772 putOctal(header.gid, sizeof(header.gid), statbuf->st_gid);
773 putOctal(header.size, sizeof(header.size), 0); /* Regular file size is handled later */
774 putOctal(header.mtime, sizeof(header.mtime), statbuf->st_mtime);
775 strncpy(header.magic, TAR_MAGIC TAR_VERSION,
776 TAR_MAGIC_LEN + TAR_VERSION_LEN );
778 my_getpwuid(header.uname, statbuf->st_uid);
779 /* Put some sort of sane fallback in place... */
781 strncpy(header.uname, "root", 5);
782 my_getgrgid(header.gname, statbuf->st_gid);
784 strncpy(header.uname, "root", 5);
786 // FIXME: (or most likely not) I break Hard Links
787 if (S_ISLNK(statbuf->st_mode)) {
789 header.typeflag = SYMTYPE;
790 if ( readlink(fileName, buffer, sizeof(buffer) - 1) < 0) {
791 errorMsg("Error reading symlink '%s': %s\n", header.name, strerror(errno));
794 strncpy(header.linkname, buffer, sizeof(header.linkname));
795 } else if (S_ISDIR(statbuf->st_mode)) {
796 header.typeflag = DIRTYPE;
797 strncat(header.name, "/", sizeof(header.name));
798 } else if (S_ISCHR(statbuf->st_mode)) {
799 header.typeflag = CHRTYPE;
800 putOctal(header.devmajor, sizeof(header.devmajor), MAJOR(statbuf->st_rdev));
801 putOctal(header.devminor, sizeof(header.devminor), MINOR(statbuf->st_rdev));
802 } else if (S_ISBLK(statbuf->st_mode)) {
803 header.typeflag = BLKTYPE;
804 putOctal(header.devmajor, sizeof(header.devmajor), MAJOR(statbuf->st_rdev));
805 putOctal(header.devminor, sizeof(header.devminor), MINOR(statbuf->st_rdev));
806 } else if (S_ISFIFO(statbuf->st_mode)) {
807 header.typeflag = FIFOTYPE;
808 } else if (S_ISREG(statbuf->st_mode)) {
809 header.typeflag = REGTYPE;
810 putOctal(header.size, sizeof(header.size), statbuf->st_size);
812 errorMsg("tar: %s: Unknown file type\n", fileName);
816 /* Calculate and store the checksum (i.e. the sum of all of the bytes of
817 * the header). The checksum field must be filled with blanks for the
818 * calculation. The checksum field is formatted differently from the
819 * other fields: it has [6] digits, a null, then a space -- rather than
820 * digits, followed by a null like the other fields... */
821 memset(header.chksum, ' ', sizeof(header.chksum));
822 cp = (const unsigned char *) &header;
825 putOctal(header.chksum, 7, chksum);
827 /* Now write the header out to disk */
828 if ((size=fullWrite(tbInfo->tarFd, (char*)&header, sizeof(struct TarHeader))) < 0) {
829 errorMsg(io_error, fileName, strerror(errno));
832 /* Pad the header up to the tar block size */
833 for (; size<TAR_BLOCK_SIZE; size++) {
834 write(tbInfo->tarFd, "\0", 1);
836 /* Now do the verbose thing (or not) */
837 if (tbInfo->verboseFlag==TRUE)
838 fprintf(stdout, "%s\n", header.name);
844 static int writeFileToTarball(const char *fileName, struct stat *statbuf, void* userData)
846 struct TarBallInfo *tbInfo = (struct TarBallInfo *)userData;
848 /* It is against the rules to archive a socket */
849 if (S_ISSOCK(statbuf->st_mode)) {
850 errorMsg("tar: %s: socket ignored\n", fileName);
854 /* It is a bad idea to store the archive we are in the process of creating,
855 * so check the device and inode to be sure that this particular file isn't
857 if (tbInfo->statBuf.st_dev == statbuf->st_dev &&
858 tbInfo->statBuf.st_ino == statbuf->st_ino) {
859 errorMsg("tar: %s: file is the archive; skipping\n", fileName);
863 if (writeTarHeader(tbInfo, fileName, statbuf)==FALSE) {
867 /* Now, if the file is a regular file, copy it out to the tarball */
868 if (S_ISREG(statbuf->st_mode)) {
871 ssize_t size=0, readSize=0;
873 /* open the file we want to archive, and make sure all is well */
874 if ((inputFileFd = open(fileName, O_RDONLY)) < 0) {
875 errorMsg("tar: %s: Cannot open: %s\n", fileName, strerror(errno));
879 /* write the file to the archive */
880 while ( (size = fullRead(inputFileFd, buffer, sizeof(buffer))) > 0 ) {
881 if (fullWrite(tbInfo->tarFd, buffer, size) != size ) {
882 /* Output file seems to have a problem */
883 errorMsg(io_error, fileName, strerror(errno));
889 errorMsg(io_error, fileName, strerror(errno));
892 /* Pad the file up to the tar block size */
893 for (; (readSize%TAR_BLOCK_SIZE) != 0; readSize++) {
894 write(tbInfo->tarFd, "\0", 1);
902 static int writeTarFile(const char* tarName, int tostdoutFlag,
903 int verboseFlag, int argc, char **argv, char** excludeList)
908 struct TarBallInfo tbInfo;
909 tbInfo.verboseFlag = verboseFlag;
911 /* Make sure there is at least one file to tar up. */
913 fatalError("tar: Cowardly refusing to create an empty archive\n");
915 /* Open the tar file for writing. */
916 if (tostdoutFlag == TRUE)
917 tbInfo.tarFd = fileno(stdout);
919 tbInfo.tarFd = open (tarName, O_WRONLY | O_CREAT | O_TRUNC, 0644);
920 if (tbInfo.tarFd < 0) {
921 errorMsg( "tar: Error opening '%s': %s\n", tarName, strerror(errno));
924 tbInfo.excludeList=excludeList;
925 /* Store the stat info for the tarball's file, so
926 * can avoid including the tarball into itself.... */
927 if (fstat(tbInfo.tarFd, &tbInfo.statBuf) < 0)
928 fatalError(io_error, tarName, strerror(errno));
930 /* Set the umask for this process so it doesn't
931 * screw up permission setting for us later. */
934 /* Read the directory/files and iterate over them one at a time */
936 if (recursiveAction(*argv++, TRUE, FALSE, FALSE,
937 writeFileToTarball, writeFileToTarball,
938 (void*) &tbInfo) == FALSE) {
942 /* Write two empty blocks to the end of the archive */
943 for (size=0; size<(2*TAR_BLOCK_SIZE); size++) {
944 write(tbInfo.tarFd, "\0", 1);
946 /* Hang up the tools, close up shop, head home */
948 if (errorFlag == TRUE) {
949 errorMsg("tar: Error exit delayed from previous errors\n");