1 /* vi: set sw=4 ts=4: */
3 * Mini tar implementation for busybox
5 * Modified to use common extraction code used by ar, cpio, dpkg-deb, dpkg
6 * Glenn McGrath <bug1@iinet.net.au>
8 * Note, that as of BusyBox-0.43, tar has been completely rewritten from the
9 * ground up. It still has remnants of the old code lying about, but it is
10 * very different now (i.e., cleaner, less global variables, etc.)
12 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
14 * Based in part in the tar implementation in sash
15 * Copyright (c) 1999 by David I. Bell
16 * Permission is granted to use, distribute, or modify this source,
17 * provided that this copyright notice remains intact.
18 * Permission to distribute sash derived code under the GPL has been granted.
20 * Based in part on the tar implementation from busybox-0.28
21 * Copyright (C) 1995 Bruce Perens
22 * This is free software under the GNU General Public License.
24 * This program is free software; you can redistribute it and/or modify
25 * it under the terms of the GNU General Public License as published by
26 * the Free Software Foundation; either version 2 of the License, or
27 * (at your option) any later version.
29 * This program is distributed in the hope that it will be useful,
30 * but WITHOUT ANY WARRANTY; without even the implied warranty of
31 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
32 * General Public License for more details.
34 * You should have received a copy of the GNU General Public License
35 * along with this program; if not, write to the Free Software
36 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
51 #include <sys/socket.h>
52 #include <sys/sysmacros.h> /* major() and minor() */
53 #include "unarchive.h"
56 #ifdef CONFIG_FEATURE_TAR_CREATE
58 /* Tar file constants */
59 # define TAR_MAGIC "ustar" /* ustar and a null */
60 # define TAR_VERSION " " /* Be compatable with GNU tar format */
62 static const int TAR_BLOCK_SIZE = 512;
63 static const int TAR_MAGIC_LEN = 6;
64 static const int TAR_VERSION_LEN = 2;
66 /* POSIX tar Header Block, from POSIX 1003.1-1990 */
67 enum { NAME_SIZE = 100 }; /* because gcc won't let me use 'static const int' */
68 struct TarHeader { /* byte offset */
69 char name[NAME_SIZE]; /* 0-99 */
70 char mode[8]; /* 100-107 */
71 char uid[8]; /* 108-115 */
72 char gid[8]; /* 116-123 */
73 char size[12]; /* 124-135 */
74 char mtime[12]; /* 136-147 */
75 char chksum[8]; /* 148-155 */
76 char typeflag; /* 156-156 */
77 char linkname[NAME_SIZE]; /* 157-256 */
78 char magic[6]; /* 257-262 */
79 char version[2]; /* 263-264 */
80 char uname[32]; /* 265-296 */
81 char gname[32]; /* 297-328 */
82 char devmajor[8]; /* 329-336 */
83 char devminor[8]; /* 337-344 */
84 char prefix[155]; /* 345-499 */
85 char padding[12]; /* 500-512 (pad to exactly the TAR_BLOCK_SIZE) */
87 typedef struct TarHeader TarHeader;
90 ** writeTarFile(), writeFileToTarball(), and writeTarHeader() are
91 ** the only functions that deal with the HardLinkInfo structure.
92 ** Even these functions use the xxxHardLinkInfo() functions.
94 typedef struct HardLinkInfo HardLinkInfo;
96 HardLinkInfo *next; /* Next entry in list */
97 dev_t dev; /* Device number */
98 ino_t ino; /* Inode number */
99 short linkCount; /* (Hard) Link Count */
100 char name[1]; /* Start of filename (must be last) */
103 /* Some info to be carried along when creating a new tarball */
105 char *fileName; /* File name of the tarball */
106 int tarFd; /* Open-for-write file descriptor
108 struct stat statBuf; /* Stat info for the tarball, letting
109 us know the inode and device that the
110 tarball lives, so we can avoid trying
111 to include the tarball into itself */
112 int verboseFlag; /* Whether to print extra stuff or not */
113 const llist_t *excludeList; /* List of files to not include */
114 HardLinkInfo *hlInfoHead; /* Hard Link Tracking Information */
115 HardLinkInfo *hlInfo; /* Hard Link Info for the current file */
117 typedef struct TarBallInfo TarBallInfo;
119 /* A nice enum with all the possible tar file content types */
121 REGTYPE = '0', /* regular file */
122 REGTYPE0 = '\0', /* regular file (ancient bug compat) */
123 LNKTYPE = '1', /* hard link */
124 SYMTYPE = '2', /* symbolic link */
125 CHRTYPE = '3', /* character special */
126 BLKTYPE = '4', /* block special */
127 DIRTYPE = '5', /* directory */
128 FIFOTYPE = '6', /* FIFO special */
129 CONTTYPE = '7', /* reserved */
130 GNULONGLINK = 'K', /* GNU long (>100 chars) link name */
131 GNULONGNAME = 'L', /* GNU long (>100 chars) file name */
133 typedef enum TarFileType TarFileType;
135 /* Might be faster (and bigger) if the dev/ino were stored in numeric order;) */
136 static inline void addHardLinkInfo(HardLinkInfo ** hlInfoHeadPtr,
137 struct stat *statbuf,
140 /* Note: hlInfoHeadPtr can never be NULL! */
141 HardLinkInfo *hlInfo;
143 hlInfo = (HardLinkInfo *) xmalloc(sizeof(HardLinkInfo) + strlen(name));
144 hlInfo->next = *hlInfoHeadPtr;
145 *hlInfoHeadPtr = hlInfo;
146 hlInfo->dev = statbuf->st_dev;
147 hlInfo->ino = statbuf->st_ino;
148 hlInfo->linkCount = statbuf->st_nlink;
149 strcpy(hlInfo->name, name);
152 static void freeHardLinkInfo(HardLinkInfo ** hlInfoHeadPtr)
154 HardLinkInfo *hlInfo = NULL;
155 HardLinkInfo *hlInfoNext = NULL;
158 hlInfo = *hlInfoHeadPtr;
160 hlInfoNext = hlInfo->next;
164 *hlInfoHeadPtr = NULL;
169 /* Might be faster (and bigger) if the dev/ino were stored in numeric order;) */
170 static inline HardLinkInfo *findHardLinkInfo(HardLinkInfo * hlInfo, struct stat *statbuf)
173 if ((statbuf->st_ino == hlInfo->ino) && (statbuf->st_dev == hlInfo->dev))
175 hlInfo = hlInfo->next;
180 /* Put an octal string into the specified buffer.
181 * The number is zero and space padded and possibly null padded.
182 * Returns TRUE if successful. */
183 static int putOctal(char *cp, int len, long value)
187 char *tempString = tempBuffer;
189 /* Create a string of the specified length with an initial space,
190 * leading zeroes and the octal number, and a trailing null. */
191 sprintf(tempString, "%0*lo", len - 1, value);
193 /* If the string is too large, suppress the leading space. */
194 tempLength = strlen(tempString) + 1;
195 if (tempLength > len) {
200 /* If the string is still too large, suppress the trailing null. */
201 if (tempLength > len)
204 /* If the string is still too large, fail. */
205 if (tempLength > len)
208 /* Copy the string to the field. */
209 memcpy(cp, tempString, len);
214 /* Write out a tar header for the specified file/directory/whatever */
215 static inline int writeTarHeader(struct TarBallInfo *tbInfo,
216 const char *header_name,
217 const char *real_name, struct stat *statbuf)
220 struct TarHeader header;
221 const unsigned char *cp = (const unsigned char *) &header;
222 ssize_t size = sizeof(struct TarHeader);
224 memset(&header, 0, size);
226 strncpy(header.name, header_name, sizeof(header.name));
228 putOctal(header.mode, sizeof(header.mode), statbuf->st_mode);
229 putOctal(header.uid, sizeof(header.uid), statbuf->st_uid);
230 putOctal(header.gid, sizeof(header.gid), statbuf->st_gid);
231 putOctal(header.size, sizeof(header.size), 0); /* Regular file size is handled later */
232 putOctal(header.mtime, sizeof(header.mtime), statbuf->st_mtime);
233 strncpy(header.magic, TAR_MAGIC TAR_VERSION,
234 TAR_MAGIC_LEN + TAR_VERSION_LEN);
236 /* Enter the user and group names (default to root if it fails) */
237 if (my_getpwuid(header.uname, statbuf->st_uid, sizeof(header.uname)) == NULL)
238 strcpy(header.uname, "root");
239 if (my_getgrgid(header.gname, statbuf->st_gid, sizeof(header.gname)) == NULL)
240 strcpy(header.gname, "root");
242 if (tbInfo->hlInfo) {
243 /* This is a hard link */
244 header.typeflag = LNKTYPE;
245 strncpy(header.linkname, tbInfo->hlInfo->name,
246 sizeof(header.linkname));
247 } else if (S_ISLNK(statbuf->st_mode)) {
248 char *lpath = xreadlink(real_name);
250 if (!lpath) /* Already printed err msg inside xreadlink() */
252 header.typeflag = SYMTYPE;
253 strncpy(header.linkname, lpath, sizeof(header.linkname));
255 } else if (S_ISDIR(statbuf->st_mode)) {
256 header.typeflag = DIRTYPE;
257 strncat(header.name, "/", sizeof(header.name));
258 } else if (S_ISCHR(statbuf->st_mode)) {
259 header.typeflag = CHRTYPE;
260 putOctal(header.devmajor, sizeof(header.devmajor),
261 major(statbuf->st_rdev));
262 putOctal(header.devminor, sizeof(header.devminor),
263 minor(statbuf->st_rdev));
264 } else if (S_ISBLK(statbuf->st_mode)) {
265 header.typeflag = BLKTYPE;
266 putOctal(header.devmajor, sizeof(header.devmajor),
267 major(statbuf->st_rdev));
268 putOctal(header.devminor, sizeof(header.devminor),
269 minor(statbuf->st_rdev));
270 } else if (S_ISFIFO(statbuf->st_mode)) {
271 header.typeflag = FIFOTYPE;
272 } else if (S_ISREG(statbuf->st_mode)) {
273 header.typeflag = REGTYPE;
274 putOctal(header.size, sizeof(header.size), statbuf->st_size);
276 bb_error_msg("%s: Unknown file type", real_name);
280 /* Calculate and store the checksum (i.e., the sum of all of the bytes of
281 * the header). The checksum field must be filled with blanks for the
282 * calculation. The checksum field is formatted differently from the
283 * other fields: it has [6] digits, a null, then a space -- rather than
284 * digits, followed by a null like the other fields... */
285 memset(header.chksum, ' ', sizeof(header.chksum));
286 cp = (const unsigned char *) &header;
289 putOctal(header.chksum, 7, chksum);
291 /* Now write the header out to disk */
293 bb_full_write(tbInfo->tarFd, (char *) &header,
294 sizeof(struct TarHeader))) < 0) {
295 bb_error_msg(bb_msg_io_error, real_name);
298 /* Pad the header up to the tar block size */
299 for (; size < TAR_BLOCK_SIZE; size++) {
300 write(tbInfo->tarFd, "\0", 1);
302 /* Now do the verbose thing (or not) */
304 if (tbInfo->verboseFlag) {
307 if (tbInfo->tarFd == STDOUT_FILENO) /* If the archive goes to stdout, verbose to stderr */
310 fprintf(vbFd, "%s\n", header.name);
316 # ifdef CONFIG_FEATURE_TAR_FROM
317 static inline int exclude_file(const llist_t *excluded_files, const char *file)
319 while (excluded_files) {
320 if (excluded_files->data[0] == '/') {
321 if (fnmatch(excluded_files->data, file,
322 FNM_PATHNAME | FNM_LEADING_DIR) == 0)
327 for (p = file; p[0] != '\0'; p++) {
328 if ((p == file || p[-1] == '/') && p[0] != '/' &&
329 fnmatch(excluded_files->data, p,
330 FNM_PATHNAME | FNM_LEADING_DIR) == 0)
334 excluded_files = excluded_files->link;
341 static int writeFileToTarball(const char *fileName, struct stat *statbuf,
344 struct TarBallInfo *tbInfo = (struct TarBallInfo *) userData;
345 const char *header_name;
348 ** Check to see if we are dealing with a hard link.
350 ** Treat the first occurance of a given dev/inode as a file while
351 ** treating any additional occurances as hard links. This is done
352 ** by adding the file information to the HardLinkInfo linked list.
354 tbInfo->hlInfo = NULL;
355 if (statbuf->st_nlink > 1) {
356 tbInfo->hlInfo = findHardLinkInfo(tbInfo->hlInfoHead, statbuf);
357 if (tbInfo->hlInfo == NULL)
358 addHardLinkInfo(&tbInfo->hlInfoHead, statbuf, fileName);
361 /* It is against the rules to archive a socket */
362 if (S_ISSOCK(statbuf->st_mode)) {
363 bb_error_msg("%s: socket ignored", fileName);
367 /* It is a bad idea to store the archive we are in the process of creating,
368 * so check the device and inode to be sure that this particular file isn't
370 if (tbInfo->statBuf.st_dev == statbuf->st_dev &&
371 tbInfo->statBuf.st_ino == statbuf->st_ino) {
372 bb_error_msg("%s: file is the archive; skipping", fileName);
376 header_name = fileName;
377 while (header_name[0] == '/') {
378 static int alreadyWarned = FALSE;
380 if (alreadyWarned == FALSE) {
381 bb_error_msg("Removing leading '/' from member names");
382 alreadyWarned = TRUE;
387 if (strlen(fileName) >= NAME_SIZE) {
388 bb_error_msg(bb_msg_name_longer_than_foo, NAME_SIZE);
392 if (header_name[0] == '\0')
395 # ifdef CONFIG_FEATURE_TAR_FROM
396 if (exclude_file(tbInfo->excludeList, header_name)) {
399 # endif /* CONFIG_FEATURE_TAR_FROM */
401 if (writeTarHeader(tbInfo, header_name, fileName, statbuf) == FALSE) {
405 /* Now, if the file is a regular file, copy it out to the tarball */
406 if ((tbInfo->hlInfo == NULL)
407 && (S_ISREG(statbuf->st_mode))) {
409 ssize_t readSize = 0;
411 /* open the file we want to archive, and make sure all is well */
412 if ((inputFileFd = open(fileName, O_RDONLY)) < 0) {
413 bb_perror_msg("%s: Cannot open", fileName);
417 /* write the file to the archive */
418 readSize = bb_copyfd_eof(inputFileFd, tbInfo->tarFd);
420 /* Pad the file up to the tar block size */
421 for (; (readSize % TAR_BLOCK_SIZE) != 0; readSize++) {
422 write(tbInfo->tarFd, "\0", 1);
430 static inline int writeTarFile(const int tar_fd, const int verboseFlag,
431 const unsigned long dereferenceFlag, const llist_t *include,
432 const llist_t *exclude, const int gzip)
434 #ifdef CONFIG_FEATURE_TAR_GZIP
435 int gzipDataPipe[2] = { -1, -1 };
436 int gzipStatusPipe[2] = { -1, -1 };
438 volatile int vfork_exec_errno = 0;
441 int errorFlag = FALSE;
443 struct TarBallInfo tbInfo;
445 tbInfo.hlInfoHead = NULL;
447 fchmod(tar_fd, 0644);
448 tbInfo.tarFd = tar_fd;
449 tbInfo.verboseFlag = verboseFlag;
451 /* Store the stat info for the tarball's file, so
452 * can avoid including the tarball into itself.... */
453 if (fstat(tbInfo.tarFd, &tbInfo.statBuf) < 0)
454 bb_perror_msg_and_die("Couldnt stat tar file");
456 #ifdef CONFIG_FEATURE_TAR_GZIP
458 if (pipe(gzipDataPipe) < 0 || pipe(gzipStatusPipe) < 0) {
459 bb_perror_msg_and_die("Failed to create gzip pipe");
462 signal(SIGPIPE, SIG_IGN); /* we only want EPIPE on errors */
465 /* Avoid vfork clobbering */
473 dup2(gzipDataPipe[0], 0);
474 close(gzipDataPipe[1]);
476 if (tbInfo.tarFd != 1)
477 dup2(tbInfo.tarFd, 1);
479 close(gzipStatusPipe[0]);
480 fcntl(gzipStatusPipe[1], F_SETFD, FD_CLOEXEC); /* close on exec shows sucess */
482 execl("/bin/gzip", "gzip", "-f", 0);
483 vfork_exec_errno = errno;
485 close(gzipStatusPipe[1]);
487 } else if (gzipPid > 0) {
488 close(gzipDataPipe[0]);
489 close(gzipStatusPipe[1]);
494 int n = bb_full_read(gzipStatusPipe[0], &buf, 1);
496 if (n == 0 && vfork_exec_errno != 0) {
497 errno = vfork_exec_errno;
498 bb_perror_msg_and_die("Could not exec gzip process");
499 } else if ((n < 0) && (errno == EAGAIN || errno == EINTR))
500 continue; /* try it again */
503 close(gzipStatusPipe[0]);
505 tbInfo.tarFd = gzipDataPipe[1];
507 bb_perror_msg_and_die("Failed to vfork gzip process");
512 tbInfo.excludeList = exclude;
514 /* Read the directory/files and iterate over them one at a time */
516 if (!recursive_action(include->data, TRUE, dereferenceFlag, FALSE,
517 writeFileToTarball, writeFileToTarball,
521 include = include->link;
523 /* Write two empty blocks to the end of the archive */
524 for (size = 0; size < (2 * TAR_BLOCK_SIZE); size++) {
525 write(tbInfo.tarFd, "\0", 1);
528 /* To be pedantically correct, we would check if the tarball
529 * is smaller than 20 tar blocks, and pad it if it was smaller,
530 * but that isn't necessary for GNU tar interoperability, and
531 * so is considered a waste of space */
533 /* Hang up the tools, close up shop, head home */
536 bb_error_msg("Error exit delayed from previous errors");
538 freeHardLinkInfo(&tbInfo.hlInfoHead);
540 #ifdef CONFIG_FEATURE_TAR_GZIP
541 if (gzip && gzipPid) {
542 if (waitpid(gzipPid, NULL, 0) == -1)
543 printf("Couldnt wait ?");
549 #endif /* tar_create */
551 #ifdef CONFIG_FEATURE_TAR_FROM
552 static llist_t *append_file_list_to_list(llist_t *list)
558 llist_t *newlist = NULL;
561 src_stream = bb_xfopen(cur->data, "r");
565 while((line = bb_get_chomped_line_from_file(src_stream)) != NULL) {
566 newlist = llist_add_to(newlist, line);
574 #ifdef CONFIG_FEATURE_TAR_COMPRESS
575 static char get_header_tar_Z(archive_handle_t *archive_handle)
577 /* Cant lseek over pipe's */
578 archive_handle->seek = seek_by_char;
580 /* do the decompression, and cleanup */
581 if ((bb_xread_char(archive_handle->src_fd) != 0x1f) || (bb_xread_char(archive_handle->src_fd) != 0x9d)) {
582 bb_error_msg_and_die("Invalid magic");
585 archive_handle->src_fd = open_transformer(archive_handle->src_fd, uncompress);
586 archive_handle->offset = 0;
587 while (get_header_tar(archive_handle) == EXIT_SUCCESS);
589 /* Can only do one file at a time */
590 return(EXIT_FAILURE);
594 #define CTX_TEST (1 << 0)
595 #define CTX_EXTRACT (1 << 1)
596 #define TAR_OPT_BASEDIR (1 << 2)
597 #define TAR_OPT_TARNAME (1 << 3)
598 #define TAR_OPT_2STDOUT (1 << 4)
599 #define TAR_OPT_P (1 << 5)
600 #define TAR_OPT_VERBOSE (1 << 6)
601 #define TAR_OPT_KEEP_OLD (1 << 7)
603 #ifdef CONFIG_FEATURE_TAR_CREATE
604 # define CTX_CREATE (1 << 8)
605 # define TAR_OPT_DEREFERNCE (1 << 9)
606 # define TAR_OPT_STR_CREATE "ch"
607 # define TAR_OPT_FLAG_CREATE 2
609 //# define CTX_CREATE 0
610 # define TAR_OPT_STR_CREATE ""
611 # define TAR_OPT_FLAG_CREATE 0
614 #ifdef CONFIG_FEATURE_TAR_BZIP2
615 # define TAR_OPT_BZIP2 (1 << (8 + TAR_OPT_FLAG_CREATE))
616 # define TAR_OPT_STR_BZIP2 "j"
617 # define TAR_OPT_FLAG_BZIP2 1
619 # define TAR_OPT_STR_BZIP2 ""
620 # define TAR_OPT_FLAG_BZIP2 0
623 #ifdef CONFIG_FEATURE_TAR_FROM
624 # define TAR_OPT_INCLUDE_FROM (1 << (8 + TAR_OPT_FLAG_CREATE + TAR_OPT_FLAG_BZIP2))
625 # define TAR_OPT_EXCLUDE_FROM (1 << (8 + TAR_OPT_FLAG_CREATE + TAR_OPT_FLAG_BZIP2 + 1))
626 # define TAR_OPT_STR_FROM "T:X:"
627 # define TAR_OPT_FLAG_FROM 2
629 # define TAR_OPT_STR_FROM ""
630 # define TAR_OPT_FLAG_FROM 0
633 #ifdef CONFIG_FEATURE_TAR_GZIP
634 # define TAR_OPT_GZIP (1 << (8 + TAR_OPT_FLAG_CREATE + TAR_OPT_FLAG_BZIP2 + TAR_OPT_FLAG_FROM))
635 # define TAR_OPT_STR_GZIP "z"
636 # define TAR_OPT_FLAG_GZIP 1
638 # define TAR_OPT_STR_GZIP ""
639 # define TAR_OPT_FLAG_GZIP 0
642 #ifdef CONFIG_FEATURE_TAR_COMPRESS
643 # define TAR_OPT_UNCOMPRESS (1 << (8 + TAR_OPT_FLAG_CREATE + TAR_OPT_FLAG_BZIP2 + TAR_OPT_FLAG_FROM + TAR_OPT_FLAG_GZIP))
644 # define TAR_OPT_STR_COMPRESS "Z"
646 # define TAR_OPT_STR_COMPRESS ""
649 static const char tar_options[]="txC:f:Opvk" \
654 TAR_OPT_STR_COMPRESS;
656 #ifdef CONFIG_FEATURE_TAR_LONG_OPTIONS
657 static const struct option tar_long_options[] = {
658 { "list", 0, NULL, 't' },
659 { "extract", 0, NULL, 'x' },
660 { "directory", 1, NULL, 'C' },
661 { "file", 1, NULL, 'f' },
662 { "to-stdout", 0, NULL, 'O' },
663 { "same-permissions", 0, NULL, 'p' },
664 { "verbose", 0, NULL, 'v' },
665 { "keep-old", 0, NULL, 'k' },
666 # ifdef CONFIG_FEATURE_TAR_CREATE
667 { "create", 0, NULL, 'c' },
668 { "dereference", 0, NULL, 'h' },
670 # ifdef CONFIG_FEATURE_TAR_BZIP2
671 { "bzip2", 0, NULL, 'j' },
673 # ifdef CONFIG_FEATURE_TAR_FROM
674 { "files-from", 1, NULL, 'T' },
675 { "exclude-from", 1, NULL, 'X' },
677 # ifdef CONFIG_FEATURE_TAR_GZIP
678 { "gzip", 0, NULL, 'z' },
680 # ifdef CONFIG_FEATURE_TAR_COMPRESS
681 { "compress", 0, NULL, 'Z' },
687 int tar_main(int argc, char **argv)
689 char (*get_header_ptr)(archive_handle_t *) = get_header_tar;
690 archive_handle_t *tar_handle;
691 char *base_dir = NULL;
692 const char *tar_filename = "-";
694 unsigned long ctx_flag = 0;
700 /* Prepend '-' to the first argument if required */
701 if (argv[1][0] != '-') {
704 bb_xasprintf(&tmp, "-%s", argv[1]);
708 /* Initialise default values */
709 tar_handle = init_handle();
710 tar_handle->flags = ARCHIVE_CREATE_LEADING_DIRS | ARCHIVE_PRESERVE_DATE | ARCHIVE_EXTRACT_UNCONDITIONAL;
712 bb_opt_complementaly = "c~tx:t~cx:x~ct:X*:T*";
713 #ifdef CONFIG_FEATURE_TAR_LONG_OPTIONS
714 bb_applet_long_options = tar_long_options;
717 opt = bb_getopt_ulflags(argc, argv, tar_options,
718 &base_dir, /* Change to dir <optarg> */
719 &tar_filename /* archive filename */
720 #ifdef CONFIG_FEATURE_TAR_FROM
721 , &(tar_handle->accept),
722 &(tar_handle->reject)
726 /* Check one and only one context option was given */
727 if(opt & 0x80000000UL) {
730 #ifdef CONFIG_FEATURE_TAR_CREATE
731 ctx_flag = opt & (CTX_CREATE | CTX_TEST | CTX_EXTRACT);
733 ctx_flag = opt & (CTX_TEST | CTX_EXTRACT);
738 if(ctx_flag & CTX_TEST) {
739 if ((tar_handle->action_header == header_list) ||
740 (tar_handle->action_header == header_verbose_list)) {
741 tar_handle->action_header = header_verbose_list;
743 tar_handle->action_header = header_list;
746 if(ctx_flag & CTX_EXTRACT) {
747 if (tar_handle->action_data != data_extract_to_stdout)
748 tar_handle->action_data = data_extract_all;
750 if(opt & TAR_OPT_2STDOUT) {
752 tar_handle->action_data = data_extract_to_stdout;
754 if(opt & TAR_OPT_VERBOSE) {
755 if ((tar_handle->action_header == header_list) ||
756 (tar_handle->action_header == header_verbose_list))
758 tar_handle->action_header = header_verbose_list;
760 tar_handle->action_header = header_list;
763 if (opt & TAR_OPT_KEEP_OLD) {
764 tar_handle->flags &= ~ARCHIVE_EXTRACT_UNCONDITIONAL;
767 #ifdef CONFIG_FEATURE_TAR_GZIP
768 if(opt & TAR_OPT_GZIP) {
769 get_header_ptr = get_header_tar_gz;
772 #ifdef CONFIG_FEATURE_TAR_BZIP2
773 if(opt & TAR_OPT_BZIP2) {
774 get_header_ptr = get_header_tar_bz2;
777 #ifdef CONFIG_FEATURE_TAR_COMPRESS
778 if(opt & TAR_OPT_UNCOMPRESS) {
779 get_header_ptr = get_header_tar_Z;
782 #ifdef CONFIG_FEATURE_TAR_FROM
783 if(opt & TAR_OPT_EXCLUDE_FROM) {
784 tar_handle->reject = append_file_list_to_list(tar_handle->reject);
786 if(opt & TAR_OPT_INCLUDE_FROM) {
787 tar_handle->accept = append_file_list_to_list(tar_handle->accept);
791 /* Check if we are reading from stdin */
792 if ((argv[optind]) && (*argv[optind] == '-')) {
793 /* Default is to read from stdin, so just skip to next arg */
797 /* Setup an array of filenames to work with */
798 /* TODO: This is the same as in ar, separate function ? */
799 while (optind < argc) {
800 char *filename_ptr = last_char_is(argv[optind], '/');
802 *filename_ptr = '\0';
804 tar_handle->accept = llist_add_to(tar_handle->accept, argv[optind]);
808 if ((tar_handle->accept) || (tar_handle->reject)) {
809 tar_handle->filter = filter_accept_reject_list;
812 /* Open the tar file */
817 #ifdef CONFIG_FEATURE_TAR_CREATE
818 if (opt & CTX_CREATE) {
819 /* Make sure there is at least one file to tar up. */
820 if (tar_handle->accept == NULL) {
821 bb_error_msg_and_die("Cowardly refusing to create an empty archive");
824 flags = O_WRONLY | O_CREAT | O_EXCL;
825 unlink(tar_filename);
833 if ((tar_filename[0] == '-') && (tar_filename[1] == '\0')) {
834 tar_handle->src_fd = fileno(tar_stream);
835 tar_handle->seek = seek_by_char;
837 tar_handle->src_fd = bb_xopen(tar_filename, flags);
841 if ((base_dir) && (chdir(base_dir))) {
842 bb_perror_msg_and_die("Couldnt chdir to %s", base_dir);
845 #ifdef CONFIG_FEATURE_TAR_CREATE
846 /* create an archive */
847 if (opt & CTX_CREATE) {
848 int verboseFlag = FALSE;
849 int gzipFlag = FALSE;
851 # ifdef CONFIG_FEATURE_TAR_GZIP
852 if (get_header_ptr == get_header_tar_gz) {
855 # endif /* CONFIG_FEATURE_TAR_GZIP */
856 # ifdef CONFIG_FEATURE_TAR_BZIP2
857 if (get_header_ptr == get_header_tar_bz2) {
858 bb_error_msg_and_die("Creating bzip2 compressed archives is not currently supported.");
860 # endif /* CONFIG_FEATURE_TAR_BZIP2 */
862 if ((tar_handle->action_header == header_list) ||
863 (tar_handle->action_header == header_verbose_list)) {
866 writeTarFile(tar_handle->src_fd, verboseFlag, opt & TAR_OPT_DEREFERNCE, tar_handle->accept,
867 tar_handle->reject, gzipFlag);
869 #endif /* CONFIG_FEATURE_TAR_CREATE */
871 while (get_header_ptr(tar_handle) == EXIT_SUCCESS);
873 /* Ckeck that every file that should have been extracted was */
874 while (tar_handle->accept) {
875 if (find_list_entry(tar_handle->reject, tar_handle->accept->data) == NULL) {
876 if (find_list_entry(tar_handle->passed, tar_handle->accept->data) == NULL) {
877 bb_error_msg_and_die("%s: Not found in archive\n", tar_handle->accept->data);
880 tar_handle->accept = tar_handle->accept->link;
884 #ifdef CONFIG_FEATURE_CLEAN_UP
885 if (tar_handle->src_fd != STDIN_FILENO) {
886 close(tar_handle->src_fd);
888 #endif /* CONFIG_FEATURE_CLEAN_UP */
890 return(EXIT_SUCCESS);