2 * Copyright (C) 2000 by Glenn McGrath
3 * Copyright (C) 2001 by Laurence Anderson
5 * Based on previous work by busybox developers and others.
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU Library General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
30 #define CONFIG_FEATURE_TAR_OLDGNU_COMPATABILITY 1
31 #define CONFIG_FEATURE_TAR_GNU_EXTENSIONS
33 #ifdef CONFIG_FEATURE_TAR_GNU_EXTENSIONS
34 static char *longname
= NULL
;
35 static char *linkname
= NULL
;
38 extern void seek_sub_file(FILE *src_stream
, const int count
);
39 extern char *extract_archive(FILE *src_stream
, FILE *out_stream
, const file_header_t
*file_entry
,
40 const int function
, const char *prefix
);
43 #ifdef L_archive_offset
46 extern off_t archive_offset
;
49 #ifdef L_seek_sub_file
50 void seek_sub_file(FILE *src_stream
, const int count
)
53 /* Try to fseek as faster */
54 archive_offset
+= count
;
55 if (fseek(src_stream
, count
, SEEK_CUR
) != 0 && errno
== ESPIPE
) {
56 for (i
= 0; i
< count
; i
++) {
66 #ifdef L_extract_archive
67 /* Extract the data postioned at src_stream to either filesystem, stdout or
68 * buffer depending on the value of 'function' which is defined in libbb.h
70 * prefix doesnt have to be just a directory, it may prefix the filename as well.
72 * e.g. '/var/lib/dpkg/info/dpkg.' will extract all files to the base bath
73 * '/var/lib/dpkg/info/' and all files/dirs created in that dir will have
74 * 'dpkg.' as their prefix
76 * For this reason if prefix does point to a dir then it must end with a
77 * trailing '/' or else the last dir will be assumed to be the file prefix
79 char *extract_archive(FILE *src_stream
, FILE *out_stream
, const file_header_t
*file_entry
,
80 const int function
, const char *prefix
)
82 FILE *dst_stream
= NULL
;
83 char *full_name
= NULL
;
84 char *full_link_name
= NULL
;
90 /* prefix doesnt have to be a proper path it may prepend
91 * the filename as well */
93 /* strip leading '/' in filename to extract as prefix may not be dir */
94 /* Cant use concat_path_file here as prefix might not be a directory */
95 char *path
= file_entry
->name
;
96 if (strncmp("./", path
, 2) == 0) {
98 if (strlen(path
) == 0) {
102 full_name
= xmalloc(strlen(prefix
) + strlen(path
) + 1);
103 strcpy(full_name
, prefix
);
104 strcat(full_name
, path
);
105 if ( file_entry
->link_name
){
106 full_link_name
= xmalloc(strlen(prefix
) + strlen(file_entry
->link_name
) + 1);
107 strcpy(full_link_name
, prefix
);
108 strcat(full_link_name
, file_entry
->link_name
);
111 full_name
= strdup(file_entry
->name
);
112 if ( file_entry
->link_name
)
113 full_link_name
= strdup(file_entry
->link_name
);
117 if (function
& extract_to_stdout
) {
118 if (S_ISREG(file_entry
->mode
)) {
119 copy_file_chunk(src_stream
, out_stream
, file_entry
->size
);
120 archive_offset
+= file_entry
->size
;
123 else if (function
& extract_one_to_buffer
) {
124 if (S_ISREG(file_entry
->mode
)) {
125 buffer
= (char *) xmalloc(file_entry
->size
+ 1);
126 fread(buffer
, 1, file_entry
->size
, src_stream
);
127 buffer
[file_entry
->size
] = '\0';
128 archive_offset
+= file_entry
->size
;
132 else if (function
& extract_all_to_fs
) {
135 stat_res
= lstat (full_name
, &oldfile
);
136 if (stat_res
== 0) { /* The file already exists */
137 if ((function
& extract_unconditional
) || (oldfile
.st_mtime
< file_entry
->mtime
)) {
138 if (!S_ISDIR(oldfile
.st_mode
)) {
139 unlink(full_name
); /* Directories might not be empty etc */
142 if ((function
& extract_quiet
) != extract_quiet
) {
143 error_msg("%s not created: newer or same age file exists", file_entry
->name
);
145 seek_sub_file(src_stream
, file_entry
->size
);
149 if (function
& extract_create_leading_dirs
) { /* Create leading directories with default umask */
151 buf
= xstrdup(full_name
);
152 parent
= dirname(buf
);
153 if (make_directory (parent
, -1, FILEUTILS_RECUR
) != 0) {
154 if ((function
& extract_quiet
) != extract_quiet
) {
155 error_msg("couldn't create leading directories");
160 switch(file_entry
->mode
& S_IFMT
) {
162 if (file_entry
->link_name
) { /* Found a cpio hard link */
163 if (link(full_link_name
, full_name
) != 0) {
164 if ((function
& extract_quiet
) != extract_quiet
) {
165 perror_msg("Cannot link from %s to '%s'",
166 file_entry
->name
, file_entry
->link_name
);
170 if ((dst_stream
= wfopen(full_name
, "w")) == NULL
) {
171 seek_sub_file(src_stream
, file_entry
->size
);
174 archive_offset
+= file_entry
->size
;
175 copy_file_chunk(src_stream
, dst_stream
, file_entry
->size
);
181 if (mkdir(full_name
, file_entry
->mode
) < 0) {
182 if ((function
& extract_quiet
) != extract_quiet
) {
183 perror_msg("extract_archive: %s", full_name
);
189 if (symlink(file_entry
->link_name
, full_name
) < 0) {
190 if ((function
& extract_quiet
) != extract_quiet
) {
191 perror_msg("Cannot create symlink from %s to '%s'", file_entry
->name
, file_entry
->link_name
);
200 if (mknod(full_name
, file_entry
->mode
, file_entry
->device
) == -1) {
201 if ((function
& extract_quiet
) != extract_quiet
) {
202 perror_msg("Cannot create node %s", file_entry
->name
);
208 perror_msg("Don't know how to handle %s", full_name
);
212 /* Changing a symlink's properties normally changes the properties of the
213 * file pointed to, so dont try and change the date or mode, lchown does
214 * does the right thing, but isnt available in older versions of libc */
215 if (S_ISLNK(file_entry
->mode
)) {
216 #if (__GLIBC__ > 2) && (__GLIBC_MINOR__ > 1)
217 lchown(full_name
, file_entry
->uid
, file_entry
->gid
);
220 if (function
& extract_preserve_date
) {
221 t
.actime
= file_entry
->mtime
;
222 t
.modtime
= file_entry
->mtime
;
223 utime(full_name
, &t
);
225 chown(full_name
, file_entry
->uid
, file_entry
->gid
);
226 chmod(full_name
, file_entry
->mode
);
229 /* If we arent extracting data we have to skip it,
230 * if data size is 0 then then just do it anyway
231 * (saves testing for it) */
232 seek_sub_file(src_stream
, file_entry
->size
);
235 /* extract_list and extract_verbose_list can be used in conjunction
236 * with one of the above four extraction functions, so do this seperately */
237 if (function
& extract_verbose_list
) {
238 fprintf(out_stream
, "%s %d/%d %8d %s ", mode_string(file_entry
->mode
),
239 file_entry
->uid
, file_entry
->gid
,
240 (int) file_entry
->size
, time_string(file_entry
->mtime
));
242 if ((function
& extract_list
) || (function
& extract_verbose_list
)){
243 /* fputs doesnt add a trailing \n, so use fprintf */
244 fprintf(out_stream
, "%s\n", file_entry
->name
);
248 if ( full_link_name
)
249 free(full_link_name
);
251 return(NULL
); /* Maybe we should say if failed */
256 char *unarchive(FILE *src_stream
, FILE *out_stream
,
257 file_header_t
*(*get_headers
)(FILE *),
258 void (*free_headers
)(file_header_t
*),
259 const int extract_function
, const char *prefix
, char **extract_names
)
261 file_header_t
*file_entry
;
267 while ((file_entry
= get_headers(src_stream
)) != NULL
) {
269 /* fprintf(stderr, __FUNCTION__ " getting headers\n"); */
270 if (extract_names
!= NULL
) {
271 int found_flag
= FALSE
;
272 for(i
= 0; extract_names
[i
] != 0; i
++) {
273 if (strcmp(extract_names
[i
], file_entry
->name
) == 0) {
278 if (extract_function
& extract_exclude_list
) {
279 if (found_flag
== TRUE
) {
280 extract_flag
= FALSE
;
283 /* If its not found in the include list dont extract it */
284 if (found_flag
== FALSE
) {
285 extract_flag
= FALSE
;
291 if (extract_flag
== TRUE
) {
292 /* fprintf(stderr, __FUNCTION__ " extract?\n"); */
293 buffer
= extract_archive(src_stream
, out_stream
, file_entry
, extract_function
, prefix
);
294 /* fprintf(stderr, __FUNCTION__ " extracted\n"); */
296 /* seek past the data entry */
297 seek_sub_file(src_stream
, file_entry
->size
);
299 free_headers(file_entry
);
301 /*fprintf(stderr, __FUNCTION__ " goin home\n");*/
307 #ifdef L_get_header_ar
308 file_header_t
*get_header_ar(FILE *src_stream
)
310 file_header_t
*typed
;
323 static char *ar_long_names
;
325 if (fread(ar
.raw
, 1, 60, src_stream
) != 60) {
328 archive_offset
+= 60;
329 /* align the headers based on the header magic */
330 if ((ar
.formated
.magic
[0] != '`') || (ar
.formated
.magic
[1] != '\n')) {
331 /* some version of ar, have an extra '\n' after each data entry,
332 * this puts the next header out by 1 */
333 if (ar
.formated
.magic
[1] != '`') {
334 error_msg("Invalid magic");
337 /* read the next char out of what would be the data section,
338 * if its a '\n' then it is a valid header offset by 1*/
340 if (fgetc(src_stream
) != '\n') {
341 error_msg("Invalid magic");
344 /* fix up the header, we started reading 1 byte too early */
345 /* raw_header[60] wont be '\n' as it should, but it doesnt matter */
346 memmove(ar
.raw
, &ar
.raw
[1], 59);
349 typed
= (file_header_t
*) xcalloc(1, sizeof(file_header_t
));
351 typed
->size
= (size_t) atoi(ar
.formated
.size
);
352 /* long filenames have '/' as the first character */
353 if (ar
.formated
.name
[0] == '/') {
354 if (ar
.formated
.name
[1] == '/') {
355 /* If the second char is a '/' then this entries data section
356 * stores long filename for multiple entries, they are stored
357 * in static variable long_names for use in future entries */
358 ar_long_names
= (char *) xrealloc(ar_long_names
, typed
->size
);
359 fread(ar_long_names
, 1, typed
->size
, src_stream
);
360 archive_offset
+= typed
->size
;
361 /* This ar entries data section only contained filenames for other records
362 * they are stored in the static ar_long_names for future reference */
363 return (get_header_ar(src_stream
)); /* Return next header */
364 } else if (ar
.formated
.name
[1] == ' ') {
365 /* This is the index of symbols in the file for compilers */
366 seek_sub_file(src_stream
, typed
->size
);
367 return (get_header_ar(src_stream
)); /* Return next header */
369 /* The number after the '/' indicates the offset in the ar data section
370 (saved in variable long_name) that conatains the real filename */
371 if (!ar_long_names
) {
372 error_msg("Cannot resolve long file name");
375 typed
->name
= xstrdup(ar_long_names
+ atoi(&ar
.formated
.name
[1]));
378 /* short filenames */
379 typed
->name
= xcalloc(1, 16);
380 strncpy(typed
->name
, ar
.formated
.name
, 16);
382 typed
->name
[strcspn(typed
->name
, " /")]='\0';
384 /* convert the rest of the now valid char header to its typed struct */
385 parse_mode(ar
.formated
.mode
, &typed
->mode
);
386 typed
->mtime
= atoi(ar
.formated
.date
);
387 typed
->uid
= atoi(ar
.formated
.uid
);
388 typed
->gid
= atoi(ar
.formated
.gid
);
393 void free_header_ar(file_header_t
*ar_entry
)
395 if (ar_entry
== NULL
) {
399 free(ar_entry
->name
);
400 free(ar_entry
->link_name
);
406 #ifdef L_get_header_cpio
408 file_header_t
*entry
;
410 struct hardlinks
*next
;
413 file_header_t
*get_header_cpio(FILE *src_stream
)
415 file_header_t
*cpio_entry
= NULL
;
416 char cpio_header
[110];
419 int major
, minor
, nlink
, inode
;
420 static struct hardlinks
*saved_hardlinks
= NULL
;
421 static int pending_hardlinks
= 0;
424 if (pending_hardlinks
) { /* Deal with any pending hardlinks */
425 struct hardlinks
*tmp
= saved_hardlinks
, *oldtmp
= NULL
;
427 if (tmp
->entry
->link_name
) { /* Found a hardlink ready to be extracted */
428 cpio_entry
= tmp
->entry
;
429 if (oldtmp
) oldtmp
->next
= tmp
->next
; /* Remove item from linked list */
430 else saved_hardlinks
= tmp
->next
;
437 pending_hardlinks
= 0; /* No more pending hardlinks, read next file entry */
440 /* There can be padding before archive header */
441 seek_sub_file(src_stream
, (4 - (archive_offset
% 4)) % 4);
442 if (fread(cpio_header
, 1, 110, src_stream
) == 110) {
443 archive_offset
+= 110;
444 if (strncmp(cpio_header
, "07070", 5) != 0) {
445 error_msg("Unsupported format or invalid magic");
448 switch (cpio_header
[5]) {
449 case '2': /* "crc" header format */
450 /* Doesnt do the crc check yet */
451 case '1': /* "newc" header format */
452 cpio_entry
= (file_header_t
*) xcalloc(1, sizeof(file_header_t
));
453 sscanf(cpio_header
, "%6c%8x%8x%8x%8x%8x%8lx%8lx%16c%8x%8x%8x%8c",
454 dummy
, &inode
, (unsigned int*)&cpio_entry
->mode
,
455 (unsigned int*)&cpio_entry
->uid
, (unsigned int*)&cpio_entry
->gid
,
456 &nlink
, &cpio_entry
->mtime
, (unsigned long*)&cpio_entry
->size
,
457 dummy
, &major
, &minor
, &namesize
, dummy
);
459 cpio_entry
->name
= (char *) xcalloc(1, namesize
);
460 fread(cpio_entry
->name
, 1, namesize
, src_stream
); /* Read in filename */
461 archive_offset
+= namesize
;
462 /* Skip padding before file contents */
463 seek_sub_file(src_stream
, (4 - (archive_offset
% 4)) % 4);
464 if (strcmp(cpio_entry
->name
, "TRAILER!!!") == 0) {
465 printf("%d blocks\n", (int) (archive_offset
% 512 ? (archive_offset
/ 512) + 1 : archive_offset
/ 512)); /* Always round up */
466 if (saved_hardlinks
) { /* Bummer - we still have unresolved hardlinks */
467 struct hardlinks
*tmp
= saved_hardlinks
, *oldtmp
= NULL
;
469 error_msg("%s not created: cannot resolve hardlink", tmp
->entry
->name
);
472 free (oldtmp
->entry
->name
);
473 free (oldtmp
->entry
);
476 saved_hardlinks
= NULL
;
477 pending_hardlinks
= 0;
482 if (S_ISLNK(cpio_entry
->mode
)) {
483 cpio_entry
->link_name
= (char *) xcalloc(1, cpio_entry
->size
+ 1);
484 fread(cpio_entry
->link_name
, 1, cpio_entry
->size
, src_stream
);
485 archive_offset
+= cpio_entry
->size
;
486 cpio_entry
->size
= 0; /* Stop possiable seeks in future */
488 if (nlink
> 1 && !S_ISDIR(cpio_entry
->mode
)) {
489 if (cpio_entry
->size
== 0) { /* Put file on a linked list for later */
490 struct hardlinks
*new = xmalloc(sizeof(struct hardlinks
));
491 new->next
= saved_hardlinks
;
493 new->entry
= cpio_entry
;
494 saved_hardlinks
= new;
495 return(get_header_cpio(src_stream
)); /* Recurse to next file */
496 } else { /* Found the file with data in */
497 struct hardlinks
*tmp
= saved_hardlinks
;
498 pending_hardlinks
= 1;
500 if (tmp
->inode
== inode
) {
501 tmp
->entry
->link_name
= xstrdup(cpio_entry
->name
);
506 if (nlink
> 1) error_msg("error resolving hardlink: did you create the archive with GNU cpio 2.0-2.2?");
509 cpio_entry
->device
= (major
<< 8) | minor
;
512 error_msg("Unsupported format");
515 if (ferror(src_stream
) || feof(src_stream
)) {
516 perror_msg("Stream error");
524 #ifdef L_get_header_tar
525 file_header_t
*get_header_tar(FILE *tar_stream
)
529 unsigned char raw
[512];
531 char name
[100]; /* 0-99 */
532 char mode
[8]; /* 100-107 */
533 char uid
[8]; /* 108-115 */
534 char gid
[8]; /* 116-123 */
535 char size
[12]; /* 124-135 */
536 char mtime
[12]; /* 136-147 */
537 char chksum
[8]; /* 148-155 */
538 char typeflag
; /* 156-156 */
539 char linkname
[100]; /* 157-256 */
540 char magic
[6]; /* 257-262 */
541 char version
[2]; /* 263-264 */
542 char uname
[32]; /* 265-296 */
543 char gname
[32]; /* 297-328 */
544 char devmajor
[8]; /* 329-336 */
545 char devminor
[8]; /* 337-344 */
546 char prefix
[155]; /* 345-499 */
547 char padding
[12]; /* 500-512 */
550 file_header_t
*tar_entry
= NULL
;
554 if (archive_offset
% 512 != 0) {
555 seek_sub_file(tar_stream
, 512 - (archive_offset
% 512));
558 if (fread(tar
.raw
, 1, 512, tar_stream
) != 512) {
559 /* Unfortunatly its common for tar files to have all sorts of
560 * trailing garbage, fail silently */
561 // error_msg("Couldnt read header");
564 archive_offset
+= 512;
566 /* Check header has valid magic, unfortunately some tar files
567 * have empty (0'ed) tar entries at the end, which will
568 * cause this to fail, so fail silently for now
570 if (strncmp(tar
.formated
.magic
, "ustar", 5) != 0) {
571 #ifdef CONFIG_FEATURE_TAR_OLDGNU_COMPATABILITY
572 if (strncmp(tar
.formated
.magic
, "\0\0\0\0\0", 5) != 0)
577 /* Do checksum on headers */
578 for (i
= 0; i
< 148 ; i
++) {
582 for (i
= 156; i
< 512 ; i
++) {
585 if (sum
!= strtol(tar
.formated
.chksum
, NULL
, 8)) {
586 if ( strtol(tar
.formated
.chksum
,NULL
,8) != 0 )
587 error_msg("Invalid tar header checksum");
591 /* convert to type'ed variables */
592 tar_entry
= xcalloc(1, sizeof(file_header_t
));
594 #ifdef CONFIG_FEATURE_TAR_GNU_EXTENSIONS
596 tar_entry
->name
= longname
;
600 tar_entry
->name
= linkname
;
604 if (tar
.formated
.prefix
[0] == 0) {
605 tar_entry
->name
= strdup(tar
.formated
.name
);
607 tar_entry
->name
= concat_path_file(tar
.formated
.prefix
, tar
.formated
.name
);
610 // tar_entry->name = xstrdup(tar.formated.name);
613 parse_mode(tar.formated.mode, &tar_entry->mode);
615 tar_entry
->mode
= 07777 & strtol(tar
.formated
.mode
, NULL
, 8);
617 tar_entry
->uid
= strtol(tar
.formated
.uid
, NULL
, 8);
618 tar_entry
->gid
= strtol(tar
.formated
.gid
, NULL
, 8);
619 tar_entry
->size
= strtol(tar
.formated
.size
, NULL
, 8);
620 tar_entry
->mtime
= strtol(tar
.formated
.mtime
, NULL
, 8);
621 tar_entry
->link_name
= strlen(tar
.formated
.linkname
) ?
622 xstrdup(tar
.formated
.linkname
) : NULL
;
623 tar_entry
->device
= (strtol(tar
.formated
.devmajor
, NULL
, 8) << 8) +
624 strtol(tar
.formated
.devminor
, NULL
, 8);
626 /* Fix mode, used by the old format */
627 switch (tar
.formated
.typeflag
) {
628 /* hard links are detected as regular files with 0 size and a link name */
630 tar_entry
->mode
|= S_IFREG
;
635 # ifdef CONFIG_FEATURE_TAR_OLDGNU_COMPATABILITY
636 if (last_char_is(tar_entry
->name
, '/')) {
637 tar_entry
->mode
|= S_IFDIR
;
640 tar_entry
->mode
|= S_IFREG
;
643 tar_entry
->mode
|= S_IFLNK
;
646 tar_entry
->mode
|= S_IFCHR
;
649 tar_entry
->mode
|= S_IFBLK
;
652 tar_entry
->mode
|= S_IFDIR
;
655 tar_entry
->mode
|= S_IFIFO
;
657 # ifdef CONFIG_FEATURE_TAR_GNU_EXTENSIONS
659 longname
= xmalloc(tar_entry
->size
+ 1);
660 if(fread(longname
, tar_entry
->size
, 1, tar_stream
) != 1)
662 longname
[tar_entry
->size
] = '\0';
663 archive_offset
+= tar_entry
->size
;
665 return(get_header_tar(tar_stream
));
668 linkname
= xmalloc(tar_entry
->size
+ 1);
669 if(fread(linkname
, tar_entry
->size
, 1, tar_stream
) != 1)
671 linkname
[tar_entry
->size
] = '\0';
672 archive_offset
+= tar_entry
->size
;
674 tar_entry
->name
= linkname
;
675 return(get_header_tar(tar_stream
));
682 perror_msg("Ignoring GNU extension type %c", tar
.formated
.typeflag
);
685 perror_msg("Unknown typeflag: 0x%x", tar
.formated
.typeflag
);
693 void free_header_tar(file_header_t
*tar_entry
)
695 if (tar_entry
== NULL
) {
699 free(tar_entry
->name
);
700 free(tar_entry
->link_name
);
708 char *deb_extract(const char *package_filename
, FILE *out_stream
,
709 const int extract_function
, const char *prefix
, const char *filename
)
712 FILE *uncompressed_stream
= NULL
;
713 file_header_t
*ar_header
= NULL
;
714 char **file_list
= NULL
;
715 char *output_buffer
= NULL
;
716 char *ared_file
= NULL
;
720 if (filename
!= NULL
) {
721 file_list
= xmalloc(sizeof(char *) * 2);
722 file_list
[0] = xstrdup(filename
);
726 if (extract_function
& extract_control_tar_gz
) {
727 ared_file
= xstrdup("control.tar.gz");
729 else if (extract_function
& extract_data_tar_gz
) {
730 ared_file
= xstrdup("data.tar.gz");
732 fprintf(stderr
, "no file specified to extract -- extract_function=%x\n", extract_function
);
736 /* open the debian package to be worked on */
737 deb_stream
= wfopen(package_filename
, "r");
738 if (deb_stream
== NULL
) {
741 /* set the buffer size */
742 setvbuf(deb_stream
, NULL
, _IOFBF
, 0x8000);
745 fread(ar_magic
, 1, 8, deb_stream
);
746 /*fprintf(stderr, "deb_extract ar_magic=%08x\n", *(long *)ar_magic);*/
747 if (strncmp(ar_magic
,"!<arch>",7) == 0) {
750 while ((ar_header
= get_header_ar(deb_stream
)) != NULL
) {
751 if (strcmp(ared_file
, ar_header
->name
) == 0) {
752 /* open a stream of decompressed data */
753 uncompressed_stream
= gz_open(deb_stream
, &gunzip_pid
);
755 output_buffer
= unarchive(uncompressed_stream
, out_stream
, get_header_tar
, free_header_tar
, extract_function
, prefix
, file_list
);
757 seek_sub_file(deb_stream
, ar_header
->size
);
759 gz_close(gunzip_pid
);
761 fclose(uncompressed_stream
);
763 return(output_buffer
);
764 } else if (strncmp(ar_magic
, "\037\213", 2) == 0) {
765 /* it's a gz file, let's assume it's an opkg */
766 int unzipped_opkg_pid
;
767 FILE *unzipped_opkg_stream
;
768 file_header_t
*tar_header
;
770 fseek(deb_stream
, 0, SEEK_SET
);
771 unzipped_opkg_stream
= gz_open(deb_stream
, &unzipped_opkg_pid
);
773 /*fprintf(stderr, __FUNCTION__ ": processing opkg %s -- ared_file=%s\n", package_filename, ared_file);*/
774 /* walk through outer tar file to find ared_file */
775 while ((tar_header
= get_header_tar(unzipped_opkg_stream
)) != NULL
) {
777 if (strncmp(tar_header
->name
, "./", 2) == 0)
779 if (strcmp(ared_file
, tar_header
->name
+name_offset
) == 0) {
780 /* open a stream of decompressed data */
781 uncompressed_stream
= gz_open(unzipped_opkg_stream
, &gunzip_pid
);
783 /*fprintf(stderr, __FUNCTION__ ":%d: here -- found file\n", __LINE__);*/
784 output_buffer
= unarchive(uncompressed_stream
,
791 /*fprintf(stderr, __FUNCTION__ ":%d: unarchive complete\n", __LINE__);*/
792 free_header_tar(tar_header
);
793 gz_close(gunzip_pid
);
794 fclose(uncompressed_stream
);
797 seek_sub_file(unzipped_opkg_stream
, tar_header
->size
);
798 free_header_tar(tar_header
);
800 gz_close(unzipped_opkg_pid
);
801 fclose(unzipped_opkg_stream
);
804 /*fprintf(stderr, __FUNCTION__ ":%d: done\n", __LINE__);*/
805 return output_buffer
;
807 error_msg_and_die("invalid magic");