2 * Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
3 * Author: Jonas Gastal <jgastal@profusion.mobi>
4 * Copyright (c) 2011-2012 Michihiro NAKAJIMA
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 #include "archive_platform.h"
30 __FBSDID("$FreeBSD: head/lib/libarchive/archive_write_set_format_gnu_tar.c 191579 2009-04-27 18:35:03Z gastal $");
45 #include "archive_entry.h"
46 #include "archive_entry_locale.h"
47 #include "archive_private.h"
48 #include "archive_write_private.h"
51 uint64_t entry_bytes_remaining;
52 uint64_t entry_padding;
53 const char * linkname;
54 size_t linkname_length;
55 const char * pathname;
56 size_t pathname_length;
61 struct archive_string_conv *opt_sconv;
62 struct archive_string_conv *sconv_default;
63 int init_default_conversion;
67 * Define structure of GNU tar header.
69 #define GNUTAR_name_offset 0
70 #define GNUTAR_name_size 100
71 #define GNUTAR_mode_offset 100
72 #define GNUTAR_mode_size 7
73 #define GNUTAR_mode_max_size 8
74 #define GNUTAR_uid_offset 108
75 #define GNUTAR_uid_size 7
76 #define GNUTAR_uid_max_size 8
77 #define GNUTAR_gid_offset 116
78 #define GNUTAR_gid_size 7
79 #define GNUTAR_gid_max_size 8
80 #define GNUTAR_size_offset 124
81 #define GNUTAR_size_size 11
82 #define GNUTAR_size_max_size 12
83 #define GNUTAR_mtime_offset 136
84 #define GNUTAR_mtime_size 11
85 #define GNUTAR_mtime_max_size 11
86 #define GNUTAR_checksum_offset 148
87 #define GNUTAR_checksum_size 8
88 #define GNUTAR_typeflag_offset 156
89 #define GNUTAR_typeflag_size 1
90 #define GNUTAR_linkname_offset 157
91 #define GNUTAR_linkname_size 100
92 #define GNUTAR_magic_offset 257
93 #define GNUTAR_magic_size 6
94 #define GNUTAR_version_offset 263
95 #define GNUTAR_version_size 2
96 #define GNUTAR_uname_offset 265
97 #define GNUTAR_uname_size 32
98 #define GNUTAR_gname_offset 297
99 #define GNUTAR_gname_size 32
100 #define GNUTAR_rdevmajor_offset 329
101 #define GNUTAR_rdevmajor_size 6
102 #define GNUTAR_rdevmajor_max_size 8
103 #define GNUTAR_rdevminor_offset 337
104 #define GNUTAR_rdevminor_size 6
105 #define GNUTAR_rdevminor_max_size 8
108 * A filled-in copy of the header for initialization.
110 static const char template_header[] = {
111 /* name: 100 bytes */
112 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
113 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
114 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
116 /* Mode, null termination: 8 bytes */
117 '0','0','0','0','0','0', '0','\0',
118 /* uid, null termination: 8 bytes */
119 '0','0','0','0','0','0', '0','\0',
120 /* gid, null termination: 8 bytes */
121 '0','0','0','0','0','0', '0','\0',
122 /* size, space termation: 12 bytes */
123 '0','0','0','0','0','0','0','0','0','0','0', '\0',
124 /* mtime, space termation: 12 bytes */
125 '0','0','0','0','0','0','0','0','0','0','0', '\0',
126 /* Initial checksum value: 8 spaces */
127 ' ',' ',' ',' ',' ',' ',' ',' ',
128 /* Typeflag: 1 byte */
129 '0', /* '0' = regular file */
130 /* Linkname: 100 bytes */
131 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
132 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
133 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
136 'u','s','t','a','r',' ', ' ','\0',
137 /* Uname: 32 bytes */
138 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
139 /* Gname: 32 bytes */
140 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
141 /* rdevmajor + null padding: 8 bytes */
142 '\0','\0','\0','\0','\0','\0', '\0','\0',
143 /* rdevminor + null padding: 8 bytes */
144 '\0','\0','\0','\0','\0','\0', '\0','\0',
145 /* Padding: 167 bytes */
146 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
147 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
148 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
149 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
150 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
154 static int archive_write_gnutar_options(struct archive_write *,
155 const char *, const char *);
156 static int archive_format_gnutar_header(struct archive_write *, char h[512],
157 struct archive_entry *, int tartype);
158 static int archive_write_gnutar_header(struct archive_write *,
159 struct archive_entry *entry);
160 static ssize_t archive_write_gnutar_data(struct archive_write *a, const void *buff,
162 static int archive_write_gnutar_free(struct archive_write *);
163 static int archive_write_gnutar_close(struct archive_write *);
164 static int archive_write_gnutar_finish_entry(struct archive_write *);
165 static int format_256(int64_t, char *, int);
166 static int format_number(int64_t, char *, int size, int maxsize);
167 static int format_octal(int64_t, char *, int);
170 * Set output format to 'GNU tar' format.
173 archive_write_set_format_gnutar(struct archive *_a)
175 struct archive_write *a = (struct archive_write *)_a;
176 struct gnutar *gnutar;
178 gnutar = (struct gnutar *)calloc(1, sizeof(*gnutar));
179 if (gnutar == NULL) {
180 archive_set_error(&a->archive, ENOMEM,
181 "Can't allocate gnutar data");
182 return (ARCHIVE_FATAL);
184 a->format_data = gnutar;
185 a->format_name = "gnutar";
186 a->format_options = archive_write_gnutar_options;
187 a->format_write_header = archive_write_gnutar_header;
188 a->format_write_data = archive_write_gnutar_data;
189 a->format_close = archive_write_gnutar_close;
190 a->format_free = archive_write_gnutar_free;
191 a->format_finish_entry = archive_write_gnutar_finish_entry;
192 a->archive.archive_format = ARCHIVE_FORMAT_TAR_GNUTAR;
193 a->archive.archive_format_name = "GNU tar";
198 archive_write_gnutar_options(struct archive_write *a, const char *key,
201 struct gnutar *gnutar = (struct gnutar *)a->format_data;
202 int ret = ARCHIVE_FAILED;
204 if (strcmp(key, "hdrcharset") == 0) {
205 if (val == NULL || val[0] == 0)
206 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
207 "%s: hdrcharset option needs a character-set name",
210 gnutar->opt_sconv = archive_string_conversion_to_charset(
211 &a->archive, val, 0);
212 if (gnutar->opt_sconv != NULL)
220 /* Note: The "warn" return is just to inform the options
221 * supervisor that we didn't handle it. It will generate
222 * a suitable error if no one used this option. */
223 return (ARCHIVE_WARN);
227 archive_write_gnutar_close(struct archive_write *a)
229 return (__archive_write_nulls(a, 512*2));
233 archive_write_gnutar_free(struct archive_write *a)
235 struct gnutar *gnutar;
237 gnutar = (struct gnutar *)a->format_data;
239 a->format_data = NULL;
244 archive_write_gnutar_finish_entry(struct archive_write *a)
246 struct gnutar *gnutar;
249 gnutar = (struct gnutar *)a->format_data;
250 ret = __archive_write_nulls(a, (size_t)
251 (gnutar->entry_bytes_remaining + gnutar->entry_padding));
252 gnutar->entry_bytes_remaining = gnutar->entry_padding = 0;
257 archive_write_gnutar_data(struct archive_write *a, const void *buff, size_t s)
259 struct gnutar *gnutar;
262 gnutar = (struct gnutar *)a->format_data;
263 if (s > gnutar->entry_bytes_remaining)
264 s = (size_t)gnutar->entry_bytes_remaining;
265 ret = __archive_write_output(a, buff, s);
266 gnutar->entry_bytes_remaining -= s;
267 if (ret != ARCHIVE_OK)
273 archive_write_gnutar_header(struct archive_write *a,
274 struct archive_entry *entry)
277 int r, ret, ret2 = ARCHIVE_OK;
279 struct gnutar *gnutar;
280 struct archive_string_conv *sconv;
281 struct archive_entry *entry_main;
283 gnutar = (struct gnutar *)a->format_data;
285 /* Setup default string conversion. */
286 if (gnutar->opt_sconv == NULL) {
287 if (!gnutar->init_default_conversion) {
288 gnutar->sconv_default =
289 archive_string_default_conversion_for_write(
291 gnutar->init_default_conversion = 1;
293 sconv = gnutar->sconv_default;
295 sconv = gnutar->opt_sconv;
297 /* Only regular files (not hardlinks) have data. */
298 if (archive_entry_hardlink(entry) != NULL ||
299 archive_entry_symlink(entry) != NULL ||
300 !(archive_entry_filetype(entry) == AE_IFREG))
301 archive_entry_set_size(entry, 0);
303 if (AE_IFDIR == archive_entry_filetype(entry)) {
307 * Ensure a trailing '/'. Modify the entry so
308 * the client sees the change.
310 #if defined(_WIN32) && !defined(__CYGWIN__)
313 wp = archive_entry_pathname_w(entry);
314 if (wp != NULL && wp[wcslen(wp) -1] != L'/') {
315 struct archive_wstring ws;
317 archive_string_init(&ws);
318 path_length = wcslen(wp);
319 if (archive_wstring_ensure(&ws,
320 path_length + 2) == NULL) {
321 archive_set_error(&a->archive, ENOMEM,
322 "Can't allocate ustar data");
323 archive_wstring_free(&ws);
324 return(ARCHIVE_FATAL);
326 /* Should we keep '\' ? */
327 if (wp[path_length -1] == L'\\')
329 archive_wstrncpy(&ws, wp, path_length);
330 archive_wstrappend_wchar(&ws, L'/');
331 archive_entry_copy_pathname_w(entry, ws.s);
332 archive_wstring_free(&ws);
336 p = archive_entry_pathname(entry);
338 * On Windows, this is a backup operation just in
339 * case getting WCS failed. On POSIX, this is a
342 if (p != NULL && p[strlen(p) - 1] != '/') {
343 struct archive_string as;
345 archive_string_init(&as);
346 path_length = strlen(p);
347 if (archive_string_ensure(&as,
348 path_length + 2) == NULL) {
349 archive_set_error(&a->archive, ENOMEM,
350 "Can't allocate ustar data");
351 archive_string_free(&as);
352 return(ARCHIVE_FATAL);
354 #if defined(_WIN32) && !defined(__CYGWIN__)
355 /* NOTE: This might break the pathname
356 * if the current code page is CP932 and
357 * the pathname includes a character '\'
358 * as a part of its multibyte pathname. */
359 if (p[strlen(p) -1] == '\\')
363 archive_strncpy(&as, p, path_length);
364 archive_strappend_char(&as, '/');
365 archive_entry_copy_pathname(entry, as.s);
366 archive_string_free(&as);
370 #if defined(_WIN32) && !defined(__CYGWIN__)
371 /* Make sure the path separators in pahtname, hardlink and symlink
372 * are all slash '/', not the Windows path separator '\'. */
373 entry_main = __la_win_entry_in_posix_pathseparator(entry);
374 if (entry_main == NULL) {
375 archive_set_error(&a->archive, ENOMEM,
376 "Can't allocate ustar data");
377 return(ARCHIVE_FATAL);
379 if (entry != entry_main)
386 r = archive_entry_pathname_l(entry, &(gnutar->pathname),
387 &(gnutar->pathname_length), sconv);
389 if (errno == ENOMEM) {
390 archive_set_error(&a->archive, ENOMEM,
391 "Can't allocate memory for Pathame");
393 goto exit_write_header;
395 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
396 "Can't translate pathname '%s' to %s",
397 archive_entry_pathname(entry),
398 archive_string_conversion_charset_name(sconv));
401 r = archive_entry_uname_l(entry, &(gnutar->uname),
402 &(gnutar->uname_length), sconv);
404 if (errno == ENOMEM) {
405 archive_set_error(&a->archive, ENOMEM,
406 "Can't allocate memory for Uname");
408 goto exit_write_header;
410 archive_set_error(&a->archive,
411 ARCHIVE_ERRNO_FILE_FORMAT,
412 "Can't translate uname '%s' to %s",
413 archive_entry_uname(entry),
414 archive_string_conversion_charset_name(sconv));
417 r = archive_entry_gname_l(entry, &(gnutar->gname),
418 &(gnutar->gname_length), sconv);
420 if (errno == ENOMEM) {
421 archive_set_error(&a->archive, ENOMEM,
422 "Can't allocate memory for Gname");
424 goto exit_write_header;
426 archive_set_error(&a->archive,
427 ARCHIVE_ERRNO_FILE_FORMAT,
428 "Can't translate gname '%s' to %s",
429 archive_entry_gname(entry),
430 archive_string_conversion_charset_name(sconv));
434 /* If linkname is longer than 100 chars we need to add a 'K' header. */
435 r = archive_entry_hardlink_l(entry, &(gnutar->linkname),
436 &(gnutar->linkname_length), sconv);
438 if (errno == ENOMEM) {
439 archive_set_error(&a->archive, ENOMEM,
440 "Can't allocate memory for Linkname");
442 goto exit_write_header;
444 archive_set_error(&a->archive,
445 ARCHIVE_ERRNO_FILE_FORMAT,
446 "Can't translate linkname '%s' to %s",
447 archive_entry_hardlink(entry),
448 archive_string_conversion_charset_name(sconv));
451 if (gnutar->linkname_length == 0) {
452 r = archive_entry_symlink_l(entry, &(gnutar->linkname),
453 &(gnutar->linkname_length), sconv);
455 if (errno == ENOMEM) {
456 archive_set_error(&a->archive, ENOMEM,
457 "Can't allocate memory for Linkname");
459 goto exit_write_header;
461 archive_set_error(&a->archive,
462 ARCHIVE_ERRNO_FILE_FORMAT,
463 "Can't translate linkname '%s' to %s",
464 archive_entry_hardlink(entry),
465 archive_string_conversion_charset_name(sconv));
469 if (gnutar->linkname_length > GNUTAR_linkname_size) {
470 size_t todo = gnutar->linkname_length;
471 struct archive_entry *temp = archive_entry_new2(&a->archive);
473 /* Uname/gname here don't really matter since no one reads them;
474 * these are the values that GNU tar happens to use on FreeBSD. */
475 archive_entry_set_uname(temp, "root");
476 archive_entry_set_gname(temp, "wheel");
478 archive_entry_set_pathname(temp, "././@LongLink");
479 archive_entry_set_size(temp, gnutar->linkname_length + 1);
480 ret = archive_format_gnutar_header(a, buff, temp, 'K');
481 if (ret < ARCHIVE_WARN)
482 goto exit_write_header;
483 ret = __archive_write_output(a, buff, 512);
484 if(ret < ARCHIVE_WARN)
485 goto exit_write_header;
486 archive_entry_free(temp);
487 /* Write as many 512 bytes blocks as needed to write full name. */
488 ret = __archive_write_output(a, gnutar->linkname, todo);
489 if(ret < ARCHIVE_WARN)
490 goto exit_write_header;
491 ret = __archive_write_nulls(a, 0x1ff & (-(ssize_t)todo));
492 if (ret < ARCHIVE_WARN)
493 goto exit_write_header;
496 /* If pathname is longer than 100 chars we need to add an 'L' header. */
497 if (gnutar->pathname_length > GNUTAR_name_size) {
498 const char *pathname = gnutar->pathname;
499 size_t todo = gnutar->pathname_length;
500 struct archive_entry *temp = archive_entry_new2(&a->archive);
502 /* Uname/gname here don't really matter since no one reads them;
503 * these are the values that GNU tar happens to use on FreeBSD. */
504 archive_entry_set_uname(temp, "root");
505 archive_entry_set_gname(temp, "wheel");
507 archive_entry_set_pathname(temp, "././@LongLink");
508 archive_entry_set_size(temp, gnutar->pathname_length + 1);
509 ret = archive_format_gnutar_header(a, buff, temp, 'L');
510 if (ret < ARCHIVE_WARN)
511 goto exit_write_header;
512 ret = __archive_write_output(a, buff, 512);
513 if(ret < ARCHIVE_WARN)
514 goto exit_write_header;
515 archive_entry_free(temp);
516 /* Write as many 512 bytes blocks as needed to write full name. */
517 ret = __archive_write_output(a, pathname, todo);
518 if(ret < ARCHIVE_WARN)
519 goto exit_write_header;
520 ret = __archive_write_nulls(a, 0x1ff & (-(ssize_t)todo));
521 if (ret < ARCHIVE_WARN)
522 goto exit_write_header;
525 if (archive_entry_hardlink(entry) != NULL) {
528 switch (archive_entry_filetype(entry)) {
529 case AE_IFREG: tartype = '0' ; break;
530 case AE_IFLNK: tartype = '2' ; break;
531 case AE_IFCHR: tartype = '3' ; break;
532 case AE_IFBLK: tartype = '4' ; break;
533 case AE_IFDIR: tartype = '5' ; break;
534 case AE_IFIFO: tartype = '6' ; break;
536 archive_set_error(&a->archive,
537 ARCHIVE_ERRNO_FILE_FORMAT,
538 "tar format cannot archive socket");
539 ret = ARCHIVE_FAILED;
540 goto exit_write_header;
542 archive_set_error(&a->archive,
543 ARCHIVE_ERRNO_FILE_FORMAT,
544 "tar format cannot archive this (mode=0%lo)",
545 (unsigned long)archive_entry_mode(entry));
546 ret = ARCHIVE_FAILED;
547 goto exit_write_header;
550 ret = archive_format_gnutar_header(a, buff, entry, tartype);
551 if (ret < ARCHIVE_WARN)
552 goto exit_write_header;
555 ret2 = __archive_write_output(a, buff, 512);
556 if (ret2 < ARCHIVE_WARN) {
558 goto exit_write_header;
563 gnutar->entry_bytes_remaining = archive_entry_size(entry);
564 gnutar->entry_padding = 0x1ff & (-(int64_t)gnutar->entry_bytes_remaining);
567 archive_entry_free(entry_main);
572 archive_format_gnutar_header(struct archive_write *a, char h[512],
573 struct archive_entry *entry, int tartype)
575 unsigned int checksum;
579 struct gnutar *gnutar;
581 gnutar = (struct gnutar *)a->format_data;
586 * The "template header" already includes the signature,
587 * various end-of-field markers, and other required elements.
589 memcpy(h, &template_header, 512);
592 * Because the block is already null-filled, and strings
593 * are allowed to exactly fill their destination (without null),
594 * I use memcpy(dest, src, strlen()) here a lot to copy strings.
597 if (tartype == 'K' || tartype == 'L') {
598 p = archive_entry_pathname(entry);
599 copy_length = strlen(p);
601 p = gnutar->pathname;
602 copy_length = gnutar->pathname_length;
604 if (copy_length > GNUTAR_name_size)
605 copy_length = GNUTAR_name_size;
606 memcpy(h + GNUTAR_name_offset, p, copy_length);
608 if ((copy_length = gnutar->linkname_length) > 0) {
609 if (copy_length > GNUTAR_linkname_size)
610 copy_length = GNUTAR_linkname_size;
611 memcpy(h + GNUTAR_linkname_offset, gnutar->linkname,
615 /* TODO: How does GNU tar handle unames longer than GNUTAR_uname_size? */
616 if (tartype == 'K' || tartype == 'L') {
617 p = archive_entry_uname(entry);
618 copy_length = strlen(p);
621 copy_length = gnutar->uname_length;
623 if (copy_length > 0) {
624 if (copy_length > GNUTAR_uname_size)
625 copy_length = GNUTAR_uname_size;
626 memcpy(h + GNUTAR_uname_offset, p, copy_length);
629 /* TODO: How does GNU tar handle gnames longer than GNUTAR_gname_size? */
630 if (tartype == 'K' || tartype == 'L') {
631 p = archive_entry_gname(entry);
632 copy_length = strlen(p);
635 copy_length = gnutar->gname_length;
637 if (copy_length > 0) {
638 if (strlen(p) > GNUTAR_gname_size)
639 copy_length = GNUTAR_gname_size;
640 memcpy(h + GNUTAR_gname_offset, p, copy_length);
643 /* By truncating the mode here, we ensure it always fits. */
644 format_octal(archive_entry_mode(entry) & 07777,
645 h + GNUTAR_mode_offset, GNUTAR_mode_size);
647 /* TODO: How does GNU tar handle large UIDs? */
648 if (format_octal(archive_entry_uid(entry),
649 h + GNUTAR_uid_offset, GNUTAR_uid_size)) {
650 archive_set_error(&a->archive, ERANGE,
651 "Numeric user ID %jd too large",
652 (intmax_t)archive_entry_uid(entry));
653 ret = ARCHIVE_FAILED;
656 /* TODO: How does GNU tar handle large GIDs? */
657 if (format_octal(archive_entry_gid(entry),
658 h + GNUTAR_gid_offset, GNUTAR_gid_size)) {
659 archive_set_error(&a->archive, ERANGE,
660 "Numeric group ID %jd too large",
661 (intmax_t)archive_entry_gid(entry));
662 ret = ARCHIVE_FAILED;
665 /* GNU tar supports base-256 here, so should never overflow. */
666 if (format_number(archive_entry_size(entry), h + GNUTAR_size_offset,
667 GNUTAR_size_size, GNUTAR_size_max_size)) {
668 archive_set_error(&a->archive, ERANGE,
669 "File size out of range");
670 ret = ARCHIVE_FAILED;
673 /* Shouldn't overflow before 2106, since mtime field is 33 bits. */
674 format_octal(archive_entry_mtime(entry),
675 h + GNUTAR_mtime_offset, GNUTAR_mtime_size);
677 if (archive_entry_filetype(entry) == AE_IFBLK
678 || archive_entry_filetype(entry) == AE_IFCHR) {
679 if (format_octal(archive_entry_rdevmajor(entry),
680 h + GNUTAR_rdevmajor_offset,
681 GNUTAR_rdevmajor_size)) {
682 archive_set_error(&a->archive, ERANGE,
683 "Major device number too large");
684 ret = ARCHIVE_FAILED;
687 if (format_octal(archive_entry_rdevminor(entry),
688 h + GNUTAR_rdevminor_offset,
689 GNUTAR_rdevminor_size)) {
690 archive_set_error(&a->archive, ERANGE,
691 "Minor device number too large");
692 ret = ARCHIVE_FAILED;
696 h[GNUTAR_typeflag_offset] = tartype;
699 for (i = 0; i < 512; i++)
700 checksum += 255 & (unsigned int)h[i];
701 h[GNUTAR_checksum_offset + 6] = '\0'; /* Can't be pre-set in the template. */
702 /* h[GNUTAR_checksum_offset + 7] = ' '; */ /* This is pre-set in the template. */
703 format_octal(checksum, h + GNUTAR_checksum_offset, 6);
708 * Format a number into a field, falling back to base-256 if necessary.
711 format_number(int64_t v, char *p, int s, int maxsize)
713 int64_t limit = ((int64_t)1 << (s*3));
716 return (format_octal(v, p, s));
717 return (format_256(v, p, maxsize));
721 * Format a number into the specified field using base-256.
724 format_256(int64_t v, char *p, int s)
728 *--p = (char)(v & 0xff);
731 *p |= 0x80; /* Set the base-256 marker bit. */
736 * Format a number into the specified field using octal.
739 format_octal(int64_t v, char *p, int s)
743 /* Octal values can't be negative, so use 0. */
747 p += s; /* Start at the end and work backwards. */
749 *--p = (char)('0' + (v & 7));
756 /* If it overflowed, fill field with max value. */