1 /* List a tar archive, with support routines for reading a tar archive.
3 Copyright (C) 1988, 1992, 1993, 1994, 1996, 1997, 1998, 1999, 2000,
4 2001, 2003, 2004, 2005 Free Software Foundation, Inc.
6 Written by John Gilmore, on 1985-08-26.
8 This program is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published by the
10 Free Software Foundation; either version 2, or (at your option) any later
13 This program is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
16 Public License for more details.
18 You should have received a copy of the GNU General Public License along
19 with this program; if not, write to the Free Software Foundation, Inc.,
20 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
22 /* Define to non-zero for forcing old ctime format instead of ISO format. */
30 #define max(a, b) ((a) < (b) ? (b) : (a))
32 union block
*current_header
; /* points to current archive header */
33 enum archive_format current_format
; /* recognized format */
34 union block
*recent_long_name
; /* recent long name header and contents */
35 union block
*recent_long_link
; /* likewise, for long link */
36 size_t recent_long_name_blocks
; /* number of blocks in recent_long_name */
37 size_t recent_long_link_blocks
; /* likewise, for long link */
39 static uintmax_t from_header (const char *, size_t, const char *,
40 uintmax_t, uintmax_t, bool);
42 /* Base 64 digits; see Internet RFC 2045 Table 1. */
43 static char const base_64_digits
[64] =
45 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M',
46 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
47 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm',
48 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
49 '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '+', '/'
52 /* Table of base-64 digit values indexed by unsigned chars.
53 The value is 64 for unsigned chars that are not base-64 digits. */
54 static char base64_map
[UCHAR_MAX
+ 1];
60 memset (base64_map
, 64, sizeof base64_map
);
61 for (i
= 0; i
< 64; i
++)
62 base64_map
[(int) base_64_digits
[i
]] = i
;
65 /* Main loop for reading an archive. */
67 read_and (void (*do_something
) (void))
69 enum read_header status
= HEADER_STILL_UNREAD
;
70 enum read_header prev_status
;
75 open_archive (ACCESS_READ
);
79 tar_stat_destroy (¤t_stat_info
);
80 xheader_destroy (&extended_header
);
82 status
= read_header (false);
85 case HEADER_STILL_UNREAD
:
86 case HEADER_SUCCESS_EXTENDED
:
91 /* Valid header. We should decode next field (mode) first.
92 Ensure incoming names are null terminated. */
94 if (! name_match (current_stat_info
.file_name
)
95 || (NEWER_OPTION_INITIALIZED (newer_mtime_option
)
96 /* FIXME: We get mtime now, and again later; this causes
97 duplicate diagnostics if header.mtime is bogus. */
98 && ((current_stat_info
.stat
.st_mtime
99 = TIME_FROM_HEADER (current_header
->header
.mtime
)),
101 /* FIXME: Grab fractional time stamps from
103 current_stat_info
.stat
.st_mtim
.ST_MTIM_NSEC
= 0,
105 OLDER_STAT_TIME (current_stat_info
.stat
, m
)))
106 || excluded_name (current_stat_info
.file_name
))
108 switch (current_header
->header
.typeflag
)
111 case GNUTYPE_MULTIVOL
:
116 if (show_omitted_dirs_option
)
117 WARN ((0, 0, _("%s: Omitting"),
118 quotearg_colon (current_stat_info
.file_name
)));
121 decode_header (current_header
,
122 ¤t_stat_info
, ¤t_format
, 0);
131 case HEADER_ZERO_BLOCK
:
132 if (block_number_option
)
134 char buf
[UINTMAX_STRSIZE_BOUND
];
135 fprintf (stdlis
, _("block %s: ** Block of NULs **\n"),
136 STRINGIFY_BIGINT (current_block_ordinal (), buf
));
139 set_next_block_after (current_header
);
141 if (!ignore_zeros_option
)
143 char buf
[UINTMAX_STRSIZE_BOUND
];
145 status
= read_header (false);
146 if (status
== HEADER_ZERO_BLOCK
)
148 WARN ((0, 0, _("A lone zero block at %s"),
149 STRINGIFY_BIGINT (current_block_ordinal (), buf
)));
152 status
= prev_status
;
155 case HEADER_END_OF_FILE
:
156 if (block_number_option
)
158 char buf
[UINTMAX_STRSIZE_BOUND
];
159 fprintf (stdlis
, _("block %s: ** End of File **\n"),
160 STRINGIFY_BIGINT (current_block_ordinal (), buf
));
165 /* If the previous header was good, tell them that we are
166 skipping bad ones. */
167 set_next_block_after (current_header
);
170 case HEADER_STILL_UNREAD
:
171 ERROR ((0, 0, _("This does not look like a tar archive")));
174 case HEADER_ZERO_BLOCK
:
176 if (block_number_option
)
178 char buf
[UINTMAX_STRSIZE_BOUND
];
179 off_t block_ordinal
= current_block_ordinal ();
180 block_ordinal
-= recent_long_name_blocks
;
181 block_ordinal
-= recent_long_link_blocks
;
182 fprintf (stdlis
, _("block %s: "),
183 STRINGIFY_BIGINT (block_ordinal
, buf
));
185 ERROR ((0, 0, _("Skipping to next header")));
188 case HEADER_END_OF_FILE
:
190 /* We are in the middle of a cascade of errors. */
193 case HEADER_SUCCESS_EXTENDED
:
200 while (!all_names_found (¤t_stat_info
));
203 names_notfound (); /* print names not found */
206 /* Print a header block, based on tar options. */
210 /* Print the header block. */
212 decode_header (current_header
, ¤t_stat_info
, ¤t_format
, 0);
214 print_header (¤t_stat_info
, -1);
216 if (incremental_option
&& current_header
->header
.typeflag
== GNUTYPE_DUMPDIR
)
219 size_t written
, check
;
220 union block
*data_block
;
222 set_next_block_after (current_header
);
223 if (multi_volume_option
)
225 assign_string (&save_name
, current_stat_info
.file_name
);
226 save_totsize
= current_stat_info
.stat
.st_size
;
228 for (size
= current_stat_info
.stat
.st_size
; size
> 0; size
-= written
)
230 if (multi_volume_option
)
231 save_sizeleft
= size
;
232 data_block
= find_next_block ();
235 ERROR ((0, 0, _("Unexpected EOF in archive")));
236 break; /* FIXME: What happens, then? */
238 written
= available_space_after (data_block
);
242 check
= fwrite (data_block
->buffer
, sizeof (char), written
, stdlis
);
243 set_next_block_after ((union block
*)
244 (data_block
->buffer
+ written
- 1));
245 if (check
!= written
)
247 write_error_details (current_stat_info
.file_name
, check
, written
);
248 skip_file (size
- written
);
252 if (multi_volume_option
)
253 assign_string (&save_name
, 0);
254 fputc ('\n', stdlis
);
260 if (multi_volume_option
)
261 assign_string (&save_name
, current_stat_info
.file_name
);
265 if (multi_volume_option
)
266 assign_string (&save_name
, 0);
269 /* Check header checksum */
270 /* The standard BSD tar sources create the checksum by adding up the
271 bytes in the header as type char. I think the type char was unsigned
272 on the PDP-11, but it's signed on the Next and Sun. It looks like the
273 sources to BSD tar were never changed to compute the checksum
274 correctly, so both the Sun and Next add the bytes of the header as
275 signed chars. This doesn't cause a problem until you get a file with
276 a name containing characters with the high bit set. So tar_checksum
277 computes two checksums -- signed and unsigned. */
280 tar_checksum (union block
*header
, bool silent
)
283 int unsigned_sum
= 0; /* the POSIX one :-) */
284 int signed_sum
= 0; /* the Sun one :-( */
286 uintmax_t parsed_sum
;
290 for (i
= sizeof *header
; i
-- != 0;)
292 unsigned_sum
+= (unsigned char) *p
;
293 signed_sum
+= (signed char) (*p
++);
296 if (unsigned_sum
== 0)
297 return HEADER_ZERO_BLOCK
;
299 /* Adjust checksum to count the "chksum" field as blanks. */
301 for (i
= sizeof header
->header
.chksum
; i
-- != 0;)
303 unsigned_sum
-= (unsigned char) header
->header
.chksum
[i
];
304 signed_sum
-= (signed char) (header
->header
.chksum
[i
]);
306 unsigned_sum
+= ' ' * sizeof header
->header
.chksum
;
307 signed_sum
+= ' ' * sizeof header
->header
.chksum
;
309 parsed_sum
= from_header (header
->header
.chksum
,
310 sizeof header
->header
.chksum
, 0,
312 (uintmax_t) TYPE_MAXIMUM (int), silent
);
313 if (parsed_sum
== (uintmax_t) -1)
314 return HEADER_FAILURE
;
316 recorded_sum
= parsed_sum
;
318 if (unsigned_sum
!= recorded_sum
&& signed_sum
!= recorded_sum
)
319 return HEADER_FAILURE
;
321 return HEADER_SUCCESS
;
324 /* Read a block that's supposed to be a header block. Return its
325 address in "current_header", and if it is good, the file's size in
326 current_stat_info.stat.st_size.
328 Return 1 for success, 0 if the checksum is bad, EOF on eof, 2 for a
329 block full of zeros (EOF marker).
331 If RAW_EXTENDED_HEADERS is nonzero, do not automagically fold the
332 GNU long name and link headers into later headers.
334 You must always set_next_block_after(current_header) to skip past
335 the header which this routine reads. */
338 read_header (bool raw_extended_headers
)
342 union block
*header_copy
;
344 union block
*data_block
;
345 size_t size
, written
;
346 union block
*next_long_name
= 0;
347 union block
*next_long_link
= 0;
348 size_t next_long_name_blocks
;
349 size_t next_long_link_blocks
;
353 enum read_header status
;
355 header
= find_next_block ();
356 current_header
= header
;
358 return HEADER_END_OF_FILE
;
360 if ((status
= tar_checksum (header
, false)) != HEADER_SUCCESS
)
363 /* Good block. Decode file size and return. */
365 if (header
->header
.typeflag
== LNKTYPE
)
366 current_stat_info
.stat
.st_size
= 0; /* links 0 size on tape */
368 current_stat_info
.stat
.st_size
= OFF_FROM_HEADER (header
->header
.size
);
370 if (header
->header
.typeflag
== GNUTYPE_LONGNAME
371 || header
->header
.typeflag
== GNUTYPE_LONGLINK
372 || header
->header
.typeflag
== XHDTYPE
373 || header
->header
.typeflag
== XGLTYPE
)
375 if (raw_extended_headers
)
376 return HEADER_SUCCESS_EXTENDED
;
377 else if (header
->header
.typeflag
== GNUTYPE_LONGNAME
378 || header
->header
.typeflag
== GNUTYPE_LONGLINK
)
380 size_t name_size
= current_stat_info
.stat
.st_size
;
381 size_t n
= name_size
% BLOCKSIZE
;
382 size
= name_size
+ BLOCKSIZE
;
384 size
+= BLOCKSIZE
- n
;
386 if (name_size
!= current_stat_info
.stat
.st_size
390 header_copy
= xmalloc (size
+ 1);
392 if (header
->header
.typeflag
== GNUTYPE_LONGNAME
)
395 free (next_long_name
);
396 next_long_name
= header_copy
;
397 next_long_name_blocks
= size
/ BLOCKSIZE
;
402 free (next_long_link
);
403 next_long_link
= header_copy
;
404 next_long_link_blocks
= size
/ BLOCKSIZE
;
407 set_next_block_after (header
);
408 *header_copy
= *header
;
409 bp
= header_copy
->buffer
+ BLOCKSIZE
;
411 for (size
-= BLOCKSIZE
; size
> 0; size
-= written
)
413 data_block
= find_next_block ();
416 ERROR ((0, 0, _("Unexpected EOF in archive")));
419 written
= available_space_after (data_block
);
423 memcpy (bp
, data_block
->buffer
, written
);
425 set_next_block_after ((union block
*)
426 (data_block
->buffer
+ written
- 1));
431 else if (header
->header
.typeflag
== XHDTYPE
)
432 xheader_read (header
, OFF_FROM_HEADER (header
->header
.size
));
433 else if (header
->header
.typeflag
== XGLTYPE
)
435 xheader_read (header
, OFF_FROM_HEADER (header
->header
.size
));
436 xheader_decode_global ();
445 struct posix_header
const *h
= ¤t_header
->header
;
446 char namebuf
[sizeof h
->prefix
+ 1 + NAME_FIELD_SIZE
+ 1];
448 if (recent_long_name
)
449 free (recent_long_name
);
453 name
= next_long_name
->buffer
+ BLOCKSIZE
;
454 recent_long_name
= next_long_name
;
455 recent_long_name_blocks
= next_long_name_blocks
;
459 /* Accept file names as specified by POSIX.1-1996
463 if (h
->prefix
[0] && strcmp (h
->magic
, TMAGIC
) == 0)
465 memcpy (np
, h
->prefix
, sizeof h
->prefix
);
466 np
[sizeof h
->prefix
] = '\0';
470 /* Prevent later references to current_header from
471 mistakenly treating this as an old GNU header.
472 This assignment invalidates h->prefix. */
473 current_header
->oldgnu_header
.isextended
= 0;
475 memcpy (np
, h
->name
, sizeof h
->name
);
476 np
[sizeof h
->name
] = '\0';
478 recent_long_name
= 0;
479 recent_long_name_blocks
= 0;
481 assign_string (¤t_stat_info
.orig_file_name
, name
);
482 assign_string (¤t_stat_info
.file_name
, name
);
483 current_stat_info
.had_trailing_slash
= strip_trailing_slashes (current_stat_info
.file_name
);
485 if (recent_long_link
)
486 free (recent_long_link
);
490 name
= next_long_link
->buffer
+ BLOCKSIZE
;
491 recent_long_link
= next_long_link
;
492 recent_long_link_blocks
= next_long_link_blocks
;
496 memcpy (namebuf
, h
->linkname
, sizeof h
->linkname
);
497 namebuf
[sizeof h
->linkname
] = '\0';
499 recent_long_link
= 0;
500 recent_long_link_blocks
= 0;
502 assign_string (¤t_stat_info
.link_name
, name
);
504 return HEADER_SUCCESS
;
509 #define ISOCTAL(c) ((c)>='0'&&(c)<='7')
511 /* Decode things from a file HEADER block into STAT_INFO, also setting
512 *FORMAT_POINTER depending on the header block format. If
513 DO_USER_GROUP, decode the user/group information (this is useful
514 for extraction, but waste time when merely listing).
516 read_header() has already decoded the checksum and length, so we don't.
518 This routine should *not* be called twice for the same block, since
519 the two calls might use different DO_USER_GROUP values and thus
520 might end up with different uid/gid for the two calls. If anybody
521 wants the uid/gid they should decode it first, and other callers
522 should decode it without uid/gid before calling a routine,
523 e.g. print_header, that assumes decoded data. */
525 decode_header (union block
*header
, struct tar_stat_info
*stat_info
,
526 enum archive_format
*format_pointer
, int do_user_group
)
528 enum archive_format format
;
530 if (strcmp (header
->header
.magic
, TMAGIC
) == 0)
532 if (header
->star_header
.prefix
[130] == 0
533 && ISOCTAL (header
->star_header
.atime
[0])
534 && header
->star_header
.atime
[11] == ' '
535 && ISOCTAL (header
->star_header
.ctime
[0])
536 && header
->star_header
.ctime
[11] == ' ')
537 format
= STAR_FORMAT
;
538 else if (extended_header
.size
)
539 format
= POSIX_FORMAT
;
541 format
= USTAR_FORMAT
;
543 else if (strcmp (header
->header
.magic
, OLDGNU_MAGIC
) == 0)
544 format
= OLDGNU_FORMAT
;
547 *format_pointer
= format
;
549 stat_info
->stat
.st_mode
= MODE_FROM_HEADER (header
->header
.mode
);
550 stat_info
->stat
.st_mtime
= TIME_FROM_HEADER (header
->header
.mtime
);
551 assign_string (&stat_info
->uname
,
552 header
->header
.uname
[0] ? header
->header
.uname
: NULL
);
553 assign_string (&stat_info
->gname
,
554 header
->header
.gname
[0] ? header
->header
.gname
: NULL
);
555 stat_info
->devmajor
= MAJOR_FROM_HEADER (header
->header
.devmajor
);
556 stat_info
->devminor
= MINOR_FROM_HEADER (header
->header
.devminor
);
558 stat_info
->stat
.st_atime
= start_time
;
559 stat_info
->stat
.st_ctime
= start_time
;
561 if (format
== OLDGNU_FORMAT
&& incremental_option
)
563 stat_info
->stat
.st_atime
= TIME_FROM_HEADER (header
->oldgnu_header
.atime
);
564 stat_info
->stat
.st_ctime
= TIME_FROM_HEADER (header
->oldgnu_header
.ctime
);
567 if (format
== V7_FORMAT
)
569 stat_info
->stat
.st_uid
= UID_FROM_HEADER (header
->header
.uid
);
570 stat_info
->stat
.st_gid
= GID_FROM_HEADER (header
->header
.gid
);
571 stat_info
->stat
.st_rdev
= 0;
576 if (format
== STAR_FORMAT
)
578 stat_info
->stat
.st_atime
= TIME_FROM_HEADER (header
->star_header
.atime
);
579 stat_info
->stat
.st_ctime
= TIME_FROM_HEADER (header
->star_header
.ctime
);
584 /* FIXME: Decide if this should somewhat depend on -p. */
586 if (numeric_owner_option
587 || !*header
->header
.uname
588 || !uname_to_uid (header
->header
.uname
, &stat_info
->stat
.st_uid
))
589 stat_info
->stat
.st_uid
= UID_FROM_HEADER (header
->header
.uid
);
591 if (numeric_owner_option
592 || !*header
->header
.gname
593 || !gname_to_gid (header
->header
.gname
, &stat_info
->stat
.st_gid
))
594 stat_info
->stat
.st_gid
= GID_FROM_HEADER (header
->header
.gid
);
597 switch (header
->header
.typeflag
)
601 stat_info
->stat
.st_rdev
= makedev (stat_info
->devmajor
,
602 stat_info
->devminor
);
606 stat_info
->stat
.st_rdev
= 0;
610 stat_info
->archive_file_size
= stat_info
->stat
.st_size
;
611 xheader_decode (stat_info
);
613 if (sparse_member_p (stat_info
))
615 sparse_fixup_header (stat_info
);
616 stat_info
->is_sparse
= true;
619 stat_info
->is_sparse
= false;
622 /* Convert buffer at WHERE0 of size DIGS from external format to
623 uintmax_t. The data is of type TYPE. The buffer must represent a
624 value in the range -MINUS_MINVAL through MAXVAL. DIGS must be
625 positive. SILENT=true inhibits printing diagnostic messages.
626 Return -1 on error, diagnosing the error if TYPE is
629 from_header (char const *where0
, size_t digs
, char const *type
,
630 uintmax_t minus_minval
, uintmax_t maxval
, bool silent
)
633 char const *where
= where0
;
634 char const *lim
= where
+ digs
;
637 /* Accommodate buggy tar of unknown vintage, which outputs leading
638 NUL if the previous field overflows. */
641 /* Accommodate older tars, which output leading spaces. */
648 /* TRANSLATORS: %s is type of the value (gid_t, uid_t, etc.) */
649 _("Blanks in header where numeric %s value expected"),
653 if (!ISSPACE ((unsigned char) *where
))
659 if (ISODIGIT (*where
))
661 char const *where1
= where
;
662 uintmax_t overflow
= 0;
666 value
+= *where
++ - '0';
667 if (where
== lim
|| ! ISODIGIT (*where
))
669 overflow
|= value
^ (value
<< LG_8
>> LG_8
);
673 /* Parse the output of older, unportable tars, which generate
674 negative values in two's complement octal. If the leading
675 nonzero digit is 1, we can't recover the original value
676 reliably; so do this only if the digit is 2 or more. This
677 catches the common case of 32-bit negative time stamps. */
678 if ((overflow
|| maxval
< value
) && '2' <= *where1
&& type
)
680 /* Compute the negative of the input value, assuming two's
682 int digit
= (*where1
- '0') | 4;
690 if (where
== lim
|| ! ISODIGIT (*where
))
692 digit
= *where
- '0';
693 overflow
|= value
^ (value
<< LG_8
>> LG_8
);
699 if (!overflow
&& value
<= minus_minval
)
703 /* TRANSLATORS: Second %s is a type name (gid_t,uid_t,etc.) */
704 _("Archive octal value %.*s is out of %s range; assuming two's complement"),
705 (int) (where
- where1
), where1
, type
));
714 /* TRANSLATORS: Second %s is a type name (gid_t,uid_t,etc.) */
715 _("Archive octal value %.*s is out of %s range"),
716 (int) (where
- where1
), where1
, type
));
720 else if (*where
== '-' || *where
== '+')
722 /* Parse base-64 output produced only by tar test versions
723 1.13.6 (1999-08-11) through 1.13.11 (1999-08-23).
724 Support for this will be withdrawn in future releases. */
726 static int warned_once
;
732 _("Archive contains obsolescent base-64 headers")));
734 negative
= *where
++ == '-';
736 && (dig
= base64_map
[(unsigned char) *where
]) < 64)
738 if (value
<< LG_64
>> LG_64
!= value
)
740 char *string
= alloca (digs
+ 1);
741 memcpy (string
, where0
, digs
);
745 _("Archive signed base-64 string %s is out of %s range"),
746 quote (string
), type
));
749 value
= (value
<< LG_64
) | dig
;
753 else if (*where
== '\200' /* positive base-256 */
754 || *where
== '\377' /* negative base-256 */)
756 /* Parse base-256 output. A nonnegative number N is
757 represented as (256**DIGS)/2 + N; a negative number -N is
758 represented as (256**DIGS) - N, i.e. as two's complement.
759 The representation guarantees that the leading bit is
760 always on, so that we don't confuse this format with the
761 others (assuming ASCII bytes of 8 bits or more). */
762 int signbit
= *where
& (1 << (LG_256
- 2));
763 uintmax_t topbits
= (((uintmax_t) - signbit
)
764 << (CHAR_BIT
* sizeof (uintmax_t)
765 - LG_256
- (LG_256
- 2)));
766 value
= (*where
++ & ((1 << (LG_256
- 2)) - 1)) - signbit
;
769 value
= (value
<< LG_256
) + (unsigned char) *where
++;
772 if (((value
<< LG_256
>> LG_256
) | topbits
) != value
)
776 _("Archive base-256 value is out of %s range"),
786 if (where
!= lim
&& *where
&& !ISSPACE ((unsigned char) *where
))
790 char buf
[1000]; /* Big enough to represent any header. */
791 static struct quoting_options
*o
;
795 o
= clone_quoting_options (0);
796 set_quoting_style (o
, locale_quoting_style
);
799 while (where0
!= lim
&& ! lim
[-1])
801 quotearg_buffer (buf
, sizeof buf
, where0
, lim
- where
, o
);
804 /* TRANSLATORS: Second %s is a type name (gid_t,uid_t,etc.) */
805 _("Archive contains %.*s where numeric %s value expected"),
806 (int) sizeof buf
, buf
, type
));
812 if (value
<= (negative
? minus_minval
: maxval
))
813 return negative
? -value
: value
;
817 char minval_buf
[UINTMAX_STRSIZE_BOUND
+ 1];
818 char maxval_buf
[UINTMAX_STRSIZE_BOUND
];
819 char value_buf
[UINTMAX_STRSIZE_BOUND
+ 1];
820 char *minval_string
= STRINGIFY_BIGINT (minus_minval
, minval_buf
+ 1);
821 char *value_string
= STRINGIFY_BIGINT (value
, value_buf
+ 1);
823 *--value_string
= '-';
825 *--minval_string
= '-';
826 /* TRANSLATORS: Second %s is type name (gid_t,uid_t,etc.) */
827 ERROR ((0, 0, _("Archive value %s is out of %s range %s..%s"),
829 minval_string
, STRINGIFY_BIGINT (maxval
, maxval_buf
)));
836 gid_from_header (const char *p
, size_t s
)
838 return from_header (p
, s
, "gid_t",
839 - (uintmax_t) TYPE_MINIMUM (gid_t
),
840 (uintmax_t) TYPE_MAXIMUM (gid_t
),
845 major_from_header (const char *p
, size_t s
)
847 return from_header (p
, s
, "major_t",
848 - (uintmax_t) TYPE_MINIMUM (major_t
),
849 (uintmax_t) TYPE_MAXIMUM (major_t
), false);
853 minor_from_header (const char *p
, size_t s
)
855 return from_header (p
, s
, "minor_t",
856 - (uintmax_t) TYPE_MINIMUM (minor_t
),
857 (uintmax_t) TYPE_MAXIMUM (minor_t
), false);
861 mode_from_header (const char *p
, size_t s
)
863 /* Do not complain about unrecognized mode bits. */
864 unsigned u
= from_header (p
, s
, "mode_t",
865 - (uintmax_t) TYPE_MINIMUM (mode_t
),
866 TYPE_MAXIMUM (uintmax_t), false);
867 return ((u
& TSUID
? S_ISUID
: 0)
868 | (u
& TSGID
? S_ISGID
: 0)
869 | (u
& TSVTX
? S_ISVTX
: 0)
870 | (u
& TUREAD
? S_IRUSR
: 0)
871 | (u
& TUWRITE
? S_IWUSR
: 0)
872 | (u
& TUEXEC
? S_IXUSR
: 0)
873 | (u
& TGREAD
? S_IRGRP
: 0)
874 | (u
& TGWRITE
? S_IWGRP
: 0)
875 | (u
& TGEXEC
? S_IXGRP
: 0)
876 | (u
& TOREAD
? S_IROTH
: 0)
877 | (u
& TOWRITE
? S_IWOTH
: 0)
878 | (u
& TOEXEC
? S_IXOTH
: 0));
882 off_from_header (const char *p
, size_t s
)
884 /* Negative offsets are not allowed in tar files, so invoke
885 from_header with minimum value 0, not TYPE_MINIMUM (off_t). */
886 return from_header (p
, s
, "off_t", (uintmax_t) 0,
887 (uintmax_t) TYPE_MAXIMUM (off_t
), false);
891 size_from_header (const char *p
, size_t s
)
893 return from_header (p
, s
, "size_t", (uintmax_t) 0,
894 (uintmax_t) TYPE_MAXIMUM (size_t), false);
898 time_from_header (const char *p
, size_t s
)
900 return from_header (p
, s
, "time_t",
901 - (uintmax_t) TYPE_MINIMUM (time_t),
902 (uintmax_t) TYPE_MAXIMUM (time_t), false);
906 uid_from_header (const char *p
, size_t s
)
908 return from_header (p
, s
, "uid_t",
909 - (uintmax_t) TYPE_MINIMUM (uid_t
),
910 (uintmax_t) TYPE_MAXIMUM (uid_t
), false);
914 uintmax_from_header (const char *p
, size_t s
)
916 return from_header (p
, s
, "uintmax_t", (uintmax_t) 0,
917 TYPE_MAXIMUM (uintmax_t), false);
921 /* Format O as a null-terminated decimal string into BUF _backwards_;
922 return pointer to start of result. */
924 stringify_uintmax_t_backwards (uintmax_t o
, char *buf
)
928 *--buf
= '0' + (int) (o
% 10);
929 while ((o
/= 10) != 0);
933 /* Return a printable representation of T. The result points to
934 static storage that can be reused in the next call to this
935 function, to ctime, or to asctime. */
939 static char buffer
[max (UINTMAX_STRSIZE_BOUND
+ 1,
940 INT_STRLEN_BOUND (int) + 16)];
947 char const *time_stamp
= p
+ 4;
948 for (p
+= 16; p
[3] != '\n'; p
++)
954 /* Use ISO 8610 format. See:
955 http://www.cl.cam.ac.uk/~mgk25/iso-time.html */
956 struct tm
*tm
= utc_option
? gmtime (&t
) : localtime (&t
);
959 sprintf (buffer
, "%04ld-%02d-%02d %02d:%02d:%02d",
960 tm
->tm_year
+ 1900L, tm
->tm_mon
+ 1, tm
->tm_mday
,
961 tm
->tm_hour
, tm
->tm_min
, tm
->tm_sec
);
966 /* The time stamp cannot be broken down, most likely because it
967 is out of range. Convert it as an integer,
968 right-adjusted in a field with the same width as the usual
969 19-byte 4-year ISO time format. */
970 p
= stringify_uintmax_t_backwards (t
< 0 ? - (uintmax_t) t
: (uintmax_t) t
,
971 buffer
+ sizeof buffer
);
974 while (buffer
+ sizeof buffer
- 19 - 1 < p
)
979 /* Actually print it.
981 Plain and fancy file header block logging. Non-verbose just prints
982 the name, e.g. for "tar t" or "tar x". This should just contain
983 file names, so it can be fed back into tar with xargs or the "-T"
984 option. The verbose option can give a bunch of info, one line per
985 file. I doubt anybody tries to parse its format, or if they do,
986 they shouldn't. Unix tar is pretty random here anyway. */
989 /* FIXME: Note that print_header uses the globals HEAD, HSTAT, and
990 HEAD_STANDARD, which must be set up in advance. Not very clean.. */
992 /* UGSWIDTH starts with 18, so with user and group names <= 8 chars, the
993 columns never shift during the listing. */
995 static int ugswidth
= UGSWIDTH
; /* maximum width encountered so far */
997 /* DATEWIDTH is the number of columns taken by the date and time fields. */
999 # define DATEWIDTH 19
1001 # define DATEWIDTH 18
1005 print_header (struct tar_stat_info
*st
, off_t block_ordinal
)
1008 char const *time_stamp
;
1009 char *temp_name
= st
->orig_file_name
? st
->orig_file_name
: st
->file_name
;
1011 /* These hold formatted ints. */
1012 char uform
[UINTMAX_STRSIZE_BOUND
], gform
[UINTMAX_STRSIZE_BOUND
];
1014 char size
[2 * UINTMAX_STRSIZE_BOUND
];
1015 /* holds formatted size or major,minor */
1016 char uintbuf
[UINTMAX_STRSIZE_BOUND
];
1019 if (block_number_option
)
1021 char buf
[UINTMAX_STRSIZE_BOUND
];
1022 if (block_ordinal
< 0)
1023 block_ordinal
= current_block_ordinal ();
1024 block_ordinal
-= recent_long_name_blocks
;
1025 block_ordinal
-= recent_long_link_blocks
;
1026 fprintf (stdlis
, _("block %s: "),
1027 STRINGIFY_BIGINT (block_ordinal
, buf
));
1030 if (verbose_option
<= 1)
1032 /* Just the fax, mam. */
1033 fprintf (stdlis
, "%s\n", quotearg (temp_name
));
1037 /* File type and modes. */
1040 switch (current_header
->header
.typeflag
)
1042 case GNUTYPE_VOLHDR
:
1046 case GNUTYPE_MULTIVOL
:
1054 case GNUTYPE_LONGNAME
:
1055 case GNUTYPE_LONGLINK
:
1057 ERROR ((0, 0, _("Unexpected long name header")));
1060 case GNUTYPE_SPARSE
:
1064 if (temp_name
[strlen (temp_name
) - 1] == '/')
1070 case GNUTYPE_DUMPDIR
:
1093 decode_mode (st
->stat
.st_mode
, modes
+ 1);
1097 time_stamp
= tartime (st
->stat
.st_mtime
);
1099 /* User and group names. */
1101 if (st
->uname
&& current_format
!= V7_FORMAT
1102 && !numeric_owner_option
)
1106 /* Try parsing it as an unsigned integer first, and as a
1107 uid_t if that fails. This method can list positive user
1108 ids that are too large to fit in a uid_t. */
1109 uintmax_t u
= from_header (current_header
->header
.uid
,
1110 sizeof current_header
->header
.uid
, 0,
1112 (uintmax_t) TYPE_MAXIMUM (uintmax_t),
1115 user
= STRINGIFY_BIGINT (u
, uform
);
1118 sprintf (uform
, "%ld",
1119 (long) UID_FROM_HEADER (current_header
->header
.uid
));
1124 if (st
->gname
&& current_format
!= V7_FORMAT
1125 && !numeric_owner_option
)
1129 /* Try parsing it as an unsigned integer first, and as a
1130 gid_t if that fails. This method can list positive group
1131 ids that are too large to fit in a gid_t. */
1132 uintmax_t g
= from_header (current_header
->header
.gid
,
1133 sizeof current_header
->header
.gid
, 0,
1135 (uintmax_t) TYPE_MAXIMUM (uintmax_t),
1138 group
= STRINGIFY_BIGINT (g
, gform
);
1141 sprintf (gform
, "%ld",
1142 (long) GID_FROM_HEADER (current_header
->header
.gid
));
1147 /* Format the file size or major/minor device numbers. */
1149 switch (current_header
->header
.typeflag
)
1154 STRINGIFY_BIGINT (major (st
->stat
.st_rdev
), uintbuf
));
1157 STRINGIFY_BIGINT (minor (st
->stat
.st_rdev
), uintbuf
));
1161 /* st->stat.st_size keeps stored file size */
1162 strcpy (size
, STRINGIFY_BIGINT (st
->stat
.st_size
, uintbuf
));
1166 /* Figure out padding and print the whole line. */
1168 pad
= strlen (user
) + strlen (group
) + strlen (size
) + 1;
1172 fprintf (stdlis
, "%s %s/%s %*s%s %s",
1173 modes
, user
, group
, ugswidth
- pad
, "", size
, time_stamp
);
1175 fprintf (stdlis
, " %s", quotearg (temp_name
));
1177 switch (current_header
->header
.typeflag
)
1180 fprintf (stdlis
, " -> %s\n", quotearg (st
->link_name
));
1184 fprintf (stdlis
, _(" link to %s\n"), quotearg (st
->link_name
));
1189 char type_string
[2];
1190 type_string
[0] = current_header
->header
.typeflag
;
1191 type_string
[1] = '\0';
1192 fprintf (stdlis
, _(" unknown file type %s\n"),
1193 quote (type_string
));
1199 case GNUTYPE_SPARSE
:
1205 case GNUTYPE_DUMPDIR
:
1206 putc ('\n', stdlis
);
1209 case GNUTYPE_LONGLINK
:
1210 fprintf (stdlis
, _("--Long Link--\n"));
1213 case GNUTYPE_LONGNAME
:
1214 fprintf (stdlis
, _("--Long Name--\n"));
1217 case GNUTYPE_VOLHDR
:
1218 fprintf (stdlis
, _("--Volume Header--\n"));
1221 case GNUTYPE_MULTIVOL
:
1224 (UINTMAX_FROM_HEADER (current_header
->oldgnu_header
.offset
),
1226 fprintf (stdlis
, _("--Continued at byte %s--\n"), size
);
1230 fprintf (stdlis
, _("--Mangled file names--\n"));
1237 /* Print a similar line when we make a directory automatically. */
1239 print_for_mkdir (char *dirname
, int length
, mode_t mode
)
1243 if (verbose_option
> 1)
1245 /* File type and modes. */
1248 decode_mode (mode
, modes
+ 1);
1250 if (block_number_option
)
1252 char buf
[UINTMAX_STRSIZE_BOUND
];
1253 fprintf (stdlis
, _("block %s: "),
1254 STRINGIFY_BIGINT (current_block_ordinal (), buf
));
1257 fprintf (stdlis
, "%s %*s %.*s\n", modes
, ugswidth
+ DATEWIDTH
,
1258 _("Creating directory:"), length
, quotearg (dirname
));
1262 /* Skip over SIZE bytes of data in blocks in the archive. */
1264 skip_file (off_t size
)
1268 if (multi_volume_option
)
1270 save_totsize
= size
;
1271 save_sizeleft
= size
;
1274 if (seekable_archive
)
1276 off_t nblk
= seek_archive (size
);
1279 size
-= nblk
* BLOCKSIZE
;
1280 if (multi_volume_option
) /* Argh.. */
1281 save_sizeleft
-= nblk
* BLOCKSIZE
;
1284 seekable_archive
= false;
1289 x
= find_next_block ();
1291 FATAL_ERROR ((0, 0, _("Unexpected EOF in archive")));
1293 set_next_block_after (x
);
1295 if (multi_volume_option
)
1296 save_sizeleft
-= BLOCKSIZE
;
1300 /* Skip the current member in the archive.
1301 NOTE: Current header must be decoded before calling this function. */
1305 char save_typeflag
= current_header
->header
.typeflag
;
1306 set_next_block_after (current_header
);
1308 assign_string (&save_name
, current_stat_info
.file_name
);
1310 if (current_stat_info
.is_sparse
)
1311 sparse_skip_file (¤t_stat_info
);
1312 else if (save_typeflag
!= DIRTYPE
)
1313 skip_file (current_stat_info
.stat
.st_size
);