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 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
= name_size
- name_size
% BLOCKSIZE
+ 2 * BLOCKSIZE
;
382 if (name_size
!= current_stat_info
.stat
.st_size
386 header_copy
= xmalloc (size
+ 1);
388 if (header
->header
.typeflag
== GNUTYPE_LONGNAME
)
391 free (next_long_name
);
392 next_long_name
= header_copy
;
393 next_long_name_blocks
= size
/ BLOCKSIZE
;
398 free (next_long_link
);
399 next_long_link
= header_copy
;
400 next_long_link_blocks
= size
/ BLOCKSIZE
;
403 set_next_block_after (header
);
404 *header_copy
= *header
;
405 bp
= header_copy
->buffer
+ BLOCKSIZE
;
407 for (size
-= BLOCKSIZE
; size
> 0; size
-= written
)
409 data_block
= find_next_block ();
412 ERROR ((0, 0, _("Unexpected EOF in archive")));
415 written
= available_space_after (data_block
);
419 memcpy (bp
, data_block
->buffer
, written
);
421 set_next_block_after ((union block
*)
422 (data_block
->buffer
+ written
- 1));
427 else if (header
->header
.typeflag
== XHDTYPE
)
428 xheader_read (header
, OFF_FROM_HEADER (header
->header
.size
));
429 else if (header
->header
.typeflag
== XGLTYPE
)
431 xheader_read (header
, OFF_FROM_HEADER (header
->header
.size
));
432 xheader_decode_global ();
441 struct posix_header
const *h
= ¤t_header
->header
;
442 char namebuf
[sizeof h
->prefix
+ 1 + NAME_FIELD_SIZE
+ 1];
444 if (recent_long_name
)
445 free (recent_long_name
);
449 name
= next_long_name
->buffer
+ BLOCKSIZE
;
450 recent_long_name
= next_long_name
;
451 recent_long_name_blocks
= next_long_name_blocks
;
455 /* Accept file names as specified by POSIX.1-1996
459 if (h
->prefix
[0] && strcmp (h
->magic
, TMAGIC
) == 0)
461 memcpy (np
, h
->prefix
, sizeof h
->prefix
);
462 np
[sizeof h
->prefix
] = '\0';
466 /* Prevent later references to current_header from
467 mistakenly treating this as an old GNU header.
468 This assignment invalidates h->prefix. */
469 current_header
->oldgnu_header
.isextended
= 0;
471 memcpy (np
, h
->name
, sizeof h
->name
);
472 np
[sizeof h
->name
] = '\0';
474 recent_long_name
= 0;
475 recent_long_name_blocks
= 0;
477 assign_string (¤t_stat_info
.orig_file_name
, name
);
478 assign_string (¤t_stat_info
.file_name
, name
);
479 current_stat_info
.had_trailing_slash
= strip_trailing_slashes (current_stat_info
.file_name
);
481 if (recent_long_link
)
482 free (recent_long_link
);
486 name
= next_long_link
->buffer
+ BLOCKSIZE
;
487 recent_long_link
= next_long_link
;
488 recent_long_link_blocks
= next_long_link_blocks
;
492 memcpy (namebuf
, h
->linkname
, sizeof h
->linkname
);
493 namebuf
[sizeof h
->linkname
] = '\0';
495 recent_long_link
= 0;
496 recent_long_link_blocks
= 0;
498 assign_string (¤t_stat_info
.link_name
, name
);
500 return HEADER_SUCCESS
;
505 #define ISOCTAL(c) ((c)>='0'&&(c)<='7')
507 /* Decode things from a file HEADER block into STAT_INFO, also setting
508 *FORMAT_POINTER depending on the header block format. If
509 DO_USER_GROUP, decode the user/group information (this is useful
510 for extraction, but waste time when merely listing).
512 read_header() has already decoded the checksum and length, so we don't.
514 This routine should *not* be called twice for the same block, since
515 the two calls might use different DO_USER_GROUP values and thus
516 might end up with different uid/gid for the two calls. If anybody
517 wants the uid/gid they should decode it first, and other callers
518 should decode it without uid/gid before calling a routine,
519 e.g. print_header, that assumes decoded data. */
521 decode_header (union block
*header
, struct tar_stat_info
*stat_info
,
522 enum archive_format
*format_pointer
, int do_user_group
)
524 enum archive_format format
;
526 if (strcmp (header
->header
.magic
, TMAGIC
) == 0)
528 if (header
->star_header
.prefix
[130] == 0
529 && ISOCTAL (header
->star_header
.atime
[0])
530 && header
->star_header
.atime
[11] == ' '
531 && ISOCTAL (header
->star_header
.ctime
[0])
532 && header
->star_header
.ctime
[11] == ' ')
533 format
= STAR_FORMAT
;
534 else if (extended_header
.size
)
535 format
= POSIX_FORMAT
;
537 format
= USTAR_FORMAT
;
539 else if (strcmp (header
->header
.magic
, OLDGNU_MAGIC
) == 0)
540 format
= OLDGNU_FORMAT
;
543 *format_pointer
= format
;
545 stat_info
->stat
.st_mode
= MODE_FROM_HEADER (header
->header
.mode
);
546 stat_info
->stat
.st_mtime
= TIME_FROM_HEADER (header
->header
.mtime
);
547 assign_string (&stat_info
->uname
,
548 header
->header
.uname
[0] ? header
->header
.uname
: NULL
);
549 assign_string (&stat_info
->gname
,
550 header
->header
.gname
[0] ? header
->header
.gname
: NULL
);
551 stat_info
->devmajor
= MAJOR_FROM_HEADER (header
->header
.devmajor
);
552 stat_info
->devminor
= MINOR_FROM_HEADER (header
->header
.devminor
);
554 stat_info
->stat
.st_atime
= start_time
;
555 stat_info
->stat
.st_ctime
= start_time
;
557 if (format
== OLDGNU_FORMAT
&& incremental_option
)
559 stat_info
->stat
.st_atime
= TIME_FROM_HEADER (header
->oldgnu_header
.atime
);
560 stat_info
->stat
.st_ctime
= TIME_FROM_HEADER (header
->oldgnu_header
.ctime
);
563 if (format
== V7_FORMAT
)
565 stat_info
->stat
.st_uid
= UID_FROM_HEADER (header
->header
.uid
);
566 stat_info
->stat
.st_gid
= GID_FROM_HEADER (header
->header
.gid
);
567 stat_info
->stat
.st_rdev
= 0;
572 if (format
== STAR_FORMAT
)
574 stat_info
->stat
.st_atime
= TIME_FROM_HEADER (header
->star_header
.atime
);
575 stat_info
->stat
.st_ctime
= TIME_FROM_HEADER (header
->star_header
.ctime
);
580 /* FIXME: Decide if this should somewhat depend on -p. */
582 if (numeric_owner_option
583 || !*header
->header
.uname
584 || !uname_to_uid (header
->header
.uname
, &stat_info
->stat
.st_uid
))
585 stat_info
->stat
.st_uid
= UID_FROM_HEADER (header
->header
.uid
);
587 if (numeric_owner_option
588 || !*header
->header
.gname
589 || !gname_to_gid (header
->header
.gname
, &stat_info
->stat
.st_gid
))
590 stat_info
->stat
.st_gid
= GID_FROM_HEADER (header
->header
.gid
);
593 switch (header
->header
.typeflag
)
597 stat_info
->stat
.st_rdev
= makedev (stat_info
->devmajor
,
598 stat_info
->devminor
);
602 stat_info
->stat
.st_rdev
= 0;
606 stat_info
->archive_file_size
= stat_info
->stat
.st_size
;
607 xheader_decode (stat_info
);
609 if (sparse_member_p (stat_info
))
611 sparse_fixup_header (stat_info
);
612 stat_info
->is_sparse
= true;
615 stat_info
->is_sparse
= false;
618 /* Convert buffer at WHERE0 of size DIGS from external format to
619 uintmax_t. The data is of type TYPE. The buffer must represent a
620 value in the range -MINUS_MINVAL through MAXVAL. DIGS must be
621 positive. SILENT=true inhibits printing diagnostic messages.
622 Return -1 on error, diagnosing the error if TYPE is
625 from_header (char const *where0
, size_t digs
, char const *type
,
626 uintmax_t minus_minval
, uintmax_t maxval
, bool silent
)
629 char const *where
= where0
;
630 char const *lim
= where
+ digs
;
633 /* Accommodate buggy tar of unknown vintage, which outputs leading
634 NUL if the previous field overflows. */
637 /* Accommodate older tars, which output leading spaces. */
644 _("Blanks in header where numeric %s value expected"),
648 if (!ISSPACE ((unsigned char) *where
))
654 if (ISODIGIT (*where
))
656 char const *where1
= where
;
657 uintmax_t overflow
= 0;
661 value
+= *where
++ - '0';
662 if (where
== lim
|| ! ISODIGIT (*where
))
664 overflow
|= value
^ (value
<< LG_8
>> LG_8
);
668 /* Parse the output of older, unportable tars, which generate
669 negative values in two's complement octal. If the leading
670 nonzero digit is 1, we can't recover the original value
671 reliably; so do this only if the digit is 2 or more. This
672 catches the common case of 32-bit negative time stamps. */
673 if ((overflow
|| maxval
< value
) && '2' <= *where1
&& type
)
675 /* Compute the negative of the input value, assuming two's
677 int digit
= (*where1
- '0') | 4;
685 if (where
== lim
|| ! ISODIGIT (*where
))
687 digit
= *where
- '0';
688 overflow
|= value
^ (value
<< LG_8
>> LG_8
);
694 if (!overflow
&& value
<= minus_minval
)
698 _("Archive octal value %.*s is out of %s range; assuming two's complement"),
699 (int) (where
- where1
), where1
, type
));
708 _("Archive octal value %.*s is out of %s range"),
709 (int) (where
- where1
), where1
, type
));
713 else if (*where
== '-' || *where
== '+')
715 /* Parse base-64 output produced only by tar test versions
716 1.13.6 (1999-08-11) through 1.13.11 (1999-08-23).
717 Support for this will be withdrawn in future releases. */
719 static int warned_once
;
725 _("Archive contains obsolescent base-64 headers")));
727 negative
= *where
++ == '-';
729 && (dig
= base64_map
[(unsigned char) *where
]) < 64)
731 if (value
<< LG_64
>> LG_64
!= value
)
733 char *string
= alloca (digs
+ 1);
734 memcpy (string
, where0
, digs
);
738 _("Archive signed base-64 string %s is out of %s range"),
739 quote (string
), type
));
742 value
= (value
<< LG_64
) | dig
;
746 else if (*where
== '\200' /* positive base-256 */
747 || *where
== '\377' /* negative base-256 */)
749 /* Parse base-256 output. A nonnegative number N is
750 represented as (256**DIGS)/2 + N; a negative number -N is
751 represented as (256**DIGS) - N, i.e. as two's complement.
752 The representation guarantees that the leading bit is
753 always on, so that we don't confuse this format with the
754 others (assuming ASCII bytes of 8 bits or more). */
755 int signbit
= *where
& (1 << (LG_256
- 2));
756 uintmax_t topbits
= (((uintmax_t) - signbit
)
757 << (CHAR_BIT
* sizeof (uintmax_t)
758 - LG_256
- (LG_256
- 2)));
759 value
= (*where
++ & ((1 << (LG_256
- 2)) - 1)) - signbit
;
762 value
= (value
<< LG_256
) + (unsigned char) *where
++;
765 if (((value
<< LG_256
>> LG_256
) | topbits
) != value
)
769 _("Archive base-256 value is out of %s range"),
779 if (where
!= lim
&& *where
&& !ISSPACE ((unsigned char) *where
))
783 char buf
[1000]; /* Big enough to represent any header. */
784 static struct quoting_options
*o
;
788 o
= clone_quoting_options (0);
789 set_quoting_style (o
, locale_quoting_style
);
792 while (where0
!= lim
&& ! lim
[-1])
794 quotearg_buffer (buf
, sizeof buf
, where0
, lim
- where
, o
);
797 _("Archive contains %.*s where numeric %s value expected"),
798 (int) sizeof buf
, buf
, type
));
804 if (value
<= (negative
? minus_minval
: maxval
))
805 return negative
? -value
: value
;
809 char minval_buf
[UINTMAX_STRSIZE_BOUND
+ 1];
810 char maxval_buf
[UINTMAX_STRSIZE_BOUND
];
811 char value_buf
[UINTMAX_STRSIZE_BOUND
+ 1];
812 char *minval_string
= STRINGIFY_BIGINT (minus_minval
, minval_buf
+ 1);
813 char *value_string
= STRINGIFY_BIGINT (value
, value_buf
+ 1);
815 *--value_string
= '-';
817 *--minval_string
= '-';
818 ERROR ((0, 0, _("Archive value %s is out of %s range %s.%s"),
820 minval_string
, STRINGIFY_BIGINT (maxval
, maxval_buf
)));
827 gid_from_header (const char *p
, size_t s
)
829 return from_header (p
, s
, "gid_t",
830 - (uintmax_t) TYPE_MINIMUM (gid_t
),
831 (uintmax_t) TYPE_MAXIMUM (gid_t
),
836 major_from_header (const char *p
, size_t s
)
838 return from_header (p
, s
, "major_t",
839 - (uintmax_t) TYPE_MINIMUM (major_t
),
840 (uintmax_t) TYPE_MAXIMUM (major_t
), false);
844 minor_from_header (const char *p
, size_t s
)
846 return from_header (p
, s
, "minor_t",
847 - (uintmax_t) TYPE_MINIMUM (minor_t
),
848 (uintmax_t) TYPE_MAXIMUM (minor_t
), false);
852 mode_from_header (const char *p
, size_t s
)
854 /* Do not complain about unrecognized mode bits. */
855 unsigned u
= from_header (p
, s
, "mode_t",
856 - (uintmax_t) TYPE_MINIMUM (mode_t
),
857 TYPE_MAXIMUM (uintmax_t), false);
858 return ((u
& TSUID
? S_ISUID
: 0)
859 | (u
& TSGID
? S_ISGID
: 0)
860 | (u
& TSVTX
? S_ISVTX
: 0)
861 | (u
& TUREAD
? S_IRUSR
: 0)
862 | (u
& TUWRITE
? S_IWUSR
: 0)
863 | (u
& TUEXEC
? S_IXUSR
: 0)
864 | (u
& TGREAD
? S_IRGRP
: 0)
865 | (u
& TGWRITE
? S_IWGRP
: 0)
866 | (u
& TGEXEC
? S_IXGRP
: 0)
867 | (u
& TOREAD
? S_IROTH
: 0)
868 | (u
& TOWRITE
? S_IWOTH
: 0)
869 | (u
& TOEXEC
? S_IXOTH
: 0));
873 off_from_header (const char *p
, size_t s
)
875 /* Negative offsets are not allowed in tar files, so invoke
876 from_header with minimum value 0, not TYPE_MINIMUM (off_t). */
877 return from_header (p
, s
, "off_t", (uintmax_t) 0,
878 (uintmax_t) TYPE_MAXIMUM (off_t
), false);
882 size_from_header (const char *p
, size_t s
)
884 return from_header (p
, s
, "size_t", (uintmax_t) 0,
885 (uintmax_t) TYPE_MAXIMUM (size_t), false);
889 time_from_header (const char *p
, size_t s
)
891 return from_header (p
, s
, "time_t",
892 - (uintmax_t) TYPE_MINIMUM (time_t),
893 (uintmax_t) TYPE_MAXIMUM (time_t), false);
897 uid_from_header (const char *p
, size_t s
)
899 return from_header (p
, s
, "uid_t",
900 - (uintmax_t) TYPE_MINIMUM (uid_t
),
901 (uintmax_t) TYPE_MAXIMUM (uid_t
), false);
905 uintmax_from_header (const char *p
, size_t s
)
907 return from_header (p
, s
, "uintmax_t", (uintmax_t) 0,
908 TYPE_MAXIMUM (uintmax_t), false);
912 /* Format O as a null-terminated decimal string into BUF _backwards_;
913 return pointer to start of result. */
915 stringify_uintmax_t_backwards (uintmax_t o
, char *buf
)
919 *--buf
= '0' + (int) (o
% 10);
920 while ((o
/= 10) != 0);
924 /* Return a printable representation of T. The result points to
925 static storage that can be reused in the next call to this
926 function, to ctime, or to asctime. */
930 static char buffer
[max (UINTMAX_STRSIZE_BOUND
+ 1,
931 INT_STRLEN_BOUND (int) + 16)];
938 char const *time_stamp
= p
+ 4;
939 for (p
+= 16; p
[3] != '\n'; p
++)
945 /* Use ISO 8610 format. See:
946 http://www.cl.cam.ac.uk/~mgk25/iso-time.html */
947 struct tm
*tm
= utc_option
? gmtime (&t
) : localtime (&t
);
950 sprintf (buffer
, "%04ld-%02d-%02d %02d:%02d:%02d",
951 tm
->tm_year
+ 1900L, tm
->tm_mon
+ 1, tm
->tm_mday
,
952 tm
->tm_hour
, tm
->tm_min
, tm
->tm_sec
);
957 /* The time stamp cannot be broken down, most likely because it
958 is out of range. Convert it as an integer,
959 right-adjusted in a field with the same width as the usual
960 19-byte 4-year ISO time format. */
961 p
= stringify_uintmax_t_backwards (t
< 0 ? - (uintmax_t) t
: (uintmax_t) t
,
962 buffer
+ sizeof buffer
);
965 while (buffer
+ sizeof buffer
- 19 - 1 < p
)
970 /* Actually print it.
972 Plain and fancy file header block logging. Non-verbose just prints
973 the name, e.g. for "tar t" or "tar x". This should just contain
974 file names, so it can be fed back into tar with xargs or the "-T"
975 option. The verbose option can give a bunch of info, one line per
976 file. I doubt anybody tries to parse its format, or if they do,
977 they shouldn't. Unix tar is pretty random here anyway. */
980 /* FIXME: Note that print_header uses the globals HEAD, HSTAT, and
981 HEAD_STANDARD, which must be set up in advance. Not very clean.. */
983 /* UGSWIDTH starts with 18, so with user and group names <= 8 chars, the
984 columns never shift during the listing. */
986 static int ugswidth
= UGSWIDTH
; /* maximum width encountered so far */
988 /* DATEWIDTH is the number of columns taken by the date and time fields. */
990 # define DATEWIDTH 19
992 # define DATEWIDTH 18
996 print_header (struct tar_stat_info
*st
, off_t block_ordinal
)
999 char const *time_stamp
;
1000 char *temp_name
= st
->orig_file_name
? st
->orig_file_name
: st
->file_name
;
1002 /* These hold formatted ints. */
1003 char uform
[UINTMAX_STRSIZE_BOUND
], gform
[UINTMAX_STRSIZE_BOUND
];
1005 char size
[2 * UINTMAX_STRSIZE_BOUND
];
1006 /* holds formatted size or major,minor */
1007 char uintbuf
[UINTMAX_STRSIZE_BOUND
];
1010 if (block_number_option
)
1012 char buf
[UINTMAX_STRSIZE_BOUND
];
1013 if (block_ordinal
< 0)
1014 block_ordinal
= current_block_ordinal ();
1015 block_ordinal
-= recent_long_name_blocks
;
1016 block_ordinal
-= recent_long_link_blocks
;
1017 fprintf (stdlis
, _("block %s: "),
1018 STRINGIFY_BIGINT (block_ordinal
, buf
));
1021 if (verbose_option
<= 1)
1023 /* Just the fax, mam. */
1024 fprintf (stdlis
, "%s\n", quotearg (temp_name
));
1028 /* File type and modes. */
1031 switch (current_header
->header
.typeflag
)
1033 case GNUTYPE_VOLHDR
:
1037 case GNUTYPE_MULTIVOL
:
1045 case GNUTYPE_LONGNAME
:
1046 case GNUTYPE_LONGLINK
:
1048 ERROR ((0, 0, _("Visible longname error")));
1051 case GNUTYPE_SPARSE
:
1055 if (temp_name
[strlen (temp_name
) - 1] == '/')
1061 case GNUTYPE_DUMPDIR
:
1084 decode_mode (st
->stat
.st_mode
, modes
+ 1);
1088 time_stamp
= tartime (st
->stat
.st_mtime
);
1090 /* User and group names. */
1092 if (st
->uname
&& current_format
!= V7_FORMAT
1093 && !numeric_owner_option
)
1097 /* Try parsing it as an unsigned integer first, and as a
1098 uid_t if that fails. This method can list positive user
1099 ids that are too large to fit in a uid_t. */
1100 uintmax_t u
= from_header (current_header
->header
.uid
,
1101 sizeof current_header
->header
.uid
, 0,
1103 (uintmax_t) TYPE_MAXIMUM (uintmax_t),
1106 user
= STRINGIFY_BIGINT (u
, uform
);
1109 sprintf (uform
, "%ld",
1110 (long) UID_FROM_HEADER (current_header
->header
.uid
));
1115 if (st
->gname
&& current_format
!= V7_FORMAT
1116 && !numeric_owner_option
)
1120 /* Try parsing it as an unsigned integer first, and as a
1121 gid_t if that fails. This method can list positive group
1122 ids that are too large to fit in a gid_t. */
1123 uintmax_t g
= from_header (current_header
->header
.gid
,
1124 sizeof current_header
->header
.gid
, 0,
1126 (uintmax_t) TYPE_MAXIMUM (uintmax_t),
1129 group
= STRINGIFY_BIGINT (g
, gform
);
1132 sprintf (gform
, "%ld",
1133 (long) GID_FROM_HEADER (current_header
->header
.gid
));
1138 /* Format the file size or major/minor device numbers. */
1140 switch (current_header
->header
.typeflag
)
1145 STRINGIFY_BIGINT (major (st
->stat
.st_rdev
), uintbuf
));
1148 STRINGIFY_BIGINT (minor (st
->stat
.st_rdev
), uintbuf
));
1152 /* st->stat.st_size keeps stored file size */
1153 strcpy (size
, STRINGIFY_BIGINT (st
->stat
.st_size
, uintbuf
));
1157 /* Figure out padding and print the whole line. */
1159 pad
= strlen (user
) + strlen (group
) + strlen (size
) + 1;
1163 fprintf (stdlis
, "%s %s/%s %*s%s %s",
1164 modes
, user
, group
, ugswidth
- pad
, "", size
, time_stamp
);
1166 fprintf (stdlis
, " %s", quotearg (temp_name
));
1168 switch (current_header
->header
.typeflag
)
1171 fprintf (stdlis
, " -> %s\n", quotearg (st
->link_name
));
1175 fprintf (stdlis
, _(" link to %s\n"), quotearg (st
->link_name
));
1180 char type_string
[2];
1181 type_string
[0] = current_header
->header
.typeflag
;
1182 type_string
[1] = '\0';
1183 fprintf (stdlis
, _(" unknown file type %s\n"),
1184 quote (type_string
));
1190 case GNUTYPE_SPARSE
:
1196 case GNUTYPE_DUMPDIR
:
1197 putc ('\n', stdlis
);
1200 case GNUTYPE_LONGLINK
:
1201 fprintf (stdlis
, _("--Long Link--\n"));
1204 case GNUTYPE_LONGNAME
:
1205 fprintf (stdlis
, _("--Long Name--\n"));
1208 case GNUTYPE_VOLHDR
:
1209 fprintf (stdlis
, _("--Volume Header--\n"));
1212 case GNUTYPE_MULTIVOL
:
1215 (UINTMAX_FROM_HEADER (current_header
->oldgnu_header
.offset
),
1217 fprintf (stdlis
, _("--Continued at byte %s--\n"), size
);
1221 fprintf (stdlis
, _("--Mangled file names--\n"));
1228 /* Print a similar line when we make a directory automatically. */
1230 print_for_mkdir (char *dirname
, int length
, mode_t mode
)
1234 if (verbose_option
> 1)
1236 /* File type and modes. */
1239 decode_mode (mode
, modes
+ 1);
1241 if (block_number_option
)
1243 char buf
[UINTMAX_STRSIZE_BOUND
];
1244 fprintf (stdlis
, _("block %s: "),
1245 STRINGIFY_BIGINT (current_block_ordinal (), buf
));
1248 fprintf (stdlis
, "%s %*s %.*s\n", modes
, ugswidth
+ DATEWIDTH
,
1249 _("Creating directory:"), length
, quotearg (dirname
));
1253 /* Skip over SIZE bytes of data in blocks in the archive. */
1255 skip_file (off_t size
)
1259 if (multi_volume_option
)
1261 save_totsize
= size
;
1262 save_sizeleft
= size
;
1265 if (seekable_archive
)
1267 off_t nblk
= seek_archive (size
);
1270 size
-= nblk
* BLOCKSIZE
;
1271 if (multi_volume_option
) /* Argh.. */
1272 save_sizeleft
-= nblk
* BLOCKSIZE
;
1275 seekable_archive
= false;
1280 x
= find_next_block ();
1282 FATAL_ERROR ((0, 0, _("Unexpected EOF in archive")));
1284 set_next_block_after (x
);
1286 if (multi_volume_option
)
1287 save_sizeleft
-= BLOCKSIZE
;
1291 /* Skip the current member in the archive.
1292 NOTE: Current header must be decoded before calling this function. */
1296 char save_typeflag
= current_header
->header
.typeflag
;
1297 set_next_block_after (current_header
);
1299 assign_string (&save_name
, current_stat_info
.file_name
);
1301 if (current_stat_info
.is_sparse
)
1302 sparse_skip_file (¤t_stat_info
);
1303 else if (save_typeflag
!= DIRTYPE
)
1304 skip_file (current_stat_info
.stat
.st_size
);