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 _("Blanks in header where numeric %s value expected"),
652 if (!ISSPACE ((unsigned char) *where
))
658 if (ISODIGIT (*where
))
660 char const *where1
= where
;
661 uintmax_t overflow
= 0;
665 value
+= *where
++ - '0';
666 if (where
== lim
|| ! ISODIGIT (*where
))
668 overflow
|= value
^ (value
<< LG_8
>> LG_8
);
672 /* Parse the output of older, unportable tars, which generate
673 negative values in two's complement octal. If the leading
674 nonzero digit is 1, we can't recover the original value
675 reliably; so do this only if the digit is 2 or more. This
676 catches the common case of 32-bit negative time stamps. */
677 if ((overflow
|| maxval
< value
) && '2' <= *where1
&& type
)
679 /* Compute the negative of the input value, assuming two's
681 int digit
= (*where1
- '0') | 4;
689 if (where
== lim
|| ! ISODIGIT (*where
))
691 digit
= *where
- '0';
692 overflow
|= value
^ (value
<< LG_8
>> LG_8
);
698 if (!overflow
&& value
<= minus_minval
)
702 _("Archive octal value %.*s is out of %s range; assuming two's complement"),
703 (int) (where
- where1
), where1
, type
));
712 _("Archive octal value %.*s is out of %s range"),
713 (int) (where
- where1
), where1
, type
));
717 else if (*where
== '-' || *where
== '+')
719 /* Parse base-64 output produced only by tar test versions
720 1.13.6 (1999-08-11) through 1.13.11 (1999-08-23).
721 Support for this will be withdrawn in future releases. */
723 static int warned_once
;
729 _("Archive contains obsolescent base-64 headers")));
731 negative
= *where
++ == '-';
733 && (dig
= base64_map
[(unsigned char) *where
]) < 64)
735 if (value
<< LG_64
>> LG_64
!= value
)
737 char *string
= alloca (digs
+ 1);
738 memcpy (string
, where0
, digs
);
742 _("Archive signed base-64 string %s is out of %s range"),
743 quote (string
), type
));
746 value
= (value
<< LG_64
) | dig
;
750 else if (*where
== '\200' /* positive base-256 */
751 || *where
== '\377' /* negative base-256 */)
753 /* Parse base-256 output. A nonnegative number N is
754 represented as (256**DIGS)/2 + N; a negative number -N is
755 represented as (256**DIGS) - N, i.e. as two's complement.
756 The representation guarantees that the leading bit is
757 always on, so that we don't confuse this format with the
758 others (assuming ASCII bytes of 8 bits or more). */
759 int signbit
= *where
& (1 << (LG_256
- 2));
760 uintmax_t topbits
= (((uintmax_t) - signbit
)
761 << (CHAR_BIT
* sizeof (uintmax_t)
762 - LG_256
- (LG_256
- 2)));
763 value
= (*where
++ & ((1 << (LG_256
- 2)) - 1)) - signbit
;
766 value
= (value
<< LG_256
) + (unsigned char) *where
++;
769 if (((value
<< LG_256
>> LG_256
) | topbits
) != value
)
773 _("Archive base-256 value is out of %s range"),
783 if (where
!= lim
&& *where
&& !ISSPACE ((unsigned char) *where
))
787 char buf
[1000]; /* Big enough to represent any header. */
788 static struct quoting_options
*o
;
792 o
= clone_quoting_options (0);
793 set_quoting_style (o
, locale_quoting_style
);
796 while (where0
!= lim
&& ! lim
[-1])
798 quotearg_buffer (buf
, sizeof buf
, where0
, lim
- where
, o
);
801 _("Archive contains %.*s where numeric %s value expected"),
802 (int) sizeof buf
, buf
, type
));
808 if (value
<= (negative
? minus_minval
: maxval
))
809 return negative
? -value
: value
;
813 char minval_buf
[UINTMAX_STRSIZE_BOUND
+ 1];
814 char maxval_buf
[UINTMAX_STRSIZE_BOUND
];
815 char value_buf
[UINTMAX_STRSIZE_BOUND
+ 1];
816 char *minval_string
= STRINGIFY_BIGINT (minus_minval
, minval_buf
+ 1);
817 char *value_string
= STRINGIFY_BIGINT (value
, value_buf
+ 1);
819 *--value_string
= '-';
821 *--minval_string
= '-';
822 ERROR ((0, 0, _("Archive value %s is out of %s range %s.%s"),
824 minval_string
, STRINGIFY_BIGINT (maxval
, maxval_buf
)));
831 gid_from_header (const char *p
, size_t s
)
833 return from_header (p
, s
, "gid_t",
834 - (uintmax_t) TYPE_MINIMUM (gid_t
),
835 (uintmax_t) TYPE_MAXIMUM (gid_t
),
840 major_from_header (const char *p
, size_t s
)
842 return from_header (p
, s
, "major_t",
843 - (uintmax_t) TYPE_MINIMUM (major_t
),
844 (uintmax_t) TYPE_MAXIMUM (major_t
), false);
848 minor_from_header (const char *p
, size_t s
)
850 return from_header (p
, s
, "minor_t",
851 - (uintmax_t) TYPE_MINIMUM (minor_t
),
852 (uintmax_t) TYPE_MAXIMUM (minor_t
), false);
856 mode_from_header (const char *p
, size_t s
)
858 /* Do not complain about unrecognized mode bits. */
859 unsigned u
= from_header (p
, s
, "mode_t",
860 - (uintmax_t) TYPE_MINIMUM (mode_t
),
861 TYPE_MAXIMUM (uintmax_t), false);
862 return ((u
& TSUID
? S_ISUID
: 0)
863 | (u
& TSGID
? S_ISGID
: 0)
864 | (u
& TSVTX
? S_ISVTX
: 0)
865 | (u
& TUREAD
? S_IRUSR
: 0)
866 | (u
& TUWRITE
? S_IWUSR
: 0)
867 | (u
& TUEXEC
? S_IXUSR
: 0)
868 | (u
& TGREAD
? S_IRGRP
: 0)
869 | (u
& TGWRITE
? S_IWGRP
: 0)
870 | (u
& TGEXEC
? S_IXGRP
: 0)
871 | (u
& TOREAD
? S_IROTH
: 0)
872 | (u
& TOWRITE
? S_IWOTH
: 0)
873 | (u
& TOEXEC
? S_IXOTH
: 0));
877 off_from_header (const char *p
, size_t s
)
879 /* Negative offsets are not allowed in tar files, so invoke
880 from_header with minimum value 0, not TYPE_MINIMUM (off_t). */
881 return from_header (p
, s
, "off_t", (uintmax_t) 0,
882 (uintmax_t) TYPE_MAXIMUM (off_t
), false);
886 size_from_header (const char *p
, size_t s
)
888 return from_header (p
, s
, "size_t", (uintmax_t) 0,
889 (uintmax_t) TYPE_MAXIMUM (size_t), false);
893 time_from_header (const char *p
, size_t s
)
895 return from_header (p
, s
, "time_t",
896 - (uintmax_t) TYPE_MINIMUM (time_t),
897 (uintmax_t) TYPE_MAXIMUM (time_t), false);
901 uid_from_header (const char *p
, size_t s
)
903 return from_header (p
, s
, "uid_t",
904 - (uintmax_t) TYPE_MINIMUM (uid_t
),
905 (uintmax_t) TYPE_MAXIMUM (uid_t
), false);
909 uintmax_from_header (const char *p
, size_t s
)
911 return from_header (p
, s
, "uintmax_t", (uintmax_t) 0,
912 TYPE_MAXIMUM (uintmax_t), false);
916 /* Format O as a null-terminated decimal string into BUF _backwards_;
917 return pointer to start of result. */
919 stringify_uintmax_t_backwards (uintmax_t o
, char *buf
)
923 *--buf
= '0' + (int) (o
% 10);
924 while ((o
/= 10) != 0);
928 /* Return a printable representation of T. The result points to
929 static storage that can be reused in the next call to this
930 function, to ctime, or to asctime. */
934 static char buffer
[max (UINTMAX_STRSIZE_BOUND
+ 1,
935 INT_STRLEN_BOUND (int) + 16)];
942 char const *time_stamp
= p
+ 4;
943 for (p
+= 16; p
[3] != '\n'; p
++)
949 /* Use ISO 8610 format. See:
950 http://www.cl.cam.ac.uk/~mgk25/iso-time.html */
951 struct tm
*tm
= utc_option
? gmtime (&t
) : localtime (&t
);
954 sprintf (buffer
, "%04ld-%02d-%02d %02d:%02d:%02d",
955 tm
->tm_year
+ 1900L, tm
->tm_mon
+ 1, tm
->tm_mday
,
956 tm
->tm_hour
, tm
->tm_min
, tm
->tm_sec
);
961 /* The time stamp cannot be broken down, most likely because it
962 is out of range. Convert it as an integer,
963 right-adjusted in a field with the same width as the usual
964 19-byte 4-year ISO time format. */
965 p
= stringify_uintmax_t_backwards (t
< 0 ? - (uintmax_t) t
: (uintmax_t) t
,
966 buffer
+ sizeof buffer
);
969 while (buffer
+ sizeof buffer
- 19 - 1 < p
)
974 /* Actually print it.
976 Plain and fancy file header block logging. Non-verbose just prints
977 the name, e.g. for "tar t" or "tar x". This should just contain
978 file names, so it can be fed back into tar with xargs or the "-T"
979 option. The verbose option can give a bunch of info, one line per
980 file. I doubt anybody tries to parse its format, or if they do,
981 they shouldn't. Unix tar is pretty random here anyway. */
984 /* FIXME: Note that print_header uses the globals HEAD, HSTAT, and
985 HEAD_STANDARD, which must be set up in advance. Not very clean.. */
987 /* UGSWIDTH starts with 18, so with user and group names <= 8 chars, the
988 columns never shift during the listing. */
990 static int ugswidth
= UGSWIDTH
; /* maximum width encountered so far */
992 /* DATEWIDTH is the number of columns taken by the date and time fields. */
994 # define DATEWIDTH 19
996 # define DATEWIDTH 18
1000 print_header (struct tar_stat_info
*st
, off_t block_ordinal
)
1003 char const *time_stamp
;
1004 char *temp_name
= st
->orig_file_name
? st
->orig_file_name
: st
->file_name
;
1006 /* These hold formatted ints. */
1007 char uform
[UINTMAX_STRSIZE_BOUND
], gform
[UINTMAX_STRSIZE_BOUND
];
1009 char size
[2 * UINTMAX_STRSIZE_BOUND
];
1010 /* holds formatted size or major,minor */
1011 char uintbuf
[UINTMAX_STRSIZE_BOUND
];
1014 if (block_number_option
)
1016 char buf
[UINTMAX_STRSIZE_BOUND
];
1017 if (block_ordinal
< 0)
1018 block_ordinal
= current_block_ordinal ();
1019 block_ordinal
-= recent_long_name_blocks
;
1020 block_ordinal
-= recent_long_link_blocks
;
1021 fprintf (stdlis
, _("block %s: "),
1022 STRINGIFY_BIGINT (block_ordinal
, buf
));
1025 if (verbose_option
<= 1)
1027 /* Just the fax, mam. */
1028 fprintf (stdlis
, "%s\n", quotearg (temp_name
));
1032 /* File type and modes. */
1035 switch (current_header
->header
.typeflag
)
1037 case GNUTYPE_VOLHDR
:
1041 case GNUTYPE_MULTIVOL
:
1049 case GNUTYPE_LONGNAME
:
1050 case GNUTYPE_LONGLINK
:
1052 ERROR ((0, 0, _("Visible longname error")));
1055 case GNUTYPE_SPARSE
:
1059 if (temp_name
[strlen (temp_name
) - 1] == '/')
1065 case GNUTYPE_DUMPDIR
:
1088 decode_mode (st
->stat
.st_mode
, modes
+ 1);
1092 time_stamp
= tartime (st
->stat
.st_mtime
);
1094 /* User and group names. */
1096 if (st
->uname
&& current_format
!= V7_FORMAT
1097 && !numeric_owner_option
)
1101 /* Try parsing it as an unsigned integer first, and as a
1102 uid_t if that fails. This method can list positive user
1103 ids that are too large to fit in a uid_t. */
1104 uintmax_t u
= from_header (current_header
->header
.uid
,
1105 sizeof current_header
->header
.uid
, 0,
1107 (uintmax_t) TYPE_MAXIMUM (uintmax_t),
1110 user
= STRINGIFY_BIGINT (u
, uform
);
1113 sprintf (uform
, "%ld",
1114 (long) UID_FROM_HEADER (current_header
->header
.uid
));
1119 if (st
->gname
&& current_format
!= V7_FORMAT
1120 && !numeric_owner_option
)
1124 /* Try parsing it as an unsigned integer first, and as a
1125 gid_t if that fails. This method can list positive group
1126 ids that are too large to fit in a gid_t. */
1127 uintmax_t g
= from_header (current_header
->header
.gid
,
1128 sizeof current_header
->header
.gid
, 0,
1130 (uintmax_t) TYPE_MAXIMUM (uintmax_t),
1133 group
= STRINGIFY_BIGINT (g
, gform
);
1136 sprintf (gform
, "%ld",
1137 (long) GID_FROM_HEADER (current_header
->header
.gid
));
1142 /* Format the file size or major/minor device numbers. */
1144 switch (current_header
->header
.typeflag
)
1149 STRINGIFY_BIGINT (major (st
->stat
.st_rdev
), uintbuf
));
1152 STRINGIFY_BIGINT (minor (st
->stat
.st_rdev
), uintbuf
));
1156 /* st->stat.st_size keeps stored file size */
1157 strcpy (size
, STRINGIFY_BIGINT (st
->stat
.st_size
, uintbuf
));
1161 /* Figure out padding and print the whole line. */
1163 pad
= strlen (user
) + strlen (group
) + strlen (size
) + 1;
1167 fprintf (stdlis
, "%s %s/%s %*s%s %s",
1168 modes
, user
, group
, ugswidth
- pad
, "", size
, time_stamp
);
1170 fprintf (stdlis
, " %s", quotearg (temp_name
));
1172 switch (current_header
->header
.typeflag
)
1175 fprintf (stdlis
, " -> %s\n", quotearg (st
->link_name
));
1179 fprintf (stdlis
, _(" link to %s\n"), quotearg (st
->link_name
));
1184 char type_string
[2];
1185 type_string
[0] = current_header
->header
.typeflag
;
1186 type_string
[1] = '\0';
1187 fprintf (stdlis
, _(" unknown file type %s\n"),
1188 quote (type_string
));
1194 case GNUTYPE_SPARSE
:
1200 case GNUTYPE_DUMPDIR
:
1201 putc ('\n', stdlis
);
1204 case GNUTYPE_LONGLINK
:
1205 fprintf (stdlis
, _("--Long Link--\n"));
1208 case GNUTYPE_LONGNAME
:
1209 fprintf (stdlis
, _("--Long Name--\n"));
1212 case GNUTYPE_VOLHDR
:
1213 fprintf (stdlis
, _("--Volume Header--\n"));
1216 case GNUTYPE_MULTIVOL
:
1219 (UINTMAX_FROM_HEADER (current_header
->oldgnu_header
.offset
),
1221 fprintf (stdlis
, _("--Continued at byte %s--\n"), size
);
1225 fprintf (stdlis
, _("--Mangled file names--\n"));
1232 /* Print a similar line when we make a directory automatically. */
1234 print_for_mkdir (char *dirname
, int length
, mode_t mode
)
1238 if (verbose_option
> 1)
1240 /* File type and modes. */
1243 decode_mode (mode
, modes
+ 1);
1245 if (block_number_option
)
1247 char buf
[UINTMAX_STRSIZE_BOUND
];
1248 fprintf (stdlis
, _("block %s: "),
1249 STRINGIFY_BIGINT (current_block_ordinal (), buf
));
1252 fprintf (stdlis
, "%s %*s %.*s\n", modes
, ugswidth
+ DATEWIDTH
,
1253 _("Creating directory:"), length
, quotearg (dirname
));
1257 /* Skip over SIZE bytes of data in blocks in the archive. */
1259 skip_file (off_t size
)
1263 if (multi_volume_option
)
1265 save_totsize
= size
;
1266 save_sizeleft
= size
;
1269 if (seekable_archive
)
1271 off_t nblk
= seek_archive (size
);
1274 size
-= nblk
* BLOCKSIZE
;
1275 if (multi_volume_option
) /* Argh.. */
1276 save_sizeleft
-= nblk
* BLOCKSIZE
;
1279 seekable_archive
= false;
1284 x
= find_next_block ();
1286 FATAL_ERROR ((0, 0, _("Unexpected EOF in archive")));
1288 set_next_block_after (x
);
1290 if (multi_volume_option
)
1291 save_sizeleft
-= BLOCKSIZE
;
1295 /* Skip the current member in the archive.
1296 NOTE: Current header must be decoded before calling this function. */
1300 char save_typeflag
= current_header
->header
.typeflag
;
1301 set_next_block_after (current_header
);
1303 assign_string (&save_name
, current_stat_info
.file_name
);
1305 if (current_stat_info
.is_sparse
)
1306 sparse_skip_file (¤t_stat_info
);
1307 else if (save_typeflag
!= DIRTYPE
)
1308 skip_file (current_stat_info
.stat
.st_size
);