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, 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), true, 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)
341 union block *header_copy;
343 union block *data_block;
344 size_t size, written;
345 union block *next_long_name = 0;
346 union block *next_long_link = 0;
347 size_t next_long_name_blocks;
348 size_t next_long_link_blocks;
352 enum read_header status;
354 header = find_next_block ();
355 current_header = header;
357 return HEADER_END_OF_FILE;
359 if ((status = tar_checksum (header, false)) != HEADER_SUCCESS)
362 /* Good block. Decode file size and return. */
364 if (header->header.typeflag == LNKTYPE)
365 current_stat_info.stat.st_size = 0; /* links 0 size on tape */
367 current_stat_info.stat.st_size = OFF_FROM_HEADER (header->header.size);
369 if (header->header.typeflag == GNUTYPE_LONGNAME
370 || header->header.typeflag == GNUTYPE_LONGLINK
371 || header->header.typeflag == XHDTYPE
372 || header->header.typeflag == XGLTYPE)
374 if (raw_extended_headers)
375 return HEADER_SUCCESS_EXTENDED;
376 else if (header->header.typeflag == GNUTYPE_LONGNAME
377 || header->header.typeflag == GNUTYPE_LONGLINK)
379 size_t name_size = current_stat_info.stat.st_size;
380 size_t n = name_size % BLOCKSIZE;
381 size = name_size + BLOCKSIZE;
383 size += BLOCKSIZE - n;
385 if (name_size != current_stat_info.stat.st_size
389 header_copy = xmalloc (size + 1);
391 if (header->header.typeflag == GNUTYPE_LONGNAME)
394 free (next_long_name);
395 next_long_name = header_copy;
396 next_long_name_blocks = size / BLOCKSIZE;
401 free (next_long_link);
402 next_long_link = header_copy;
403 next_long_link_blocks = size / BLOCKSIZE;
406 set_next_block_after (header);
407 *header_copy = *header;
408 bp = header_copy->buffer + BLOCKSIZE;
410 for (size -= BLOCKSIZE; size > 0; size -= written)
412 data_block = find_next_block ();
415 ERROR ((0, 0, _("Unexpected EOF in archive")));
418 written = available_space_after (data_block);
422 memcpy (bp, data_block->buffer, written);
424 set_next_block_after ((union block *)
425 (data_block->buffer + written - 1));
430 else if (header->header.typeflag == XHDTYPE)
431 xheader_read (header, OFF_FROM_HEADER (header->header.size));
432 else if (header->header.typeflag == XGLTYPE)
434 xheader_read (header, OFF_FROM_HEADER (header->header.size));
435 xheader_decode_global ();
444 struct posix_header const *h = ¤t_header->header;
445 char namebuf[sizeof h->prefix + 1 + NAME_FIELD_SIZE + 1];
447 if (recent_long_name)
448 free (recent_long_name);
452 name = next_long_name->buffer + BLOCKSIZE;
453 recent_long_name = next_long_name;
454 recent_long_name_blocks = next_long_name_blocks;
458 /* Accept file names as specified by POSIX.1-1996
462 if (h->prefix[0] && strcmp (h->magic, TMAGIC) == 0)
464 memcpy (np, h->prefix, sizeof h->prefix);
465 np[sizeof h->prefix] = '\0';
469 /* Prevent later references to current_header from
470 mistakenly treating this as an old GNU header.
471 This assignment invalidates h->prefix. */
472 current_header->oldgnu_header.isextended = 0;
474 memcpy (np, h->name, sizeof h->name);
475 np[sizeof h->name] = '\0';
477 recent_long_name = 0;
478 recent_long_name_blocks = 0;
480 assign_string (¤t_stat_info.orig_file_name, name);
481 assign_string (¤t_stat_info.file_name, name);
482 current_stat_info.had_trailing_slash = strip_trailing_slashes (current_stat_info.file_name);
484 if (recent_long_link)
485 free (recent_long_link);
489 name = next_long_link->buffer + BLOCKSIZE;
490 recent_long_link = next_long_link;
491 recent_long_link_blocks = next_long_link_blocks;
495 memcpy (namebuf, h->linkname, sizeof h->linkname);
496 namebuf[sizeof h->linkname] = '\0';
498 recent_long_link = 0;
499 recent_long_link_blocks = 0;
501 assign_string (¤t_stat_info.link_name, name);
503 return HEADER_SUCCESS;
508 #define ISOCTAL(c) ((c)>='0'&&(c)<='7')
510 /* Decode things from a file HEADER block into STAT_INFO, also setting
511 *FORMAT_POINTER depending on the header block format. If
512 DO_USER_GROUP, decode the user/group information (this is useful
513 for extraction, but waste time when merely listing).
515 read_header() has already decoded the checksum and length, so we don't.
517 This routine should *not* be called twice for the same block, since
518 the two calls might use different DO_USER_GROUP values and thus
519 might end up with different uid/gid for the two calls. If anybody
520 wants the uid/gid they should decode it first, and other callers
521 should decode it without uid/gid before calling a routine,
522 e.g. print_header, that assumes decoded data. */
524 decode_header (union block *header, struct tar_stat_info *stat_info,
525 enum archive_format *format_pointer, int do_user_group)
527 enum archive_format format;
529 if (strcmp (header->header.magic, TMAGIC) == 0)
531 if (header->star_header.prefix[130] == 0
532 && ISOCTAL (header->star_header.atime[0])
533 && header->star_header.atime[11] == ' '
534 && ISOCTAL (header->star_header.ctime[0])
535 && header->star_header.ctime[11] == ' ')
536 format = STAR_FORMAT;
537 else if (extended_header.size)
538 format = POSIX_FORMAT;
540 format = USTAR_FORMAT;
542 else if (strcmp (header->header.magic, OLDGNU_MAGIC) == 0)
543 format = OLDGNU_FORMAT;
546 *format_pointer = format;
548 stat_info->stat.st_mode = MODE_FROM_HEADER (header->header.mode);
549 stat_info->stat.st_mtime = TIME_FROM_HEADER (header->header.mtime);
550 assign_string (&stat_info->uname,
551 header->header.uname[0] ? header->header.uname : NULL);
552 assign_string (&stat_info->gname,
553 header->header.gname[0] ? header->header.gname : NULL);
554 stat_info->devmajor = MAJOR_FROM_HEADER (header->header.devmajor);
555 stat_info->devminor = MINOR_FROM_HEADER (header->header.devminor);
557 stat_info->stat.st_atime = start_time;
558 stat_info->stat.st_ctime = start_time;
560 if (format == OLDGNU_FORMAT && incremental_option)
562 stat_info->stat.st_atime = TIME_FROM_HEADER (header->oldgnu_header.atime);
563 stat_info->stat.st_ctime = TIME_FROM_HEADER (header->oldgnu_header.ctime);
566 if (format == V7_FORMAT)
568 stat_info->stat.st_uid = UID_FROM_HEADER (header->header.uid);
569 stat_info->stat.st_gid = GID_FROM_HEADER (header->header.gid);
570 stat_info->stat.st_rdev = 0;
575 if (format == STAR_FORMAT)
577 stat_info->stat.st_atime = TIME_FROM_HEADER (header->star_header.atime);
578 stat_info->stat.st_ctime = TIME_FROM_HEADER (header->star_header.ctime);
583 /* FIXME: Decide if this should somewhat depend on -p. */
585 if (numeric_owner_option
586 || !*header->header.uname
587 || !uname_to_uid (header->header.uname, &stat_info->stat.st_uid))
588 stat_info->stat.st_uid = UID_FROM_HEADER (header->header.uid);
590 if (numeric_owner_option
591 || !*header->header.gname
592 || !gname_to_gid (header->header.gname, &stat_info->stat.st_gid))
593 stat_info->stat.st_gid = GID_FROM_HEADER (header->header.gid);
596 switch (header->header.typeflag)
600 stat_info->stat.st_rdev = makedev (stat_info->devmajor,
601 stat_info->devminor);
605 stat_info->stat.st_rdev = 0;
609 stat_info->archive_file_size = stat_info->stat.st_size;
610 xheader_decode (stat_info);
612 if (sparse_member_p (stat_info))
614 sparse_fixup_header (stat_info);
615 stat_info->is_sparse = true;
618 stat_info->is_sparse = false;
621 /* Convert buffer at WHERE0 of size DIGS from external format to
622 uintmax_t. DIGS must be positive. If TYPE is nonnull, the data
623 are of type TYPE. The buffer must represent a value in the range
624 -MINUS_MINVAL through MAXVAL. If OCTAL_ONLY, allow only octal
625 numbers instead of the other GNU extensions. Return -1 on error,
626 diagnosing the error if TYPE is nonnull and if !SILENT. */
628 from_header (char const *where0, size_t digs, char const *type,
629 uintmax_t minus_minval, uintmax_t maxval,
630 bool octal_only, 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));
722 /* Suppress the following extensions. */
724 else if (*where == '-' || *where == '+')
726 /* Parse base-64 output produced only by tar test versions
727 1.13.6 (1999-08-11) through 1.13.11 (1999-08-23).
728 Support for this will be withdrawn in future releases. */
732 static bool warned_once;
736 WARN ((0, 0, _("Archive contains obsolescent base-64 headers")));
739 negative = *where++ == '-';
741 && (dig = base64_map[(unsigned char) *where]) < 64)
743 if (value << LG_64 >> LG_64 != value)
745 char *string = alloca (digs + 1);
746 memcpy (string, where0, digs);
750 _("Archive signed base-64 string %s is out of %s range"),
751 quote (string), type));
754 value = (value << LG_64) | dig;
758 else if (*where == '\200' /* positive base-256 */
759 || *where == '\377' /* negative base-256 */)
761 /* Parse base-256 output. A nonnegative number N is
762 represented as (256**DIGS)/2 + N; a negative number -N is
763 represented as (256**DIGS) - N, i.e. as two's complement.
764 The representation guarantees that the leading bit is
765 always on, so that we don't confuse this format with the
766 others (assuming ASCII bytes of 8 bits or more). */
767 int signbit = *where & (1 << (LG_256 - 2));
768 uintmax_t topbits = (((uintmax_t) - signbit)
769 << (CHAR_BIT * sizeof (uintmax_t)
770 - LG_256 - (LG_256 - 2)));
771 value = (*where++ & ((1 << (LG_256 - 2)) - 1)) - signbit;
774 value = (value << LG_256) + (unsigned char) *where++;
777 if (((value << LG_256 >> LG_256) | topbits) != value)
781 _("Archive base-256 value is out of %s range"),
791 if (where != lim && *where && !ISSPACE ((unsigned char) *where))
795 char buf[1000]; /* Big enough to represent any header. */
796 static struct quoting_options *o;
800 o = clone_quoting_options (0);
801 set_quoting_style (o, locale_quoting_style);
804 while (where0 != lim && ! lim[-1])
806 quotearg_buffer (buf, sizeof buf, where0, lim - where, o);
809 /* TRANSLATORS: Second %s is a type name (gid_t,uid_t,etc.) */
810 _("Archive contains %.*s where numeric %s value expected"),
811 (int) sizeof buf, buf, type));
817 if (value <= (negative ? minus_minval : maxval))
818 return negative ? -value : value;
822 char minval_buf[UINTMAX_STRSIZE_BOUND + 1];
823 char maxval_buf[UINTMAX_STRSIZE_BOUND];
824 char value_buf[UINTMAX_STRSIZE_BOUND + 1];
825 char *minval_string = STRINGIFY_BIGINT (minus_minval, minval_buf + 1);
826 char *value_string = STRINGIFY_BIGINT (value, value_buf + 1);
828 *--value_string = '-';
830 *--minval_string = '-';
831 /* TRANSLATORS: Second %s is type name (gid_t,uid_t,etc.) */
832 ERROR ((0, 0, _("Archive value %s is out of %s range %s..%s"),
834 minval_string, STRINGIFY_BIGINT (maxval, maxval_buf)));
841 gid_from_header (const char *p, size_t s)
843 return from_header (p, s, "gid_t",
844 - (uintmax_t) TYPE_MINIMUM (gid_t),
845 (uintmax_t) TYPE_MAXIMUM (gid_t),
850 major_from_header (const char *p, size_t s)
852 return from_header (p, s, "major_t",
853 - (uintmax_t) TYPE_MINIMUM (major_t),
854 (uintmax_t) TYPE_MAXIMUM (major_t), false, false);
858 minor_from_header (const char *p, size_t s)
860 return from_header (p, s, "minor_t",
861 - (uintmax_t) TYPE_MINIMUM (minor_t),
862 (uintmax_t) TYPE_MAXIMUM (minor_t), false, false);
866 mode_from_header (const char *p, size_t s)
868 /* Do not complain about unrecognized mode bits. */
869 unsigned u = from_header (p, s, "mode_t",
870 - (uintmax_t) TYPE_MINIMUM (mode_t),
871 TYPE_MAXIMUM (uintmax_t), false, false);
872 return ((u & TSUID ? S_ISUID : 0)
873 | (u & TSGID ? S_ISGID : 0)
874 | (u & TSVTX ? S_ISVTX : 0)
875 | (u & TUREAD ? S_IRUSR : 0)
876 | (u & TUWRITE ? S_IWUSR : 0)
877 | (u & TUEXEC ? S_IXUSR : 0)
878 | (u & TGREAD ? S_IRGRP : 0)
879 | (u & TGWRITE ? S_IWGRP : 0)
880 | (u & TGEXEC ? S_IXGRP : 0)
881 | (u & TOREAD ? S_IROTH : 0)
882 | (u & TOWRITE ? S_IWOTH : 0)
883 | (u & TOEXEC ? S_IXOTH : 0));
887 off_from_header (const char *p, size_t s)
889 /* Negative offsets are not allowed in tar files, so invoke
890 from_header with minimum value 0, not TYPE_MINIMUM (off_t). */
891 return from_header (p, s, "off_t", (uintmax_t) 0,
892 (uintmax_t) TYPE_MAXIMUM (off_t), false, false);
896 size_from_header (const char *p, size_t s)
898 return from_header (p, s, "size_t", (uintmax_t) 0,
899 (uintmax_t) TYPE_MAXIMUM (size_t), false, false);
903 time_from_header (const char *p, size_t s)
905 return from_header (p, s, "time_t",
906 - (uintmax_t) TYPE_MINIMUM (time_t),
907 (uintmax_t) TYPE_MAXIMUM (time_t), false, false);
911 uid_from_header (const char *p, size_t s)
913 return from_header (p, s, "uid_t",
914 - (uintmax_t) TYPE_MINIMUM (uid_t),
915 (uintmax_t) TYPE_MAXIMUM (uid_t), false, false);
919 uintmax_from_header (const char *p, size_t s)
921 return from_header (p, s, "uintmax_t", (uintmax_t) 0,
922 TYPE_MAXIMUM (uintmax_t), false, false);
926 /* Format O as a null-terminated decimal string into BUF _backwards_;
927 return pointer to start of result. */
929 stringify_uintmax_t_backwards (uintmax_t o, char *buf)
933 *--buf = '0' + (int) (o % 10);
934 while ((o /= 10) != 0);
938 /* Return a printable representation of T. The result points to
939 static storage that can be reused in the next call to this
940 function, to ctime, or to asctime. */
944 static char buffer[max (UINTMAX_STRSIZE_BOUND + 1,
945 INT_STRLEN_BOUND (int) + 16)];
952 char const *time_stamp = p + 4;
953 for (p += 16; p[3] != '\n'; p++)
959 /* Use ISO 8610 format. See:
960 http://www.cl.cam.ac.uk/~mgk25/iso-time.html */
961 struct tm *tm = utc_option ? gmtime (&t) : localtime (&t);
964 sprintf (buffer, "%04ld-%02d-%02d %02d:%02d:%02d",
965 tm->tm_year + 1900L, tm->tm_mon + 1, tm->tm_mday,
966 tm->tm_hour, tm->tm_min, tm->tm_sec);
971 /* The time stamp cannot be broken down, most likely because it
972 is out of range. Convert it as an integer,
973 right-adjusted in a field with the same width as the usual
974 19-byte 4-year ISO time format. */
975 p = stringify_uintmax_t_backwards (t < 0 ? - (uintmax_t) t : (uintmax_t) t,
976 buffer + sizeof buffer);
979 while (buffer + sizeof buffer - 19 - 1 < p)
984 /* Actually print it.
986 Plain and fancy file header block logging. Non-verbose just prints
987 the name, e.g. for "tar t" or "tar x". This should just contain
988 file names, so it can be fed back into tar with xargs or the "-T"
989 option. The verbose option can give a bunch of info, one line per
990 file. I doubt anybody tries to parse its format, or if they do,
991 they shouldn't. Unix tar is pretty random here anyway. */
994 /* FIXME: Note that print_header uses the globals HEAD, HSTAT, and
995 HEAD_STANDARD, which must be set up in advance. Not very clean.. */
997 /* UGSWIDTH starts with 18, so with user and group names <= 8 chars, the
998 columns never shift during the listing. */
1000 static int ugswidth = UGSWIDTH; /* maximum width encountered so far */
1002 /* DATEWIDTH is the number of columns taken by the date and time fields. */
1004 # define DATEWIDTH 19
1006 # define DATEWIDTH 18
1010 print_header (struct tar_stat_info *st, off_t block_ordinal)
1013 char const *time_stamp;
1014 char *temp_name = st->orig_file_name ? st->orig_file_name : st->file_name;
1016 /* These hold formatted ints. */
1017 char uform[UINTMAX_STRSIZE_BOUND], gform[UINTMAX_STRSIZE_BOUND];
1019 char size[2 * UINTMAX_STRSIZE_BOUND];
1020 /* holds formatted size or major,minor */
1021 char uintbuf[UINTMAX_STRSIZE_BOUND];
1024 if (block_number_option)
1026 char buf[UINTMAX_STRSIZE_BOUND];
1027 if (block_ordinal < 0)
1028 block_ordinal = current_block_ordinal ();
1029 block_ordinal -= recent_long_name_blocks;
1030 block_ordinal -= recent_long_link_blocks;
1031 fprintf (stdlis, _("block %s: "),
1032 STRINGIFY_BIGINT (block_ordinal, buf));
1035 if (verbose_option <= 1)
1037 /* Just the fax, mam. */
1038 fprintf (stdlis, "%s\n", quotearg (temp_name));
1042 /* File type and modes. */
1045 switch (current_header->header.typeflag)
1047 case GNUTYPE_VOLHDR:
1051 case GNUTYPE_MULTIVOL:
1059 case GNUTYPE_LONGNAME:
1060 case GNUTYPE_LONGLINK:
1062 ERROR ((0, 0, _("Unexpected long name header")));
1065 case GNUTYPE_SPARSE:
1069 if (temp_name[strlen (temp_name) - 1] == '/')
1075 case GNUTYPE_DUMPDIR:
1098 decode_mode (st->stat.st_mode, modes + 1);
1102 time_stamp = tartime (st->stat.st_mtime);
1104 /* User and group names. */
1106 if (st->uname && current_format != V7_FORMAT
1107 && !numeric_owner_option)
1111 /* Try parsing it as an unsigned integer first, and as a
1112 uid_t if that fails. This method can list positive user
1113 ids that are too large to fit in a uid_t. */
1114 uintmax_t u = from_header (current_header->header.uid,
1115 sizeof current_header->header.uid, 0,
1117 (uintmax_t) TYPE_MAXIMUM (uintmax_t),
1120 user = STRINGIFY_BIGINT (u, uform);
1123 sprintf (uform, "%ld",
1124 (long) UID_FROM_HEADER (current_header->header.uid));
1129 if (st->gname && current_format != V7_FORMAT
1130 && !numeric_owner_option)
1134 /* Try parsing it as an unsigned integer first, and as a
1135 gid_t if that fails. This method can list positive group
1136 ids that are too large to fit in a gid_t. */
1137 uintmax_t g = from_header (current_header->header.gid,
1138 sizeof current_header->header.gid, 0,
1140 (uintmax_t) TYPE_MAXIMUM (uintmax_t),
1143 group = STRINGIFY_BIGINT (g, gform);
1146 sprintf (gform, "%ld",
1147 (long) GID_FROM_HEADER (current_header->header.gid));
1152 /* Format the file size or major/minor device numbers. */
1154 switch (current_header->header.typeflag)
1159 STRINGIFY_BIGINT (major (st->stat.st_rdev), uintbuf));
1162 STRINGIFY_BIGINT (minor (st->stat.st_rdev), uintbuf));
1166 /* st->stat.st_size keeps stored file size */
1167 strcpy (size, STRINGIFY_BIGINT (st->stat.st_size, uintbuf));
1171 /* Figure out padding and print the whole line. */
1173 pad = strlen (user) + strlen (group) + strlen (size) + 1;
1177 fprintf (stdlis, "%s %s/%s %*s%s %s",
1178 modes, user, group, ugswidth - pad, "", size, time_stamp);
1180 fprintf (stdlis, " %s", quotearg (temp_name));
1182 switch (current_header->header.typeflag)
1185 fprintf (stdlis, " -> %s\n", quotearg (st->link_name));
1189 fprintf (stdlis, _(" link to %s\n"), quotearg (st->link_name));
1194 char type_string[2];
1195 type_string[0] = current_header->header.typeflag;
1196 type_string[1] = '\0';
1197 fprintf (stdlis, _(" unknown file type %s\n"),
1198 quote (type_string));
1204 case GNUTYPE_SPARSE:
1210 case GNUTYPE_DUMPDIR:
1211 putc ('\n', stdlis);
1214 case GNUTYPE_LONGLINK:
1215 fprintf (stdlis, _("--Long Link--\n"));
1218 case GNUTYPE_LONGNAME:
1219 fprintf (stdlis, _("--Long Name--\n"));
1222 case GNUTYPE_VOLHDR:
1223 fprintf (stdlis, _("--Volume Header--\n"));
1226 case GNUTYPE_MULTIVOL:
1229 (UINTMAX_FROM_HEADER (current_header->oldgnu_header.offset),
1231 fprintf (stdlis, _("--Continued at byte %s--\n"), size);
1235 fprintf (stdlis, _("--Mangled file names--\n"));
1242 /* Print a similar line when we make a directory automatically. */
1244 print_for_mkdir (char *dirname, int length, mode_t mode)
1248 if (verbose_option > 1)
1250 /* File type and modes. */
1253 decode_mode (mode, modes + 1);
1255 if (block_number_option)
1257 char buf[UINTMAX_STRSIZE_BOUND];
1258 fprintf (stdlis, _("block %s: "),
1259 STRINGIFY_BIGINT (current_block_ordinal (), buf));
1262 fprintf (stdlis, "%s %*s %.*s\n", modes, ugswidth + DATEWIDTH,
1263 _("Creating directory:"), length, quotearg (dirname));
1267 /* Skip over SIZE bytes of data in blocks in the archive. */
1269 skip_file (off_t size)
1273 if (multi_volume_option)
1275 save_totsize = size;
1276 save_sizeleft = size;
1279 if (seekable_archive)
1281 off_t nblk = seek_archive (size);
1284 size -= nblk * BLOCKSIZE;
1285 if (multi_volume_option) /* Argh.. */
1286 save_sizeleft -= nblk * BLOCKSIZE;
1289 seekable_archive = false;
1294 x = find_next_block ();
1296 FATAL_ERROR ((0, 0, _("Unexpected EOF in archive")));
1298 set_next_block_after (x);
1300 if (multi_volume_option)
1301 save_sizeleft -= BLOCKSIZE;
1305 /* Skip the current member in the archive.
1306 NOTE: Current header must be decoded before calling this function. */
1310 char save_typeflag = current_header->header.typeflag;
1311 set_next_block_after (current_header);
1313 assign_string (&save_name, current_stat_info.file_name);
1315 if (current_stat_info.is_sparse)
1316 sparse_skip_file (¤t_stat_info);
1317 else if (save_typeflag != DIRTYPE)
1318 skip_file (current_stat_info.stat.st_size);