]> Dogcows Code - chaz/tar/blob - src/common.h
(volume_start_time,last_stat_time): New globals
[chaz/tar] / src / common.h
1 /* Common declarations for the tar program.
2
3 Copyright (C) 1988, 1992, 1993, 1994, 1996, 1997, 1999, 2000, 2001,
4 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
5
6 This program is free software; you can redistribute it and/or modify it
7 under the terms of the GNU General Public License as published by the
8 Free Software Foundation; either version 2, or (at your option) any later
9 version.
10
11 This program is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
14 Public License for more details.
15
16 You should have received a copy of the GNU General Public License along
17 with this program; if not, write to the Free Software Foundation, Inc.,
18 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
19
20 /* Declare the GNU tar archive format. */
21 #include "tar.h"
22
23 /* The checksum field is filled with this while the checksum is computed. */
24 #define CHKBLANKS " " /* 8 blanks, no null */
25
26 /* Some constants from POSIX are given names. */
27 #define NAME_FIELD_SIZE 100
28 #define PREFIX_FIELD_SIZE 155
29 #define UNAME_FIELD_SIZE 32
30 #define GNAME_FIELD_SIZE 32
31
32
33 \f
34 /* Some various global definitions. */
35
36 /* Name of file to use for interacting with user. */
37
38 /* GLOBAL is defined to empty in tar.c only, and left alone in other *.c
39 modules. Here, we merely set it to "extern" if it is not already set.
40 GNU tar does depend on the system loader to preset all GLOBAL variables to
41 neutral (or zero) values, explicit initialization is usually not done. */
42 #ifndef GLOBAL
43 # define GLOBAL extern
44 #endif
45
46 #define TAREXIT_SUCCESS PAXEXIT_SUCCESS
47 #define TAREXIT_DIFFERS PAXEXIT_DIFFERS
48 #define TAREXIT_FAILURE PAXEXIT_FAILURE
49
50 \f
51 #include "arith.h"
52 #include <backupfile.h>
53 #include <exclude.h>
54 #include <full-write.h>
55 #include <modechange.h>
56 #include <quote.h>
57 #include <safe-read.h>
58 #include <stat-time.h>
59 #include <timespec.h>
60 #define obstack_chunk_alloc xmalloc
61 #define obstack_chunk_free free
62 #include <obstack.h>
63
64 #include <paxlib.h>
65
66 /* Log base 2 of common values. */
67 #define LG_8 3
68 #define LG_64 6
69 #define LG_256 8
70 \f
71 /* Information gleaned from the command line. */
72
73 /* Name of this program. */
74 GLOBAL const char *program_name;
75
76 /* Main command option. */
77
78 enum subcommand
79 {
80 UNKNOWN_SUBCOMMAND, /* none of the following */
81 APPEND_SUBCOMMAND, /* -r */
82 CAT_SUBCOMMAND, /* -A */
83 CREATE_SUBCOMMAND, /* -c */
84 DELETE_SUBCOMMAND, /* -D */
85 DIFF_SUBCOMMAND, /* -d */
86 EXTRACT_SUBCOMMAND, /* -x */
87 LIST_SUBCOMMAND, /* -t */
88 UPDATE_SUBCOMMAND /* -u */
89 };
90
91 GLOBAL enum subcommand subcommand_option;
92
93 /* Selected format for output archive. */
94 GLOBAL enum archive_format archive_format;
95
96 /* Either NL or NUL, as decided by the --null option. */
97 GLOBAL char filename_terminator;
98
99 /* Size of each record, once in blocks, once in bytes. Those two variables
100 are always related, the second being BLOCKSIZE times the first. They do
101 not have _option in their name, even if their values is derived from
102 option decoding, as these are especially important in tar. */
103 GLOBAL int blocking_factor;
104 GLOBAL size_t record_size;
105
106 GLOBAL bool absolute_names_option;
107
108 /* Display file times in UTC */
109 GLOBAL bool utc_option;
110
111 /* This variable tells how to interpret newer_mtime_option, below. If zero,
112 files get archived if their mtime is not less than newer_mtime_option.
113 If nonzero, files get archived if *either* their ctime or mtime is not less
114 than newer_mtime_option. */
115 GLOBAL int after_date_option;
116
117 enum atime_preserve
118 {
119 no_atime_preserve,
120 replace_atime_preserve,
121 system_atime_preserve
122 };
123 GLOBAL enum atime_preserve atime_preserve_option;
124
125 GLOBAL bool backup_option;
126
127 /* Type of backups being made. */
128 GLOBAL enum backup_type backup_type;
129
130 GLOBAL bool block_number_option;
131
132 GLOBAL unsigned checkpoint_option;
133
134 enum checkpoint_style
135 {
136 checkpoint_text,
137 checkpoint_dot
138 };
139
140 GLOBAL enum checkpoint_style checkpoint_style;
141
142 /* Specified name of compression program, or "gzip" as implied by -z. */
143 GLOBAL const char *use_compress_program_option;
144
145 GLOBAL bool dereference_option;
146
147 /* Print a message if not all links are dumped */
148 GLOBAL int check_links_option;
149
150 /* Patterns that match file names to be excluded. */
151 GLOBAL struct exclude *excluded;
152
153 /* Exclude directories containing a cache directory tag. */
154 GLOBAL bool exclude_caches_option;
155
156 /* Specified value to be put into tar file in place of stat () results, or
157 just -1 if such an override should not take place. */
158 GLOBAL gid_t group_option;
159
160 GLOBAL bool ignore_failed_read_option;
161
162 GLOBAL bool ignore_zeros_option;
163
164 GLOBAL bool incremental_option;
165
166 /* Specified name of script to run at end of each tape change. */
167 GLOBAL const char *info_script_option;
168
169 GLOBAL bool interactive_option;
170
171 /* If nonzero, extract only Nth occurrence of each named file */
172 GLOBAL uintmax_t occurrence_option;
173
174 enum old_files
175 {
176 DEFAULT_OLD_FILES, /* default */
177 NO_OVERWRITE_DIR_OLD_FILES, /* --no-overwrite-dir */
178 OVERWRITE_OLD_FILES, /* --overwrite */
179 UNLINK_FIRST_OLD_FILES, /* --unlink-first */
180 KEEP_OLD_FILES, /* --keep-old-files */
181 KEEP_NEWER_FILES /* --keep-newer-files */
182 };
183 GLOBAL enum old_files old_files_option;
184
185 /* Specified file name for incremental list. */
186 GLOBAL const char *listed_incremental_option;
187
188 /* Specified mode change string. */
189 GLOBAL struct mode_change *mode_option;
190
191 /* Initial umask, if needed for mode change string. */
192 GLOBAL mode_t initial_umask;
193
194 GLOBAL bool multi_volume_option;
195
196 /* Specified threshold date and time. Files having an older time stamp
197 do not get archived (also see after_date_option above). */
198 GLOBAL struct timespec newer_mtime_option;
199
200 /* Return true if newer_mtime_option is initialized. */
201 #define NEWER_OPTION_INITIALIZED(opt) (0 <= (opt).tv_nsec)
202
203 /* Return true if the struct stat ST's M time is less than
204 newer_mtime_option. */
205 #define OLDER_STAT_TIME(st, m) \
206 (timespec_cmp (get_stat_##m##time (&(st)), newer_mtime_option) < 0)
207
208 /* Likewise, for struct tar_stat_info ST. */
209 #define OLDER_TAR_STAT_TIME(st, m) \
210 (timespec_cmp ((st).m##time, newer_mtime_option) < 0)
211
212 /* Zero if there is no recursion, otherwise FNM_LEADING_DIR. */
213 GLOBAL int recursion_option;
214
215 GLOBAL bool numeric_owner_option;
216
217 GLOBAL bool one_file_system_option;
218
219 /* Specified value to be put into tar file in place of stat () results, or
220 just -1 if such an override should not take place. */
221 GLOBAL uid_t owner_option;
222
223 GLOBAL bool recursive_unlink_option;
224
225 GLOBAL bool read_full_records_option;
226
227 GLOBAL bool remove_files_option;
228
229 /* Specified rmt command. */
230 GLOBAL const char *rmt_command_option;
231
232 /* Specified remote shell command. */
233 GLOBAL const char *rsh_command_option;
234
235 GLOBAL bool same_order_option;
236
237 /* If positive, preserve ownership when extracting. */
238 GLOBAL int same_owner_option;
239
240 /* If positive, preserve permissions when extracting. */
241 GLOBAL int same_permissions_option;
242
243 /* When set, strip the given number of file name components from the file name
244 before extracting */
245 GLOBAL size_t strip_name_components;
246
247 GLOBAL bool show_omitted_dirs_option;
248
249 GLOBAL bool sparse_option;
250
251 GLOBAL bool starting_file_option;
252
253 /* Specified maximum byte length of each tape volume (multiple of 1024). */
254 GLOBAL tarlong tape_length_option;
255
256 GLOBAL bool to_stdout_option;
257
258 GLOBAL bool totals_option;
259
260 GLOBAL bool touch_option;
261
262 GLOBAL char *to_command_option;
263 GLOBAL bool ignore_command_error_option;
264
265 /* Restrict some potentially harmful tar options */
266 GLOBAL bool restrict_option;
267
268 /* Return true if the extracted files are not being written to disk */
269 #define EXTRACT_OVER_PIPE (to_stdout_option || to_command_option)
270
271 /* Count how many times the option has been set, multiple setting yields
272 more verbose behavior. Value 0 means no verbosity, 1 means file name
273 only, 2 means file name and all attributes. More than 2 is just like 2. */
274 GLOBAL int verbose_option;
275
276 GLOBAL bool verify_option;
277
278 /* Specified name of file containing the volume number. */
279 GLOBAL const char *volno_file_option;
280
281 /* Specified value or pattern. */
282 GLOBAL const char *volume_label_option;
283 \f
284 /* Other global variables. */
285
286 /* File descriptor for archive file. */
287 GLOBAL int archive;
288
289 /* Nonzero when outputting to /dev/null. */
290 GLOBAL bool dev_null_output;
291
292 /* Timestamps: */
293 GLOBAL struct timespec start_time; /* when we started execution */
294 GLOBAL struct timespec volume_start_time; /* when the current volume was
295 opened*/
296 GLOBAL struct timespec last_stat_time; /* when the statistics was last
297 computed */
298
299 GLOBAL struct tar_stat_info current_stat_info;
300
301 /* List of tape drive names, number of such tape drives, allocated number,
302 and current cursor in list. */
303 GLOBAL const char **archive_name_array;
304 GLOBAL size_t archive_names;
305 GLOBAL size_t allocated_archive_names;
306 GLOBAL const char **archive_name_cursor;
307
308 /* Output index file name. */
309 GLOBAL char const *index_file_name;
310
311 /* Structure for keeping track of filenames and lists thereof. */
312 struct name
313 {
314 struct name *next; /* Link to the next element */
315 int change_dir; /* Number of the directory to change to.
316 Set with the -C option. */
317 uintmax_t found_count; /* number of times a matching file has
318 been found */
319 int explicit; /* this name was explicitely given in the
320 command line */
321 int matching_flags; /* this name is a regexp, not literal */
322 char const *dir_contents; /* for incremental_option */
323
324 size_t length; /* cached strlen(name) */
325 char name[1];
326 };
327
328 /* Obnoxious test to see if dimwit is trying to dump the archive. */
329 GLOBAL dev_t ar_dev;
330 GLOBAL ino_t ar_ino;
331
332 GLOBAL bool seekable_archive;
333
334 GLOBAL dev_t root_device;
335
336 /* Unquote filenames */
337 GLOBAL bool unquote_option;
338
339 GLOBAL bool test_label_option; /* Test archive volume label and exit */
340
341 /* Show file or archive names after transformation.
342 In particular, when creating archive in verbose mode, list member names
343 as stored in the archive */
344 GLOBAL bool show_transformed_names_option;
345
346 /* Delay setting modification times and permissions of extracted directories
347 until the end of extraction. This variable helps correctly restore directory
348 timestamps from archives with an unusual member order. It is automatically
349 set for incremental archives. */
350 GLOBAL bool delay_directory_restore_option;
351
352 /* Warn about implicit use of the wildcards in command line arguments.
353 (Default for tar prior to 1.15.91, but changed afterwards */
354 GLOBAL bool warn_regex_usage;
355 \f
356 /* Declarations for each module. */
357
358 /* FIXME: compare.c should not directly handle the following variable,
359 instead, this should be done in buffer.c only. */
360
361 enum access_mode
362 {
363 ACCESS_READ,
364 ACCESS_WRITE,
365 ACCESS_UPDATE
366 };
367 extern enum access_mode access_mode;
368
369 /* Module buffer.c. */
370
371 extern FILE *stdlis;
372 extern bool write_archive_to_stdout;
373 extern char *volume_label;
374 extern char *continued_file_name;
375 extern uintmax_t continued_file_size;
376 extern uintmax_t continued_file_offset;
377
378 size_t available_space_after (union block *);
379 off_t current_block_ordinal (void);
380 void close_archive (void);
381 void closeout_volume_number (void);
382 union block *find_next_block (void);
383 void flush_read (void);
384 void flush_write (void);
385 void flush_archive (void);
386 void init_volume_number (void);
387 void open_archive (enum access_mode);
388 void print_total_stats (void);
389 void reset_eof (void);
390 void set_next_block_after (union block *);
391 void clear_read_error_count (void);
392 void xclose (int fd);
393 void archive_write_error (ssize_t) __attribute__ ((noreturn));
394 void archive_read_error (void);
395 off_t seek_archive (off_t size);
396 void set_start_time (void);
397
398 void mv_begin (struct tar_stat_info *st);
399 void mv_end (void);
400 void mv_total_size (off_t size);
401 void mv_size_left (off_t size);
402
403
404 /* Module create.c. */
405
406 enum dump_status
407 {
408 dump_status_ok,
409 dump_status_short,
410 dump_status_fail,
411 dump_status_not_implemented
412 };
413
414 bool file_dumpable_p (struct tar_stat_info *);
415 void create_archive (void);
416 void pad_archive (off_t size_left);
417 void dump_file (const char *, int, dev_t);
418 union block *start_header (struct tar_stat_info *st);
419 void finish_header (struct tar_stat_info *, union block *, off_t);
420 void simple_finish_header (union block *header);
421 union block * write_extended (bool global, struct tar_stat_info *st,
422 union block *old_header);
423 union block *start_private_header (const char *name, size_t size);
424 void write_eot (void);
425 void check_links (void);
426
427 #define GID_TO_CHARS(val, where) gid_to_chars (val, where, sizeof (where))
428 #define MAJOR_TO_CHARS(val, where) major_to_chars (val, where, sizeof (where))
429 #define MINOR_TO_CHARS(val, where) minor_to_chars (val, where, sizeof (where))
430 #define MODE_TO_CHARS(val, where) mode_to_chars (val, where, sizeof (where))
431 #define OFF_TO_CHARS(val, where) off_to_chars (val, where, sizeof (where))
432 #define SIZE_TO_CHARS(val, where) size_to_chars (val, where, sizeof (where))
433 #define TIME_TO_CHARS(val, where) time_to_chars (val, where, sizeof (where))
434 #define UID_TO_CHARS(val, where) uid_to_chars (val, where, sizeof (where))
435 #define UINTMAX_TO_CHARS(val, where) uintmax_to_chars (val, where, sizeof (where))
436 #define UNAME_TO_CHARS(name,buf) string_to_chars (name, buf, sizeof(buf))
437 #define GNAME_TO_CHARS(name,buf) string_to_chars (name, buf, sizeof(buf))
438
439 bool gid_to_chars (gid_t, char *, size_t);
440 bool major_to_chars (major_t, char *, size_t);
441 bool minor_to_chars (minor_t, char *, size_t);
442 bool mode_to_chars (mode_t, char *, size_t);
443 bool off_to_chars (off_t, char *, size_t);
444 bool size_to_chars (size_t, char *, size_t);
445 bool time_to_chars (time_t, char *, size_t);
446 bool uid_to_chars (uid_t, char *, size_t);
447 bool uintmax_to_chars (uintmax_t, char *, size_t);
448 void string_to_chars (char const *, char *, size_t);
449
450 /* Module diffarch.c. */
451
452 extern bool now_verifying;
453
454 void diff_archive (void);
455 void diff_init (void);
456 void verify_volume (void);
457
458 /* Module extract.c. */
459
460 void extr_init (void);
461 void extract_archive (void);
462 void extract_finish (void);
463 bool rename_directory (char *src, char *dst);
464
465 /* Module delete.c. */
466
467 void delete_archive_members (void);
468
469 /* Module incremen.c. */
470
471 char *get_directory_contents (char *, dev_t);
472 const char *append_incremental_renames (const char *dump);
473 void read_directory_file (void);
474 void write_directory_file (void);
475 void purge_directory (char const *);
476 void list_dumpdir (char *buffer, size_t size);
477 void update_parent_directory (const char *name);
478
479 size_t dumpdir_size (const char *p);
480 bool is_dumpdir (struct tar_stat_info *stat_info);
481
482 /* Module list.c. */
483
484 enum read_header
485 {
486 HEADER_STILL_UNREAD, /* for when read_header has not been called */
487 HEADER_SUCCESS, /* header successfully read and checksummed */
488 HEADER_SUCCESS_EXTENDED, /* likewise, but we got an extended header */
489 HEADER_ZERO_BLOCK, /* zero block where header expected */
490 HEADER_END_OF_FILE, /* true end of file while header expected */
491 HEADER_FAILURE /* ill-formed header, or bad checksum */
492 };
493
494 struct xheader
495 {
496 struct obstack *stk;
497 size_t size;
498 char *buffer;
499 };
500
501 GLOBAL struct xheader extended_header;
502 extern union block *current_header;
503 extern enum archive_format current_format;
504 extern size_t recent_long_name_blocks;
505 extern size_t recent_long_link_blocks;
506
507 void decode_header (union block *, struct tar_stat_info *,
508 enum archive_format *, int);
509 char const *tartime (struct timespec, bool);
510
511 #define GID_FROM_HEADER(where) gid_from_header (where, sizeof (where))
512 #define MAJOR_FROM_HEADER(where) major_from_header (where, sizeof (where))
513 #define MINOR_FROM_HEADER(where) minor_from_header (where, sizeof (where))
514 #define MODE_FROM_HEADER(where) mode_from_header (where, sizeof (where))
515 #define OFF_FROM_HEADER(where) off_from_header (where, sizeof (where))
516 #define SIZE_FROM_HEADER(where) size_from_header (where, sizeof (where))
517 #define TIME_FROM_HEADER(where) time_from_header (where, sizeof (where))
518 #define UID_FROM_HEADER(where) uid_from_header (where, sizeof (where))
519 #define UINTMAX_FROM_HEADER(where) uintmax_from_header (where, sizeof (where))
520
521 gid_t gid_from_header (const char *, size_t);
522 major_t major_from_header (const char *, size_t);
523 minor_t minor_from_header (const char *, size_t);
524 mode_t mode_from_header (const char *, size_t);
525 off_t off_from_header (const char *, size_t);
526 size_t size_from_header (const char *, size_t);
527 time_t time_from_header (const char *, size_t);
528 uid_t uid_from_header (const char *, size_t);
529 uintmax_t uintmax_from_header (const char *, size_t);
530
531 void list_archive (void);
532 void print_for_mkdir (char *, int, mode_t);
533 void print_header (struct tar_stat_info *, off_t);
534 void read_and (void (*) (void));
535 enum read_header read_header_primitive (bool raw_extended_headers,
536 struct tar_stat_info *info);
537 enum read_header read_header (bool);
538 enum read_header tar_checksum (union block *header, bool silent);
539 void skip_file (off_t);
540 void skip_member (void);
541
542 /* Module mangle.c. */
543
544 void extract_mangle (void);
545
546 /* Module misc.c. */
547
548 void assign_string (char **, const char *);
549 char *quote_copy_string (const char *);
550 int unquote_string (char *);
551
552 void code_ns_fraction (int, char *);
553 char const *code_timespec (struct timespec, char *);
554 enum { BILLION = 1000000000, LOG10_BILLION = 9 };
555 enum { TIMESPEC_STRSIZE_BOUND =
556 UINTMAX_STRSIZE_BOUND + LOG10_BILLION + sizeof "-." - 1 };
557
558 size_t dot_dot_prefix_len (char const *);
559
560 enum remove_option
561 {
562 ORDINARY_REMOVE_OPTION,
563 RECURSIVE_REMOVE_OPTION,
564
565 /* FIXME: The following value is never used. It seems to be intended
566 as a placeholder for a hypothetical option that should instruct tar
567 to recursively remove subdirectories in purge_directory(),
568 as opposed to the functionality of --recursive-unlink
569 (RECURSIVE_REMOVE_OPTION value), which removes them in
570 prepare_to_extract() phase. However, with the addition of more
571 meta-info to the incremental dumps, this should become unnecessary */
572 WANT_DIRECTORY_REMOVE_OPTION
573 };
574 int remove_any_file (const char *, enum remove_option);
575 bool maybe_backup_file (const char *, int);
576 void undo_last_backup (void);
577
578 int deref_stat (bool, char const *, struct stat *);
579
580 int chdir_arg (char const *);
581 void chdir_do (int);
582
583 void close_diag (char const *name);
584 void open_diag (char const *name);
585 void read_diag_details (char const *name, off_t offset, size_t size);
586 void readlink_diag (char const *name);
587 void savedir_diag (char const *name);
588 void seek_diag_details (char const *, off_t);
589 void stat_diag (char const *name);
590 void write_error_details (char const *, size_t, size_t);
591 void write_fatal (char const *) __attribute__ ((noreturn));
592 void write_fatal_details (char const *, ssize_t, size_t)
593 __attribute__ ((noreturn));
594
595 pid_t xfork (void);
596 void xpipe (int[2]);
597
598 void *page_aligned_alloc (void **, size_t);
599 int set_file_atime (int fd, char const *file,
600 struct timespec const timespec[2]);
601
602 /* Module names.c. */
603
604 extern struct name *gnu_list_name;
605
606 void gid_to_gname (gid_t, char **gname);
607 int gname_to_gid (char const *, gid_t *);
608 void uid_to_uname (uid_t, char **uname);
609 int uname_to_uid (char const *, uid_t *);
610
611 void init_names (void);
612 void name_add_name (const char *, int);
613 void name_add_dir (const char *name);
614 void name_term (void);
615 const char *name_next (int);
616 void name_gather (void);
617 struct name *addname (char const *, int);
618 int name_match (const char *);
619 void names_notfound (void);
620 void collect_and_sort_names (void);
621 struct name *name_scan (const char *, bool);
622 char *name_from_list (void);
623 void blank_name_list (void);
624 char *new_name (const char *, const char *);
625 size_t stripped_prefix_len (char const *file_name, size_t num);
626 bool all_names_found (struct tar_stat_info *);
627
628 bool excluded_name (char const *);
629
630 void add_avoided_name (char const *);
631 bool is_avoided_name (char const *);
632 bool is_individual_file (char const *);
633
634 bool contains_dot_dot (char const *);
635
636 #define ISFOUND(c) ((occurrence_option == 0) ? (c)->found_count : \
637 (c)->found_count == occurrence_option)
638 #define WASFOUND(c) ((occurrence_option == 0) ? (c)->found_count : \
639 (c)->found_count >= occurrence_option)
640
641 /* Module tar.c. */
642
643 void usage (int);
644
645 int confirm (const char *, const char *);
646 void request_stdin (const char *);
647
648 void tar_stat_init (struct tar_stat_info *st);
649 void tar_stat_destroy (struct tar_stat_info *st);
650 void usage (int) __attribute__ ((noreturn));
651 int tar_timespec_cmp (struct timespec a, struct timespec b);
652 const char *archive_format_string (enum archive_format fmt);
653 const char *subcommand_string (enum subcommand c);
654
655 /* Module update.c. */
656
657 extern char *output_start;
658
659 void update_archive (void);
660
661 /* Module xheader.c. */
662
663 void xheader_decode (struct tar_stat_info *);
664 void xheader_decode_global (void);
665 void xheader_store (char const *, struct tar_stat_info const *, void const *);
666 void xheader_read (union block *, size_t);
667 void xheader_write (char type, char *name, struct xheader *xhdr);
668 void xheader_write_global (void);
669 void xheader_finish (struct xheader *);
670 void xheader_destroy (struct xheader *);
671 char *xheader_xhdr_name (struct tar_stat_info *st);
672 char *xheader_ghdr_name (void);
673 void xheader_write (char, char *, struct xheader *);
674 void xheader_write_global (void);
675 void xheader_set_option (char *string);
676 void xheader_string_begin (void);
677 void xheader_string_add (char const *s);
678 void xheader_string_end (char const *keyword);
679 bool xheader_keyword_deleted_p (const char *kw);
680 char *xheader_format_name (struct tar_stat_info *st, const char *fmt,
681 size_t n);
682
683 /* Module system.c */
684
685 void sys_detect_dev_null_output (void);
686 void sys_save_archive_dev_ino (void);
687 void sys_drain_input_pipe (void);
688 void sys_wait_for_child (pid_t);
689 void sys_spawn_shell (void);
690 bool sys_compare_uid (struct stat *a, struct stat *b);
691 bool sys_compare_gid (struct stat *a, struct stat *b);
692 bool sys_file_is_archive (struct tar_stat_info *p);
693 bool sys_compare_links (struct stat *link_data, struct stat *stat_data);
694 int sys_truncate (int fd);
695 pid_t sys_child_open_for_compress (void);
696 pid_t sys_child_open_for_uncompress (void);
697 size_t sys_write_archive_buffer (void);
698 bool sys_get_archive_stat (void);
699 int sys_exec_command (char *file_name, int typechar, struct tar_stat_info *st);
700 void sys_wait_command (void);
701 int sys_exec_info_script (const char **archive_name, int volume_number);
702
703 /* Module compare.c */
704 void report_difference (struct tar_stat_info *st, const char *message, ...);
705
706 /* Module sparse.c */
707 bool sparse_file_p (struct tar_stat_info *);
708 bool sparse_member_p (struct tar_stat_info *);
709 bool sparse_fixup_header (struct tar_stat_info *);
710 enum dump_status sparse_dump_file (int, struct tar_stat_info *);
711 enum dump_status sparse_extract_file (int, struct tar_stat_info *, off_t *);
712 enum dump_status sparse_skip_file (struct tar_stat_info *);
713 bool sparse_diff_file (int, struct tar_stat_info *);
714
715 /* Module utf8.c */
716 bool string_ascii_p (const char *str);
717 bool utf8_convert (bool to_utf, char const *input, char **output);
718
719 /* Module transform.c */
720 void set_transform_expr (const char *expr);
721 bool transform_name (char **pinput);
722 bool transform_name_fp (char **pinput, char *(*fun)(char *));
723
724
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