1 /* Common declarations for the tar program.
3 Copyright (C) 1988, 1992, 1993, 1994, 1996, 1997, 1999, 2000, 2001,
4 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
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
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.
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. */
20 /* Declare the GNU tar archive format. */
23 /* The checksum field is filled with this while the checksum is computed. */
24 #define CHKBLANKS " " /* 8 blanks, no null */
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
34 /* Some various global definitions. */
36 /* Name of file to use for interacting with user. */
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. */
43 # define GLOBAL extern
46 #define TAREXIT_SUCCESS PAXEXIT_SUCCESS
47 #define TAREXIT_DIFFERS PAXEXIT_DIFFERS
48 #define TAREXIT_FAILURE PAXEXIT_FAILURE
52 #include <backupfile.h>
54 #include <full-write.h>
55 #include <modechange.h>
57 #include <safe-read.h>
58 #include <stat-time.h>
60 #define obstack_chunk_alloc xmalloc
61 #define obstack_chunk_free free
66 /* Log base 2 of common values. */
71 /* Information gleaned from the command line. */
73 /* Name of this program. */
74 GLOBAL
const char *program_name
;
76 /* Main command option. */
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 */
91 GLOBAL
enum subcommand subcommand_option
;
93 /* Selected format for output archive. */
94 GLOBAL
enum archive_format archive_format
;
96 /* Either NL or NUL, as decided by the --null option. */
97 GLOBAL
char filename_terminator
;
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
;
106 GLOBAL
bool absolute_names_option
;
108 /* Display file times in UTC */
109 GLOBAL
bool utc_option
;
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
;
120 replace_atime_preserve
,
121 system_atime_preserve
123 GLOBAL
enum atime_preserve atime_preserve_option
;
125 GLOBAL
bool backup_option
;
127 /* Type of backups being made. */
128 GLOBAL
enum backup_type backup_type
;
130 GLOBAL
bool block_number_option
;
132 GLOBAL
unsigned checkpoint_option
;
134 enum checkpoint_style
140 GLOBAL
enum checkpoint_style checkpoint_style
;
142 /* Specified name of compression program, or "gzip" as implied by -z. */
143 GLOBAL
const char *use_compress_program_option
;
145 GLOBAL
bool dereference_option
;
147 /* Print a message if not all links are dumped */
148 GLOBAL
int check_links_option
;
150 /* Patterns that match file names to be excluded. */
151 GLOBAL
struct exclude
*excluded
;
153 /* Exclude directories containing a cache directory tag. */
154 GLOBAL
bool exclude_caches_option
;
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
;
160 GLOBAL
bool ignore_failed_read_option
;
162 GLOBAL
bool ignore_zeros_option
;
164 GLOBAL
bool incremental_option
;
166 /* Specified name of script to run at end of each tape change. */
167 GLOBAL
const char *info_script_option
;
169 GLOBAL
bool interactive_option
;
171 /* If nonzero, extract only Nth occurrence of each named file */
172 GLOBAL
uintmax_t occurrence_option
;
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 */
183 GLOBAL
enum old_files old_files_option
;
185 /* Specified file name for incremental list. */
186 GLOBAL
const char *listed_incremental_option
;
188 /* Specified mode change string. */
189 GLOBAL
struct mode_change
*mode_option
;
191 /* Initial umask, if needed for mode change string. */
192 GLOBAL mode_t initial_umask
;
194 GLOBAL
bool multi_volume_option
;
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
;
200 /* Return true if newer_mtime_option is initialized. */
201 #define NEWER_OPTION_INITIALIZED(opt) (0 <= (opt).tv_nsec)
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)
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)
212 /* Zero if there is no recursion, otherwise FNM_LEADING_DIR. */
213 GLOBAL
int recursion_option
;
215 GLOBAL
bool numeric_owner_option
;
217 GLOBAL
bool one_file_system_option
;
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
;
223 GLOBAL
bool recursive_unlink_option
;
225 GLOBAL
bool read_full_records_option
;
227 GLOBAL
bool remove_files_option
;
229 /* Specified rmt command. */
230 GLOBAL
const char *rmt_command_option
;
232 /* Specified remote shell command. */
233 GLOBAL
const char *rsh_command_option
;
235 GLOBAL
bool same_order_option
;
237 /* If positive, preserve ownership when extracting. */
238 GLOBAL
int same_owner_option
;
240 /* If positive, preserve permissions when extracting. */
241 GLOBAL
int same_permissions_option
;
243 /* When set, strip the given number of file name components from the file name
245 GLOBAL
size_t strip_name_components
;
247 GLOBAL
bool show_omitted_dirs_option
;
249 GLOBAL
bool sparse_option
;
251 GLOBAL
bool starting_file_option
;
253 /* Specified maximum byte length of each tape volume (multiple of 1024). */
254 GLOBAL tarlong tape_length_option
;
256 GLOBAL
bool to_stdout_option
;
258 GLOBAL
bool totals_option
;
260 GLOBAL
bool touch_option
;
262 GLOBAL
char *to_command_option
;
263 GLOBAL
bool ignore_command_error_option
;
265 /* Restrict some potentially harmful tar options */
266 GLOBAL
bool restrict_option
;
268 /* Return true if the extracted files are not being written to disk */
269 #define EXTRACT_OVER_PIPE (to_stdout_option || to_command_option)
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
;
276 GLOBAL
bool verify_option
;
278 /* Specified name of file containing the volume number. */
279 GLOBAL
const char *volno_file_option
;
281 /* Specified value or pattern. */
282 GLOBAL
const char *volume_label_option
;
284 /* Other global variables. */
286 /* File descriptor for archive file. */
289 /* Nonzero when outputting to /dev/null. */
290 GLOBAL
bool dev_null_output
;
293 GLOBAL
struct timespec start_time
; /* when we started execution */
294 GLOBAL
struct timespec volume_start_time
; /* when the current volume was
296 GLOBAL
struct timespec last_stat_time
; /* when the statistics was last
299 GLOBAL
struct tar_stat_info current_stat_info
;
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
;
308 /* Output index file name. */
309 GLOBAL
char const *index_file_name
;
311 /* Structure for keeping track of filenames and lists thereof. */
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
319 int matching_flags
; /* this name is a regexp, not literal */
320 char const *dir_contents
; /* for incremental_option */
322 size_t length
; /* cached strlen(name) */
326 /* Obnoxious test to see if dimwit is trying to dump the archive. */
330 GLOBAL
bool seekable_archive
;
332 GLOBAL dev_t root_device
;
334 /* Unquote filenames */
335 GLOBAL
bool unquote_option
;
337 GLOBAL
bool test_label_option
; /* Test archive volume label and exit */
339 /* Show file or archive names after transformation.
340 In particular, when creating archive in verbose mode, list member names
341 as stored in the archive */
342 GLOBAL
bool show_transformed_names_option
;
344 /* Delay setting modification times and permissions of extracted directories
345 until the end of extraction. This variable helps correctly restore directory
346 timestamps from archives with an unusual member order. It is automatically
347 set for incremental archives. */
348 GLOBAL
bool delay_directory_restore_option
;
350 /* Warn about implicit use of the wildcards in command line arguments.
351 (Default for tar prior to 1.15.91, but changed afterwards */
352 GLOBAL
bool warn_regex_usage
;
354 /* Declarations for each module. */
356 /* FIXME: compare.c should not directly handle the following variable,
357 instead, this should be done in buffer.c only. */
365 extern enum access_mode access_mode
;
367 /* Module buffer.c. */
370 extern bool write_archive_to_stdout
;
371 extern char *volume_label
;
372 extern char *continued_file_name
;
373 extern uintmax_t continued_file_size
;
374 extern uintmax_t continued_file_offset
;
376 size_t available_space_after (union block
*pointer
);
377 off_t
current_block_ordinal (void);
378 void close_archive (void);
379 void closeout_volume_number (void);
380 union block
*find_next_block (void);
381 void flush_read (void);
382 void flush_write (void);
383 void flush_archive (void);
384 void init_volume_number (void);
385 void open_archive (enum access_mode mode
);
386 void print_total_stats (void);
387 void reset_eof (void);
388 void set_next_block_after (union block
*block
);
389 void clear_read_error_count (void);
390 void xclose (int fd
);
391 void archive_write_error (ssize_t status
) __attribute__ ((noreturn
));
392 void archive_read_error (void);
393 off_t
seek_archive (off_t size
);
394 void set_start_time (void);
396 void mv_begin (struct tar_stat_info
*st
);
398 void mv_total_size (off_t size
);
399 void mv_size_left (off_t size
);
402 /* Module create.c. */
409 dump_status_not_implemented
412 bool file_dumpable_p (struct tar_stat_info
*st
);
413 void create_archive (void);
414 void pad_archive (off_t size_left
);
415 void dump_file (const char *st
, int top_level
, dev_t parent_device
);
416 union block
*start_header (struct tar_stat_info
*st
);
417 void finish_header (struct tar_stat_info
*st
, union block
*header
,
418 off_t block_ordinal
);
419 void simple_finish_header (union block
*header
);
420 union block
* write_extended (bool global
, struct tar_stat_info
*st
,
421 union block
*old_header
);
422 union block
*start_private_header (const char *name
, size_t size
);
423 void write_eot (void);
424 void check_links (void);
426 #define GID_TO_CHARS(val, where) gid_to_chars (val, where, sizeof (where))
427 #define MAJOR_TO_CHARS(val, where) major_to_chars (val, where, sizeof (where))
428 #define MINOR_TO_CHARS(val, where) minor_to_chars (val, where, sizeof (where))
429 #define MODE_TO_CHARS(val, where) mode_to_chars (val, where, sizeof (where))
430 #define OFF_TO_CHARS(val, where) off_to_chars (val, where, sizeof (where))
431 #define SIZE_TO_CHARS(val, where) size_to_chars (val, where, sizeof (where))
432 #define TIME_TO_CHARS(val, where) time_to_chars (val, where, sizeof (where))
433 #define UID_TO_CHARS(val, where) uid_to_chars (val, where, sizeof (where))
434 #define UINTMAX_TO_CHARS(val, where) uintmax_to_chars (val, where, sizeof (where))
435 #define UNAME_TO_CHARS(name,buf) string_to_chars (name, buf, sizeof(buf))
436 #define GNAME_TO_CHARS(name,buf) string_to_chars (name, buf, sizeof(buf))
438 bool gid_to_chars (gid_t gid
, char *buf
, size_t size
);
439 bool major_to_chars (major_t m
, char *buf
, size_t size
);
440 bool minor_to_chars (minor_t m
, char *buf
, size_t size
);
441 bool mode_to_chars (mode_t m
, char *buf
, size_t size
);
442 bool off_to_chars (off_t off
, char *buf
, size_t size
);
443 bool size_to_chars (size_t v
, char *buf
, size_t size
);
444 bool time_to_chars (time_t t
, char *buf
, size_t size
);
445 bool uid_to_chars (uid_t uid
, char *buf
, size_t size
);
446 bool uintmax_to_chars (uintmax_t v
, char *buf
, size_t size
);
447 void string_to_chars (char const *s
, char *buf
, size_t size
);
449 /* Module diffarch.c. */
451 extern bool now_verifying
;
453 void diff_archive (void);
454 void diff_init (void);
455 void verify_volume (void);
457 /* Module extract.c. */
459 void extr_init (void);
460 void extract_archive (void);
461 void extract_finish (void);
462 bool rename_directory (char *src
, char *dst
);
464 /* Module delete.c. */
466 void delete_archive_members (void);
468 /* Module incremen.c. */
470 char *get_directory_contents (char *dir_name
, dev_t device
);
471 const char *append_incremental_renames (const char *dump
);
472 void read_directory_file (void);
473 void write_directory_file (void);
474 void purge_directory (char const *directory_name
);
475 void list_dumpdir (char *buffer
, size_t size
);
476 void update_parent_directory (const char *name
);
478 size_t dumpdir_size (const char *p
);
479 bool is_dumpdir (struct tar_stat_info
*stat_info
);
485 HEADER_STILL_UNREAD
, /* for when read_header has not been called */
486 HEADER_SUCCESS
, /* header successfully read and checksummed */
487 HEADER_SUCCESS_EXTENDED
, /* likewise, but we got an extended header */
488 HEADER_ZERO_BLOCK
, /* zero block where header expected */
489 HEADER_END_OF_FILE
, /* true end of file while header expected */
490 HEADER_FAILURE
/* ill-formed header, or bad checksum */
500 GLOBAL
struct xheader extended_header
;
501 extern union block
*current_header
;
502 extern enum archive_format current_format
;
503 extern size_t recent_long_name_blocks
;
504 extern size_t recent_long_link_blocks
;
506 void decode_header (union block
*header
, struct tar_stat_info
*stat_info
,
507 enum archive_format
*format_pointer
, int do_user_group
);
508 char const *tartime (struct timespec t
, bool full_time
);
510 #define GID_FROM_HEADER(where) gid_from_header (where, sizeof (where))
511 #define MAJOR_FROM_HEADER(where) major_from_header (where, sizeof (where))
512 #define MINOR_FROM_HEADER(where) minor_from_header (where, sizeof (where))
513 #define MODE_FROM_HEADER(where) mode_from_header (where, sizeof (where))
514 #define OFF_FROM_HEADER(where) off_from_header (where, sizeof (where))
515 #define SIZE_FROM_HEADER(where) size_from_header (where, sizeof (where))
516 #define TIME_FROM_HEADER(where) time_from_header (where, sizeof (where))
517 #define UID_FROM_HEADER(where) uid_from_header (where, sizeof (where))
518 #define UINTMAX_FROM_HEADER(where) uintmax_from_header (where, sizeof (where))
520 gid_t
gid_from_header (const char *buf
, size_t size
);
521 major_t
major_from_header (const char *buf
, size_t size
);
522 minor_t
minor_from_header (const char *buf
, size_t size
);
523 mode_t
mode_from_header (const char *buf
, size_t size
);
524 off_t
off_from_header (const char *buf
, size_t size
);
525 size_t size_from_header (const char *buf
, size_t size
);
526 time_t time_from_header (const char *buf
, size_t size
);
527 uid_t
uid_from_header (const char *buf
, size_t size
);
528 uintmax_t uintmax_from_header (const char * buf
, size_t size
);
530 void list_archive (void);
531 void print_for_mkdir (char *dirname
, int length
, mode_t mode
);
532 void print_header (struct tar_stat_info
*st
, off_t block_ordinal
);
533 void read_and (void (*do_something
) (void));
534 enum read_header
read_header_primitive (bool raw_extended_headers
,
535 struct tar_stat_info
*info
);
536 enum read_header
read_header (bool raw_extended_headers
);
537 enum read_header
tar_checksum (union block
*header
, bool silent
);
538 void skip_file (off_t size
);
539 void skip_member (void);
541 /* Module mangle.c. */
543 void extract_mangle (void);
547 void assign_string (char **dest
, const char *src
);
548 char *quote_copy_string (const char *str
);
549 int unquote_string (char *str
);
551 void code_ns_fraction (int ns
, char *p
);
552 char const *code_timespec (struct timespec ts
, char *sbuf
);
553 enum { BILLION
= 1000000000, LOG10_BILLION
= 9 };
554 enum { TIMESPEC_STRSIZE_BOUND
=
555 UINTMAX_STRSIZE_BOUND
+ LOG10_BILLION
+ sizeof "-." - 1 };
559 ORDINARY_REMOVE_OPTION
,
560 RECURSIVE_REMOVE_OPTION
,
562 /* FIXME: The following value is never used. It seems to be intended
563 as a placeholder for a hypothetical option that should instruct tar
564 to recursively remove subdirectories in purge_directory(),
565 as opposed to the functionality of --recursive-unlink
566 (RECURSIVE_REMOVE_OPTION value), which removes them in
567 prepare_to_extract() phase. However, with the addition of more
568 meta-info to the incremental dumps, this should become unnecessary */
569 WANT_DIRECTORY_REMOVE_OPTION
571 int remove_any_file (const char *file_name
, enum remove_option option
);
572 bool maybe_backup_file (const char *file_name
, bool this_is_the_archive
);
573 void undo_last_backup (void);
575 int deref_stat (bool deref
, char const *name
, struct stat
*buf
);
577 int chdir_arg (char const *dir
);
578 void chdir_do (int dir
);
580 void close_diag (char const *name
);
581 void open_diag (char const *name
);
582 void read_diag_details (char const *name
, off_t offset
, size_t size
);
583 void readlink_diag (char const *name
);
584 void savedir_diag (char const *name
);
585 void seek_diag_details (char const *name
, off_t offset
);
586 void stat_diag (char const *name
);
587 void write_error_details (char const *name
, size_t status
, size_t size
);
588 void write_fatal (char const *name
) __attribute__ ((noreturn
));
589 void write_fatal_details (char const *name
, ssize_t status
, size_t size
)
590 __attribute__ ((noreturn
));
593 void xpipe (int fd
[2]);
595 void *page_aligned_alloc (void **ptr
, size_t size
);
596 int set_file_atime (int fd
, char const *file
,
597 struct timespec
const timespec
[2]);
599 /* Module names.c. */
601 extern struct name
*gnu_list_name
;
603 void gid_to_gname (gid_t gid
, char **gname
);
604 int gname_to_gid (char const *gname
, gid_t
*pgid
);
605 void uid_to_uname (uid_t uid
, char **uname
);
606 int uname_to_uid (char const *uname
, uid_t
*puid
);
608 void init_names (void);
609 void name_add_name (const char *name
, int matching_flags
);
610 void name_add_dir (const char *name
);
611 void name_term (void);
612 const char *name_next (int change_dirs
);
613 void name_gather (void);
614 struct name
*addname (char const *string
, int change_dir
);
615 bool name_match (const char *name
);
616 void names_notfound (void);
617 void collect_and_sort_names (void);
618 struct name
*name_scan (const char *name
);
619 char *name_from_list (void);
620 void blank_name_list (void);
621 char *new_name (const char *dir_name
, const char *name
);
622 size_t stripped_prefix_len (char const *file_name
, size_t num
);
623 bool all_names_found (struct tar_stat_info
*st
);
625 bool excluded_name (char const *name
);
627 void add_avoided_name (char const *name
);
628 bool is_avoided_name (char const *name
);
629 bool is_individual_file (char const *name
);
631 bool contains_dot_dot (char const *name
);
633 #define ISFOUND(c) ((occurrence_option == 0) ? (c)->found_count : \
634 (c)->found_count == occurrence_option)
635 #define WASFOUND(c) ((occurrence_option == 0) ? (c)->found_count : \
636 (c)->found_count >= occurrence_option)
642 int confirm (const char *message_action
, const char *name
);
643 void request_stdin (const char *option
);
645 void tar_stat_init (struct tar_stat_info
*st
);
646 void tar_stat_destroy (struct tar_stat_info
*st
);
647 void usage (int) __attribute__ ((noreturn
));
648 int tar_timespec_cmp (struct timespec a
, struct timespec b
);
649 const char *archive_format_string (enum archive_format fmt
);
650 const char *subcommand_string (enum subcommand c
);
652 /* Module update.c. */
654 extern char *output_start
;
656 void update_archive (void);
658 /* Module xheader.c. */
660 void xheader_decode (struct tar_stat_info
*stat
);
661 void xheader_decode_global (void);
662 void xheader_store (char const *keyword
, struct tar_stat_info
const *st
,
664 void xheader_read (union block
*header
, size_t size
);
665 void xheader_write (char type
, char *name
, struct xheader
*xhdr
);
666 void xheader_write_global (void);
667 void xheader_finish (struct xheader
*hdr
);
668 void xheader_destroy (struct xheader
*hdr
);
669 char *xheader_xhdr_name (struct tar_stat_info
*st
);
670 char *xheader_ghdr_name (void);
671 void xheader_write (char type
, char *name
, struct xheader
*xhdr
);
672 void xheader_write_global (void);
673 void xheader_set_option (char *string
);
674 void xheader_string_begin (void);
675 void xheader_string_add (char const *s
);
676 void xheader_string_end (char const *keyword
);
677 bool xheader_keyword_deleted_p (const char *kw
);
678 char *xheader_format_name (struct tar_stat_info
*st
, const char *fmt
,
681 /* Module system.c */
683 void sys_detect_dev_null_output (void);
684 void sys_save_archive_dev_ino (void);
685 void sys_drain_input_pipe (void);
686 void sys_wait_for_child (pid_t
);
687 void sys_spawn_shell (void);
688 bool sys_compare_uid (struct stat
*a
, struct stat
*b
);
689 bool sys_compare_gid (struct stat
*a
, struct stat
*b
);
690 bool sys_file_is_archive (struct tar_stat_info
*p
);
691 bool sys_compare_links (struct stat
*link_data
, struct stat
*stat_data
);
692 int sys_truncate (int fd
);
693 pid_t
sys_child_open_for_compress (void);
694 pid_t
sys_child_open_for_uncompress (void);
695 size_t sys_write_archive_buffer (void);
696 bool sys_get_archive_stat (void);
697 int sys_exec_command (char *file_name
, int typechar
, struct tar_stat_info
*st
);
698 void sys_wait_command (void);
699 int sys_exec_info_script (const char **archive_name
, int volume_number
);
701 /* Module compare.c */
702 void report_difference (struct tar_stat_info
*st
, const char *message
, ...);
704 /* Module sparse.c */
705 bool sparse_file_p (struct tar_stat_info
*st
);
706 bool sparse_member_p (struct tar_stat_info
*st
);
707 bool sparse_fixup_header (struct tar_stat_info
*st
);
708 enum dump_status
sparse_dump_file (int, struct tar_stat_info
*st
);
709 enum dump_status
sparse_extract_file (int fd
, struct tar_stat_info
*st
,
711 enum dump_status
sparse_skip_file (struct tar_stat_info
*st
);
712 bool sparse_diff_file (int, struct tar_stat_info
*st
);
715 bool string_ascii_p (const char *str
);
716 bool utf8_convert (bool to_utf
, char const *input
, char **output
);
718 /* Module transform.c */
719 void set_transform_expr (const char *expr
);
720 bool transform_name (char **pinput
);
721 bool transform_name_fp (char **pinput
, char *(*fun
)(char *));