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 /* If true, override actual mtime (see below) */
201 GLOBAL
bool set_mtime_option
;
202 /* Value to be put in mtime header field instead of the actual mtime */
203 GLOBAL
struct timespec mtime_option
;
205 /* Return true if newer_mtime_option is initialized. */
206 #define NEWER_OPTION_INITIALIZED(opt) (0 <= (opt).tv_nsec)
208 /* Return true if the struct stat ST's M time is less than
209 newer_mtime_option. */
210 #define OLDER_STAT_TIME(st, m) \
211 (timespec_cmp (get_stat_##m##time (&(st)), newer_mtime_option) < 0)
213 /* Likewise, for struct tar_stat_info ST. */
214 #define OLDER_TAR_STAT_TIME(st, m) \
215 (timespec_cmp ((st).m##time, newer_mtime_option) < 0)
217 /* Zero if there is no recursion, otherwise FNM_LEADING_DIR. */
218 GLOBAL
int recursion_option
;
220 GLOBAL
bool numeric_owner_option
;
222 GLOBAL
bool one_file_system_option
;
224 /* Specified value to be put into tar file in place of stat () results, or
225 just -1 if such an override should not take place. */
226 GLOBAL uid_t owner_option
;
228 GLOBAL
bool recursive_unlink_option
;
230 GLOBAL
bool read_full_records_option
;
232 GLOBAL
bool remove_files_option
;
234 /* Specified rmt command. */
235 GLOBAL
const char *rmt_command_option
;
237 /* Specified remote shell command. */
238 GLOBAL
const char *rsh_command_option
;
240 GLOBAL
bool same_order_option
;
242 /* If positive, preserve ownership when extracting. */
243 GLOBAL
int same_owner_option
;
245 /* If positive, preserve permissions when extracting. */
246 GLOBAL
int same_permissions_option
;
248 /* When set, strip the given number of file name components from the file name
250 GLOBAL
size_t strip_name_components
;
252 GLOBAL
bool show_omitted_dirs_option
;
254 GLOBAL
bool sparse_option
;
255 GLOBAL
unsigned tar_sparse_major
;
256 GLOBAL
unsigned tar_sparse_minor
;
258 GLOBAL
bool starting_file_option
;
260 /* Specified maximum byte length of each tape volume (multiple of 1024). */
261 GLOBAL tarlong tape_length_option
;
263 GLOBAL
bool to_stdout_option
;
265 GLOBAL
bool totals_option
;
267 GLOBAL
bool touch_option
;
269 GLOBAL
char *to_command_option
;
270 GLOBAL
bool ignore_command_error_option
;
272 /* Restrict some potentially harmful tar options */
273 GLOBAL
bool restrict_option
;
275 /* Return true if the extracted files are not being written to disk */
276 #define EXTRACT_OVER_PIPE (to_stdout_option || to_command_option)
278 /* Count how many times the option has been set, multiple setting yields
279 more verbose behavior. Value 0 means no verbosity, 1 means file name
280 only, 2 means file name and all attributes. More than 2 is just like 2. */
281 GLOBAL
int verbose_option
;
283 GLOBAL
bool verify_option
;
285 /* Specified name of file containing the volume number. */
286 GLOBAL
const char *volno_file_option
;
288 /* Specified value or pattern. */
289 GLOBAL
const char *volume_label_option
;
291 /* Other global variables. */
293 /* File descriptor for archive file. */
296 /* Nonzero when outputting to /dev/null. */
297 GLOBAL
bool dev_null_output
;
300 GLOBAL
struct timespec start_time
; /* when we started execution */
301 GLOBAL
struct timespec volume_start_time
; /* when the current volume was
303 GLOBAL
struct timespec last_stat_time
; /* when the statistics was last
306 GLOBAL
struct tar_stat_info current_stat_info
;
308 /* List of tape drive names, number of such tape drives, allocated number,
309 and current cursor in list. */
310 GLOBAL
const char **archive_name_array
;
311 GLOBAL
size_t archive_names
;
312 GLOBAL
size_t allocated_archive_names
;
313 GLOBAL
const char **archive_name_cursor
;
315 /* Output index file name. */
316 GLOBAL
char const *index_file_name
;
318 /* Structure for keeping track of filenames and lists thereof. */
321 struct name
*next
; /* Link to the next element */
322 int change_dir
; /* Number of the directory to change to.
323 Set with the -C option. */
324 uintmax_t found_count
; /* number of times a matching file has
326 int matching_flags
; /* this name is a regexp, not literal */
327 char const *dir_contents
; /* for incremental_option */
329 size_t length
; /* cached strlen(name) */
333 /* Obnoxious test to see if dimwit is trying to dump the archive. */
337 GLOBAL
bool seekable_archive
;
339 GLOBAL dev_t root_device
;
341 /* Unquote filenames */
342 GLOBAL
bool unquote_option
;
344 GLOBAL
bool test_label_option
; /* Test archive volume label and exit */
346 /* Show file or archive names after transformation.
347 In particular, when creating archive in verbose mode, list member names
348 as stored in the archive */
349 GLOBAL
bool show_transformed_names_option
;
351 /* Delay setting modification times and permissions of extracted directories
352 until the end of extraction. This variable helps correctly restore directory
353 timestamps from archives with an unusual member order. It is automatically
354 set for incremental archives. */
355 GLOBAL
bool delay_directory_restore_option
;
357 /* Warn about implicit use of the wildcards in command line arguments.
358 (Default for tar prior to 1.15.91, but changed afterwards */
359 GLOBAL
bool warn_regex_usage
;
361 /* Declarations for each module. */
363 /* FIXME: compare.c should not directly handle the following variable,
364 instead, this should be done in buffer.c only. */
372 extern enum access_mode access_mode
;
374 /* Module buffer.c. */
377 extern bool write_archive_to_stdout
;
378 extern char *volume_label
;
379 extern char *continued_file_name
;
380 extern uintmax_t continued_file_size
;
381 extern uintmax_t continued_file_offset
;
383 size_t available_space_after (union block
*pointer
);
384 off_t
current_block_ordinal (void);
385 void close_archive (void);
386 void closeout_volume_number (void);
387 void compute_duration (void);
388 union block
*find_next_block (void);
389 void flush_read (void);
390 void flush_write (void);
391 void flush_archive (void);
392 void init_volume_number (void);
393 void open_archive (enum access_mode mode
);
394 void print_total_stats (void);
395 void reset_eof (void);
396 void set_next_block_after (union block
*block
);
397 void clear_read_error_count (void);
398 void xclose (int fd
);
399 void archive_write_error (ssize_t status
) __attribute__ ((noreturn
));
400 void archive_read_error (void);
401 off_t
seek_archive (off_t size
);
402 void set_start_time (void);
404 void mv_begin (struct tar_stat_info
*st
);
406 void mv_total_size (off_t size
);
407 void mv_size_left (off_t size
);
410 /* Module create.c. */
417 dump_status_not_implemented
420 void add_exclude_tag (const char *name
);
421 bool file_dumpable_p (struct tar_stat_info
*st
);
422 void create_archive (void);
423 void pad_archive (off_t size_left
);
424 void dump_file (const char *st
, int top_level
, dev_t parent_device
);
425 union block
*start_header (struct tar_stat_info
*st
);
426 void finish_header (struct tar_stat_info
*st
, union block
*header
,
427 off_t block_ordinal
);
428 void simple_finish_header (union block
*header
);
429 union block
* write_extended (bool global
, struct tar_stat_info
*st
,
430 union block
*old_header
);
431 union block
*start_private_header (const char *name
, size_t size
);
432 void write_eot (void);
433 void check_links (void);
435 #define GID_TO_CHARS(val, where) gid_to_chars (val, where, sizeof (where))
436 #define MAJOR_TO_CHARS(val, where) major_to_chars (val, where, sizeof (where))
437 #define MINOR_TO_CHARS(val, where) minor_to_chars (val, where, sizeof (where))
438 #define MODE_TO_CHARS(val, where) mode_to_chars (val, where, sizeof (where))
439 #define OFF_TO_CHARS(val, where) off_to_chars (val, where, sizeof (where))
440 #define SIZE_TO_CHARS(val, where) size_to_chars (val, where, sizeof (where))
441 #define TIME_TO_CHARS(val, where) time_to_chars (val, where, sizeof (where))
442 #define UID_TO_CHARS(val, where) uid_to_chars (val, where, sizeof (where))
443 #define UINTMAX_TO_CHARS(val, where) uintmax_to_chars (val, where, sizeof (where))
444 #define UNAME_TO_CHARS(name,buf) string_to_chars (name, buf, sizeof(buf))
445 #define GNAME_TO_CHARS(name,buf) string_to_chars (name, buf, sizeof(buf))
447 bool gid_to_chars (gid_t gid
, char *buf
, size_t size
);
448 bool major_to_chars (major_t m
, char *buf
, size_t size
);
449 bool minor_to_chars (minor_t m
, char *buf
, size_t size
);
450 bool mode_to_chars (mode_t m
, char *buf
, size_t size
);
451 bool off_to_chars (off_t off
, char *buf
, size_t size
);
452 bool size_to_chars (size_t v
, char *buf
, size_t size
);
453 bool time_to_chars (time_t t
, char *buf
, size_t size
);
454 bool uid_to_chars (uid_t uid
, char *buf
, size_t size
);
455 bool uintmax_to_chars (uintmax_t v
, char *buf
, size_t size
);
456 void string_to_chars (char const *s
, char *buf
, size_t size
);
458 /* Module diffarch.c. */
460 extern bool now_verifying
;
462 void diff_archive (void);
463 void diff_init (void);
464 void verify_volume (void);
466 /* Module extract.c. */
468 void extr_init (void);
469 void extract_archive (void);
470 void extract_finish (void);
471 bool rename_directory (char *src
, char *dst
);
473 /* Module delete.c. */
475 void delete_archive_members (void);
477 /* Module incremen.c. */
479 char *get_directory_contents (char *dir_name
, dev_t device
);
480 const char *append_incremental_renames (const char *dump
);
481 void read_directory_file (void);
482 void write_directory_file (void);
483 void purge_directory (char const *directory_name
);
484 void list_dumpdir (char *buffer
, size_t size
);
485 void update_parent_directory (const char *name
);
487 size_t dumpdir_size (const char *p
);
488 bool is_dumpdir (struct tar_stat_info
*stat_info
);
494 HEADER_STILL_UNREAD
, /* for when read_header has not been called */
495 HEADER_SUCCESS
, /* header successfully read and checksummed */
496 HEADER_SUCCESS_EXTENDED
, /* likewise, but we got an extended header */
497 HEADER_ZERO_BLOCK
, /* zero block where header expected */
498 HEADER_END_OF_FILE
, /* true end of file while header expected */
499 HEADER_FAILURE
/* ill-formed header, or bad checksum */
509 GLOBAL
struct xheader extended_header
;
510 extern union block
*current_header
;
511 extern enum archive_format current_format
;
512 extern size_t recent_long_name_blocks
;
513 extern size_t recent_long_link_blocks
;
515 void decode_header (union block
*header
, struct tar_stat_info
*stat_info
,
516 enum archive_format
*format_pointer
, int do_user_group
);
517 char const *tartime (struct timespec t
, bool full_time
);
519 #define GID_FROM_HEADER(where) gid_from_header (where, sizeof (where))
520 #define MAJOR_FROM_HEADER(where) major_from_header (where, sizeof (where))
521 #define MINOR_FROM_HEADER(where) minor_from_header (where, sizeof (where))
522 #define MODE_FROM_HEADER(where) mode_from_header (where, sizeof (where))
523 #define OFF_FROM_HEADER(where) off_from_header (where, sizeof (where))
524 #define SIZE_FROM_HEADER(where) size_from_header (where, sizeof (where))
525 #define TIME_FROM_HEADER(where) time_from_header (where, sizeof (where))
526 #define UID_FROM_HEADER(where) uid_from_header (where, sizeof (where))
527 #define UINTMAX_FROM_HEADER(where) uintmax_from_header (where, sizeof (where))
529 gid_t
gid_from_header (const char *buf
, size_t size
);
530 major_t
major_from_header (const char *buf
, size_t size
);
531 minor_t
minor_from_header (const char *buf
, size_t size
);
532 mode_t
mode_from_header (const char *buf
, size_t size
);
533 off_t
off_from_header (const char *buf
, size_t size
);
534 size_t size_from_header (const char *buf
, size_t size
);
535 time_t time_from_header (const char *buf
, size_t size
);
536 uid_t
uid_from_header (const char *buf
, size_t size
);
537 uintmax_t uintmax_from_header (const char * buf
, size_t size
);
539 void list_archive (void);
540 void print_for_mkdir (char *dirname
, int length
, mode_t mode
);
541 void print_header (struct tar_stat_info
*st
, off_t block_ordinal
);
542 void read_and (void (*do_something
) (void));
543 enum read_header
read_header_primitive (bool raw_extended_headers
,
544 struct tar_stat_info
*info
);
545 enum read_header
read_header (bool raw_extended_headers
);
546 enum read_header
tar_checksum (union block
*header
, bool silent
);
547 void skip_file (off_t size
);
548 void skip_member (void);
552 void assign_string (char **dest
, const char *src
);
553 char *quote_copy_string (const char *str
);
554 int unquote_string (char *str
);
556 void code_ns_fraction (int ns
, char *p
);
557 char const *code_timespec (struct timespec ts
, char *sbuf
);
558 enum { BILLION
= 1000000000, LOG10_BILLION
= 9 };
559 enum { TIMESPEC_STRSIZE_BOUND
=
560 UINTMAX_STRSIZE_BOUND
+ LOG10_BILLION
+ sizeof "-." - 1 };
564 ORDINARY_REMOVE_OPTION
,
565 RECURSIVE_REMOVE_OPTION
,
567 /* FIXME: The following value is never used. It seems to be intended
568 as a placeholder for a hypothetical option that should instruct tar
569 to recursively remove subdirectories in purge_directory(),
570 as opposed to the functionality of --recursive-unlink
571 (RECURSIVE_REMOVE_OPTION value), which removes them in
572 prepare_to_extract() phase. However, with the addition of more
573 meta-info to the incremental dumps, this should become unnecessary */
574 WANT_DIRECTORY_REMOVE_OPTION
576 int remove_any_file (const char *file_name
, enum remove_option option
);
577 bool maybe_backup_file (const char *file_name
, bool this_is_the_archive
);
578 void undo_last_backup (void);
580 int deref_stat (bool deref
, char const *name
, struct stat
*buf
);
582 void closeopen (void);
583 int chdir_arg (char const *dir
);
584 void chdir_do (int dir
);
586 void close_diag (char const *name
);
587 void open_diag (char const *name
);
588 void read_diag_details (char const *name
, off_t offset
, size_t size
);
589 void readlink_diag (char const *name
);
590 void savedir_diag (char const *name
);
591 void seek_diag_details (char const *name
, off_t offset
);
592 void stat_diag (char const *name
);
593 void write_error_details (char const *name
, size_t status
, size_t size
);
594 void write_fatal (char const *name
) __attribute__ ((noreturn
));
595 void write_fatal_details (char const *name
, ssize_t status
, size_t size
)
596 __attribute__ ((noreturn
));
599 void xpipe (int fd
[2]);
601 void *page_aligned_alloc (void **ptr
, size_t size
);
602 int set_file_atime (int fd
, char const *file
,
603 struct timespec
const timespec
[2]);
605 /* Module names.c. */
607 extern struct name
*gnu_list_name
;
609 void gid_to_gname (gid_t gid
, char **gname
);
610 int gname_to_gid (char const *gname
, gid_t
*pgid
);
611 void uid_to_uname (uid_t uid
, char **uname
);
612 int uname_to_uid (char const *uname
, uid_t
*puid
);
614 void name_init (void);
615 void name_add_name (const char *name
, int matching_flags
);
616 void name_add_dir (const char *name
);
617 void name_term (void);
618 const char *name_next (int change_dirs
);
619 void name_gather (void);
620 struct name
*addname (char const *string
, int change_dir
);
621 bool name_match (const char *name
);
622 void names_notfound (void);
623 void collect_and_sort_names (void);
624 struct name
*name_scan (const char *name
);
625 char *name_from_list (void);
626 void blank_name_list (void);
627 char *new_name (const char *dir_name
, const char *name
);
628 size_t stripped_prefix_len (char const *file_name
, size_t num
);
629 bool all_names_found (struct tar_stat_info
*st
);
631 bool excluded_name (char const *name
);
633 void add_avoided_name (char const *name
);
634 bool is_avoided_name (char const *name
);
635 bool is_individual_file (char const *name
);
637 bool contains_dot_dot (char const *name
);
639 #define ISFOUND(c) ((occurrence_option == 0) ? (c)->found_count : \
640 (c)->found_count == occurrence_option)
641 #define WASFOUND(c) ((occurrence_option == 0) ? (c)->found_count : \
642 (c)->found_count >= occurrence_option)
648 int confirm (const char *message_action
, const char *name
);
649 void request_stdin (const char *option
);
651 void tar_stat_init (struct tar_stat_info
*st
);
652 void tar_stat_destroy (struct tar_stat_info
*st
);
653 void usage (int) __attribute__ ((noreturn
));
654 int tar_timespec_cmp (struct timespec a
, struct timespec b
);
655 const char *archive_format_string (enum archive_format fmt
);
656 const char *subcommand_string (enum subcommand c
);
658 /* Module update.c. */
660 extern char *output_start
;
662 void update_archive (void);
664 /* Module xheader.c. */
666 void xheader_decode (struct tar_stat_info
*stat
);
667 void xheader_decode_global (void);
668 void xheader_store (char const *keyword
, struct tar_stat_info
const *st
,
670 void xheader_read (union block
*header
, size_t size
);
671 void xheader_write (char type
, char *name
, struct xheader
*xhdr
);
672 void xheader_write_global (void);
673 void xheader_finish (struct xheader
*hdr
);
674 void xheader_destroy (struct xheader
*hdr
);
675 char *xheader_xhdr_name (struct tar_stat_info
*st
);
676 char *xheader_ghdr_name (void);
677 void xheader_write (char type
, char *name
, struct xheader
*xhdr
);
678 void xheader_write_global (void);
679 void xheader_set_option (char *string
);
680 void xheader_string_begin (void);
681 void xheader_string_add (char const *s
);
682 bool xheader_string_end (char const *keyword
);
683 bool xheader_keyword_deleted_p (const char *kw
);
684 char *xheader_format_name (struct tar_stat_info
*st
, const char *fmt
,
687 /* Module system.c */
689 void sys_detect_dev_null_output (void);
690 void sys_save_archive_dev_ino (void);
691 void sys_drain_input_pipe (void);
692 void sys_wait_for_child (pid_t
);
693 void sys_spawn_shell (void);
694 bool sys_compare_uid (struct stat
*a
, struct stat
*b
);
695 bool sys_compare_gid (struct stat
*a
, struct stat
*b
);
696 bool sys_file_is_archive (struct tar_stat_info
*p
);
697 bool sys_compare_links (struct stat
*link_data
, struct stat
*stat_data
);
698 int sys_truncate (int fd
);
699 pid_t
sys_child_open_for_compress (void);
700 pid_t
sys_child_open_for_uncompress (void);
701 size_t sys_write_archive_buffer (void);
702 bool sys_get_archive_stat (void);
703 int sys_exec_command (char *file_name
, int typechar
, struct tar_stat_info
*st
);
704 void sys_wait_command (void);
705 int sys_exec_info_script (const char **archive_name
, int volume_number
);
707 /* Module compare.c */
708 void report_difference (struct tar_stat_info
*st
, const char *message
, ...);
710 /* Module sparse.c */
711 bool sparse_member_p (struct tar_stat_info
*st
);
712 bool sparse_fixup_header (struct tar_stat_info
*st
);
713 enum dump_status
sparse_dump_file (int, struct tar_stat_info
*st
);
714 enum dump_status
sparse_extract_file (int fd
, struct tar_stat_info
*st
,
716 enum dump_status
sparse_skip_file (struct tar_stat_info
*st
);
717 bool sparse_diff_file (int, struct tar_stat_info
*st
);
720 bool string_ascii_p (const char *str
);
721 bool utf8_convert (bool to_utf
, char const *input
, char **output
);
723 /* Module transform.c */
724 void set_transform_expr (const char *expr
);
725 bool transform_name (char **pinput
);
726 bool transform_name_fp (char **pinput
, char *(*fun
)(char *));