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Provide a way to explicitly set mtime for extended header ustar blocks.

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* src/tar.c (struct textual_date): ts is a copy of the structure,
not a pointer to it. Date is a copy as well, hence the `const' is
taken away.
(get_date_or_file): Return 0/1 depending on success/failure.
Copy timestamp to the `ts' member. Store a copy of the string
in `date'.
(report_textual_dates): Report only if verbose_option is set,
but always free the list.
(expand_pax_option): New function.
(parse_opt): Preprocess the argument to xheader_set_option with
expand_pax_option.
(decode_options): Call report_textual_dates unconditionally.
* src/xheader.c (exthdr_mtime_option, exthdr_mtime)
(globexthdr_mtime_option, globexthdr_mtime): New statics.
(xheader_set_keyword_equal): handle exthdr.mtime and globexthdr.mtime.
(xheader_write): Override `t' argument if a corresponding
exthdr.mtime or globexthdr.mtime option is set.
* NEWS: Update
* doc/tar.texi: Document the changes.
This commit is contained in:
Sergey Poznyakoff
2009-10-07 21:08:29 +03:00
parent 7cb84c25ee
commit 63e092548a
4 changed files with 189 additions and 17 deletions
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34
NEWS
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@@ -1,4 +1,4 @@
GNU tar NEWS - User visible changes. 2009-09-08
GNU tar NEWS - User visible changes. 2009-10-07
Please send GNU tar bug reports to <bug-tar@gnu.org>
@@ -53,11 +53,43 @@ and sets the exit code to 1, which means "some files differ".
If the --warning=no-file-removed option is given, no warning
is issued and the exit code remains 0.
* Modification times of PAX extended headers.
Modification times in the ustar header blocks for the
extended headers are set to the mtimes of the corresponding archive
members. This can be overridden by the
--pax-opion='exthdr.mtime=STRING'
command line option. The STRING is either the number of seconds since
the Epoch or a `Time reference' (see below).
Modification times in the ustar header blocks for the global
extended headers are set to the time when tar was invoked.
This can be overridden by the
--pax-opion='globexthdr.mtime=STRING'
command line option. The STRING is either the number of seconds since
the Epoch or a `Time reference' (see below).
* Time references in --pax-option argument.
Any value from the --pax-option argument that is enclosed in a pair
of curly braces. In that case, the string between the braces is
understood either as a textual time representation, as described in
chapter 7, "Date input formats", of the Tar manual, or as a name of
the existing file, starting with `/' or `.'. In the latter
case, the value is replaced with the modification time of that file.
* Bugfixes
** Fix handling of hard link targets by -c --transform.
** Fix hard links recognition with -c --remove-files.
** Fix restoring files from backup (debian bug #508199).
** Correctly restore modes and permissions on existing directories.
** The --remove-files option removes the files only if they were
succesfully stored in the archive.
version 1.22 - Sergey Poznyakoff, 2009-03-05