Updated
This commit is contained in:
50
doc/tar.texi
50
doc/tar.texi
@@ -3934,13 +3934,10 @@ is the @samp{--update} operation; you can use this to add newer
|
|||||||
versions of archive members to an existing archive. To learn how to
|
versions of archive members to an existing archive. To learn how to
|
||||||
do this with @samp{--update}, @pxref{update}.)
|
do this with @samp{--update}, @pxref{update}.)
|
||||||
|
|
||||||
@FIXME{Explain in second paragraph whether you can get to the previous
|
|
||||||
version -- explain whole situation somewhat more clearly.}
|
|
||||||
|
|
||||||
If you use @value{op-append} to add a file that has the same name as an
|
If you use @value{op-append} to add a file that has the same name as an
|
||||||
archive member to an archive containing that archive member, then the
|
archive member to an archive containing that archive member, then the
|
||||||
old member is not deleted. What does happen, however, is somewhat
|
old member is not deleted. What does happen, however, is somewhat
|
||||||
complex. @command{tar} @emph{allows} you to have infinite numbers of files
|
complex. @command{tar} @emph{allows} you to have infinite number of files
|
||||||
with the same name. Some operations treat these same-named members no
|
with the same name. Some operations treat these same-named members no
|
||||||
differently than any other set of archive members: for example, if you
|
differently than any other set of archive members: for example, if you
|
||||||
view an archive with @value{op-list}, you will see all of those members
|
view an archive with @value{op-list}, you will see all of those members
|
||||||
@@ -3954,14 +3951,33 @@ other members would end up in the working directory. This is because
|
|||||||
in the archive; the most recently archived members will be extracted
|
in the archive; the most recently archived members will be extracted
|
||||||
last. Additionally, an extracted member will @emph{replace} a file of
|
last. Additionally, an extracted member will @emph{replace} a file of
|
||||||
the same name which existed in the directory already, and @command{tar}
|
the same name which existed in the directory already, and @command{tar}
|
||||||
will not prompt you about this. Thus, only the most recently archived
|
will not prompt you about this@footnote{Unless you give it
|
||||||
|
@option{--keep-old-files} option, or the disk copy is newer than the
|
||||||
|
the one in the archive and you invoke @command{tar} with
|
||||||
|
@option{--keep-newer-files} option}. Thus, only the most recently archived
|
||||||
member will end up being extracted, as it will replace the one
|
member will end up being extracted, as it will replace the one
|
||||||
extracted before it, and so on.
|
extracted before it, and so on.
|
||||||
|
|
||||||
@FIXME{ hag -- you might want to incorporate some of the above into the
|
There exists a special option that allows you to get around this
|
||||||
MMwtSN node; not sure. i didn't know how to make it simpler...}
|
behavior and extract (or list) only a particular copy of the file.
|
||||||
|
This is @option{--occurrence} option. If you run @command{tar} with
|
||||||
|
this option, it will extract only the first copy of the file. You
|
||||||
|
may also give this option an argument specifying the number of
|
||||||
|
copy to be extracted. Thus, for example if the archive
|
||||||
|
@file{archive.tar} contained three copies of file @file{myfile}, then
|
||||||
|
the command
|
||||||
|
|
||||||
There are a few ways to get around this. @FIXME-xref{Multiple Members
|
@smallexample
|
||||||
|
tar --extract --file archive.tar --occurrence=2 myfile
|
||||||
|
@end smallexample
|
||||||
|
|
||||||
|
@noindent
|
||||||
|
would extract only the second copy. @xref{Option Summary,---occurrence}, for the description of @value{op-occurrence} option.
|
||||||
|
|
||||||
|
@FIXME{ hag -- you might want to incorporate some of the above into the
|
||||||
|
MMwtSN node; not sure. i didn't know how to make it simpler...
|
||||||
|
|
||||||
|
There are a few ways to get around this. (maybe xref Multiple Members
|
||||||
with the Same Name.}
|
with the Same Name.}
|
||||||
|
|
||||||
@cindex Members, replacing with other members
|
@cindex Members, replacing with other members
|
||||||
@@ -4085,10 +4101,20 @@ The newest version of @file{blues} is now at the end of the archive
|
|||||||
(note the different creation dates and file sizes). If you extract
|
(note the different creation dates and file sizes). If you extract
|
||||||
the archive, the older version of the file @file{blues} will be
|
the archive, the older version of the file @file{blues} will be
|
||||||
replaced by the newer version. You can confirm this by extracting
|
replaced by the newer version. You can confirm this by extracting
|
||||||
the archive and running @samp{ls} on the directory. @xref{Writing},
|
the archive and running @samp{ls} on the directory.
|
||||||
for more information. (@emph{Please note:} This is the case unless
|
|
||||||
you employ the @value{op-backup} option. @FIXME-ref{Multiple Members
|
If you wish to extract the first occurrence of the file @file{blues}
|
||||||
with the Same Name}.)
|
from the archive, use @value{op-occurrence} option, as shown in
|
||||||
|
the following example:
|
||||||
|
|
||||||
|
@smallexample
|
||||||
|
$ @kbd{tar --extract -vv --occurrence --file=collection.tar blues}
|
||||||
|
-rw-rw-rw- me user 21 1996-09-23 16:44 blues
|
||||||
|
@end smallexample
|
||||||
|
|
||||||
|
@xref{Writing}, for more information on @value{op-extract} and
|
||||||
|
@xref{Option Summary, --occurrence}, for the description of
|
||||||
|
@value{op-occurrence} option.
|
||||||
|
|
||||||
@node update
|
@node update
|
||||||
@subsection Updating an Archive
|
@subsection Updating an Archive
|
||||||
|
|||||||
Reference in New Issue
Block a user