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| author | Sergey Poznyakoff <gray@gnu.org.ua> | 2009-09-08 10:27:57 +0300 |
|---|---|---|
| committer | Sergey Poznyakoff <gray@gnu.org.ua> | 2009-09-08 10:27:57 +0300 |
| commit | cef4d5e83830763a1acd5d603fb62a356df27299 (patch) | |
| tree | b54fc346e5d728c40909fa55e924586ce4d55f1a /doc | |
| parent | ba954ea1e1576505f2e0ce3efdbed9025739121d (diff) | |
| download | tar-cef4d5e83830763a1acd5d603fb62a356df27299.tar.gz | |
Automatic detection of seekable archives.
* src/buffer.c (guess_seekable_archive): New function.
(_open_archive): Call guess_seekable_archive for archives
open for reading.
(new_volume): Likewise.
* src/common.h (seek_option): New global.
* src/tar.c (options): New option --no-seek.
(parse_opt): --seek and --no-seek set seek_option,
not seekable_archive.
(decode_options): Initialize seek_option to -1.
* NEWS: Update.
* doc/tar.texi: Update.
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/tar.texi | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/doc/tar.texi b/doc/tar.texi index 7154dfd0..e6093685 100644 --- a/doc/tar.texi +++ b/doc/tar.texi @@ -2950,6 +2950,14 @@ When extracting an archive, subtract the user's umask from files from the permissions specified in the archive. This is the default behavior for ordinary users. +@opsummary{no-seek} +@item --no-seek + +The archive media does not support seeks to arbitrary +locations. Usually @command{tar} determines automatically whether +the archive can be seeked or not. Use this option to disable this +mechanism. + @opsummary{no-unquote} @item --no-unquote Treat all input file or member names literally, do not interpret @@ -3180,7 +3188,9 @@ effect only for ordinary users. @xref{Attributes}. Assume that the archive media supports seeks to arbitrary locations. Usually @command{tar} determines automatically whether the archive can be seeked or not. This option is intended for use -in cases when such recognition fails. +in cases when such recognition fails. It takes effect only if the +archive is open for reading (e.g. with @option{--list} or +@option{--extract} options). @opsummary{show-defaults} @item --show-defaults |