pristine-bz2 - regenerate pristine bz2 files
pristine-bz2 [OPTIONS] gendelta
file.bz2 delta
pristine-bz2 [OPTIONS] genbz2
delta file
This is a complement to the
pristine-tar(1) command. Normally you don't
need to run it by hand, since pristine-tar calls it as necessary to handle
.tar.bz2 files.
pristine-bz2 gendelta takes the specified
bz2 file, and generates a small
binary
delta file that can later be used by pristine-bz2 genbz2 to
recreate the original file.
pristine-bz2 genbz2 takes the specified
delta file, and compresses the
specified input
file (which must be identical to the contents of the
original bz2 file). The resulting file will be identical to the original gz
file used to create the delta.
The approach used to regenerate the original bz2 file is to figure out how it
was produced -- what compression level was used, whether it was built with
bzip2(1) or with
pbzip2(1).
Note that other tools exist, like bzip2smp or dbzip2, but they are said to be
bit-identical with bzip2. Anyway, bzip2 looks like the most widespread
implementation, so it's hard to find bzip2 files that make pristine-bz2 fail.
Please report!
The deprecated bzip1 compression method hasn't been implemented.
If the delta filename is "-", pristine-bz2 reads or writes it to
stdio.
- -v
- Verbose mode, show each command that is run.
- -d
- Debug mode.
- -k
- Don't clean up the temporary directory on exit.
- -t
- Try harder to determine how to generate deltas of difficult
bz2 files.
- TMPDIR
- Specifies a location to place temporary files, other than
the default.
Joey Hess <
[email protected]>, Faidon Liambotis
<
[email protected]>, Cyril Brulebois
<
[email protected]>
Licensed under the GPL, version 2.