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Merging upstream version 1.9.

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Signed-off-by: Daniel Baumann <daniel@debian.org>
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Daniel Baumann 2025-02-24 04:17:44 +01:00
parent c7dcd442c7
commit 48c5ddf50f
Signed by: daniel
GPG key ID: FBB4F0E80A80222F
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doc/plzip.1
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@ -1,5 +1,5 @@
.\" DO NOT MODIFY THIS FILE! It was generated by help2man 1.46.1.
.TH PLZIP "1" "January 2019" "plzip 1.8" "User Commands"
.\" DO NOT MODIFY THIS FILE! It was generated by help2man 1.47.16.
.TH PLZIP "1" "January 2021" "plzip 1.9" "User Commands"
.SH NAME
plzip \- reduces the size of files
.SH SYNOPSIS
@ -7,22 +7,24 @@ plzip \- reduces the size of files
[\fI\,options\/\fR] [\fI\,files\/\fR]
.SH DESCRIPTION
Plzip is a massively parallel (multi\-threaded) implementation of lzip, fully
compatible with lzip 1.4 or newer. Plzip uses the lzlib compression library.
compatible with lzip 1.4 or newer. Plzip uses the compression library lzlib.
.PP
Lzip is a lossless data compressor with a user interface similar to the
one of gzip or bzip2. Lzip can compress about as fast as gzip (lzip \fB\-0\fR)
or compress most files more than bzip2 (lzip \fB\-9\fR). Decompression speed is
intermediate between gzip and bzip2. Lzip is better than gzip and bzip2
from a data recovery perspective. Lzip has been designed, written and
tested with great care to replace gzip and bzip2 as the standard
general\-purpose compressed format for unix\-like systems.
Lzip is a lossless data compressor with a user interface similar to the one
of gzip or bzip2. Lzip uses a simplified form of the 'Lempel\-Ziv\-Markov
chain\-Algorithm' (LZMA) stream format, chosen to maximize safety and
interoperability. Lzip can compress about as fast as gzip (lzip \fB\-0\fR) or
compress most files more than bzip2 (lzip \fB\-9\fR). Decompression speed is
intermediate between gzip and bzip2. Lzip is better than gzip and bzip2 from
a data recovery perspective. Lzip has been designed, written, and tested
with great care to replace gzip and bzip2 as the standard general\-purpose
compressed format for unix\-like systems.
.PP
Plzip can compress/decompress large files on multiprocessor machines
much faster than lzip, at the cost of a slightly reduced compression
ratio (0.4 to 2 percent larger compressed files). Note that the number
of usable threads is limited by file size; on files larger than a few GB
plzip can use hundreds of processors, but on files of only a few MB
plzip is no faster than lzip.
Plzip can compress/decompress large files on multiprocessor machines much
faster than lzip, at the cost of a slightly reduced compression ratio (0.4
to 2 percent larger compressed files). Note that the number of usable
threads is limited by file size; on files larger than a few GB plzip can use
hundreds of processors, but on files of only a few MB plzip is no faster
than lzip.
.SH OPTIONS
.TP
\fB\-h\fR, \fB\-\-help\fR
@ -62,7 +64,7 @@ set match length limit in bytes [36]
set number of (de)compression threads [2]
.TP
\fB\-o\fR, \fB\-\-output=\fR<file>
if reading standard input, write to <file>
write to <file>, keep input files
.TP
\fB\-q\fR, \fB\-\-quiet\fR
suppress all messages
@ -93,6 +95,9 @@ number of 1 MiB input packets buffered [4]
.TP
\fB\-\-out\-slots=\fR<n>
number of 1 MiB output packets buffered [64]
.TP
\fB\-\-check\-lib\fR
compare version of lzlib.h with liblz.{a,so}
.PP
If no file names are given, or if a file is '\-', plzip compresses or
decompresses from standard input to standard output.
@ -103,8 +108,11 @@ to 2^29 bytes.
.PP
The bidimensional parameter space of LZMA can't be mapped to a linear
scale optimal for all files. If your files are large, very repetitive,
etc, you may need to use the \fB\-\-dictionary\-size\fR and \fB\-\-match\-length\fR
options directly to achieve optimal performance.
etc, you may need to use the options \fB\-\-dictionary\-size\fR and \fB\-\-match\-length\fR
directly to achieve optimal performance.
.PP
To extract all the files from archive 'foo.tar.lz', use the commands
\&'tar \fB\-xf\fR foo.tar.lz' or 'plzip \fB\-cd\fR foo.tar.lz | tar \fB\-xf\fR \-'.
.PP
Exit status: 0 for a normal exit, 1 for environmental problems (file
not found, invalid flags, I/O errors, etc), 2 to indicate a corrupt or
@ -117,8 +125,8 @@ Plzip home page: http://www.nongnu.org/lzip/plzip.html
.SH COPYRIGHT
Copyright \(co 2009 Laszlo Ersek.
.br
Copyright \(co 2019 Antonio Diaz Diaz.
Using lzlib 1.11
Copyright \(co 2021 Antonio Diaz Diaz.
Using lzlib 1.12
License GPLv2+: GNU GPL version 2 or later <http://gnu.org/licenses/gpl.html>
.br
This is free software: you are free to change and redistribute it.