diff options
Diffstat (limited to 'doc/pdlzip.1')
| -rw-r--r-- | doc/pdlzip.1 | 36 |
1 files changed, 22 insertions, 14 deletions
diff --git a/doc/pdlzip.1 b/doc/pdlzip.1 index e160d37..8586d88 100644 --- a/doc/pdlzip.1 +++ b/doc/pdlzip.1 @@ -1,5 +1,5 @@ -.\" DO NOT MODIFY THIS FILE! It was generated by help2man 1.46.1. -.TH PDLZIP "1" "January 2019" "pdlzip 1.10" "User Commands" +.\" DO NOT MODIFY THIS FILE! It was generated by help2man 1.47.16. +.TH PDLZIP "1" "January 2021" "pdlzip 1.11" "User Commands" .SH NAME pdlzip \- reduces the size of files .SH SYNOPSIS @@ -12,13 +12,15 @@ licensed Free Software. (The name of pdlzip comes from 'public domain lzip'). Pdlzip is written in C and is (hope)fully compatible with lzip 1.4 or newer. .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 Pdlzip is also able to decompress legacy lzma\-alone (.lzma) files. Lzma\-alone is a very bad format; it is essentially a raw LZMA stream. @@ -55,7 +57,7 @@ keep (don't delete) input files set match length limit in bytes [36] .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 @@ -90,20 +92,26 @@ to 2^27 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. For example, \fB\-9m64\fR -usually compresses executables more (and faster) than \fB\-9\fR. +etc, you may need to use the options \fB\-\-dictionary\-size\fR and \fB\-\-match\-length\fR +directly to achieve optimal performance. For example, \fB\-9m64\fR usually +compresses executables more (and faster) than \fB\-9\fR. +.PP +To extract all the files from archive 'foo.tar.lz', use the commands +\&'tar \fB\-xf\fR foo.tar.lz' or 'pdlzip \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 invalid input file, 3 for an internal consistency error (eg, bug) which caused pdlzip to panic. +.PP +Pdlzip includes public domain compression/decompression code from the LZMA +SDK (Software Development Kit) written by Igor Pavlov. .SH "REPORTING BUGS" Report bugs to lzip\-bug@nongnu.org .br Pdlzip home page: http://www.nongnu.org/lzip/pdlzip.html .SH COPYRIGHT -Copyright \(co 2019 Antonio Diaz Diaz. +Copyright \(co 2021 Antonio Diaz Diaz. Public Domain 2009 Igor Pavlov. License 2\-clause BSD. .br |