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Diffstat (limited to 'doc')
| -rw-r--r-- | doc/xlunzip.1 | 33 |
1 files changed, 16 insertions, 17 deletions
diff --git a/doc/xlunzip.1 b/doc/xlunzip.1 index ea83510..2f7ccb1 100644 --- a/doc/xlunzip.1 +++ b/doc/xlunzip.1 @@ -1,27 +1,26 @@ .\" DO NOT MODIFY THIS FILE! It was generated by help2man 1.46.1. -.TH XLUNZIP "1" "April 2020" "xlunzip 0.5" "User Commands" +.TH XLUNZIP "1" "June 2020" "xlunzip 0.6" "User Commands" .SH NAME xlunzip \- test tool for the lzip_decompress linux module .SH SYNOPSIS .B xlunzip [\fI\,options\/\fR] [\fI\,files\/\fR] .SH DESCRIPTION -Xlunzip is a test tool for the lzip decompression code of my lzip patch -for linux. Xlunzip is similar to lunzip, but it uses the lzip_decompress -linux module as a backend. Xlunzip tests the module for stream, -buffer\-to\-buffer and mixed decompression modes, including in\-place -decompression (using the same buffer for input and output). You can use -xlunzip to verify that the module produces correct results when -decompressing single member files, multimember files, or the -concatenation of two or more compressed files. Xlunzip can be used with -unzcrash to test the robustness of the module to the decompression of -corrupted data. +Xlunzip is a test tool for the lzip decompression code of my lzip patch for +linux. Xlunzip is similar to lunzip, but it uses the lzip_decompress linux +module as a backend. Xlunzip tests the module for stream, buffer\-to\-buffer, +and mixed decompression modes, including in\-place decompression (using the +same buffer for input and output). You can use xlunzip to verify that the +module produces correct results when decompressing single member files, +multimember files, or the concatenation of two or more compressed files. +Xlunzip can be used with unzcrash to test the robustness of the module to +the decompression of corrupted data. .PP -Note that the in\-place decompression of concatenated files can't be -guaranteed to work because an arbitrarily low compression ratio of the -last part of the data can be achieved by appending enough empty -compressed members to a file, masking a high compression ratio at the -beginning of the data. +The distributed index feature of the lzip format allows xlunzip to +decompress concatenated files in place. This can't be guaranteed to work +with formats like gzip or bzip2 because they can't detect whether a high +compression ratio in the first members of the multimember data is being +masked by a low compression ratio in the last members. .SH OPTIONS .TP \fB\-h\fR, \fB\-\-help\fR @@ -46,7 +45,7 @@ decompress or test using only one buffer keep (don't delete) input files .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 |