.\" DO NOT MODIFY THIS FILE!  It was generated by help2man 1.49.2.
.TH LZIPRECOVER "1" "January 2024" "lziprecover 1.24" "User Commands"
.SH NAME
lziprecover \- recovers data from damaged lzip files
.SH SYNOPSIS
.B lziprecover
[\fI\,options\/\fR] [\fI\,files\/\fR]
.SH DESCRIPTION
Lziprecover is a data recovery tool and decompressor for files in the lzip
compressed data format (.lz). Lziprecover is able to repair slightly damaged
files (up to one single\-byte error per member), produce a correct file by
merging the good parts of two or more damaged copies, reproduce a missing
(zeroed) sector using a reference file, extract data from damaged files,
decompress files, and test integrity of files.
.PP
With the help of lziprecover, losing an entire archive just because of a
corrupt byte near the beginning is a thing of the past.
.PP
Lziprecover can remove the damaged members from multimember files, for
example multimember tar.lz archives.
.PP
Lziprecover provides random access to the data in multimember files; it only
decompresses the members containing the desired data.
.PP
Lziprecover facilitates the management of metadata stored as trailing data
in lzip files.
.PP
Lziprecover is not a replacement for regular backups, but a last line of
defense for the case where the backups are also damaged.
.SH OPTIONS
.TP
\fB\-h\fR, \fB\-\-help\fR
display this help and exit
.TP
\fB\-V\fR, \fB\-\-version\fR
output version information and exit
.TP
\fB\-a\fR, \fB\-\-trailing\-error\fR
exit with error status if trailing data
.TP
\fB\-A\fR, \fB\-\-alone\-to\-lz\fR
convert lzma\-alone files to lzip format
.TP
\fB\-c\fR, \fB\-\-stdout\fR
write to standard output, keep input files
.TP
\fB\-d\fR, \fB\-\-decompress\fR
decompress, test compressed file integrity
.TP
\fB\-D\fR, \fB\-\-range\-decompress=\fR<n\-m>
decompress a range of bytes to stdout
.TP
\fB\-e\fR, \fB\-\-reproduce\fR
try to reproduce a zeroed sector in file
.TP
\fB\-\-lzip\-level\fR=\fI\,N\/\fR|a|m[N]
reproduce one level, all, or match length
.TP
\fB\-\-lzip\-name=\fR<name>
name of lzip executable for \fB\-\-reproduce\fR
.TP
\fB\-\-reference\-file=\fR<file>
reference file for \fB\-\-reproduce\fR
.TP
\fB\-f\fR, \fB\-\-force\fR
overwrite existing output files
.TP
\fB\-i\fR, \fB\-\-ignore\-errors\fR
ignore some errors in \fB\-d\fR, \fB\-D\fR, \fB\-l\fR, \fB\-t\fR, \fB\-\-dump\fR
.TP
\fB\-k\fR, \fB\-\-keep\fR
keep (don't delete) input files
.TP
\fB\-l\fR, \fB\-\-list\fR
print (un)compressed file sizes
.TP
\fB\-m\fR, \fB\-\-merge\fR
repair errors in file using several copies
.TP
\fB\-o\fR, \fB\-\-output=\fR<file>
place the output into <file>
.TP
\fB\-q\fR, \fB\-\-quiet\fR
suppress all messages
.TP
\fB\-R\fR, \fB\-\-byte\-repair\fR
try to repair a corrupt byte in file
.TP
\fB\-s\fR, \fB\-\-split\fR
split multimember file in single\-member files
.TP
\fB\-t\fR, \fB\-\-test\fR
test compressed file integrity
.TP
\fB\-v\fR, \fB\-\-verbose\fR
be verbose (a 2nd \fB\-v\fR gives more)
.TP
\fB\-\-dump=\fR<list>:d:e:t
dump members, damaged/empty, tdata to stdout
.TP
\fB\-\-remove=\fR<list>:d:e:t
remove members, tdata from files in place
.TP
\fB\-\-strip=\fR<list>:d:e:t
copy files to stdout stripping members given
.TP
\fB\-\-empty\-error\fR
exit with error status if empty member in file
.TP
\fB\-\-marking\-error\fR
exit with error status if 1st LZMA byte not 0
.TP
\fB\-\-loose\-trailing\fR
allow trailing data seeming corrupt header
.TP
\fB\-\-clear\-marking\fR
reset the first LZMA byte of each member
.PP
If no file names are given, or if a file is '\-', lziprecover decompresses
from standard input to standard output.
Numbers may be followed by a multiplier: k = kB = 10^3 = 1000,
Ki = KiB = 2^10 = 1024, M = 10^6, Mi = 2^20, G = 10^9, Gi = 2^30, etc...
.PP
To extract all the files from archive 'foo.tar.lz', use the commands
\&'tar \fB\-xf\fR foo.tar.lz' or 'lziprecover \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 command\-line options, I/O errors, etc), 2 to
indicate a corrupt or invalid input file, 3 for an internal consistency
error (e.g., bug) which caused lziprecover to panic.
.SH "REPORTING BUGS"
Report bugs to lzip\-bug@nongnu.org
.br
Lziprecover home page: http://www.nongnu.org/lzip/lziprecover.html
.SH COPYRIGHT
Copyright \(co 2024 Antonio Diaz Diaz.
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.
There is NO WARRANTY, to the extent permitted by law.
.SH "SEE ALSO"
The full documentation for
.B lziprecover
is maintained as a Texinfo manual.  If the
.B info
and
.B lziprecover
programs are properly installed at your site, the command
.IP
.B info lziprecover
.PP
should give you access to the complete manual.