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.Dd May 31, 2020
.Dt UNZCK 1
.Os
.Sh NAME
.Nm unzck
.Nd decompress a file in the zchunk format
.Sh SYNOPSIS
.Nm
.Op Fl c | Fl -stdout
.Op Fl -dict
.Op Fl v | Fl -verbose
.Ar file
.Nm
.Fl ? | Fl -help
.Nm
.Fl -usage
.Nm
.Fl -version
.Sh DESCRIPTION
The
.Nm
utility extracts the original file from a zchunk-compressed one.
.Pp
.Em NOTE:
The
.Nm
utility will place the new file without the
.Pa .zck
extension in the
.Em current
working directory, not in the directory where the original file resides.
.Pp
The
.Nm
utility accepts the following optional arguments:
.Pp
.Bl -tag -width indent
.It Fl c , Fl -stdout
Extract the data to the standard output stream, do not write it to a file.
.It Fl -dict
Only extract the zstd compression dictionary.
.It Fl v , Fl -verbose
Verbose operation; display some diagnostic output.
.It Fl ? , Fl -help
Display program usage information and exit.
.It Fl -usage
Display brief program usage information and exit.
.It Fl -version
Display program version information and exit.
.El
.Sh EXIT STATUS
.Ex -std
.Sh EXAMPLES
Create (in the current directory) an uncompressed
.Pa words
file from a compressed one:
.Pp
.Dl unzck /mnt/xfer/words.zck
.Pp
Do not create the
.Pa words
file, but send the contents to the standard output stream:
.Pp
.Dl unzck -c /mnt/xfer/words.zck
.Pp
.Sh SEE ALSO
.Xr zck 1 ,
.Xr zck_delta_size 1 ,
.Xr zck_gen_zdict 1 ,
.Xr zck_read_header 1 ,
.Xr zckdl 1
.Sh AUTHOR
The
.Nm
utility was written by
.An Jonathan Dieter Aq jdieter@gmail.com .
This manual page stub was written by
.An Peter Pentchev Aq roam@ringlet.net .