XZDEC(1) XZ Utils XZDEC(1)
NAME
xzdec, lzmadec - Small .xz and .lzma decompressors
SYNOPSIS
xzdec [
option...] [
file...]
lzmadec [
option...] [
file...]
DESCRIPTION
xzdec is a liblzma-based decompression-only tool for
.xz (and only
.xz) files.
xzdec is intended to work as a drop-in replacement for
xz(1) in the most common situations where a script has been written
to use
xz --decompress --stdout (and possibly a few other commonly
used options) to decompress
.xz files.
lzmadec is identical to
xzdec except that
lzmadec supports
.lzma files instead of
.xz files.
To reduce the size of the executable,
xzdec doesn't support
multithreading or localization, and doesn't read options from
XZ_DEFAULTS and
XZ_OPT environment variables.
xzdec doesn't support
displaying intermediate progress information: sending
SIGINFO to
xzdec does nothing, but sending
SIGUSR1 terminates the process
instead of displaying progress information.
OPTIONS
-d,
--decompress,
--uncompress Ignored for
xz(1) compatibility.
xzdec supports only
decompression.
-k,
--keep Ignored for
xz(1) compatibility.
xzdec never creates or
removes any files.
-c,
--stdout,
--to-stdout Ignored for
xz(1) compatibility.
xzdec always writes the
decompressed data to standard output.
-q,
--quiet Specifying this once does nothing since
xzdec never displays
any warnings or notices. Specify this twice to suppress
errors.
-Q,
--no-warn Ignored for
xz(1) compatibility.
xzdec never uses the exit
status 2.
-h,
--help Display a help message and exit successfully.
-V,
--version Display the version number of
xzdec and liblzma.
EXIT STATUS
0 All was good.
1 An error occurred.
xzdec doesn't have any warning messages like
xz(1) has, thus the exit
status 2 is not used by
xzdec.
NOTES
Use
xz(1) instead of
xzdec or
lzmadec for normal everyday use.
xzdec or
lzmadec are meant only for situations where it is important to
have a smaller decompressor than the full-featured
xz(1).
xzdec and
lzmadec are not really that small. The size can be reduced
further by dropping features from liblzma at compile time, but that
shouldn't usually be done for executables distributed in typical non-
embedded operating system distributions. If you need a truly small
.xz decompressor, consider using XZ Embedded.
SEE ALSO
xz(1) XZ Embedded: <https://tukaani.org/xz/embedded.html>
Tukaani 2017-04-19 XZDEC(1)
