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xzdec, lzmadec - Small .xz and .lzma decompressors


xzdec [option]... [file]...
lzmadec [option]... [file]...


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.


-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.


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.


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.

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