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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  --decom-
       press  --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_OPT environment variable.  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.

       -M limit, --memory=limit
              Set  the memory usage limit.  If this option is specified multiple times, the last one takes effect. The
              limit can be specified in multiple ways:

              ?  The limit can be an absolute value in bytes. Using an integer suffix like MiB can be useful. Example:
                 --memory=80MiB

              ?  The limit can be specified as a percentage of physical RAM. Example: --memory=70%

              ?  The limit can be reset back to its default value (currently 40 % of physical RAM) by setting it to 0.

              ?  The memory usage limiting can be effectively disabled by setting limit to  max.   This  isn't  recom-
                 mended. It's usually better to use, for example, --memory=90%.

              The current limit can be seen near the bottom of the output of the --help option.

       -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
       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 operat-
       ing system distributions. If you need a truly small .xz decompressor, consider using XZ Embedded.

SEE ALSO
       xz(1)



Tukaani                           2009-06-04                          XZDEC(1)