hungrycat: cat & rm in a single tool
====================================

*hungrycat* is a tool that prints contents of a file on the standard output,
while simultaneously freeing disk space occupied by the file.

It can be useful if you need to process a large file, but:
 - you don't have enough space to store the output file and
 - you wouldn't need the input file afterwards.

Example::

   $ md5sum bigfile
   d9b18676a36c919c1688cba61a2cf0f1  bigfile

   $ ls -lh bigfile
   -rw------- 1 jwilk users 281M Sep 13 19:46 bigfile

   $ df -h .
   Filesystem            Size  Used Avail Use% Mounted on
   /dev/ice9             330M  284M   29M  91% /mnt/ice9

   $ hungrycat bigfile | bzip2 > bigfile.bz2

   $ ls -lh bigfile*
   -rw------- 1 jwilk users 60M Sep 13 19:49 bigfile.bz2

   $ df -h .
   Filesystem            Size  Used Avail Use% Mounted on
   /dev/ice9             330M   63M  251M  20% /mnt/ice9

   $ bzcat bigfile.bz2 | md5sum
   d9b18676a36c919c1688cba61a2cf0f1  -


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