Description Zutils is a collection of utilities able to deal with any combination of compressed and non-compressed files transparently. If any given file, including standard input, is compressed, its uncompressed content is used. Compressed files are decompressed on the fly; no temporary files are created. These utilities are not wrapper scripts but safer and more efficient C++ programs. In particular the "--recursive" option is very efficient in those utilities supporting it. The provided utilities are zcat, zcmp, zdiff, zgrep and ztest. The supported formats are bzip2, gzip, lzip and xz. Zcat, zcmp, zdiff, and zgrep are improved replacements for the shell scripts provided with GNU gzip. Ztest is unique to zutils. NOTE: Bzip2 and lzip provide well-defined values of exit status, which makes them safe to use with zutils. Gzip and xz may return ambiguous warning values, making them less reliable backends for zutils. Copyright (C) 2009, 2010, 2011, 2012, 2013 Antonio Diaz Diaz. This file is free documentation: you have unlimited permission to copy, distribute and modify it. The file Makefile.in is a data file used by configure to produce the Makefile. It has the same copyright owner and permissions that configure itself.