xzgrep --version (return code: 0)
xzgrep (XZ Utils) 5.1.0alpha
xzgrep --help (return code: 0)
Usage: xzgrep [OPTION]... [-e] PATTERN [FILE]...
Look for instances of PATTERN in the input FILEs, using their
uncompressed contents if they are compressed.
OPTIONs are the same as for 'grep'.
Report bugs to <lasse.collin@tukaani.org>.