Use a script wrapper for <compress>grep

Import the wrapper script from zstdgrep (written by wiz@netbsd.org)

Modify it to support more than just zstd (adding support for gzip,
lzma, xz and bzip2)

Write a simple manpage dedicated for it.

Only use that new wrapper both for gnu grep and bsd grep

Next step will be removing code related to compression format from bsdgrep

Reviewed by:	kevans
Approved by:	kevans
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D15193

1 files changed, 90 insertions, 0 deletions

diff --git a/usr.bin/grep/zgrep.1 b/usr.bin/grep/zgrep.1
new file mode 100644
index 000000000000..05448093bf44
--- /dev/null
+++ b/usr.bin/grep/zgrep.1
@@ -0,0 +1,90 @@
+.\" Copyright (c) 2018 Baptiste Daroussin <bapt@FreeBSD.org>
+.\" All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\" $FreeBSD$
+.\"
+.Dd April 25, 2018
+.Dt ZGREP 1
+.Os
+.Sh NAME
+.Nm zgrep ,
+.Nm zegrep ,
+.Nm zfgrep ,
+.Nm bzgrep ,
+.Nm bzegrep ,
+.Nm bzfgrep ,
+.Nm lzgrep ,
+.Nm lzegrep ,
+.Nm lzfgrep ,
+.Nm xzgrep ,
+.Nm xzegrep ,
+.Nm xzfgrep ,
+.Nm zstdgrep ,
+.Nm zstdegrep ,
+.Nm zstdfgrep
+.Nd
+.Xr grep 1
+compressed files
+.Sh SYNOPSIS
+.Nm
+.Oo Ar flags Oc Ar files
+.Nm zegrep
+.Oo Ar flags Oc Ar files
+.Nm zfgrep
+.Oo Ar flags Oc Ar files
+.Nm bzgrep
+.Oo Ar flags Oc Ar files
+.Nm bzegrep
+.Oo Ar flags Oc Ar files
+.Nm bzfgrep
+.Oo Ar flags Oc Ar files
+.Nm lzgrep
+.Oo Ar flags Oc Ar files
+.Nm lzegrep
+.Oo Ar flags Oc Ar files
+.Nm lzfgrep
+.Oo Ar flags Oc Ar files
+.Nm xzgrep
+.Oo Ar flags Oc Ar files
+.Nm xzegrep
+.Oo Ar flags Oc Ar files
+.Nm xzfgrep
+.Oo Ar flags Oc Ar files
+.Nm zstdgrep
+.Oo Ar flags Oc Ar files
+.Nm zstdegrep
+.Oo Ar flags Oc Ar files
+.Nm zstdfgrep
+.Oo Ar flags Oc Ar files
+.Sh DESCRIPTION
+Allow
+.Xr grep 1
+to read compressed files
+.Sh SEE ALSO
+.Xr grep 1
+.Sh AUTHORS
+This version of the
+.Nm
+utility was written by
+.An Thomas Klausner Aq Mt wiz@NetBSD.org .