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freebsd/usr.bin/gzip/zmore
Xin LI 9a9ea25f4a Replace the GNU gzip with a slightly modified NetBSD gzip. The
NetBSD version is a feature-to-feature re-implementation of GNU
gzip using the freely-redistributable zlib and this version is
expected to be mostly bug-to-bug compatible with the GNU
implementation.

 - Because this is a piece of mature code and we want to make
   changes so it is added directly rather than importing to
   src/contrib.
 - Connect newly added code to src/usr.bin/ and rescue/rescue
   build.
 - Disconnect the GNU gzip code from build for now, they will
   be eventually removed completely.
 - Provide two new src.conf(5) knobs, WITHOUT_BZIP2_SUPPORT and
   WITHOUT_BZIP2.

Tested by:	kris (full exp-7 pointyhat build)
Approved by:	core (importing a 4-clause BSD licensed file)
Approved by:	re (adding new utility during -HEAD code slush)
2007-01-26 10:19:08 +00:00

76 lines
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#!/bin/sh -
#
# $NetBSD: zmore,v 1.3 2004/03/29 09:59:42 wiz Exp $
# $OpenBSD: zmore,v 1.4 2003/07/29 07:42:45 otto Exp $
#
#-
# Copyright (c) 2003 Todd C. Miller <Todd.Miller@courtesan.com>
#
# Permission to use, copy, modify, and distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
#
# Sponsored in part by the Defense Advanced Research Projects
# Agency (DARPA) and Air Force Research Laboratory, Air Force
# Materiel Command, USAF, under agreement number F39502-99-1-0512.
#
# $FreeBSD$
# Pull out any command line flags so we can pass them to more/less
flags=
while test $# -ne 0; do
case "$1" in
--)
shift
break
;;
-*)
flags="$flags $1"
shift
;;
*)
break
;;
esac
done
# No files means read from stdin
if [ $# -eq 0 ]; then
gzip -cdfq 2>&1 | ${PAGER-more} $flags
exit 0
fi
oterm=`stty -g 2>/dev/null`
while test $# -ne 0; do
gzip -cdfq "$1" 2>&1 | ${PAGER-more} $flags
prev="$1"
shift
if tty -s && test -n "$oterm" -a $# -gt 0; then
#echo -n "--More--(Next file: $1)"
echo -n "$prev (END) - Next: $1 "
trap "stty $oterm 2>/dev/null" 0 1 2 3 13 15
stty cbreak -echo 2>/dev/null
REPLY=`dd bs=1 count=1 2>/dev/null`
stty $oterm 2>/dev/null
trap - 0 1 2 3 13 15
echo
case "$REPLY" in
s)
shift
;;
e|q)
break
;;
esac
fi
done
exit 0