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File: [local] / src / usr.bin / compress / zmore (download)

Revision 1.6, Wed Aug 20 09:22:02 2008 UTC (15 years, 9 months ago) by mpf
Branch: MAIN
CVS Tags: OPENBSD_5_5_BASE, OPENBSD_5_5, OPENBSD_5_4_BASE, OPENBSD_5_4, OPENBSD_5_3_BASE, OPENBSD_5_3, OPENBSD_5_2_BASE, OPENBSD_5_2, OPENBSD_5_1_BASE, OPENBSD_5_1, OPENBSD_5_0_BASE, OPENBSD_5_0, OPENBSD_4_9_BASE, OPENBSD_4_9, OPENBSD_4_8_BASE, OPENBSD_4_8, OPENBSD_4_7_BASE, OPENBSD_4_7, OPENBSD_4_6_BASE, OPENBSD_4_6, OPENBSD_4_5_BASE, OPENBSD_4_5
Changes since 1.5: +3 -3 lines

Use and report errors that inflate(3) can return, instead of
aborting silently, and pretending everything went alright.
This lets gzip(1) (especially gzip -t) detect truncated archives
and curruptions that violate the structure of the zlib format.
Unquiet compress(1) in zless/zmore, so the user has a chance
to see errors on corrupted archives.
OK millert@, markus@

#!/bin/sh -
#
# $OpenBSD: zmore,v 1.6 2008/08/20 09:22:02 mpf 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.
#

# 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

if [ `basename $0` == "zless" ] ; then
	pager=${PAGER-less}
else
	pager=${PAGER-more}
fi

# No files means read from stdin
if [ $# -eq 0 ]; then
	compress -cdf 2>&1 | $pager $flags
	exit 0
fi

oterm=`stty -g 2>/dev/null`
while test $# -ne 0; do
	compress -cdf "$1" 2>&1 | $pager $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