xref: /freebsd/usr.bin/gzip/zmore (revision 396c556d77189a5c474d35cec6f44a762e310b7d)
1#!/bin/sh -
2#
3# $NetBSD: zmore,v 1.5 2013/12/06 13:33:15 pettai Exp $
4#
5# $OpenBSD: zmore,v 1.6 2008/08/20 09:22:02 mpf Exp $
6#
7#-
8# Copyright (c) 2003 Todd C. Miller <Todd.Miller@courtesan.com>
9#
10# Permission to use, copy, modify, and distribute this software for any
11# purpose with or without fee is hereby granted, provided that the above
12# copyright notice and this permission notice appear in all copies.
13#
14# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
15# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
16# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
17# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
18# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
19# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
20# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
21#
22# Sponsored in part by the Defense Advanced Research Projects
23# Agency (DARPA) and Air Force Research Laboratory, Air Force
24# Materiel Command, USAF, under agreement number F39502-99-1-0512.
25#
26# $FreeBSD$
27
28# Pull out any command line flags so we can pass them to more/less
29flags=
30while test $# -ne 0; do
31	case "$1" in
32		--)
33			shift
34			break
35			;;
36		-*)
37			flags="$flags $1"
38			shift
39			;;
40		*)
41			break
42			;;
43	esac
44done
45
46if [ `basename $0` = "zless" ] ; then
47	pager=${PAGER-less}
48else
49	pager=${PAGER-more}
50fi
51
52# No files means read from stdin
53if [ $# -eq 0 ]; then
54	gzip -cdfq 2>&1 | $pager $flags
55	exit 0
56fi
57
58oterm=`stty -g 2>/dev/null`
59while test $# -ne 0; do
60	gzip -cdfq "$1" 2>&1 | $pager $flags
61	prev="$1"
62	shift
63	if tty -s && test -n "$oterm" -a $# -gt 0; then
64		#echo -n "--More--(Next file: $1)"
65		echo -n "$prev (END) - Next: $1 "
66		trap "stty $oterm 2>/dev/null" 0 1 2 3 13 15
67		stty cbreak -echo 2>/dev/null
68		REPLY=`dd bs=1 count=1 2>/dev/null`
69		stty $oterm 2>/dev/null
70		trap - 0 1 2 3 13 15
71		echo
72		case "$REPLY" in
73			s)
74				shift
75				;;
76			e|q)
77				break
78				;;
79		esac
80	fi
81done
82exit 0
83