/bin/zless is in gzip 1.6-5ubuntu1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 | #!/bin/sh
# Copyright (C) 1998, 2002, 2006, 2007 Free Software Foundation
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
bindir='/bin'
case $1 in
--__bindir) bindir=${2?}; shift; shift;;
esac
PATH=$bindir:$PATH; export PATH
version="zless (gzip) 1.6
Copyright (C) 2007, 2011-2013 Free Software Foundation, Inc.
This is free software. You may redistribute copies of it under the terms of
the GNU General Public License <http://www.gnu.org/licenses/gpl.html>.
There is NO WARRANTY, to the extent permitted by law.
Written by Paul Eggert."
usage="Usage: $0 [OPTION]... [FILE]...
Like 'less', but operate on the uncompressed contents of any compressed FILEs.
Options are the same as for 'less'.
Report bugs to <bug-gzip@gnu.org>."
case $1 in
--help) exec echo "$usage";;
--version) exec echo "$version";;
esac
if test "${LESSMETACHARS+set}" != set; then
# Work around a bug in less 394 and earlier;
# it mishandles the metacharacters '$%=~'.
space=' '
tab=' '
newline='
'
LESSMETACHARS="$space$tab$newline'"';*?"()<>[|&^`#\$%=~'
export LESSMETACHARS
fi
less_version=`less -V` || exit
case $less_version in
'less 429
'* | 'less '4[3-9][0-9]* | 'less '[5-9][0-9][0-9]* | 'less '[1-9][0-9][0-9][0-9]*)
use_input_pipe_on_stdin='-';;
*) use_input_pipe_on_stdin='';;
esac
LESSOPEN="|${use_input_pipe_on_stdin}gzip -cdfq -- %s"
export LESSOPEN
exec less "$@"
|