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#!/bin/sh -e

###############################################################################
# This is the Ubuntu manpage repository generator and interface.
# 
# Copyright (C) 2008 Canonical Ltd.
# 
# This code was originally written by Dustin Kirkland <kirkland@ubuntu.com>,
# based on a framework by Kees Cook <kees@ubuntu.com>.
# 
# 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, see <http://www.gnu.org/licenses/>.
# 
# On Debian-based systems, the complete text of the GNU General Public
# License can be found in /usr/share/common-licenses/GPL-3
###############################################################################


if [ -r /etc/lsb-release ] ; then
    . /etc/lsb-release
else
    DISTRIB_CODENAME=$(lsb_release -c -s 2>/dev/null)
fi
# default to stable if LSB fails or is absent
DISTRIB_CODENAME=${DISTRIB_CODENAME:-stable}
while true; do
	case "$1" in
		--release)
			DISTRIB_CODENAME="$2"
			shift 2
			;;
		*)
			break
			;;
	esac
done
PAGE=`echo "$@" | awk '{print $NF}'`
MAN_ARGS=`echo "$@" | sed "s/\$PAGE$//"`

# Mirror support of man's languages
if [ ! -z "$LANG" ]; then
	LOCALE=$(echo $LANG | sed 's/_.*$//')
	LOCDOT=".$LOCALE"
fi
if [ ! -z "$LC_MESSAGES" ]; then
	LOCALE="$LC_MESSAGES"
	LOCDOT=".$LOCALE"
fi
if echo $LOCALE | grep -E -q "^(C|en)"; then
	LOCALE=""
	LOCDOT=".en"
fi

BASE_URL="https://dyn.manpages.debian.org"

mandir=`mktemp --tmpdir="${TMPDIR:-/tmp}" -d dman.XXXXXX`
trap "rm -rf $mandir" EXIT HUP INT QUIT TERM
man="$mandir/$PAGE"
if wget -O "$man" "$BASE_URL/$DISTRIB_CODENAME/$PAGE$LOCDOT.gz" 2>/dev/null; then
	man $MAN_ARGS -l "$man" || true
    exit 0
else
    echo "$0: not found: $URL" 1>&1
    exit 1
fi