#!/bin/sh
set -e

catdir=/var/cache/man

ensure_catdir () {
    if [ ! -d $catdir ]; then
	# Make sure the cat directory exists.
	install -d -o man -g root -m 02755 $catdir
    fi
}

run_mandb () {
    if [ ! -e /var/lib/man-db/auto-update ]; then
	echo "Not building database; man-db/auto-update is not 'true'." >&2
	return 0
    fi
    local message="$1"
    shift
    [ "$message" ] && echo "$message" >&2
    # start-stop-daemon isn't available when running from debootstrap.
    perl -e '@pwd = getpwnam("man"); $) = $( = $pwd[3]; $> = $< = $pwd[2];
	     exec "/usr/bin/mandb", @ARGV' -- "$@" || true
}

if [ "$1" = triggered ]; then
    ensure_catdir
    # We don't print a status message here, as dpkg already said
    # "Processing triggers for man-db ...".
    run_mandb "" -pq
    exit 0
fi

. /usr/share/debconf/confmodule
db_version 2.0

[ "$1" = configure ] || exit 0

maybesetuid='man mandb'

db_get man-db/install-setuid

if [ "$RET" = true ]; then
    # man and mandb are to be installed setuid man.
    owner=man:root
    mode=4755
else
    # man and mandb are not to be installed setuid.
    owner=root:root
    mode=0755
fi

for x in $maybesetuid; do
    # No statoverrides available or none exist for us ...
    if ! dpkg-statoverride --list /usr/bin/$x >/dev/null; then
	chown $owner /usr/bin/$x || true
	chmod $mode  /usr/bin/$x
    fi
done

if [ -e /etc/cron.daily/man.moved-by-preinst ]; then
    rm /etc/cron.daily/man.moved-by-preinst
fi
if [ -e /etc/cron.weekly/catman.moved-by-preinst ]; then
    rm /etc/cron.weekly/catman.moved-by-preinst
fi

ensure_catdir

# debconf forms the interface used to suppress man-db updates during
# automatic package builds (see https://bugs.debian.org/554914), but we
# cache that value in the file system to avoid having to use debconf when
# processing triggers.
db_get man-db/auto-update
if [ "$RET" = true ]; then
    touch /var/lib/man-db/auto-update
else
    rm -f /var/lib/man-db/auto-update
fi

build_db=0

if [ ! -f $catdir/index.db ]; then
    # Build the database from scratch on fresh installs.
    build_db=1
elif dpkg --compare-versions "$2" lt 2.7.0; then
    # At 2.7.0, the database version number changed to 2.7.0.
    build_db=1
fi

if [ $build_db -eq 1 ]; then
    # Chances are we're being run from debootstrap, which will have problems
    # if mandb runs backgrounded for too long (bug #100616).
    run_mandb "Building database of manual pages ..." -cq
else
    # Otherwise, just update the database in the foreground. It's unlikely
    # to take very long, and configuration needs to cover everything that
    # happens when we're triggered.
    run_mandb "Updating database of manual pages ..." -pq
fi



exit 0