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#!/bin/sh

set -eu

CONFFILE=${1:-/etc/knot/knot.conf}

if [ ! -r $CONFFILE ]; then
   echo "$CONFFILE doesn't exist or has wrong permissions."
   exit 1;
fi

KNOT_RUNDIR=$(sed -ne "s/#.*$//;s/.*rundir: \"*\([^\";]*\\).*/\\1/p;" $CONFFILE)
[ -z "$KNOT_RUNDIR" ] && KNOT_RUNDIR=/run/knot

mkdir --parents "$KNOT_RUNDIR";

KNOT_USER=$(sed -ne "s/#.*$//;s/.*user:[ \"]*\\([^\\:\"]*\\)[ \"]*/\\1/p;" $CONFFILE)

if [ -n "$KNOT_USER" ]; then
    if ! getent passwd $KNOT_USER >/dev/null; then
	echo "Configured user '$KNOT_USER' doesn't exist."
	exit 1
    fi

    KNOT_GROUP=$(sed -ne "s/#.*$//;s/.*user:[ \"]*[^\\:\"]*\\:\\([^\"]*\\)[ \"]*/\\1/p;" $CONFFILE)
    if [ -z "$KNOT_GROUP" ]; then
	KNOT_GROUP=$(getent group $(getent passwd "$KNOT_USER" | cut -f 4 -d :) | cut -f 1 -d :)
    fi

    if ! getent group $KNOT_GROUP >/dev/null; then
	echo "Configured group '$KNOT_GROUP' doesn't exist."
	exit 1
    fi
    chown --silent "$KNOT_USER:$KNOT_GROUP" "$KNOT_RUNDIR"
    chmod 775 "$KNOT_RUNDIR"
fi

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