Mini Shell

#!/bin/sh

# Triggered by initqueue/online and starts rsyslogd with bootparameters

type getarg >/dev/null 2>&1 || . /lib/dracut-lib.sh

# prevent starting again if already running
if [ -f /var/run/syslogd.pid ]; then
    read pid < /var/run/syslogd.pid
    kill -0 $pid && exit 0
fi

rsyslog_config() {
    local server=$1
    shift
    local syslog_template=$1
    shift
    local filters=$*
    local filter=

    cat $syslog_template

    (
        # disable shell expansion / globbing
        # since filters contain such characters
        set -f
        for filter in $filters; do
            echo "${filter} @${server}"
        done
    )
    #echo "*.* /tmp/syslog"
}

[ -f /tmp/syslog.type ] && read type < /tmp/syslog.type
[ -f /tmp/syslog.server ] && read server < /tmp/syslog.server
[ -f /tmp/syslog.filters ] && read filters < /tmp/syslog.filters
[ -z "$filters" ] && filters="kern.*"
[ -f /tmp/syslog.conf ] && read conf < /tmp/syslog.conf
[ -z "$conf" ] && conf="/etc/rsyslog.conf" && echo "$conf" > /tmp/syslog.conf

if [ $type == "rsyslogd" ]; then
    template=/etc/templates/rsyslog.conf
    if [ -n "$server" ]; then
        rsyslog_config "$server" "$template" "$filters" > $conf
        rsyslogd -c3
    fi
fi