Create a custom sender config file for spamdyke using a template

spamdyke-sender-conf

#!/usr/bin/env bash
#
# Quinn Comendant <quinn@strangecode.com>
# 06 May 2017 14:45:53


#
# Functions
#

function usage() {
    echo "Usage: $(basename $0) ADDR

Create a custom sender config file for spamdyke using a template.

- if ADDR is a hostname add config to /var/qmail/spamdyke/_sender_/com/example/subdom
- if ADDR is an IP address add config to /var/qmail/spamdyke/_ip_/111/222/333/444

Then the config files will be opened in $EDITOR (e.g., subdom or 444 is the config file).
";
    exit 1;
}

#
# Main
#

if [[ $(id -u) != 0 ]]; then
    echo "You must be root to execute this script";
    exit;
fi

# Display help if run without arguments.
[[ $# == 0 ]] && usage && exit 0;

[[ $# != 1 ]] && echo "Invalid arguments. Run with -h for help." && exit 1;

EDITOR=${EDITOR:-vim};
SPAMDYKEBASEDIR='/var/qmail/spamdyke';
SPAMDYKECONFTEMPLATE="reject-missing-sender-mx=0
reject-empty-rdns=0
reject-unresolvable-rdns=0
graylist-level=none
";

ADDR=$1;
if [[ $ADDR =~ [0-9]+\.[0-9]+\.[0-9]+\.[0-9]+ ]]; then
    # ADDR is a IP address
    IFS='.' read -r -a ADDRPARTS <<< "$ADDR";
    CONFDIR=$(printf '%s/_ip_/%d/%d/%d' "$SPAMDYKEBASEDIR" "${ADDRPARTS[0]}" "${ADDRPARTS[1]}" "${ADDRPARTS[2]}");
    mkdir -p "$CONFDIR";
    CONFFILE=$(printf '%s/%d' "$CONFDIR" "${ADDRPARTS[3]}");
    cat - > "$CONFFILE" <<<"$SPAMDYKECONFTEMPLATE";
    test -f "$CONFFILE" && vim "$CONFFILE";
else
    # Otherwise assume is a hostname.
    ADDRPARTS=$(echo "$ADDR" | tr '.' $"\n" | tac | tr $"\n" '/');
    CONFDIR=$(printf '%s/_sender_/%s' "$SPAMDYKEBASEDIR" "$(dirname "$ADDRPARTS")");
    mkdir -p "$CONFDIR";
    CONFFILE=$(printf '%s/%s' "$CONFDIR" "$(basename "$ADDRPARTS")");
    cat - > "$CONFFILE" <<<"$SPAMDYKECONFTEMPLATE";
    test -f "$CONFFILE" && vim "$CONFFILE";
fi

chown -R vpopmail:vchkpw $SPAMDYKEBASEDIR/{_ip_,_sender_};

exit 0;