#!/usr/bin/env bash
{
    l_pkgoutput=""
    if command -v dpkg-query >/dev/null 2>&1; then
        l_pq="dpkg-query -W"
    elif command -v rpm >/dev/null 2>&1; then
        l_pq="rpm -q"
    fi
    l_pcl="gdm gdm3" # Space seporated list of packages to check
    for l_pn in $l_pcl; do
        $l_pq "$l_pn" >/dev/null 2>&1 && l_pkgoutput="$l_pkgoutput\n -Package: \"$l_pn\" exists on the system\n - checking configuration"
    done
    if [ -n "$l_pkgoutput" ]; then
        output="" output2="" 
        l_gdmfile="$(grep -Pril '^\h*disable-user-list\h*=\h*true\b' /etc/dconf/db )"
        if [ -n "$l_gdmfile" ]; then
            output="$output\n - The \"disable-user-list\" option is enabled in \"$l_gdmfile\""
            l_gdmprofile="$(awk -F\/ '{split($(NF-1),a,".");print a[1]}' <<<"$l_gdmfile")"
            if
                grep -Pq "^\h*system-db:$l_gdmprofile" /etc/dconf/profile/"$l_gdmprofile"
            then
                output="$output\n - The \"$l_gdmprofile\" exists"
            else
                output2="$output2\n - The \"$l_gdmprofile\" doesn't exist"
            fi
            if [ -f "/etc/dconf/db/$l_gdmprofile" ]; then
                output="$output\n - The \"$l_gdmprofile\" profile exists in the dconf database"
            else
                output2="$output2\n - The \"$l_gdmprofile\" profile doesn't exist in the dconf database"
            fi
        else
            output2="$output2\n - The \"disable-user-list\" option is not enabled"
        fi
        if [ -z "$output2" ]; then
            echo -e "$l_pkgoutput\n- Audit result:\n *** PASS: ***\n$output\n"
        else
            echo -e "$l_pkgoutput\n- Audit Result:\n *** FAIL: ***\n$output2\n"
            [ -n "$output" ] && echo -e "$output\n"
        fi
    else
        echo -e "\n\n - GNOME Desktop Manager isn't installed\n - Recommendation is Not Applicable\n- Audit result:\n *** PASS ***\n"
    fi
}