#!/bin/bash

DO_JSON=0
MY_PATH=$(dirname $0)
LOGINDEFS="/etc/login.defs"
PASSFILE="/etc/passwd"
USER_NAME="unknown"
ID="unknown"

output_results_json()
{

    echo "{"
    echo "  \"username\": \"${USER_NAME}\","
    echo "  \"id\": \"${ID}\""
    echo "}"
}

output_results()
{
    do_json=${1}

    if [ ${do_json} -eq 1 ]; then
        output_results_json
    else
        echo "username:${USER_NAME}"
        echo "id:${ID}" 
    fi
}

set_user_info()
{
    if [ -f ${LOGINDEFS} ]; then
        ID=$(cat ${LOGINDEFS} | grep ^UID_MIN | tr -s " " | cut -d' ' -f2)
    fi
  
    if [[ ${ID} != "unknown" && -f ${PASSFILE} ]]; then
        # The 3rd token is the UID
        IDLINE=$(cat ${PASSFILE} | cut -d':' -f3 | grep -w -in ${ID} | cut -d':' -f1)

        if [ ! -z ${IDLINE} ]; then
            USER_NAME=$(sed "${IDLINE}q;d" ${PASSFILE} | cut -d':' -f1)
        fi
    fi

}

##### MAIN #####
source ${MY_PATH}/general_funcs.bash

arg_has_json "$@"
if [ $? -eq 0  ]; then
    DO_JSON=1
fi

set_user_info
output_results ${DO_JSON}
exit 0