Slugsy mail

gistfile1.sh

#!/bin/sh
# Simple mail(1) replacement

# Software name and version
SWNAME="Slugsy-mail"
SWVER="0.1"
SWSIG="${SWNAME}/${SWVER}"

# From
FROM="`hostname -s`@`hostname -d`"
NAME="Slugsy"
SIGN="n-- n${NAME}"

# Globals
SUBJ=""
TO=""
CC=""
BCC=""
BODY=""
EMPTY=""
VERB=""

# Check for positional parameters
until [ -z "$1" ]
  do
  case "$1" in
    "-s") shift; SUBJ="$1";;
    "-c") shift; CC="$1";;
    "-b") shift; BCC="$1";;
    "-v") VERB="1";;
    "-E") EMPTY="1";;
    *) TO="$1";;
  esac
  shift
done

# Create the headers
HDR=""
if [ -z "${NAME}" ]
then
  HDR="${HDR}From: ${NAME} <${FROM}>n"
else
  HDR="${HDR}From: ${FROM}n"
fi
if [ -z "${TO}" ]
then
  echo "Missing recipient's address."
  exit 1
else
  HDR="${HDR}To: ${TO}n"
fi
if [ ! -z "${CC}" ]
then
  HDR="${HDR}Cc: ${CC}n"
fi
if [ ! -z "${BCC}" ]
then
  HDR="${HDR}Bcc: ${BCC}n"
fi
if [ -z "${SUBJ}" ]
then
  echo "Missing subject."
  exit 2
else
  HDR="${HDR}Subject: ${SUBJ}n"
fi

# Add the user agent signature
HDR="${HDR}User-Agent: ${SWSIG}n"

# Read the body
if [ -z "${BODY}" ]
then
  while read LINE
  do
    if [ "${LINE}" == "." ]
    then
      break
    else
      BODY="${BODY}${LINE}n"
    fi
  done
fi
# Check if the body is empty
if [ -z "${BODY}" -a "${EMPTY}" ]
then
  echo "The email body is empty."
  exit 3
fi

# Send to email account
echo -e -n "${HDR}n${BODY}${SIGN}" | /usr/sbin/sendmail -t