#!/usr/local/bin/bash
#    BIABAM: Biabam Is A Bash Attachment Mailer
#    Copyright (C) 2000, 2003, 2004 Mads Martin Jørgensen <mmj@mmj.dk>
#
#    This program is free software; you can redistribute it
#    and/or modify it under the terms of the GNU General Public
#    License as published by the Free Software Foundation; either
#    version 2 of the License, or (at your option) any later
#    version.
#
#    This program is distributed in the hope that it will be
#    useful, but WITHOUT ANY WARRANTY; without even the implied
#    warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
#    PURPOSE.  See the GNU General Public License for more
#    details.
#
#    You should have received a copy of the GNU General Public
#    License along with this program; if not, write to the Free
#    Software Foundation, Inc., 59 Temple Place, Suite 330,
#    Boston, MA 02111-1307 USA

# change these to suit your needs
SENDMAIL=/usr/sbin/sendmail  # your Mail-Transfer-Agent
SENDMAIL_OPTS=               # and its required options
SP=,  # separator for filenames and recipients (default is the comma character)

# no user serviceable parts below this point
VERSION=0.9.7

if  [ $# -lt 2 ]; then
  echo "Usage:"
  echo "$0 filename1[${SP}filename2${SP}filenameN] [-s subject] recipient1[${SP}recipient2${SP}recipientN]"
  exit 1
fi

if ! which b64encode > /dev/null; then
  echo "This program needs the b64encode utility to perform base64 encoding."
  exit 1
fi

# Find out the number of files to attach
TOTAL_ATTACHMENTS=`echo "$1" | awk -F$SP '{print NF}'`

for i in `jot $TOTAL_ATTACHMENTS 1`;
do
  STR="'{print \$$i}'"
  # store filenames in an array
  ARR_ATTACHMENTS[$i]=`sh -c "echo "$1" | awk -F$SP $STR" `
done

if ! TEMPFILE="`mktemp /tmp/biabam.XXXXXX`"; then
  echo "Biabam is unable to create the temporary file."
  exit 1
fi

BASETEMP="`basename $TEMPFILE`"

for i in `jot $TOTAL_ATTACHMENTS 1`; do
  # array for attachments basename
  BASEATTACHMENT[$i]="`basename \"${ARR_ATTACHMENTS[$i]}\"`"
  # test if file exists
  if ! test -f "${ARR_ATTACHMENTS[$i]}"; then
    echo "File \"${ARR_ATTACHMENTS[$i]}\" is not a regular file."
    exit 1
  fi
  # array for temp files
  if ! TEMPUUENCODED[$i]="`mktemp /tmp/biabam.uu.XXXXXX`"; then
    echo "Biabam is unable to create the temporary uuencoded file."
    exit 1
  fi

  # use 'file' to get MIME type if possible
  TYPE[$i]="application/unknown"; # array for mime type files
  if which file > /dev/null ; then
    MIME=`file -bi -- "${ARR_ATTACHMENTS[$i]}"`
    MIME=${MIME/,*;/;}
    MIME=${MIME/%,*/}
    TYPE[$i]=${MIME:-application/unknown}
  fi

  b64encode -- "${ARR_ATTACHMENTS[$i]}" "${BASEATTACHMENT[$i]}" | \
  sed '1d;$d' > ${TEMPUUENCODED[$i]}
done

BOUNDARY="$BASETEMP$BASETEMP"

shift 		# skip over filename

# have they supplied a subject
SUBJECT="File delivery"
if [ a"$1" = "a-s" ]; then
  shift
  SUBJECT="$1"
  shift
fi

# Find out the number of recipients to send the email
TOTAL_EMAILS=`echo "$1" | awk -F$SP '{print NF}'`

for i in `jot $TOTAL_EMAILS 1`; do
  STR="'{print \$$i}'"
  # store recipients in an array
  ARR_EMAILS[$i]=`sh -c "echo "$1" | awk -F$SP $STR" `
done

TO="To:"

for i in `jot $TOTAL_EMAILS 1`; do
  # write the 'To:' field with all recipients previously stored in the array
  TO="$TO <${ARR_EMAILS[$i]}>,"
done

TO=${TO:0:${#TO}-1} # remove the last comma

echo $TO >> $TEMPFILE
echo "Subject: $SUBJECT" >> $TEMPFILE
echo "X-Mailer: BIABAM $VERSION" >> $TEMPFILE
echo "Message-ID: <`date +%Y%m%d%H%M%S`.$BASETEMP@biabam>" >> $TEMPFILE
echo "Mime-Version: 1.0" >> $TEMPFILE 
echo "Content-Type: multipart/mixed; boundary=\"$BOUNDARY\"" >> $TEMPFILE
echo "Content-Disposition: inline" >> $TEMPFILE
echo >> $TEMPFILE
echo >> $TEMPFILE
echo "--$BOUNDARY" >> $TEMPFILE
echo "Content-Type: text/plain; charset=us-ascii" >> $TEMPFILE
echo "Content-Disposition: inline" >> $TEMPFILE
echo >> $TEMPFILE
test -t 0 && echo "Email body (type CTRL-d on a blank line to finish):"
cat >> $TEMPFILE
echo >> $TEMPFILE

for i in `jot $TOTAL_ATTACHMENTS 1`; do
  echo "--$BOUNDARY" >> $TEMPFILE
  echo "Content-Type: ${TYPE[$i]}" >> $TEMPFILE
  echo "Content-Disposition: attachment; filename=\"${BASEATTACHMENT[$i]}\"" >> $TEMPFILE
  echo "Content-Transfer-Encoding: base64" >> $TEMPFILE
  echo >> $TEMPFILE
  # write all uuencoded attachments files in the email source code
  cat ${TEMPUUENCODED[$i]} >> $TEMPFILE
  echo >> $TEMPFILE
done

echo "--$BOUNDARY--" >> $TEMPFILE
echo >> $TEMPFILE

for i in `jot $TOTAL_EMAILS 1`; do
  # put all recipients together to call sendmail below
  RECIPIENTS="$RECIPIENTS ${ARR_EMAILS[$i]}"
done

cat $TEMPFILE | $SENDMAIL $SENDMAIL_OPTS $RECIPIENTS # here we call sendmail

for i in `jot $TOTAL_ATTACHMENTS 1`; do
  /bin/rm -f ${TEMPUUENCODED[$i]} # remove all temp files created
done

/bin/rm -f $TEMPFILE # remove the email source code tempfile