#!/bin/bash
# This script send a text sms at the command line by creating
# a sms file in the outgoing queue.

# $1 is the destination phone number.
# $2 is the message text.
# If you leave $2 or both empty, the script will ask you.
# If you give more than 2 arguments, last is taken as a text and
# all other are taken as destination numbers.
# If a destination is asked, you can type multiple numbers
# delimited with spaces.

# Keys for example: "password" and "keke":
# KEYS="5f4dcc3b5aa765d61d8327deb882cf99 4a5ea11b030ec1cfbc8b9947fdf2c872 "

KEYS=""

# When creating keys, remember to use -n for echo:
# echo -n "key" | md5sum

smsd_group="smsd"

# Will need echo which accepts -n argument:
ECHO=echo
case `uname` in
  SunOS)
    ECHO=/usr/ucb/echo
    ;;
esac

if ! [ -z "$KEYS" ]; then
  printf "Key: "
  read KEY
  if [ -z "$KEY" ]; then
    echo "Key required, stopping."
    exit 1
  fi
  KEY=`$ECHO -n "$KEY" | md5sum | awk '{print $1;}'`
  if ! echo "$KEYS" | grep "$KEY" >/dev/null; then
    echo "Incorrect key, stopping."
    exit 1
  fi
fi

DEST=$1
TEXT=$2

if [ -z "$DEST" ]; then
  printf "Destination(s): "
  read DEST
  if [ -z "$DEST" ]; then
    echo "No destination, stopping."
    exit 1
  fi
fi

if [ -z "$TEXT" ]; then
  printf "Text: "
  read TEXT
  if [ -z "$TEXT" ]; then
    echo "No text, stopping."
    exit 1
  fi
fi

if [ $# -gt 2 ]; then
  n=$#
  while [ $n -gt 1 ]; do
    destinations="$destinations $1"
    shift
    n=`expr $n - 1`
  done
  TEXT=$1
else
  destinations=$DEST
fi

echo "-- "
echo "Text: $TEXT"

ALPHABET=""
if which iconv > /dev/null 2>&1; then
  if ! $ECHO -n "$TEXT" | iconv -t ISO-8859-15 >/dev/null 2>&1; then
    ALPHABET="Alphabet: UCS"
  fi
fi

group=""
if [ -f /etc/group ]; then
  if grep $smsd_group: /etc/group >/dev/null; then
    group=$smsd_group
  fi
fi

for destination in $destinations
do
  echo "To: $destination"

  TMPFILE=`mktemp /tmp/smsd_XXXXXX`

  $ECHO "To: $destination" >> $TMPFILE
  [ -n "$ALPHABET" ] && $ECHO "$ALPHABET" >> $TMPFILE
  $ECHO "" >> $TMPFILE
  if [ -z "$ALPHABET" ]; then
    $ECHO -n "$TEXT" >> $TMPFILE
  else
    $ECHO -n "$TEXT" | iconv -t UNICODEBIG >> $TMPFILE
  fi

  if [ "x$group" != x ]; then
    chgrp $group $TMPFILE
  fi

  chmod 0660 $TMPFILE

  FILE=`mktemp /var/spool/sms/outgoing/send_XXXXXX`
  mv $TMPFILE $FILE
done
