mail_to_self

#!/bin/bash

help() {
   echo 'usage: echo "mail text" | mail_to_self SUBJECT'
   echo '       mail_to_self SUBJECT TEXT'
   echo '       mail_to_self --help'
   echo
   echo '    deliver email to local mbox of user that is'
   echo '    executing this script'
   echo
   echo '    Requires the dmail executable from the'
   echo '    alpine/pine mailutils'
   echo
   exit 1
}

[ "$1" == "--help" ] && help

set -e          # stop on error
set -o pipefail # stop part of pipeline failing
set -u          # stop on undefined variable

local_user=`id -u --name`

if [ "$1" == "" ]; then
  echo "ERROR: you must set a subject"
  exit 2
else
  subject="$1"
fi

if [ -v 2 ]; then # if TEXT parameter was given
  pass_on_stdin=false
  text="$2"
else
  pass_on_stdin=true
fi

(
  echo "From: $local_user"
  echo "To: $local_user"
  echo "Subject: $subject"
  echo
  if [ "$pass_on_stdin" == "false" ]; then
    echo "$text"
  else
    cat # pass on STDIN
  fi

) | dmail $local_user