: script to submit a file as a piece of work to a teacher
Mailer=/bin/mailx	# OK for suns and IBM AIXs
# Mailer=/usr/sbin/Mail    #  good for SGIs
whoto1=dick
class=CS202
echo "Preparing to send message to $whoto1"
echo "Tap CTRL/C to cancel"
subject=${1:-unknown}
if [ x"$subject" = xunknown ]
then
	echo "Please input a subject: "
	read subject
fi

if [ x"$subject" = x ]
then
	echo "Messages without a subject can not be submitted"
	exit 1
fi

file=${2:-"$subject"}  # default: subject is also file...
if [ x"$file" = xunknown -o ! -r "$file" -o ! -t 0 ]
then
	if [ x"$file" != xunknown -a ! -r "$file" ]
	then 
		echo $file is not readable or does not exist
		file=unknown
	else
		echo $file will be submitted
		echo "		(Long lines will be word wrapped)"
	fi
	if [ x"$file" = xunknown -a -t 0 ]
	then
		echo "Please input your posting ending with CTRL/D on a new line"
		echo "		(Tap CTRL/C to cancel message)"
		echo "		(Long lines will be word wrapped)"
		echo "Subject: $class: $subject"
	else
		echo "Reading your message from standard input..."
	fi
	tmpfile=/tmp/submit$$
	trap "rm $tmpfile" 0 1 2 3
	br >$tmpfile
	if [ -s $tmpfile ]
	then sed '/^From /s/^/> /'<$tmpfile|$Mailer  -s "$class: $subject" $LOGNAME $whoto
		echo "Thank you, message sent. You will also get a copy."
	else
		echo "Empty message not sent"
	fi
else
	echo "submitting message with subject  \"$subject\" from file $file"
	br <$file | sed '/^From /s/^/> /'  |$Mailer -s "$class: $subject" $LOGNAME $whoto1
	echo "Thank you, message sent. You will also get a copy."
fi