UNIX for Dummies Questions & Answers

#!/bin/ksh

# We have to invoke a mailer that has no escape possibilities...
#
# The only one I know of would be sendmail, but this is very ugly
# to invoke directly because we have no control of To: and
# Subject: lines...
#
# This wrapper writes some of the Header-Fields before forwarding the
# mail itself in the body
#
# usage: start-mail mailaddr subject

# you might want to change the following line to set a sepcific from: address
#sender=`/usr/bin/id|/usr/bin/sed 's/.*(\(.*\)) .*/\1/'`
sender='root@'`/usr/bin/hostname`

# it's a bad idea to use temporary files with predictable names that are
# located in a world-writable /tmp dir because other local users may create
# sym-links pointing to another file...
#
# better use a tmp-dir that is only accessible by the logsurfer user
# change the following line!
# example: TMP=/home/logsurfer
TMP=/tmp

recepient="$1"
subject="$2"
message="$3"

if [ $# -eq 0 ]; then
	echo 'usage: start-mail mailaddr subject' 1>&2
	exit 1
fi

/bin/rm -f $TMP/start-mail.$$

echo "From: $sender" > $TMP/start-mail.$$
echo "To: $recepient" | /usr/bin/tr -cd '[\040-\176]' >> $TMP/start-mail.$$
echo "" >> $TMP/start-mail.$$
if [ $# -gt 1 ]; then
	shift
	echo "Subject: $subject" | /usr/bin/tr -cd '[\040-\176]' >> $TMP/start-mail.$$
	echo "" >> $TMP/start-mail.$$
else
	echo "Subject: (no subject given - logsurfer output)" >> $TMP/start-mail.$$
fi
echo "" >> $TMP/start-mail.$$
echo "$message" | /usr/bin/tr -cd '[\040-\176]' >>/$TMP/start-mail.$$
echo "\n." >>/$TMP/start-mail.$$


cat $TMP/start-mail.$$ - | /usr/lib/sendmail -odq -t

/bin/rm -f $TMP/start-mail.$$

mailx -s "This is my Subject" "my@emailadres" << EOF
And this is my message. Just
until I am finished
Like now
EOF