Listing 7: remuser.sh

#!/bin/sh
#######################################################
#
# remuser.sh -- deletes a user completely from system
#
#######################################################
# VARIABLES
TPWD=/tmp/tpwd.$$
PWFILE=/etc/passwd

chk_del() {

ID=`echo "$PWDLINE" | awk -F: '{print $3}'`
GID=`echo "$PWDLINE" | awk -F: '{print $4}'`
NAME=`echo "$PWDLINE" | awk -F: '{print $5}'`
HOMEDIR=`echo "$PWDLINE" |awk -F: '{print $6}'`
SH=`echo "$PWDLINE" | awk -F: '{print $7}'`

cat << EOF

Login name	$USERID
UID		$ID
Group ID		$GID
Description 	$NAME
Home Directory	$HOMEDIR
Shell Command	$SH

Last Chance! You are about remove the password
entry and all files owned by "${USERID}".

EOF

echo "Is it OK to proceed ? [(y/n) n] \c"
read ANSWER
case $ANSWER in
y*|Y*) echo "\nProceeding..."
;;
*) echo "\nExiting now..."
sleep 2
exit 1
;;
esac

# Remove files and then directories
find / -user $USERID -type f -print -exec rm {} \;
find / -user $USERID -type d -print -exec rmdir {} \;

# delete entry from password file
grep -v "^$USERID:" $PWFILE > $TPWD
cp $TPWD $PWFILE
chmod 444 $PWFILE
rm $TPWD
}

# mainline

clear

echo "\nPlease enter user to delete below..."
echo "USERID: \c"
read USERID
if [ -z $USERID ]
then
echo "\nNo user entered. Exiting now!"
sleep 2
elif grep "^$USERID:" $PWFILE > /dev/null
then
# Get passwd entry and call function to
# check if OK to delete and delete user
PWDLINE=`grep "^$USERID:" $PWFILE`
chk_del
else
echo "\n${USERID} not in $PWFILE. Exiting now..."
sleep 2
fi

# End of File