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#!/bin/sh
#-------------------------------------------------------------------------
#
# destroyuser.sh--
# utility for destroying a user from the POSTGRES database.
#
# Copyright (c) 1994, Regents of the University of California
#
#
# IDENTIFICATION
# $Header: /cvsroot/pgsql/src/bin/destroyuser/Attic/destroyuser.sh,v 1.6 1996/11/17 03:55:07 bryanh Exp $
#
# Note - this should NOT be setuid.
#
#-------------------------------------------------------------------------
CMDNAME=`basename $0`
if [ -z "$USER" ]; then
if [ -z "$LOGNAME" ]; then
if [ -z "`whoami`" ]; then
echo "$CMDNAME: cannot determine user name"
exit 1
fi
else
USER=$LOGNAME
export USER
fi
fi
while (test -n "$1")
do
case $1 in
-a) AUTHSYS=$2; shift;;
-h) PGHOST=$2; shift;;
-p) PGPORT=$2; shift;;
*) DELUSER=$1;;
esac
shift;
done
if [ -z "$AUTHSYS" ]; then
AUTHOPT=""
else
AUTHOPT="-a $AUTHSYS"
fi
if [ -z "$PGHOST" ]; then
PGHOSTOPT=""
else
PGHOSTOPT="-h $PGHOST"
fi
if [ -z "$PGPORT" ]; then
PGPORTOPT=""
else
PGPORTOPT="-p $PGPORT"
fi
PARGS="-tq $AUTHOPT $PGHOSTOPT $PGPORTOPT"
#
# generate the first part of the actual monitor command
#
PSQL="psql $PARGS"
#
# see if user $USER is allowed to create new users. Only a user who can
# create users can delete them.
#
QUERY="select usesuper from pg_user where usename = '$USER'"
ADDUSER=`$PSQL -c "$QUERY" template1`
if [ $? -ne 0 ]
then
echo "$CMDNAME: database access failed."
exit 1
fi
if [ $ADDUSER != "t" ]
then
echo "$CMDNAME: $USER cannot delete users."
fi
#
# get the user name of the user to delete. Make sure it exists.
#
if [ -z "$DELUSER" ]
then
echo _fUnKy_DASH_N_sTuFf_ "Enter name of user to delete ---> "_fUnKy_BACKSLASH_C_sTuFf_
read DELUSER
fi
QUERY="select usesysid from pg_user where usename = '$DELUSER'"
RES=`$PSQL -c "$QUERY" template1`
if [ $? -ne 0 ]
then
echo "$CMDNAME: database access failed."
exit 1
fi
if [ ! -n "$RES" ]
then
echo "$CMDNAME: user "\"$DELUSER\"" does not exist."
exit 1
fi
SYSID=`echo $RES | sed 's/ //g'`
#
# destroy the databases owned by the deleted user. First, use this query
# to find out what they are.
#
QUERY="select datname from pg_database where datdba = '$SYSID'::oid"
ALLDBS=`$PSQL -c "$QUERY" template1`
if [ $? -ne 0 ]
then
echo "$CMDNAME: database access failed - exiting..."
exit 1
fi
#
# don't try to delete template1!
#
for i in $ALLDBS
do
if [ $i != "template1" ]
then
DBLIST="$DBLIST $i"
fi
done
if [ -n "$DBLIST" ]
then
echo "User $DELUSER owned the following databases:"
echo $DBLIST
echo
#
# Now we warn the DBA that deleting this user will destroy a bunch of databases
#
yn=f
while [ $yn != y -a $yn != n ]
do
echo _fUnKy_DASH_N_sTuFf_ "Deleting user $DELUSER will destroy them. Continue (y/n)? "_fUnKy_BACKSLASH_C_sTuFf_
read yn
done
if [ $yn = n ]
then
echo "$CMDNAME: exiting"
exit 1
fi
#
# now actually destroy the databases
#
for i in $DBLIST
do
echo "destroying database $i"
QUERY="drop database $i"
$PSQL -c "$QUERY" template1
if [ $? -ne 0 ]
then
echo "$CMDNAME: drop database on $i failed - exiting"
exit 1
fi
done
fi
QUERY="delete from pg_user where usename = '$DELUSER'"
$PSQL -c "$QUERY" template1
if [ $? -ne 0 ]
then
echo "$CMDNAME: delete of user $DELUSER was UNSUCCESSFUL"
else
echo "$CMDNAME: delete of user $DELUSER was successful."
fi
exit 0
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