#! /bin/sh -x
#
# rebuild-qi - unpack a mail message with the phone list and update the qi
#	server.  Report errors back to the nameserver administrator.
#
# Typically invoked by cron as
# 03 00 * * *	qiserv	/usr/local/libexec/rebuild-qi
#
# Written by Paul Pomes, University of Illinois, Computing Services Office
# Copyright (c) 1992 by Paul Pomes and the University of Illinois Board
# of Trustees.  
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
# 3. All advertising materials mentioning features or use of this software
#    must display the following acknowledgement:
#	This product includes software developed by the University of
#	Illinois, Urbana and its contributors.
# 4. Neither the name of the University nor the names of its contributors
#    may be used to endorse or promote products derived from this software
#    without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE TRUSTEES AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE TRUSTEES OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
# Email:  Paul-Pomes@uiuc.edu        USMail:	Paul Pomes
# ICBM:   40 06 47 N / 88 13 35 W		University of Illinois - CSO
#						1304 West Springfield Avenue
#						Urbana, Illinois,  61801-2910
# @(#)$Id$

# Root directory of nameserver files
ROOTDIR=/nameserv

# Shell script creates scratch files and builds new database here.
WORKDIR=$ROOTDIR/work

# Working database stored here.
DBDIR=$ROOTDIR/db

# Backup copy of database before update is stored here.
SAVEDIR=$ROOTDIR/old

# Modify $PATH to include nameserv commands.
PATH=$ROOTDIR/bin:$PATH
export PATH

# Minimum line count of an update file.  Helps guard against trash sent
# to the update alias.
UPDATEMIN=800

# Reset umask just in case.
umask 022

# Make all files in working directory.
cd $WORKDIR

# Be sure to remove prod.sta file in case of errors.
trap "rm -f $DBDIR/prod.sta; exit 1" 1

# See if there's work to do
if [ "`find . -type f -newer c.tape.raw -print 2>/dev/null`" != "./c.tape.mail" ];
then
	exit 0
fi

# Get fresh copy of config file.
cp $DBDIR/prod.cnf .

# Strip the incoming file of excess lines.
sed -e '1,/^\*\*\*\*\*  ATTACHMENT/d' -e '/^$/d' -e '$d' -e '/^/d' \
	< c.tape.mail > c.tape.raw

# Insure that the incoming file is of reasonable length.
if [ `wc -l < c.tape.raw` -lt $UPDATEMIN ];
then
	Mail -s "$WORKDIR/c.tape.raw file too short" < /dev/null
	exit 1
fi

# Mark the database as read-only.  "read" MUST be the first word!!
cat > $DBDIR/prod.sta << EOF
read database update
EOF

# Sleep to allow for pending queries to complete.  Not totally safe, but
# safe enough.
sleep 300

# Make a copy of the existing database directory.
cp $DBDIR/prod.* $SAVEDIR

# Crank the input through the unblocker.  Look for sundry errors.
rm -f c.tape
make c.tape

if [ `wc -l < c.tape.raw` -ne `wc -l < c.tape` ];
then
	Mail -s "Line count of c.tape and c.tape.raw not equal" < /dev/null
	exit 1
fi

grep -v in-house c.tape > out-house
if [ -s out-house ];
then
	Mail -s "Entries with bad phone numbers" postmaster < out-house
fi

# Let her rip through the rest.
make > make.log 2>&1

# Copy new directory into place.
cp prod.* $DBDIR
rm $DBDIR/prod.sta

# Report stuff
echo "" >> make.log
echo `wc -l < c.kill` entries marked as left >> make.log
echo `wc -l < c.kill.dead` entries deleted >> make.log

Mail -s "ph database rebuild results" postmaster < make.log

exit 0