#! /bin/sh

# $Copyright:	$
# Copyright (c) 1984, 1985, 1986, 1987, 1988, 1989, 1990 
# Sequent Computer Systems, Inc.   All rights reserved.
#  
# This software is furnished under a license and may be used
# only in accordance with the terms of that license and with the
# inclusion of the above copyright notice.   This software may not
# be provided or otherwise made available to, or used by, any
# other person.  No title to or ownership of the software is
# hereby transferred.

#ident	"$Header: INSTALL 1.4 89/10/11 $@(#)sadmin:tools/INSTALL	1.2"
#	installation procedure for command packages

#	Command packages are shipped on a file system '/install'.
#	Below that point are the following directories and files:
#	/install/install/		contains the installation procedure
#	/install/install/INSTALL	actually installs the commands
#	/install/install/packagename	(optional) package identification
#	/install/install/preinstall	(optional) actions performed before
#					files are copied.
#	/install/install/postinstall	(optional) actions performed after
#					files are copied.
#	/install/new			the "root" of the files to be installed
#	/install/new/root		top of files going to / file system
#	/install/old	(optional)	where existing files are copied before
#					overwriting them.

pn=/install/install/packagename
if [ -r ${pn} ]
then
	chkyn -f "This diskette contains:
`cat ${pn}`
Do you want to install it?"  ||  exit 0
fi

trap exit 1 2 15
trap "rm -f /tmp/$$INSTALLlist" 0

#	Check for enough file system space.
cd /install/new
exit=0
for dir in *
{
	if [ ! -d ${dir} ]
	then
		continue
	fi
	newsize=`du -s ${dir}  |  sed 's/\([0-9]\{1,\}\).*/\1/'`
	if [ ${dir} = root ]
	then
		dir=/
	else
		dir=/${dir}
	fi
	spaceleft=`df ${dir}  |  sed 's/.* \([0-9]\{1,\}\) block.*/\1/'`
	if [ ${newsize} -gt ${spaceleft} ]
	then
		echo >&2 "	This package needs ${newsize} blocks in file system  ${dir}  and
there is only ${spaceleft} blocks left."
		exit=1
	fi
}
if [ ${exit} -ne 0 ]
then
	echo >&2 "Installation is not possible."
	exit 0
fi

#	Develop list of files to be installed.
find * -print  |  sort >/tmp/$$INSTALLlist

#	Do special work before files are copied in.
cd /install/install
if [ -f preinstall ]
then
	. ./preinstall
fi

#	Save original files if that is allowed for, i.e. /install/old exists.
if [ -d /install/old ]
then
	cd /
	for f in `cat /tmp/$$INSTALLlist`
	{
		if [ -f ${f}  -a  ! -f /install/old/${f} ]
		then
			echo ${f}
		fi
	}  |
		cpio -pdlmv /install/old/ 2>/dev/null  |
		sed '	1i\
	These files, that are going to be replaced, are being saved:
			s;^//*;/;
			s;/install/old/;;'
fi

#	Copy new files in.
cd /install/new
echo '
These files are being installed:'

grep -v '^root/' /tmp/$$INSTALLlist  |  cpio -pdlumv / 2>/dev/null
if [ -d root ]
then
	cd root
	sed -n '/^root\//s///p' /tmp/$$INSTALLlist  |
		cpio -pdlumv / 2>/dev/null
fi

#	Do special work after files are copied in.
cd /install/install
if [ -f postinstall ]
then
	. ./postinstall
fi

echo '
Installation complete.'
