#!/bin/sh

setglobal PI = '.postinstall'
setglobal TMP = '/usr/tmp'
setglobal PATH = '/bin:/usr/bin:/usr/local/bin'

if test "$Argc" -ne 1
{
	echo "Usage: $0 <package file>"
	exit 1
}

setglobal dir = $[pwd]
if test $1 = "-"
{ setglobal f = ''""
} else {	match $1 {
	with /* setglobal f = $1 
	with * setglobal f = ""$dir/$1"" 
	}
}

cd $TMP
rm -f $PI

if test -f $PI
{	echo "$PI is in $TMP, please remove it first."
	exit 1
}

if test ! -f $f
{	echo "Couldn't find package $f."
	exit 1
}

# can we execute bunzip2?
if bunzip2 --help !2 > !1 | grep usage >/dev/null
{	setglobal BUNZIP2 = 'bunzip2'
} else {	setglobal BUNZIP2 = 'smallbunzip2'
}

cat $f | $BUNZIP2 | pax -r -p e
if test -f $PI
{
	sh -e $PI
	rm -f $PI
}

for d in [/usr/man /usr/local/man /usr/gnu/man /usr/X11R6/man]
{	if test -d $d
	{ makewhatis $d
	}
}