#!/bin/sh -e
# Copyright (c) 1991 Bell Communications Research, Inc. (Bellcore)
# 
# Permission to use, copy, modify, and distribute this material 
# for any purpose and without fee is hereby granted, provided 
# that the above copyright notice and this permission notice 
# appear in all copies, and that the name of Bellcore not be 
# used in advertising or publicity pertaining to this 
# material without the specific, prior written permission 
# of an authorized representative of Bellcore.  BELLCORE 
# MAKES NO REPRESENTATIONS ABOUT THE ACCURACY OR SUITABILITY 
# OF THIS MATERIAL FOR ANY PURPOSE.  IT IS PROVIDED "AS IS", 
# WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES.

# Conversion from C shell to Bourne shell by Z-Code Software Corp.
# Conversion Copyright (c) 1992 Z-Code Software Corp.
# Permission to use, copy, modify, and distribute this material
# for any purpose and without fee is hereby granted, provided
# that the above copyright notice and this permission notice
# appear in all copies, and that the name of Z-Code Software not
# be used in advertising or publicity pertaining to this
# material without the specific, prior written permission
# of an authorized representative of Z-Code.  Z-CODE SOFTWARE
# MAKES NO REPRESENTATIONS ABOUT THE ACCURACY OR SUITABILITY
# OF THIS MATERIAL FOR ANY PURPOSE.  IT IS PROVIDED "AS IS",
# WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES.

if [ -z "$METAMAIL_TMPDIR" ]
then
	METAMAIL_TMPDIR=/tmp
fi



if test -z "$3" -o ! -z "$5"
then
	echo "Usage: showpartial file id partnum totalnum"
	exit 1
fi

file=$1

# This next line is because message-id can contain weird chars
id=$(echo "$2" | tr -d \!\$\&\*\(\)\|\'\"\;\/\<\>\\\\ )

partnum=$3

if test -z "$4"
then
	totalnum=-1
else
	totalnum=$4
fi

if [ -n "$HOME" ] ; then
# If we have a home directory, create a temporary dir and
# store the name there unless the file already exists
# and the directory it points to is valid directory
	[ -e "$HOME/.metamail_treeroot" ] && TREEROOT=`cat $HOME/.metamail_treeroot`
	[ -e "$TREEROOT" ] && [ ! -d "$TREEROOT" ] && rm -f "$TREEROOT" 
	if [ ! -e "$HOME/.metamail_treeroot" ] || [ ! -e "$TREEROOT" ]; then
		TREEROOT=`mktemp -d -t msg-parts.XXXXXX` || { echo "$0: Cannot create temporary dir!" >&2 ; exit 1; }
		echo $TREEROOT >$HOME/.metamail_treeroot
	fi
else
	TREEROOT=$METAMAIL_TMPDIR/msg-parts-`whoami`
	# Sanity check: is this a directory?
	[ -e "$TREEROOT" ] && [ ! -d "$TREEROOT" ] && rm -f "$TREEROOT" 
	# Sanity check, does it belong to us?
	if [ -d "$TREEROOT" ] ; then
		treeuid=`stat -c %u "$TREEROOT"`
		if [ "$treeuid" -ne "`id -u`" ]; then
			echo "$0: Tried to use $TREEROOT but it does not belong to us! Aborting." >&2
			exit 1
		fi
	else
		mkdir -p "$TREEROOT" || { echo "$0: Cannot create dir $TREEROOT!" >&2 ; exit 1; }
	fi

fi
if test ! -d "${TREEROOT}/$id"
then
	mkdir "${TREEROOT}/$id"
	if test $? -ne 0
	then
	        echo mkdir "${TREEROOT}/$id" failed
		exit 1
	fi
fi

cp $file "${TREEROOT}/$id/$partnum"
if test $? -ne 0
then
	echo cp $file "${TREEROOT}/$id/$partnum" failed
	exit 1
fi

if test $totalnum -eq -1
then
	if test -r "${TREEROOT}/$id/CT"
	then
		totalnum=`cat "${TREEROOT}/$id/CT"`
	else
    		totalnum=-1
	fi
else
	echo $totalnum > "${TREEROOT}/$id/CT"
fi

# Slightly bogus here -- the shell messes up the newlines in the headers
# if ($partnum == 1) then
#     echo $MM_HEADERS > "${TREEROOT}/$id/HDRS"
# endif
found=0
ix=1
list=
limit=$totalnum
if test "$limit" -eq -1
then
	limit=25
fi

while test "$ix" -le "$limit"
do
	if test -f "${TREEROOT}/$id/$ix"
	then
		list="$list $ix"
		found=$(($found + 1))
	fi
	ix=`expr $ix + 1`
done

if test $found = "$totalnum"
then
	cd "${TREEROOT}/$id"
	cat $list > "${TREEROOT}/$id/FULL"
	rm $list
	echo All parts of this "${totalnum}"-part message have now been read.
	metamail -d < "${TREEROOT}/$id/FULL"
	echo WARNING:  To save space, the full file is now being deleted.  
	echo You will have to read all "$totalnum" parts again to see the full message again.
	rm "${TREEROOT}/$id/FULL"
	rm "${TREEROOT}/$id/CT"
	cd ${METAMAIL_TMPDIR}
	rmdir "${TREEROOT}/$id"
	rmdir ${TREEROOT} > /dev/null 2>&1
	[ -e "$HOME/.metamail_treeroot" ] && > "$HOME/.metamail_treeroot" 
else
	if test "$totalnum" -eq -1
	then
		echo So far you have only read $found of the several parts of this message.
	else
		echo So far you have only read $found of the "$totalnum" parts of this message.
	fi
	echo When you have read them all, then you will see the message in full.
fi