#! /bin/sh

# split-big-dir -- split a big dir, into several of approx same size 
# $Id: split-big-dir,v 1.2 1998/07/10 19:15:27 cdua Exp cdua $
# Carlos Duarte, 970516

# take SOURCE-DIR and spread all its files into 1/ 2/ 3/ ... 
# with du 1/ 2/ apprx equal to SPACE

trap -- 'rm -f $temp; rmdir $dir' EXIT SIGINT

USAGE="\
usage: $0 [-hn] source-dir space

  -h      this help

space in Kb, or whatever du reports.
"

while : ; do
	case x"$1" in 
	x-h)	echo "$USAGE"; exit 1 ;;
	x--)	shift; break ;;
	x-?)	echo "invalid option -- `echo $1|cut -c2-`"
		echo "$USAGE"; exit 1 ;;
	*)	break ;;
	esac
	shift
done

# if _must_ accept on extra argument after options
if test $# -ne 2; then echo "$USAGE"; exit 1; fi

dir=$1
spc=$2

temp=zz.temp.lst.$$.
ls -a1 $dir | sed -e '/^\.$/d' -e '/^\.\.$/d' > $temp

exec 3<$temp
while : ; do 
	sdir=1
	while test -d $sdir; do sdir=`expr $sdir +  1`; done
	mkdir $sdir
	while test `du $sdir | cut -f1` -lt $spc; do
		read file 0<&3 || break 2
		mv $dir/$file $sdir
	done
done
exec 3<&-
exit