#! /bin/sh

# hdtosym -- convert hard links to symlinks
# $Id: hdtosym,v 1.2 1998/07/10 19:13:18 cdua Exp cdua $
# Carlos Duarte, 970929/980709

#trap -- 'rm -f /tmp/xpto' EXIT SIGINT

USAGE="\
usage: $0 [-hn] files...

  -h      this help
  -n      no op
  -v      be verbose

Produce output to feed shell, that converts hard links to symbolic links.
Files that dont hard link to any other listed, are ignored.
"

while : ; do
	case x"$1" in 
	x-h)	echo "$USAGE"; exit 1 ;;
	x-n)	cmd=cat ;; 
	x-v)	verb=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 $# -eq 0; then echo "$USAGE"; exit 1; fi

ls -1di $* | sort -n | awk '

BEGIN {
	state = 0
	verb = '"${verb-0}"'
}

state == 0 {
	state++; 
	prev_inum = $1
	prev_name = $2
	next; 
}

state == 1 {
	if ($1 == prev_inum)
		state++; 
	else {
		prev_inum = $1
		prev_name = $2
		next
	}
}

state == 2 {
	if ($1 != prev_inum) {
		state = 1; 
		prev_inum = $1
		prev_name = $2
		next;
	}

	if (verb) print "echo", "rm -f", $2 "\\; ln -s", prev_name, $2
	print "rm -f", $2 "; ln -s", prev_name, $2
}' | ${cmd-sh}

#exit 0
exit