#!/bin/sh
# du-a of filesystem such as removable disk to labelled file < du-a.* >
#
# "*" of "du-a.*" means the mount point "/*" mounted media.
# If the name of this script is "du-a.mo", then target directory is "/mo".
# Output directory is "~/misc/rm-info" for infomation of removable media.
# Lable name of target media is wrote to the name "00_LABEL"
# in the target directory at first.
#
# Copyright (C) 1999 Taiji Yamada
#
DIR=/`echo $0|sed "s/.*du-a\.\(.*\)$/\1/"`
OUT=$HOME/misc/rm-info
CMD='du -a'
#
# checking label of file system
#
if [ ! -d $DIR/lost+found ]; then
  echo "ls-R.*: file system $DIR is not found."
  exit
fi
if [ -f $DIR/00_LABEL ]; then
  label=`cat $DIR/00_LABEL`
else
  echo -n "input label name: "
  read label
  echo -n $label > $DIR/00_LABEL
fi
#
# determin filename by label name for the file system and check updating
#
of=$OUT/$label.du-a.gz
if [ ! -f $of ]; then
  up="yes"
else
  up=`find $DIR/ -newer $of -print 2> /dev/null`
fi
#
# output information of file system to labelled file by du-a outputs
#
if [ "$up" = ""  ]; then
  exit
else
  (cd $DIR; $CMD . 2> /dev/null | gzip > $of)
  echo "updated at $label"
fi