#! /bin/sh

# backup shell script
# arguments are list of files to backup
# creates sub-directory  ./bak/<time_date>
# copies given files to that subdirectory,
#   and then compresses them in background.

if [ "-h" = "$1" -o "-help" = "$1" ]
then
	echo "Usage: $0 [ <files> ]"
	echo "  Copies the list files to a subdirectory, and compresses them."
	echo "  The subdirectories name is based on the current time and date."
	echo "  Default is to copy all files in the current directory"
	echo
	echo "  Example:"
	echo "  csh> touch fred; backup  fred; ls -R bak;"
	echo "  Thu_Jan_14_15:01:55_CST_1993"
	echo
	echo "  bak/Thu_Jan_14_15:01:55_CST_1993:"
	echo "  fred"
	echo
	exit 0
fi

d=`date | sed "s/ /_/g"`
f=$*

if [ -z "$f" ]
then
   f=*
fi

if [ -f bak ]
then
	mv bak bak.orig
fi
if [ ! -d bak ]
then
	mkdir bak
fi

mkdir bak/$d
cp $f bak/$d 
echo $d
gzip bak/$d/* &
# compress bak/$d/* &