#!/bin/sh
#
#- bufile --
#-	This application makes a backup copy of a file.
#-
# Usage:
#	bufile [-l] file
#
# The copy will named backup/file_YYYYMMDDHHMMSS, where the
# suffix is the creation time.  A local directory named backup
# will be created if it does not already exist.
#
# With -l option, process will prompt for a log entry, which will be appended
# to backup/file.log
#
# Copyright (c) 2011 Gordon D. Carrie
# 
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
# 
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
# 
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
# Please send feedback to dev0@trekix.net

if [ $# -eq 1 ]
then
    fl=$1
elif [ $# -eq 2 -a $1 = "-l" ]
then
    fl=$2
    log=backup/${fl}.log
else
    echo Usage: $0 file
    exit 1
fi
mkdir -p backup
sfx=`date +"%Y%m%d%H%M%S"`
fl_bu=backup/${fl}_$sfx
cp $fl $fl_bu
chmod 444 $fl_bu
if test $log
then
    touch $log
    printf "\n%s\n" $sfx >> $log
    echo "Enter log entry:"
    cat >> $log
fi
echo $fl_bu