/bin/datestr

#!/bin/env ksh
#
# Copyright (C) Young, Fey <fey.young@gmail.com>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
# SCRIPT: datestr
# AUTHOR: Young, Fey
# DATE:   2010-8-30
# REV:    1.0.P
#
# PURPOSE: print the current datetime in specified format
#
# set -n # Uncomment to check syntax without execution
#
# set -x # Uncomment to debug
#
############################# FUNCTIONS ##################################
function usage {
    echo "Usage: datestr [option]"
    echo "  -s, --short       YYYY-mm-dd"
    echo "  -l, --long        YYYY-mm-dd HH:MM:SS"
    echo "  -c, --compact     YYYYmmdd"
    echo "  -d, --default     YYYYmmddHHMMSS"
    exit 1
}

################################ MAIN ####################################
if (( $# > 1 ))
then
    usage
fi

flag='-d'

if (( $# == 1 ))
then
    flag=$1
fi

case $flag in
    '-d')
        date '+%Y%m%d%H%M%S'
        ;;
    '-s')
        date '+%Y-%m-%d'
        ;;
    '-c')
        date '+%Y%m%d'
        ;;
    '-l')
        date '+%Y-%m-%d %H:%M:%S'
        ;;
    *)
        usage
esac

# End of script