#!/bin/sh
##
## SCRIPT NAME: get_memory_and_swap.sh
##
#############################################################################
## PURPOSE:
##    Gets 'memory' and 'swap' data from output of the 'free' command.
##
## Example output from the 'free -m -o' command:
##
##              total       used       free     shared    buffers     cached
## Mem:          3275        595       2679          0        114        243
## Swap:         2290          0       2290
##
## where '-m' means the data is shown in megabytes instead of the default of
## kilobytes --- and '-o' means that a line of buffer/cache data is not shown.
##
## This script gets the data from the 'total' and 'used' columns.
##
#############################################################################
## CALLED BY: a Tk GUI script that shows 'memory' and 'swap' data
##            as needle readings on a couple of meters (dials) drawn
##            on a Tk canvas --- Tk script name:
##                    meters_memory_swap.tk
##
#############################################################################
## MAINTENANCE HISTORY:
## Updated by: Blaise Montandon 2013aug08 Started this script on Linux,
##                                        using Ubuntu 9.10 (2009 October,
##                                        'Karmic Koala').
## Updated by: Blaise Montandon 20.......
#############################################################################

## FOR TESTING:
#  set -x

# FREEOUT=`free -m -o | tail -2 | cut -c6-30 | tr '\n' ' ' | sed 's/  */ /g'`

free -m -o | tail -2 | cut -c6-30 | tr '\n' ' ' | sed 's/  */ /g'