memory - scripts - various script and utils
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       ---
       memory (772B)
       ---
            1 #!/bin/sh
            2 #
            3 # z3bra - (c) wtfpl 2014
            4 
            5 usage () {
            6     cat <<EOF
            7 usage: $(basename $0) [-hptu]
            8     -h : print help
            9     -p : percentage of memory used (default)
           10     -t : total available memory
           11     -u : memory used
           12 EOF
           13 }
           14 
           15 # display the total of available memory in human readable format
           16 memtotal () {
           17     awk '/MemTotal/{print $2*1000}' /proc/meminfo
           18 }
           19 
           20 # display the memory used
           21 memused () {
           22     awk '
           23       /MemTotal/ {t = $2}
           24       /MemFree/  {f = $2}
           25       /^Buffers/ {b = $2}
           26       /^Cached/  {c = $2}
           27       END {print (t-f-c-b)*1000}' /proc/meminfo
           28 }
           29 
           30 # display the memory used in percentage
           31 memperc () {
           32     printf "%s%%\n" `echo "scale=1;100 * $(memused) / $(memtotal)" | bc`
           33 }
           34 
           35 
           36 case $1 in
           37     -h) usage;;
           38     -t) memtotal;;
           39     -u) memused;;
           40      *) memperc;;
           41  esac