#!/bin/sh -e
#
# mem_available: grab the current memory and usage
#
# Copyright (C) 2008 Canonical Ltd.
# Copyright (C) 2011-2014 Dustin Kirkland
#
# Authors: Dustin Kirkland <kirkland@byobu.org>
#
# 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, version 3 of the License.
#
# 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/>.
__memory_detail() {
free
}
__memory() {
local free="" total="" buffers="" cached=""
local kb_main_used=0 buffers_plus_cached=0 fo_buffers=0 fo_cached=0
if [ -r /proc/meminfo ]; then
while read tok val unit; do
case "$tok" in
MemTotal:) total=${val};;
MemFree:) free=${val};;
Buffers:) buffers=${val};;
Cached:) cached=${val};;
esac
[ -n "${free}" -a -n "${total}" -a -n "${buffers}" -a -n "${cached}" ] && break;
done < /proc/meminfo
elif eval $BYOBU_TEST vm_stat >/dev/null 2>&1; then
# MacOS support
# calculation borrowed from http://apple.stackexchange.com/a/48195/18857
free_blocks=$(vm_stat | grep free | awk '{ print $3 }' | sed -e 's/\.//')
inactive_blocks=$(vm_stat | grep inactive | awk '{ print $3 }' | sed -e 's/\.//')
speculative_blocks=$(vm_stat | grep speculative | awk '{ print $3 }' | sed -e 's/\.//')
free=$((($free_blocks+speculative_blocks)*4))
inactive=$(($inactive_blocks*4))
total=$((($free+$inactive)))
buffers=0
cached=0
fi
kb_main_used=$(($total-$free))
buffers_plus_cached=$(($buffers+$cached))
# "free output" buffers and cache (output from 'free')
fo_buffers=$(($kb_main_used - $buffers_plus_cached))
fpdiv $((100*${fo_buffers})) "${total}" 0;
usage=${_RET}
if [ $total -ge 1048576 ]; then
fpdiv "$total" 1048567 1
total=${_RET}
unit="$ICON_GB"
elif [ $total -ge 1024 ]; then
fpdiv "$total" 1024 0
total=${_RET}
unit="$ICON_MB"
else
unit="$ICON_KB"
fi
if [ $usage -gt 90 ]; then
# Change foreground to yellow, if usage over 90%
fg="Y"
else
fg="W"
fi
[ -n "$total" ] || return
color b g W; printf "%s" "$total"; color -; color g W; printf "%s" "$unit"; color -; color b g "$fg"; printf "%s" "$usage"; color -; color g "$fg"; printf "%s" "$PCT"; color --
}
# vi: syntax=sh ts=4 noexpandtab
Mini Shell