dotfiles/symlinks/bin/blocks-scripts/wifi

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#!/bin/bash
# Copyright (C) 2014 Alexander Keller <github@nycroth.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/>.
#------------------------------------------------------------------------
INTERFACE="${BLOCK_INSTANCE:-wlan0}"
#------------------------------------------------------------------------
# As per #36 -- It is transparent: e.g. if the machine has no battery or wireless
# connection (think desktop), the corresponding block should not be displayed.
[[ ! -d /sys/class/net/${INTERFACE}/wireless ]] ||
[[ "$(cat /sys/class/net/$INTERFACE/operstate)" = 'down' ]] && exit
#------------------------------------------------------------------------
QUALITY=$(grep $INTERFACE /proc/net/wireless | awk '{ print int($3 * 100 / 70) }')
#------------------------------------------------------------------------
echo $QUALITY% # full text
echo $QUALITY% # short text
# color
if [[ $QUALITY -ge 80 ]]; then
echo "#00FF00"
elif [[ $QUALITY -lt 80 ]]; then
echo "#FFF600"
elif [[ $QUALITY -lt 60 ]]; then
echo "#FFAE00"
elif [[ $QUALITY -lt 40 ]]; then
echo "#FF0000"
fi