1#!/bin/sh -e 2# 3# wifi_quality: display wifi signal quality 4# 5# Copyright (C) 2008 Canonical Ltd. 6# Copyright (C) 2011-2014 Dustin Kirkland 7# 8# Authors: Dustin Kirkland <kirkland@byobu.org> 9# 10# This program is free software: you can redistribute it and/or modify 11# it under the terms of the GNU General Public License as published by 12# the Free Software Foundation, version 3 of the License. 13# 14# This program is distributed in the hope that it will be useful, 15# but WITHOUT ANY WARRANTY; without even the implied warranty of 16# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17# GNU General Public License for more details. 18# 19# You should have received a copy of the GNU General Public License 20# along with this program. If not, see <http://www.gnu.org/licenses/>. 21 22___get_dev_list() { 23 if [ -n "$MONITORED_NETWORK" ]; then 24 echo "$MONITORED_NETWORK" 25 else 26 iw dev | grep Interface | cut -f2 -d\ 27 fi 28} 29 30__wifi_quality_detail() { 31 if eval $BYOBU_TEST iw >/dev/null 2>&1; then 32 local dev 33 for dev in $(___get_dev_list); do 34 iw dev "$dev" info 35 iw dev "$dev" link 36 echo 37 done 38 elif eval $BYOBU_TEST iwconfig >/dev/null 2>&1; then 39 iwconfig 2>/dev/null 40 fi 41} 42 43__wifi_quality() { 44 local out bitrate quality 45 if eval $BYOBU_TEST iwconfig >/dev/null 2>&1; then 46 # iwconfig is expected to output lines like: 47 # Bit Rate=54 Mb/s Tx-Power=15 dBm 48 # Link Quality=60/70 Signal level=-50 dBm 49 # the awk below tokenizes the output and prints shell evalable results 50 out=`iwconfig $MONITORED_NETWORK 2>/dev/null | 51 awk '$0 ~ /[ ]*Link Quality./ { 52 sub(/.*=/,"",$2); split($2,a,"/"); 53 printf "quality=%.0f\n", 100*a[1]/a[2] }; 54 $0 ~ /[ ]*Bit Rate/ { sub(/.*[:=]/,"",$2); printf("bitrate=%s\n", $2); } 55 '` 56 eval "$out" 57 elif eval $BYOBU_TEST iw >/dev/null 2>&1; then 58 local dev 59 for dev in $(___get_dev_list); do 60 # iw is expected to output lines like: 61 # signal: -50 dBm 62 # rx bitrate: 216.0 MBit/s MCS 13 40MHz 63 # signal to quality: https://superuser.com/a/1360447 64 out=`iw dev "$dev" link 2>/dev/null | 65 awk '$0 ~ /^\s*signal:/ { a = 100 * ($2 + 110) / 70; 66 printf "quality=%.0f\n", (a > 100) ? 100 : ((a < 0) ? 0 : a); } 67 $0 ~ /^\s*rx bitrate:/ { printf "bitrate=%s\n", $3; } 68 '` 69 eval "$out" 70 [ -z "$bitrate" ] || [ -z "$quality" ] || break 71 done 72 fi 73 [ -n "$bitrate" ] || bitrate=0 74 [ -n "$quality" ] || quality=0 75 if [ "$bitrate" -gt 0 ] && [ "$quality" -gt 0 ]; then 76 printf "${ICON_WIFI}"; color b C k; printf "%s" "$bitrate"; color -; color C k; printf "%s" "$ICON_MBPS"; color -; color b C k; printf "%s" "$quality"; color -; color C k; printf "%s" "$PCT"; color -- 77 else 78 rm -f "$BYOBU_RUN_DIR/status.$BYOBU_BACKEND/wifi_quality"* 79 fi 80} 81 82# vi: syntax=sh ts=4 noexpandtab 83