bash - Output result of cli command to a file using awk to get columns -

bash - Output result of cli command to a file using awk to get columns -

i want record rssi @ point distance point router. distance user input , output file name user type like:

sh rssi.sh output.csv 20

where output.csv csv want append results , 20 distance

at moment rssi.sh looks like:

#!/bin/bash rssi_csv=$1 distance=$2 rssi=$(iwconfig wlan0 | awk -f'[ =]+' '/signal level/ {print $7}\') awk '{print $distance, $rssi}' > $rssi_csv

this creates rssi_csv per user input doesn't print required values in , i'm not sure why.

i imagine it's

awk '{print $distance, $rssi}' > $rssi_csv

that isn't working echo rssi or echo distance both output values screen. i'm using awk want have columns can output csv file, perhaps though there improve way?

there couple of issues awk need pass variables using -v alternative , utilize begin block no input given. note single > not append overwrite file. appending need >>:

awk -vd=$distance -vr=$rssi 'begin{print d,r}' >> $rssi_csv

demo:

$ distance=20 $ rssi=$(iwconfig wlan0 | awk -f'[ =]+' '/signal level/ {print $7}') $ awk -vd=$distance -vr=$rssi 'begin{print d,r}' 20 -47

note: believe want comma separated values so:

$ awk -vd=$distance -vr=$rssi 'begin{print d","r}' 20,-47

however awk overkill printing variables utilize old echo:

$ echo "$distance,$rssi" 20,-47

bash awk sh