mjhjmtu

I have this output in the following and I am trying to convert it to JSON api format. I want to know how can I do it.

 rock64@rockpro64:~$ sh MACscript.sh 
 eth0
 11:1d:11:11:11:1d
 lo
 00:00:00:00:00:00

Do I have to use python script or can I do it using shell script?

This is my MACshell script:

 rock64@rockpro64:~$ cat MACscript.sh 
 !/bin/bash
 getmacifup.sh: Print active NICs MAC addresses
 D='/sys/class/net'
 for nic in $( ls $D )
 do
 echo $nic
 if grep -q unknown $D/$nic/operstate
 then
 echo -n ' '
 cat $D/$nic/address
 fi
 done

With plain bash you could do:

json=$(
 sh MACscript.sh | 
 pairs=()
 while read interface; read ether; do
 pairs+=(""$interface":"$ether"")
 done
 IFS=,
 echo "$pairs[*]"
 
)
echo "$json"

outputs

"eth0":"11:1d:11:11:11:1d","lo":"00:00:00:00:00:00"

you can use various ways to get your json values. bash, python,perl,.....

you can find useful posts about these in this website. however here is an example:

 arr1=($( ls /sys/class/net))
 arr2=($( cat /sys/class/net/*/address ))

 vars1=($arr1[@])
 vars2=($arr2[@])
 len=$#arr1[@]

 printf "n"
 printf "t"'"data"'":[n"

 for (( i=0; i<len; i+=1 ))
 do
 printf "t "'"#interface"'":"$vars1[i]",t"'"#address"'":"$vars2[i]" 
 "

 if [ $i -lt $((len-1)) ] ; then
 printf ",n"
 fi
 done
 printf "n"
 printf "t]n"
 printf "n"
 echo 

output:

 "data":[
 "#interface":"eth0", "#address":"00:50:56:a9:c0:81" ,
 "#interface":"lo", "#address":"00:00:00:00:00:00" 
 ]

and you can use this website to validate your json: https://codebeautify.org/online-json-editor