CODEWITHSUNDEEP
linuxshelldictionarysh
Nisha
Nisha

Reputation: 389

Dictionary in Shell Script

I am developing service manager in centos8 and I have this code to get services:

i=0
while [ $i -lt $service_count ]; 
do
    service_name=`cat $service_conf_file | get_json_value "['service_groups'][$i]['service']" | sed 's/"//g'`
    status_reader $service_name
    if [ $service_disabled -eq 1 ]; then 
        current_status=disabled
    fi
    
    echo "{'${service_name}' : '${current_status}'}"
    
    
    i=$(( i + 1 ))
   
done

But this code returns:

{'apache_server' : 'running'}
{'apache_server_2' : 'running'}

I want it in dictionary like below, which I can access later by service name using Python.

{"apache_server" : "running" , "apache_server_2" : "running"}

How to do it ?

Upvotes: 2

Views: 1331

Answers (1)

Roberto Manfreda
Roberto Manfreda

Reputation: 2623

I tried using the following script:

#!/usr/bin/env sh

printf "{"

i=0
j=100
target=10

while [ $i -lt $target ]; do

    printf "\"$i\" : \"$j\""

    if [ $i -lt $(( $target - 1 )) ]; then
            printf ", "
    fi

    i=$(( i + 1 ))
    j=$(( j + 1 ))
done

printf "}\n"

which produces this kind of output:
{"0" : "100", "1" : "101", "2" : "102", "3" : "103", "4" : "104", "5" : "105", "6" : "106", "7" : "107", "8" : "108", "9" : "109"}

So in your case something like this should be ok:

#!/usr/bin/env sh

printf "{"

i=0

while [ $i -lt $service_count ]; do
    service_name=`cat $service_conf_file | get_json_value "['service_groups'][$i]['service']" | sed 's/"//g'`

    status_reader $service_name

    if [ $service_disabled -eq 1 ]; then
        current_status=disabled
    fi

    printf "\"$service_name\" : \"$current_status\""
    
    if [ $i -lt $(( $service_count - 1 )) ]; then
            printf ", "
    fi

    i=$(( i + 1 ))
done

printf "}\n"

As suggested in the comment the trick here's using printf that doesn't automatically place the newline "\n" at the end of the string.
You could use echo too but specifying the -e option.
Anyway not every systems supports that option so simply use printf, just to be sure.

As another note:
Looking at the desired output it seems you want a json payload, if you are able to use BASH over simple sh you can think about putting stuff into an array then converting it through some tool like jq in order to prevent and manage syntactic errors.

Upvotes: 1

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