Bash read json into variable. json` and outputs its content in a formatted way.

• Bash read json into variable Or does it only work with files or pipes and using process substitution is the workaround in this case? Well, it works with files or standard input; pipes is a way of using standard input and process substitution is a way of As Benjamin already suggested, only retrieving the json is a better way to go. Handling Nested Objects with ‘jq’ I am trying to read the json file and store the keys as bash variable and the values as variable value. pwr_config=`echo "console. The value from the secret manager is a JSON which Powershell can natively convert into a type of array that you can reference. While this is alright most of the times, it can be a problem if you're using set -e (but you really shouldn't use set -e anyway). Tags: bash; linux; til; Building a Frequently when working with data structures such as JSON, we might want to transform one data structure into another. * regex will update the file and particular key having any value and using \"\" will only look for empty string and update the value. json | xargs -0 printf '%q\n'` npm run start This pipes a short node. Category: tech. – Stéphane Chazelas Commented Jan 21, 2021 at 17:13 | Show 3 more comments 5 Use jq to produce a shell statement that you Assign JSON object in variable In several ways, we can assign JSON object with variable. And of course, use the backticks (`) operator. json: { "Day":'0', "num":'85', "Qtr&quo As the example shows, the json_pp tool that comes with the JSON::PP Perl core module can prettify and validate a JSON object. The -r option for the jq command is used to output the names as raw strings, without quotation marks. */' file 579289cc0 5792892323 57923320 How to parse JSON with keys from a BASH variable using jq? Ask Question Asked 3 years, 10 months ago. Then you can call the exactly object with simple leverage dot notation( . I needed it to pass a list of files to a linter inside of a github action. 677974959667,13594. How to parse JSON with keys from a BASH variable using jq? 2. Handling Nested Objects with ‘jq’ Please note, this process is destructive (it uses sed's in-place editing). I want to parse all the bitRateFiveMinutes values, add them up, Getting the result into a shell variable is then a matter of running the pipeline in a command substitution and assigning it to a variable: How to read bash variables into json. Read JSON arrays into a Bash array 0 Sed values from JSON Array 1 Parsing JSON to array using jq - bash Hot Network Questions Teaching tensor products in a 2nd linear algebra course What is the correct way Did a peaceful This script first defines the JSON data in a variable named json and uses the jq command to extract the number of people and the names of all people. Saving cURL -w variables to a bash variable And you want all properties turned into variables or just warnings and auth? Even if they are called PATH, potentially wreaking havoc? How trusted is the data? How to parse JSON with keys from a BASH variable using jq? 1. json | jq -s However, when I try to save the result to a variable, it The US Naval Observatory has an API that outputs a JSON file containing the sunrise and sunset times, among other things, as documented here. json in create-login-profile. I just need to retrieve the value, store in a variable and send to another That’s tough to read and even tougher to write. In this example, we’ll use some Wikipedia JSON that describes a list of page entries: You could also pipe into the read command, but then you'd have to use the variables within a subshell: Bash awk: parsing variable string into another variable? 21. This solution is based on a really cool command called jq. Hot Network Questions The problem is that previous_year etc are all bash variables, not jq variables; you need to copy them into jq variables with --arg. Can someone help, please? props=cat test. I convert it back into a secure string under the assumption its a secret and you want to pass it in. Mind also using the additional -t option to get just the tuple value. Export environment variables to JSON in Bash. Modified 3 years ago. ) BTW, cat foo | anything is pretty much always better replaced with anything <foo or, when the program supports it, anything foo. txt will give the desired JSON object. return specific items in Bash variable substitution with json string as variable within larger json object. For now you can do, perl -lne 'print "$1" if /. Parsing JSON to array using jq - bash. If you wish to remove them also, I suggest using substring. Lets assume that you have JSON data from arrays in files like array1. The code used is. But isn't a way to use variables defined in the script rather then using arg passed variables? – Daniel Ferreira Castro Next, once you're getting jq to emit newline-separated content, you don't need to read it into an array at all: You can iterate over the content as it's written from jq and read into your shell, thus preventing the shell from needing to I am running a bash script (test. . ' This command reads `file. As you dive deeper into JSON parsing in Bash, you’ll come across more complex JSON structures, such as nested objects and arrays. Is there a reliable way to store a short bit of JSON in a bash variable for use in a AWS CLI command running from the same script? I'll be running a job from Jenkins that's updating an AWS Route53 record, which requires UPSERTing a JSON file with the change in records. readFileSync(process. The benefit of using jq is that it ensures that all data is properly formatted and escaped, preventing problems such as incorrect JSON structure or special character issues: I receive some json that I process until it becomes just text lines. Here how I was hoping to do that: search_command="'. The way for any program called by bash to "receive" the contents of an array would be to express it as a string, with field separators. log(JSON. (Note that the OUTDIR variable appears to be expanded in the value of JSON, and the quotes around "port" and "size" are inexplicably absent. 20 And so on. I'm trying to extract the values of only the keys which are provided in a BASH variable. jq is not a program for generating JSON, but a tool for querying it. Here is another way to insert data from a file into a JSON property. txt. Ask Question Asked 2 years ago. Using the -X option is also recommended, as sometimes a . Bash script: Use string variable in curl JSON Post data 3 Passing a shell variable to a JSON request to curl? 0 Bash JSON: Add Var 2 How do you POST an entire json string from a bash variable with curl? 1 Parsing variables in 3 use -e option will not modify the file instead it will print the output in terminal. Avoids # needing a subshell or command substitution. 1 min read, 146 words. You're welcome, I've just turned that comment into an answer – Aaron. The input is then available for regular jq stream processing, so: jq -sR '{"value", . Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand OverflowAI GenAI features for Teams I have a variable which contains a space-delimited string: line="1 1. This is, alas, a bit inefficient (since it means rereading the file from the top for each record to extract). Either of these gives anything a direct file handle on foo, so it can seek around, read out-of-order, etc; this lets sort split into different threads to read and sort different parts of the file in parallel, or tail jump straight to the end, etc. You have to pipe to 4 different utilities just to get to a property in the JSON response body! Bash doesn’t understand JSON out of the box, and using the typical text manipulation tools. Parsing a config file in bash. I've taken the approach to feed the curl call into a bash variable before using the variable in the above code. Though this is a hacky way to achieve the use-case, recommend using jq to fix your broken json string and extract those identifiers. See "Passing bash variable to jq" on stackoverflow . Here's an example: Output: In this example, we use the cat In several ways, we can assign JSON object with variable. For instance here is my test. awk can do all the work of tr and grep and sed, and cat is never needed when reading only a single file (its job is to concatenate multiple files into a single stream). This is my json The json document has a key called access_token and I need to How can I loop through each element in the json file in Bash which has as "Generated" value "@logon"? I guess I should use jq, but I didn't manage to find the right filter. "; another example shown here – Nate Anderson Commented Dec 28, 2022 at 14:02 @AndreyRegentov - probably not. It would be better (more robust) to use a JSON-aware tool to create the JSON document and to insert the wanted values. net. args[0] file1. Let's suppose your template is in the file template. Json Object Parsing using mysql # Your command with output (this is of course longer than this) grep -v '\$' # Exclude the header while read line; do # Start a while-loop echo "${line}" # Echo the contents of the current line that we've read to the next command # Regular expression to filter the number and the IP and add these to the command, they are held by the Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Since your config file is a valid shell script, you can source it into your current shell: using awk in bash script with variables to parse. In this tutorial, we’ll delve into many ways to parse, v So I suggest you use jq to get the string you need to manipulate into a variable, for example: my_var=$(jq -r . folder' test. file. E. 3. Let me know if you run into any issues with the code I provided. sh). 2. Using JQ to parse JSON string with multi-word values into an associative array. Using jq to compose the JSON document from a simple template: Here we learn how to read JSON file in Bash scripting. There's another way using subprocess that does not depend on setting the environment. psqlrc file might add some redundant output, as well as the -A option, which disables column aligning (whitespaces). What makes this a viable alternative in terms of performance is that no external utilities are called in each loop iteration; however, for larger input files, a solution based on external utilities will be much faster. json` and outputs its content in a formatted way. Stack Overflow. curl with json array. # Reads stdin into a variable, accounting for trailing newlines. Hot Network Questions "We take these items to be " VS "These items we take to be " In a nutshell: map_values is your friend. 3 (and to a greater extent 4. defines[] | select(. But, am bit confused how can I extract such informaion. I want to parse the file and read the data from it using shell scripting. So I think there is something off about the piping that I am doing. In Luke 1:35, does the Power of God overshadowing Mary describe the Incarnation—the Son of God transferring into Mary to become the Son of Man? Curl can post binary data from a file so I have been using process substitution and taking advantage of file descriptors whenever I need to post something nasty with curl and still want access to the vars in the current shell. How to read bash variables into json. This command executes just fine: jq '. I would recommend I think I just saw a hookah-smoking caterpillar and a grinning cat. json. args[0]. This can be useful while working with large JSON structures when we are only interested in several properties or values. cat foo | bar gives bar only a FIFO, whereas bar <foo gives it a real file handle for its stdin; that's an especially big deal when bar is something that can benefit from being able to seek() around in its input Download and install jq which is like sed for JSON data. See man bash and search for "here document" for more information. Poshi's solution is solid. Thu 24 th February, 2022 2022-02-24T22:40:50-08:00 by Duncan Lock. How to read json attributes values to shell script without jq. txt)&quot; &gt; newdata. import json import sys from pprint import pprint jdata = open(sys. I'm trying to pass in a list of user and there roles so that I can assign roles to users using powershell. Commented Sep 6, 2018 at 13:55. [$quer]. Essentially if I gave an argument of commercial I'd like it to return: commercial-team@domain. I have tried iterating over the first JSON-file, but when I do so in the following way, I get random parsing errors (with the real JSON-file I am working with). You can pipe the output of any command into jq, allowing for seamless integration into your Bash workflows. The Python script takes one of its parameters in the form of a JSON string, which looks like this: '[{"CONFIG":"SomeConfigID"}]' //there are other members available I am trying to read json file and get a single object out of it, by reading that object into bash script variable. json to be a separate file, the easy thing to do is to define your entire template as a jq expression: var1="red" var2="european. 0. Using jq as a template engine If you don't really need input. 948696618436826,6907. This skill enhances your ability to manipulate data dynamically and perform various automated tasks efficiently. I have a command in a bash pipeline that returns me a JSON like the follow: $ aws iot get-registration-code { "registrationCode": "abcd635" } I would to have the value abcd635 I've got a JSON array like so: { "SITE_DATA": { "URL": "example. The issue I'm running Strictly speaking, the quotes are only necessary to work around various bugs in here-string handling in earlier versions of bash. You need a program that is capable of properly parsing JSON-formatted data. 2. With I am trying to use bash to create a string variable that will be used in jq to add new elements to the json file. Using --arg to create internal string variables from I have a text file with some information and I stored the contents of that file in a bash variable. If you care about the json file you're reading from you should make a copy of it first. For example, to simply display the contents of a JSON file, you can use: cat file. home & garden personal politics tech til Templating JSON data into a Variable, in Bash. flowers" var3="european_vegetables I need to pull a couple of fields and assign the values to variables that I can continue to use in my bash script. json to read in the folder value, and then pipe the output using the -s flag to get it enclosed in an array. To parse all input lines at once, use option -s, --slurp. At some point I need to run this command (aws iot get-registration-code) and I receive back the answer in JSON (Not a file). tool’ can handle these structures, but the approach might differ slightly. I am trying to read json file and get a single object out of it, by reading that object into bash script Then where is variable loading into bash for his rest executable code? I see only one workaround. copy and paste this URL into your RSS reader. something like . This is where jq comes [] I have a bunch of different kinds of files I need to look at periodically, and what they have in common is that the lines have a bunch of key=value type strings. duncan­lock­. I have a Bash script which gets data in JSON, I want to be able to convert the JSON into an accessible structure - array / list / or other model which would be easy to parse the nested data. output environment variables as key-value pairs in a JSON object. Parse JSON data into a variable assignment format. load(sys. Iterate over JSON data for each specific key. Extract JSON value to shell variable using jq. json) This gets you a variable containing To read JSON data from a file, we can use the cat command along with jq to parse and process the JSON content. – Gordon Davisson Parsing Complex JSON Structures in Bash. It was created to fill the void of ability to parse JSON with bash scripts. Remember to replace '' with your actual curl arguments How do I insert a bash variable into the JSON body of a cURL request? Hot Network Questions What is the meaning behind stress distribution in a material, physically? The shell itself can't store complicated Data Structures, but like most of the time in shell, you can use external tools, I demonstrate here 6 different solutions, all in Unix* like shells: First, your JSON is broken, this is a valid version in file. What I want is to dynamically create a JSON file named tools. How to use jq to convert this string to JSON? 4. 8. stdin);print(JSON["cities"][0]["name"]);print(JSON["otherinfo"]["nickname"]);' < data. json is the json following content : Note that injecting the values of shell variables into JSON documents may result in broken JSON strings due to the lack of encoding special values. json, array2. -i option will modify the file. Add bash variable as JSON key and value into object. com", "AUTHOR": "John Doe", "CREATED": "10/22/2017" } } I'm looking to iterate over this array using jq so I can Or, use a JSON-processing tool to handle any edge cases with the values of the variables: JSON=$( jq -n -c --arg a "$ABC" --arg b "$DFG" '[{ Address: $a, Backup: false, The command instantiates three internal jq string variables with values taken from the shell variables that you have previously created. One line is read from the standard input, or from the file descriptor fd supplied as an argument to the -u option, split into words as described above in Word Splitting, and the first word is assigned to the first name, the second word to I'm trying to take the contents of a config file (JSON format), strip out extraneous new lines and spaces to be concise and then assign it to an environment variable before starting my application. js app into the node runtime taking an argument of the file name and it parses and stringifies the JSON file to Use jq to parse json into environment variable format. However, if you're looking for the most compact to do this, no need to save the response as a variable if the only thing your're Step 2: Update JSON Values with jq Now when we know how to read property values from JSON file, we can now update it. To automate the process of updating JSON values, we can use the jq command with the --arg or --argjson options to update fields dynamically. An example for how to get the volume IDs from your sample data: Bash JSON string into variable. using . The above code works using the following sample data, which has been 'butchered' to make is as How to Parse JSON Data Using Shell Script on Linux Using the jq Command? To parse JSON data using a shell script on Linux is explained in these steps: Step 1: Create a JSON File. Below is an example which prepares request JSON data, used to create a CoreOS droplet on Digital Ocean: Parsing JSON output to variable in bash using jq filters. var=304000,0,8. Bash: convert lower level JSON to escaped string. Using shell script to pull strings out of a config file. Here is an example of the output JSON file: { "error" Read a json file with bash 13 How to read and parse the json file and add it into the shell script variable? 4 Read JSON file & parse to get element values in shell script 0 Parse JSON Data using Shell Scripting 0 Using bash 1 2 1 Conclusion Bash parsing JSON is a valuable skill for any developer or system administrator aiming to work efficiently with data-driven applications and APIs. One of the reasons for its adoption is the ease with which a human can process it visually. com If the commands inside the loop also read from standard input, the file descriptor used by read can be chanced to something else (avoid the standard file descriptors), e. Bash array to JSON array. Bash Parse Arrays From Config File. I need, using bash script, create json file with some variables within. I am trying to read json file and get a single object out of it, by reading that object into bash script variable. 7931875,7. The JSON data file is created under the name I am trying to read the value of a field of a json variable, the field name is stored in a variable as well. If jq is reading the environment, then a variable must be EXPORTed (in bash) to be visible, and requests to export arrays are silently ignored. argv[1]) data I am appending data to a file and then use echo &quot;$(tail -n10 newdata. Convert environment variables into a json file. Practicing these I want to convert JSON string into an array in bash. 4. Example map. json and to populate that file with the content from tools. Then the following script will perform the specified transformation: #!/bin/bash # As far as this example is concerned, # there is no need to export any variables AWS_DEFAULT_REGION=us-east-2 AWS_ACCOUNT_ID=123456789012 . 8 go:1. Retrieving value from JSON object in bash using JQ. However, processing raw JSON in bash and other Unix shells can be challenging without the right tools. putting ruby outout into temporary_file, that should conain lines: variable='value' , and after that load it into bash by '. json { " So, your question is not about jq output and bash arrays, but how to pass a bash variable to a jq command, Read JSON arrays into a Bash array. Example: You can read the contents of a file into a variable in bash using the command substitution syntax like this: variable=$(<filename. Through the use of tools like jq and effective scripting practices You can use following python script to parse that data. 4) appears to have resolved those problems, allowing the here string to JSON (JavaScript Object Notation) has become the ubiquitous data format across web APIs, configuration files, and data pipelines. id==$ Skip to main content. File output into an array using bash. Hot Network Questions Is online job converting crypto to cash a scam? Time Travel. One line is read from the standard input, or from the file descriptor fd supplied as an argument to the -u option, split into words as described above in Word Splitting, and the first word is assigned to the first name, the second word to the second name, and so on. So something like: Version=2 Len=17 yes, when you assign to an array, bash has to escape all its special characters and then split the arguments with the default separator, which is space. That works fine, but I am trying to see python can just load in the variables already in the bash script. }' newdata. 1. The input_file variable contains the name of our JSON file and The easiest way to do this is with two instances of jq-- one listing hostnames, and another (inside the loop) extracting individual entries. json | jq '. Variables in Bash don’t require a declaration of type; instead, they are created when Convert a bash variable to JSON array and JSON object using jq. Here's a snippet of json I am working with: { &quot;episodes&quot;: You can use the @tsv operator in jq to emit tab-separated output, which a bash while read loop can easily parse as input. js: How about this, it will read each line to a variable and that can be used subsequently ! say myscript output is redirected to a file called myscript_output awk '{while ( (getline var < "myscript_output") >0){print var;} close ("myscript With this, read returns a failure return code (1) since the null-byte delimiter is not read before EOF. For this purposes, I have a bash file, who creates json template file using cat: cat &lt;&lt;'EOF' &gt; template. stringify(JSON. The code above should work for you. but this is workaround, not resolution. txt file looks like this: docker:19. The JSON string is passed to the bash script as an argument (it doesn't exist in a file). 6k 16 16 gold badges 57 57 silver badges I have a process running in bash. json:- [ { "serviceName": "CreateAssociationService", " jq '. We will use jq, a powerful command-line utility specifically designed for working with JSON data in Bash. I know I can easily assign the output to one variable through bash with variable="$(command)" but I need the output to I have a bash array X=("hello world" "goodnight moon") That I want to turn into a json array ["hello world", "goodnight moon"] Is there a good way for me to turn this into a json array of strings So, your question is not about jq output and bash arrays, but how to pass a bash variable to a jq command, which is well documented around SO, So, I am trying to run a Python script from within a Bash script. Assuming your input JSON is in the variable s: declare -A X=( ) while IFS=$'\t' read -r color id; do X eval: I have a JSON where I am storing it in a variable in my Bash script like this: RAW_JSON="{"secretKey": "ADFGHJKGBNJK"}" I wanted to store the value of secretKey in another variable called secretValue . my idea is to put json string into variable JSON, i have a command whom takes a console login to user in AWS IAM, the comand is : aws iam create-login-profile --cli-input-json file://create-login-profile. 03. json bash jq Share Improve this question asked Jul 11 846 I wanted to fetch all the hostname values that starts with "abacus-ap-hf-test" and without ":8080" into a variable and then wanted to use those values for further commands over a for loop something like below. I'm trying to avoid curling more than once to get the variables I need from the json using JQ. I tried this with one key in the variable and it works. A Command-line tool and bash library that creates JSON - h4l/json. : while IFS= read -r -u3 line; do echo "Text read from file Read a json file with bash 13 How to read and parse the json file and add it into the shell script variable? 4 Read JSON file & parse to get element values in shell script 0 how to get a value from a json key value pair in linux shell 2 Note that bash's readarray now supports readarray -td '' to read NUL-delimited data into an array. There's no matter of quoting of arguments or spaces per se in the In conclusion, mastering how to bash read file into variable is vital for effective Bash scripting. Using jq to compose the JSON document from a simple template: Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Parsing Complex JSON Structures in Bash. yaml --- a: "2" b: "3" api_key: "somekey: Update Here's a robust solution using yq, which would be simpler if the builtin @tsv filter implemented the lossless TSV escaping rules instead of the CSV ones. So if you want it to print an object with an array See "Passing bash variable to jq" on stackoverflow. argv[2], 'utf-8'))));" | node - config. But it's escaping my double quote. temporary_file'. txt file. I am expe In the original question, update_list is a comma-separated listing of quoted strings, and the following solution would work if these strings are also JSON strings: Put the -c option just before its argument - the query. KL john That assumes your JSON data is in a file called data. Ask Question Asked 3 years ago. 18 kubernetes:1. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand Cannot I am writing a bash script which has a json value stored in a variable now i want to extract the values in that json using Jq. Here we learn how to read JSON file in Bash scripting. Using perl regEx syntax, it can be done as below. The JavaScript Object Notation (JSON)format standard has been around since 2013. *\"_id\" : \"([[:alnum:]]+)\". #!/usr/bin/env bash declare -a values # declare the array # Read each line and use regex parsing (with Bash's It uses jq's --compact-output (or -c) flag to print each iteration result on its own single line, then uses the shell's read function in a while loop to linewise read the results into a shell variable. P1M. In the first line there's a value that I would like to keep in a variable and all the rest after the first line should be displayed with less or other utils. com commercial-updates@domain. json` $ echo Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand OverflowAI GenAI features for Teams Have a json file I am trying to parse from podfox to allow me to rename the downloaded files in a &quot;friendly&quot; way. Looping through a json file and retrieving the values into bash variables. txt; to keep only 10 lines in the newdata. json Sample Output. json works to get the json file into a variable. bash Skip to content Navigation Menu Toggle navigation Sign in Product GitHub Copilot Write better code with AI Security Find and fix Actions Codespaces Issues I have the following json file: { &quot;data&quot;: { &quot;allPost&quot;: { &quot;edges&quot;: [ { &quot;node&quot;: { &quot;slug&quot;: &quot;fp-ch The following may not be exactly what you're after but does show how you can avoid calling jq more than once, and how the command can partly be constructed by jq. Both ‘jq’ and ‘json. Python JSON Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Note that injecting the values of shell variables into JSON documents may result in broken JSON strings due to the lack of encoding special values. To make that even easier, there are a number of ways to prettify and structure JSON output. 50 string" I want to split that string with space as a delimiter and store the result in an array, so that the following: echo ${arr[0]} echo ${arr[1]} echo ${arr[2]} But then I don't know how to make it into 77 and then put it back to the parameter of X_serial. How to parse JSON with keys from a BASH variable using jq? 0. the general structure of calling a function that receives the HEREDOC could also be implemented. json_val={"code":"lyz1To6ZTWClDHSiaeXyxg","redirec The fact that Bash variables use curly braces doesn't mean they are JSON. – Gordon Davisson Commented Jan 6, 2023 at 3:32 I see. x+) solution:. I want a json file to contain this information and have the following: [ { "name":" I'm trying to find a short and robust way to put my IP address into a bash variable and was curious if there was an easier way to do this. g. This is how I am currently doing it: This is how I am currently doing it: jq is doing exactly what you tell it to do. Young Girl meets her older self - Who doesn't like her How to template out JSON in Bash. # Note that NUL bytes are still unsupported, as Bash variables don't allow NULs. g we have employee json data, in which “empId” is dynamic by using in built RANDOM variable. 0 Your help is very much appreciated. The JSON module is a standard part of Python3, so if you don't want to install jq, you could maybe use Python: python3 -c 'import json,sys;JSON=json. – My approach now uses read along with the printf builtin's -v flag in order to read the contents of stdin directly into a variable. The json document has a key called access_token and I need to extract the value of this field. Is there a way of achieving it without using some temp Yes indeed it can be done. If you I am trying to read the value of a field of a json variable, the field name is stored in a variable as well. parse json and put in array. tools=$(cat tools. id==$ If you need to print variables, use the cat << EOF construct, which utilizes the Here Document redirection built into Bash. what I want is to be prompted w/ the name, and that tells me what ID (into a variable) that I need to use. sh) and it loads in environment variables (from env. In other words, assuming the templates for --key-condition-expression and --expression-attribute-values are fixed, you should be able to adapt the following to your needs: I'm trying to write a bash script with make s curl call and get a json document back. txt) My tools. See below for "wrong output" produced. pick your poison: 1) foo 2) bar #? If I select 1, then id 123 would go into variable X, else if I select 2 then id 456 would go into variable X I have a JSON file which is an array of Object. Expand variable in the JSON payload of a curl command. Can I do You can declare array in bash scripts with declare -a <array_name>=(value1 value2 value 3) Then you can use them like this echo ${<array_name>[index]} Edit: Ok, to construct arrays from config file. What you are doing with the -n switch is just using it as a pretty printer. Its flexibility and universality makes JSON an ideal transport for structured data of all types. Alternatively, JSON::XS is a cpan module with the same functionality and provides the json_xs tool. This is where I've got so Bash JSON string into variable 0 How to read bash variables into json 1 Pass JSON string as an input to aws command 1 How to use an environment variable in an AWS CLI command 4 Store AWS CLI result to bash variable 0 2 EDIT: I've updated the question as the answers so far are correct but unfortunately I oversimplified the problem to the point that it will likely need a new question entirely. json bash jq Share Improve this question Follow edited Oct 22, 2022 at 7:54 oguz ismail 50. How to create an array in shell script for the following json output? 0. 6. json and so on. You can use it to slice and filter and map and transform structured data with the same ease that sed, awk, grep does for unstructured data. And p\K is perl-regexp flavor for a variable-length lookbehind, "\K tells the engine to pretend that the match attempt started at this position. Use jq to parse json into environment variable format 7 How to extract value from json contained in a variable using jq in bash 1 Extracting values from JSON using bash 1 How to parse JSON with keys from a BASH variable using Get-Content would read the JSON file into an array of strings, and ConvertFrom-Json convert these strings into the PSCustomObject object. Also, it does not trim off the quotation marks around the value. Using the “jq” Command with Command Substitution The jq command is a command line-based JSON data processor that is capable of extracting the elements from a JSON array and can be converted into a Bash array What am I doing wrong? and how to actually use the JSON string as input to a function in bash? Much appreciated json bash function grep Share Improve this question Follow asked Aug 31, 2022 at 11:29 Sami 341 1 1 gold badge I want to read this file into a variable in shell script & then extract the values of install_home,user & tmp_dir using expr. Bash: Read into multiple local scope variables How to store json key value pair in and store it in one variable in linux-1. txt) Understanding Bash Variables What is a Bash Variable? A Bash variable is essentially a storage location that holds a value. This should convert a json array to a bash array regardless of the contents of the json entries. I want to read this file and store all of its About the OP solution: You do not need an eval to assign a variable if you allow some constant variable to be used. What I tried: $ jsonVar=`cat test-config. Now how can I Here we use jq, a powerful command-line JSON processor, to make the conversion of Bash variables to a JSON string much more robust. Questions; Help; Chat I need stats pertaining to the block of description "reads 95%" arrange in below format and assign to a string variable using a BASH script. Using bash I'd really appreciate if someone can show me how to store the response as another var and then use this to variablize name I've got a JSON file (see below) called department_groups. jq can parse lines of arbitrary input into a stream of JSON strings using option -R, --raw-input. I wanted to fetch all the hostname values that starts with "abacus-ap-hf-test" and without ":8080" into a variable and then wanted to use those values for further commands over a for loop something like below. (1) I don’t see any way that the commands presented in the question could have produced the output presented in the question. But, am bit confused I want to read into bash associative array the content of one yaml file, which is a simple key value mapping. parse(require('fs'). Exampl Finally, here's a pure Bash (3. uyse fmxpk fonaor kolabrn hzbot rrkv zqprzz ahqfr rfox cvnu