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Top Forums UNIX for Beginners Questions & Answers Printing df -h output in json format Post 303042684 by sravani25 on Friday 3rd of January 2020 10:27:07 AM
Old 01-03-2020
Printing df -h output in json format

Hi All,


i am trying to print the df -h ouput in json format. using below script.


Code:
#!/usr/bin/env bash

df -h > /tmp/sdf
nawk '{print " "$1" "$2" "$3" "$4" "$5" "$6" "}' /tmp/sdf > /tmp/sdf1


nawk 'NR==1 {    for (i=1; i<=NF; i++) {        f[$i] = i    }}{ print $(f["file_system"]), $(f["total"]), $(f["used"]), $(f["available"]),  $(f["used_percent"]), $(f["mounted"]) }' /tmp/sdf1 > /tmp/sdf2

nawk '{if(NR>1)print}' /tmp/sdf2 >/tmp/sdf3

nawk ' { printf "\"file_system\":\"" $1  "\",\"total\":\"" $2  "\",\"used\":\"" $3  "\",\"available\":\"" $4  "\",\"used_percent\":\"" $5  "\",\"mounted\":\"" $6  "\" ||"} ' /tmp/sdf3

but i am getting below error while executing the script



Code:
ERROR : 



nawk: run time error: not enough arguments passed to printf(""file_system":"udev","total":"16G","used":"12K","available":"16G","used_percent":"1%","mounted":"/dev" ||")
        FILENAME="/tmp/sdf3" FNR=1 NR=1
"file_system":"udev","total":"16G","used":"12K","available":"16G","used_percent":"1root@controller:/var/tmp#







Can someone please let me know what is wrong in the script.
Moderator's Comments:
Mod Comment
Please use code tags when posting data and code samples!

Last edited by vgersh99; 01-03-2020 at 11:41 AM.. Reason: code tags, please!
 

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json(n) 							       JSON								   json(n)

__________________________________________________________________________________________________________________________________________________

NAME
json - JSON parser SYNOPSIS
package require Tcl 8.4 package require json ?1.1? ::json::json2dict txt _________________________________________________________________ DESCRIPTION
The json package provides a simple Tcl-only library for parsing the JSON http://www.json.org/ data exchange format as specified in RFC 4627 http://www.ietf.org/rfc/rfc4627.txt. There is some ambiguity in parsing JSON because JSON has type information that is not maintained by the Tcl conversion. The json package returns data as a Tcl dict. Either the dict package or Tcl 8.5 is required for use. COMMANDS
::json::json2dict txt Parse JSON formatted text txt into a Tcl dict and return the value. EXAMPLES
An example of a JSON array converted to Tcl. A JSON array is returned as a single item with multiple elements. [ { "precision": "zip", "Latitude": 37.7668, "Longitude": -122.3959, "Address": "", "City": "SAN FRANCISCO", "State": "CA", "Zip": "94107", "Country": "US" }, { "precision": "zip", "Latitude": 37.371991, "Longitude": -122.026020, "Address": "", "City": "SUNNYVALE", "State": "CA", "Zip": "94085", "Country": "US" } ] => {Country US Latitude 37.7668 precision zip State CA City {SAN FRANCISCO} Address {} Zip 94107 Longitude -122.3959} {Country US Latitude 37.371991 precision zip State CA City SUNNYVALE Address {} Zip 94085 Longitude -122.026020} An example of a JSON object converted to Tcl. A JSON object is returned as a multi-element list (a dict). { "Image": { "Width": 800, "Height": 600, "Title": "View from 15th Floor", "Thumbnail": { "Url": "http://www.example.com/image/481989943", "Height": 125, "Width": "100" }, "IDs": [116, 943, 234, 38793] } } => Image {IDs {116 943 234 38793} Thumbnail {Width 100 Height 125 Url http://www.example.com/image/481989943} Width 800 Height 600 Title {View from 15th Floor}} BUGS, IDEAS, FEEDBACK This document, and the package it describes, will undoubtedly contain bugs and other problems. Please report such in the category json of the Tcllib SF Trackers [http://sourceforge.net/tracker/?group_id=12883]. Please also report any ideas for enhancements you may have for either package and/or documentation. KEYWORDS
data exchange, exchange format, javascript, json CATEGORY
CGI programming COPYRIGHT
Copyright (c) 2006 ActiveState Software Inc., 2009 Thomas Maeder, Glue Software Engineering AG json 1.1 json(n)
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