I want to get output of following small shell script in json form.
#!/bin/bash
top -b -d1 -n1 | grep Cpu
Output:
Cpu(s): 6.2%us, 1.6%sy, 0.2%ni, 90.9%id, 1.1%wa, 0.0%hi, 0.0%si, 0.0%st
Required Output:
{"Cpu": "6.3" }
How can I convert output of such every shell scripts in json form ?
You could try this
echo "{\"Cpu\":\"`top -b -d1 -n1 | grep Cpu | cut -f3 -d " " | cut -f1 -d %`\"}"
A brief description: First, take a look at man cut, especially -f and -d arguments. The \"s are simply double quotations, which should be preceded with a backslash to avoid misunderstanding by shell interpreter. And at last, anything enclosed in back quotation marks `` would be executed, as described here.
try this line:
your commands ...|awk 'BEGIN{FS="\\(s\\):\\s*";OFS="";q="\x22" }{$1=q$1q;sub(/%.*$/,"%",$2);$2=q$2q; print $1,$2}'
test with your data:
kent$ echo "Cpu(s): 6.2%us, 1.6%sy, 0.2%ni, 90.9%id, 1.1%wa, 0.0%hi, 0.0%si, 0.0%st"|awk 'BEGIN{FS="\\(s\\):\\s*";OFS="";q="\x22" }{$1=q$1q;sub(/%.*$/,"%",$2);$2=q$2q; print $1,$2}'
"Cpu""6.2%"
"Cpu""6.2%"? I suggest you add an expecting output for that line in your question, so that you could get the right answer to your question.