Обернуть выхлоп в текст

# blkid | grep sd | cut -c 1-8 | uniq
/dev/sda
/dev/sdc
/dev/sdd
/dev/sdb

{
	"data":[
		{"{#HARDDISK}":"/dev/sda"},
		{"{#HARDDISK}":"/dev/sdc"},
		{"{#HARDDISK}":"/dev/sdd"},
		{"{#HARDDISK}":"/dev/sdb"}
               ]
}

#!/bin/bash

echo "{\"data\":["
array=( `blkid | grep sd | cut -c 1-8 | uniq` )
printf {\"{#HARDDISK}\":\""%s\"},\n" "${array[@]}"
echo "]}"

{"data":[
{"{#HARDDISK}":"/dev/sda"},
{"{#HARDDISK}":"/dev/sdc"},
{"{#HARDDISK}":"/dev/sdd"},
{"{#HARDDISK}":"/dev/sde"},
{"{#HARDDISK}":"/dev/sdf"},
{"{#HARDDISK}":"/dev/sdb"},
{"{#HARDDISK}":"/dev/sdg"},
]}