Small logic change. Added extra check and error handling.

examples/linux/disk_info.yaml

@@ -0,0 +1,13 @@
+---
+name: Use DF to get drive information in JSON.
+groups: Placeholder
+target_os: "Linux"
+tasks:
+  - name: Get disk-info with df returning JSON.
+    command: >
+      df -Th -x overlay -x tmpfs -x devtmpfs | \
+      awk 'NR==1 || $1 ~ ".+"{print $3, $4, $5, $7, $2}' | \
+      awk 'NR>1 {printf "{\"size\":\"%s\",\"used\":\"%s\",\"available\":\"%s\",\"mount_point\":\"%s\",\"type\":\"%s\"},", $1, $2, $3, $4, $5}' | \
+      sed '$ s/,$//' | \
+      awk 'BEGIN {printf "["} {printf "%s", $0} END {printf "]"}' 
+      exit