Add file systems

bin/malpd

@@ -63,6 +63,41 @@ def read_smart(name)
   result
 end
 
+def read_filesystems
+  out = `findmnt -J -b -o SOURCE,TARGET,FSTYPE,SIZE,USED 2>/dev/null`
+  return [] if out.empty?
+  data = JSON.parse(out) rescue nil
+  return [] unless data
+
+  skip_fstypes = %w[tmpfs devtmpfs efivarfs]
+  result = []
+  seen = {}
+  stack = Array(data["filesystems"]).dup
+  until stack.empty?
+    node = stack.shift
+    stack.concat(node["children"]) if node["children"]
+    source = node["source"].to_s
+    fstype = node["fstype"].to_s
+    target = node["target"].to_s
+    next unless source.start_with?("/dev/")
+    next if skip_fstypes.include?(fstype)
+    size = node["size"].to_i
+    next if size <= 0
+    key = [source, target]
+    next if seen[key]
+    seen[key] = true
+    result << {
+      "type"   => "filesystem",
+      "source" => source,
+      "mount"  => target,
+      "fstype" => fstype,
+      "size"   => size,
+      "used"   => node["used"].to_i
+    }
+  end
+  result
+end
+
 def handle_info(conn)
   info = []
 
@@ -89,6 +124,8 @@ def handle_info(conn)
     info << entry
   end
 
+  info.concat(read_filesystems)
+
   if conn
     conn.puts JSON.generate(info)
   else