#!/usr/bin/env ruby

ipath = '/nwp/p0/incomplete/obsbf-etag.db'
lpath = '/nwp/p0/latest/obsbf-etag.db'

path = if File.exist?(ipath) then
         ipath
       elsif File.exist?(lpath) then
         STDERR.puts("missing #{ipath} - #{lpath} used")
         lpath
       else
  # ファイルが存在しない場合
  STDERR.puts("missing #{ipath}")
  puts "535"
  exit 0
end

mtime = File.mtime(path).utc
now = Time.now.utc
diff = now - mtime

# 出力
printf "%6.3f\n", diff