Check whether an IMAP Mailbox reaches for the quota. Should setup ~/.check-imap-quota.yml as follows: ``` host: localhost port: 143 user: masao password: XXXXXXXX ```

check-imap-quota

#!/usr/bin/env ruby

require "net/imap"
require "yaml"

CONFIG = File.join( ENV["HOME"], ".check-imap-quota.yml" )

if $0 == __FILE__
   config = YAML.load( open( CONFIG ){|i| i.read } )
   config[ "port" ] = config[ "port" ].to_i
   config[ "port" ] = 143 if config[ "port" ] == 0
   # If quota usage reaches this ratio, an alert is printed:
   config[ "alert" ] ||= 0.9

   # Net::IMAP.debug = true
   imap = Net::IMAP.new( config[ "host" ], config[ "port" ] )
   imap.login( config[ "user" ], config[ "password" ] )
   quota = imap.getquota( "ROOT" ).first
   #p quota
   ratio = quota.usage.to_i / quota.quota.to_f
   if ratio > config[ "alert" ]
      #puts "ALERT: Mailbox for #{ config["user"] }@#{ config["host"] }: reaches quota (#{ "%.1f%%" % (ratio*100) } = #{ quota.usage }/#{ quota.quota})"
      open( "|Mail -s 'ALERT: Mailbox for #{ config["user"] }@#{ config["host"] }' #{ config[ "email" ] }", "w" ) do |io|
         io.puts "ALERT: Mailbox for #{ config["user"] }@#{ config["host"] }: reaches quota (#{ "%.1f%%" % (ratio*100) } = #{ quota.usage }/#{ quota.quota})"
      end
   end
end