#!/usr/bin/ruby

require 'filesystem'

ignorefs = ["NFS", "nfs", "nfs4", "nfsd", "afs", "binfmt_misc", "proc", "smbfs",
	    "autofs", "iso9660", "ncpfs", "coda", "devpts", "ftpfs", "devfs",
	    "mfs", "shfs", "sysfs", "cifs", "lustre_lite", "tmpfs", "usbfs",
	    "udf", "fusectl", "fuse.snapshotfs", "rpc_pipefs"]
mountpoints = {}

FileSystem.mounts.each do |m|
	if ((not ignorefs.include?(m.fstype)) && (m.options !~ /bind/))
		mountpoints[m.device] = { 'type' => m.fstype, 'mount' => m.mount }
	end
end

def check_ext3(dev, mnt)
	output=%x{tune2fs -l #{dev}}
	if output =~ /FS Error count:\s*(\d+)/ and $1.to_i > 0
		return "#{dev} (#{mnt}) has #{$1} errors"
	end
end

output = []
mountpoints.keys.each do |m|
	temp = ''
	begin
		if mountpoints[m]['type'] =~ /ext/
			temp = check_ext3(m, mountpoints[m]['mount'])
		end
	rescue Exception => e
	end
	if temp && (temp.length > 0)
		output << temp
	end
end

if output.length > 0
	puts output.join("\n")
	exit 1
end
puts "OK: All filesystems ok."
exit 0