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#!/usr/bin/ruby
# Copyright (c) 2006 Peter Palfrader <peter@palfrader.org>
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
require 'optparse'
NAGIOS_STATUS = { :OK => 0, :WARNING => 1, :CRITICAL => 2, :UNKNOWN => -1 };
@verbose = 0;
@additional_nameservers = []
def show_help(parser, code=0, io=STDOUT)
program_name = File.basename($0, '.*')
io.puts "Usage: #{program_name} [options]"
io.puts parser.summarize
exit(code)
end
ARGV.options do |opts|
opts.on_tail("-h", "--help" , "Display this help screen") { show_help(opts) }
opts.parse!
end
show_help(ARGV.options, 1, STDERR) if ARGV.length > 0
unless File.executable?('/sbin/ip')
puts "/sbin/ip is not executable"
exit NAGIOS_STATUS[:UNKNOWN]
end
ip_output = nil
IO.popen("-") do |f|
unless f # child
begin
exec('/sbin/ip', 'route', 'show', '0.0.0.0/0')
rescue => e
puts "Cannot exec ip: "+e.message
exit 1
end
end
ip_output = f.readlines
end
if $? != 0
puts "Child exited with non-zero exit code(%d): %s"%[$? >> 8, ip_output]
else
if ip_output.length > 0
puts "OK: %s" % [ip_output.join(' ')]
exit NAGIOS_STATUS[:OK]
else
puts "CRITICAL: no default route found."
exit NAGIOS_STATUS[:CRITICAL]
end
end
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