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#!/usr/bin/ruby
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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