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module Vmstat
def self.cpu
cptime = `sysctl kern.cp_time`.split(/=/).last
user, nice, sys, irq, idle = cptime.split(/,/).map(&:to_i)
[Cpu.new(0, user, sys + irq, nice, idle)]
end
def self.memory
uvmexp = `vmstat -s`
Memory.new(
# pagesize call is not used to avoid double shell out
pagesize, # pagesize
extract_uvm_val(uvmexp, 'pages managed'), # wired
extract_uvm_val(uvmexp, 'pages active'), # active
extract_uvm_val(uvmexp, 'pages inactive'), # inactive
extract_uvm_val(uvmexp, 'pages free'), # free
extract_uvm_val(uvmexp, 'pagein operations'), # pageins
extract_uvm_val(uvmexp, 'pages being paged out') # pageouts
)
end
def self.network_interfaces
bytes = `netstat -ibq`.lines.grep(/<Link>/) # bytes
pkgs = `netstat -iqd`.lines.grep(/<Link>/) # packages
itf = Hash.new { |h, k| h[k] = NetworkInterface.new(k) }
bytes.each do |line|
# Name Mtu Network Address Ibytes Obytes
name, _, _, _, ibytes, obytes = line.split(/\s+/)
itf[name].in_bytes = ibytes.to_i
itf[name].out_bytes = obytes.to_i
end
pkgs.each do |line|
# Name Mtu Network Address Ipkts Ierrs Opkts Oerrs Colls Drop
name, _, _, _, _, ierrs, _, oerrs, _, drop = line.split(/\s+/)
itf[name].in_errors = ierrs.to_i
itf[name].in_drops = drop.to_i
itf[name].out_errors = oerrs.to_i
end
itf.each do |name, nic|
if name =~ /lo\d+/
nic.type = NetworkInterface::LOOPBACK_TYPE
else
nic.type = NetworkInterface::ETHERNET_TYPE
end
end
itf.values
end
def self.extract_uvm_val(uvmexp, name)
regexp = Regexp.new('(\d+)\s' + name)
uvmexp.lines.grep(regexp) do |line|
return $1.to_i
end
end
end
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