#12 implements net/openbsd support using shellout

Author: Vincent Landgraf

lib/vmstat.rb

@@ -98,4 +98,7 @@ def self.loopback_devices
 
 if RUBY_PLATFORM =~ /linux/
   Vmstat.send(:extend, Vmstat::ProcFS)
+elsif RUBY_PLATFORM =~ /(net|open)bsd/
+  # command based implementation of mem, net, cpu
+  require "vmstat/netopenbsd"
 end

lib/vmstat/netopenbsd.rb

@@ -0,0 +1,59 @@
+module Vmstat
+  def self.cpu
+    vmstat = `vmstat 1 1`.lines[2].chomp.split(/\s+/)
+    [Cpu.new(0, vmstat[-3].to_i, vmstat[-2].to_i, 0, vmstat[-1].to_i)]
+  end
+  
+  def self.memory
+    uvmexp = `vmstat -s`
+
+    Memory.new(
+      extract_uvm_val(uvmexp, 'bytes per page'),       # 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