Add DragonFlyBSD support

process_dragonfly.go

@@ -0,0 +1,29 @@
+// +build dragonfly
+
+package ps
+
+import (
+	"fmt"
+	"io/ioutil"
+)
+
+// Refresh reloads all the data associated with this process.
+func (p *UnixProcess) Refresh() error {
+	statPath := fmt.Sprintf("/proc/%d/status", p.pid)
+	dataBytes, err := ioutil.ReadFile(statPath)
+	if err != nil {
+		return err
+	}
+
+	data := string(dataBytes)
+
+	_, err = fmt.Sscanf(data,
+		"%s %d %d %d %d",
+		&p.binary,
+		&p.pid,
+		&p.ppid,
+		&p.pgrp,
+		&p.sid)
+
+	return err
+}

process_unix.go

@@ -1,4 +1,4 @@
-// +build linux solaris
+// +build linux solaris dragonfly
 
 package ps
 

process_unix_test.go

@@ -1,4 +1,4 @@
-// +build linux solaris
+// +build linux solaris dragonfly
 
 package ps