From 8fe5ec7381778bbbf90a7ad0e9d1f05cb2d9ac23 Mon Sep 17 00:00:00 2001
From: Jakob Unterwurzacher <jakobunt@gmail.com>
Date: Fri, 18 Sep 2015 22:14:07 +0200
Subject: [PATCH] Add --cpuprofile flag

---
 main.go      | 18 ++++++++++++++----
 main_test.go | 16 +++++++++++-----
 2 files changed, 25 insertions(+), 9 deletions(-)

diff --git a/main.go b/main.go
index f974e7b..4ee9080 100644
--- a/main.go
+++ b/main.go
@@ -1,6 +1,7 @@
 package main
 
 import (
+	"runtime/pprof"
 	"io/ioutil"
 	"flag"
 	"fmt"
@@ -73,7 +74,19 @@ func main() {
 	flag.BoolVar(&fusedebug, "fusedebug", false, "Enable fuse library debug output")
 	flag.BoolVar(&init, "init", false, "Initialize encrypted directory")
 	flag.BoolVar(&zerokey, "zerokey", false, "Use all-zero dummy master key")
+	var cpuprofile = flag.String("cpuprofile", "", "write cpu profile to file")
+
 	flag.Parse()
+	if *cpuprofile != "" {
+        f, err := os.Create(*cpuprofile)
+        if err != nil {
+            fmt.Println(err)
+			os.Exit(ERREXIT_INIT)
+        }
+		fmt.Printf("Writing CPU profile to %s\n", *cpuprofile)
+        pprof.StartCPUProfile(f)
+        defer pprof.StopCPUProfile()
+    }
 	if debug {
 		cryptfs.Debug.Enable()
 		cryptfs.Debug.Printf("Debug output enabled\n")
@@ -102,7 +115,7 @@ func main() {
 	key := make([]byte, cryptfs.KEY_LEN)
 	if zerokey {
 		fmt.Printf("Zerokey mode active: using all-zero dummy master key.\n")
-		fmt.Printf("ZEROKEY MODE PROVIDES NO SECURITY AT ALL.\n")
+		fmt.Printf("ZEROKEY MODE PROVIDES NO SECURITY AT ALL AND SHOULD ONLY BE USED FOR TESTING.\n")
 	} else {
 		cfname := filepath.Join(cipherdir, cryptfs.ConfDefaultName)
 		_, err = os.Stat(cfname)
@@ -218,9 +231,6 @@ func cluefsFrontend(key []byte, cipherdir string, mountpoint string) {
 		fmt.Println(err)
 		os.Exit(ERREXIT_MOUNT2)
 	}
-
-	// We are done
-	os.Exit(0)
 }
 
 func pathfsFrontend(key []byte, cipherdir string, mountpoint string, debug bool){
diff --git a/main_test.go b/main_test.go
index 667d626..93aa6ff 100644
--- a/main_test.go
+++ b/main_test.go
@@ -16,12 +16,16 @@ const tmpDir = "main_test_tmp/"
 const plainDir = tmpDir + "plain/"
 const cipherDir = tmpDir + "cipher/"
 
-func TestMain(m *testing.M) {
-
+func unmount() error {
 	fu := exec.Command("fusermount", "-u", plainDir)
 	fu.Stdout = os.Stdout
 	fu.Stderr = os.Stderr
-	fu.Run()
+	return fu.Run()
+}
+
+func TestMain(m *testing.M) {
+
+	unmount()
 	os.RemoveAll(tmpDir)
 
 	err := os.MkdirAll(plainDir, 0777)
@@ -34,6 +38,7 @@ func TestMain(m *testing.M) {
 		panic("Could not create cipherDir")
 	}
 
+	//c := exec.Command("./gocryptfs", "--zerokey", "--cpuprofile", "/tmp/gcfs.cpu", cipherDir, plainDir)
 	c := exec.Command("./gocryptfs", "--zerokey", cipherDir, plainDir)
 	c.Stdout = os.Stdout
 	c.Stderr = os.Stderr
@@ -43,7 +48,7 @@ func TestMain(m *testing.M) {
 
 	r := m.Run()
 
-	fu.Run()
+	unmount()
 	os.Exit(r)
 }
 
@@ -142,7 +147,7 @@ func BenchmarkStreamRead(t *testing.B) {
 
 	if t.N > mb {
 		// Grow file so we can satisfy the test
-		fmt.Printf("Growing file to %d MB\n", t.N)
+		fmt.Printf("Growing file to %d MB... ", t.N)
 		f2, err := os.OpenFile(fn, os.O_WRONLY | os.O_APPEND, 0666)
 		if err != nil {
 			fmt.Println(err)
@@ -156,6 +161,7 @@ func BenchmarkStreamRead(t *testing.B) {
 			}
 		}
 		f2.Close()
+		fmt.Printf("done\n")
 	}
 
 	file, err := os.Open(plainDir + "BenchmarkWrite")