3 files changed, 25 insertions, 29 deletions

diff --git a/src/entropy/proc_walk/info.txt b/src/entropy/proc_walk/info.txt
index 9039f0ad9..d8c60a2a7 100644
--- a/src/entropy/proc_walk/info.txt
+++ b/src/entropy/proc_walk/info.txt
@@ -1,11 +1,11 @@
-define ENTROPY_SRC_FTW
+define ENTROPY_SRC_PROC_WALKER
 
 <source>
-es_ftw.cpp
+proc_walk.cpp
 </source>
 
 <header:internal>
-es_ftw.h
+proc_walk.h
 </header:internal>
 
 <os>
diff --git a/src/entropy/proc_walk/es_ftw.cpp b/src/entropy/proc_walk/proc_walk.cpp
index 7d72e7752..050d9dcf7 100644
--- a/src/entropy/proc_walk/es_ftw.cpp
+++ b/src/entropy/proc_walk/proc_walk.cpp
@@ -1,11 +1,13 @@
 /*
-* FTW EntropySource
+* Entropy source based on reading files in /proc on the assumption
+* that a remote attacker will have difficulty guessing some of them.
+*
 * (C) 1999-2008,2012 Jack Lloyd
 *
 * Distributed under the terms of the Botan license
 */
 
-#include <botan/internal/es_ftw.h>
+#include <botan/internal/proc_walk.h>
 #include <botan/secmem.h>
 #include <cstring>
 #include <deque>
@@ -129,39 +131,31 @@ int Directory_Walker::next_fd()
 }
 
 /**
-* FTW_EntropySource Constructor
-*/
-FTW_EntropySource::FTW_EntropySource(const std::string& p) : path(p), dir(nullptr)
-   {
-   }
-
-/**
-* FTW_EntropySource Destructor
+* ProcWalking_EntropySource Destructor
 */
-FTW_EntropySource::~FTW_EntropySource()
+ProcWalking_EntropySource::~ProcWalking_EntropySource()
    {
-   delete dir;
-   dir = nullptr;
+   // for ~unique_ptr
    }
 
-void FTW_EntropySource::poll(Entropy_Accumulator& accum)
+void ProcWalking_EntropySource::poll(Entropy_Accumulator& accum)
    {
    const size_t MAX_FILES_READ_PER_POLL = 2048;
 
-   if(!dir)
-      dir = new Directory_Walker(path);
+   if(!m_dir)
+      m_dir = new Directory_Walker(m_path);
 
    secure_vector<byte>& io_buffer = accum.get_io_buffer(4096);
 
    for(size_t i = 0; i != MAX_FILES_READ_PER_POLL; ++i)
       {
-      int fd = dir->next_fd();
+      int fd = m_dir->next_fd();
 
       // If we've exhaused this walk of the directory, halt the poll
       if(fd == -1)
          {
-         delete dir;
-         dir = nullptr;
+         delete m_dir;
+         m_dir = nullptr;
          break;
          }
 
diff --git a/src/entropy/proc_walk/es_ftw.h b/src/entropy/proc_walk/proc_walk.h
index 3ba222d46..e493c7ed2 100644
--- a/src/entropy/proc_walk/es_ftw.h
+++ b/src/entropy/proc_walk/proc_walk.h
@@ -5,28 +5,30 @@
 * Distributed under the terms of the Botan license
 */
 
-#ifndef BOTAN_ENTROPY_SRC_FTW_H__
-#define BOTAN_ENTROPY_SRC_FTW_H__
+#ifndef BOTAN_ENTROPY_SRC_PROC_WALK_H__
+#define BOTAN_ENTROPY_SRC_PROC_WALK_H__
 
 #include <botan/entropy_src.h>
+#include <memory>
 
 namespace Botan {
 
 /**
 * File Tree Walking Entropy Source
 */
-class FTW_EntropySource : public EntropySource
+class ProcWalking_EntropySource : public EntropySource
    {
    public:
       std::string name() const { return "Proc Walker"; }
 
       void poll(Entropy_Accumulator& accum);
 
-      FTW_EntropySource(const std::string& root_dir);
-      ~FTW_EntropySource();
+      ProcWalking_EntropySource(const std::string& root_dir) : m_path(root_dir) {}
+
+      ~ProcWalking_EntropySource();
    private:
-      std::string path;
-      class File_Descriptor_Source* dir;
+      const std::string m_path;
+      class File_Descriptor_Source* m_dir;
    };
 
 }