diff --git a/doc/CHANGELOG.md b/doc/CHANGELOG.md
index 46b39c43..cf295ec7 100644
--- a/doc/CHANGELOG.md
+++ b/doc/CHANGELOG.md
@@ -31,6 +31,8 @@ The full set of tests is only run for tagged releases.
 - the Coverity results triggered a general backend code review
   - fix coverity detected defects
   - get backend code `-Wall -Wextra -Wpedantic` clean
+  - exploit c++11 language constructs (e.g. emplace,lambda,auto,move,...)
+  - completely replace boost with std
 - add KW11-P (programmable clock) to all w11 systems. It is usefull in test
   benches (fast interrupt source) and enables on the long run to port the
   2.10BSD kernel profiling code to 2.11BSD.
@@ -102,11 +104,12 @@ The full set of tests is only run for tagged releases.
   - use auto, emplace() and range loops
   - use unique_ptr instead of free pointers, avoid explicit `delete`
   - add and use move semantic in RlinkCommandExpect
-  - replace boost with std
+  - completely replace boost with std
     - use std::unique_ptr instead of boost::scoped_ptr
     - use std::shared_ptr instead of boost
     - use std::function instead of boost
-    - use std::bind or in most cases a lambda instead of boost::bind
+    - use std::bind or in most cases a lambda, instead of boost::bind
+    - use std::thread instead of boost
     - use mutex and friends from std:: instead from boost::
       - use std::mutex
       - use std::recursive_mutex
diff --git a/doc/INSTALL.md b/doc/INSTALL.md
index ba51d510..a185f05a 100644
--- a/doc/INSTALL.md
+++ b/doc/INSTALL.md
@@ -57,9 +57,6 @@ distributions should be straight forward.
 - building and using the rlink backend software requires:
   - full C/C++ development chain (gcc,g++,cpp,make)  
       -> package: `build-essential`
-  - Boost C++ library (>= 1.40), with date-time, thread, and regex  
-    -> package: `libboost-dev` `libboost-date-time-dev` `libboost-thread-dev`
-                `libboost-regex-dev`
   - libusb 1.0 (>= 1.0.6)  
     -> package: `libusb-1.0-0-dev`
   - Perl (>= 5.10)  (usually included in base installations)
@@ -108,8 +105,9 @@ For bash and alike use
       export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$RETROBASE/tools/lib
       export MANPATH=$MANPATH:$RETROBASE/tools/man
 
-In most cases the boost library version coming with the distribution will
-work, similar for Tcl, in those cases simply use
+Boost was essential in the pre-c++11 times, but has been completely replaced
+by std:: classes provided by c++11. In most cases the Tcl version coming with
+the distribution will work, in those cases simply use
 
       export TCLINC=/usr/include/tcl8.6
       export TCLLIBNAME=tcl8.6
@@ -147,7 +145,6 @@ A C++ compiler with full `c++11` support is therefore needed, so either
 Required tools and libraries:
 
     g++    >= 4.8.1  (see c++11 usage above)
-    boost  >= 1.35   (boost::thread api changed, new one is used)
     libusb >= 1.0.5  (timerfd support)
 
 Build was tested under:
diff --git a/tools/src/librlink/RlinkPortCuff.cpp b/tools/src/librlink/RlinkPortCuff.cpp
index 96aee5fb..7239f465 100644
--- a/tools/src/librlink/RlinkPortCuff.cpp
+++ b/tools/src/librlink/RlinkPortCuff.cpp
@@ -1,4 +1,4 @@
-// $Id: RlinkPortCuff.cpp 1081 2018-12-14 22:29:42Z mueller $
+// $Id: RlinkPortCuff.cpp 1088 2018-12-17 17:37:00Z mueller $
 //
 // Copyright 2012-2018 by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>
 //
@@ -13,6 +13,7 @@
 // 
 // Revision History: 
 // Date         Rev Version  Comment
+// 2018-12-17  1088   1.1.9  use std::thread instead of boost
 // 2018-12-14  1081   1.1.8  use std::bind instead of boost
 // 2018-11-09  1066   1.1.7  use auto
 // 2018-10-27  1059   1.1.6  coverity fixup (uncaught exception in dtor)
@@ -244,7 +245,7 @@ bool RlinkPortCuff::Open(const std::string& url, RerrMsg& emsg)
   libusb_set_pollfd_notifiers(fpUsbContext, ThunkPollfdAdd,
                               ThunkPollfdRemove, this);
 
-  fDriverThread =  boost::thread(std::bind(&RlinkPortCuff::Driver, this));
+  fDriverThread =  thread([this](){ Driver(); });
 
   fIsOpen  = true;
 
@@ -275,13 +276,7 @@ void RlinkPortCuff::Cleanup()
   CloseFd(fFdWrite);
   
   // wait till driver thread terminates
-  // use timed join, throw in case driver doesn't stop
-  if (fDriverThread.get_id() != boost::thread::id()) {
-    if (!fDriverThread.timed_join(boost::posix_time::milliseconds(500))) {
-      throw Rexception("RlinkPortCuff::Cleanup()",
-                       "driver thread failed to stop");
-    }
-  }
+  if (fDriverThread.joinable()) fDriverThread.join();
 
   // cleanup pipes
   CloseFd(fFdRead);
@@ -332,7 +327,7 @@ bool RlinkPortCuff::OpenPipe(int& fdread, int& fdwrite, RerrMsg& emsg)
 //------------------------------------------+-----------------------------------
 //! FIXME_docs
 
-// executed in separate boost thread !!
+// executed in separate thread !!
 void RlinkPortCuff::Driver()
 {
   try {
diff --git a/tools/src/librlink/RlinkPortCuff.hpp b/tools/src/librlink/RlinkPortCuff.hpp
index 3c8803a3..bca2cfc4 100644
--- a/tools/src/librlink/RlinkPortCuff.hpp
+++ b/tools/src/librlink/RlinkPortCuff.hpp
@@ -1,4 +1,4 @@
-// $Id: RlinkPortCuff.hpp 1060 2018-10-27 11:32:39Z mueller $
+// $Id: RlinkPortCuff.hpp 1088 2018-12-17 17:37:00Z mueller $
 //
 // Copyright 2012-2018 by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>
 //
@@ -13,6 +13,7 @@
 // 
 // Revision History: 
 // Date         Rev Version  Comment
+// 2018-12-17  1088   1.0.2  use std::thread instead of boost
 // 2013-01-02   467   1.0.1  get cleanup code right; add USBErrorName()
 // 2012-12-26   465   1.0    Initial version
 // ---------------------------------------------------------------------------
@@ -33,8 +34,7 @@
 
 #include <vector>
 #include <deque>
-
-#include "boost/thread/thread.hpp"
+#include <thread>
 
 namespace Retro {
 
@@ -72,7 +72,7 @@ namespace Retro {
     protected:
       int           fFdReadDriver;          //!< fd for read (driver end)
       int           fFdWriteDriver;         //!< fd for write (driver end)
-      boost::thread fDriverThread;          //!< driver thread
+      std::thread   fDriverThread;          //!< driver thread
       libusb_context*  fpUsbContext;
       libusb_device**  fpUsbDevList;
       ssize_t          fUsbDevCount;
diff --git a/tools/src/librlink/RlinkServer.cpp b/tools/src/librlink/RlinkServer.cpp
index 354f9e97..cf954e8c 100644
--- a/tools/src/librlink/RlinkServer.cpp
+++ b/tools/src/librlink/RlinkServer.cpp
@@ -1,4 +1,4 @@
-// $Id: RlinkServer.cpp 1085 2018-12-16 14:11:16Z mueller $
+// $Id: RlinkServer.cpp 1088 2018-12-17 17:37:00Z mueller $
 //
 // Copyright 2013-2018 by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>
 //
@@ -13,7 +13,7 @@
 // 
 // Revision History: 
 // Date         Rev Version  Comment
-// 2018-12-17  1085   1.2.8  use std::lock_guard instead of boost
+// 2018-12-17  1088   2.2.8  use std::lock_guard, std::thread instead of boost
 // 2018-12-15  1083   2.2.7  for std::function setups: use rval ref and move
 // 2018-12-14  1081   2.2.6  use std::bind instead of boost
 // 2018-12-07  1078   2.2.5  use std::shared_ptr instead of boost
@@ -36,6 +36,8 @@
   \brief   Implemenation of RlinkServer.
 */
 
+#include <unistd.h>
+
 #include "librtools/Rexception.hpp"
 #include "librtools/RosFill.hpp"
 #include "librtools/RosPrintf.hpp"
@@ -188,7 +190,7 @@ void RlinkServer::GetAttnInfo(AttnArgs& args)
 //! FIXME_docs
 
 void RlinkServer::RemoveAttnHandler(uint16_t mask, void* cdata)
-{    
+{
   lock_guard<RlinkConnect> lock(*fspConn);
 
   AttnId id(mask, cdata);
@@ -269,7 +271,8 @@ void RlinkServer::Start()
 //! FIXME_docs
 
 void RlinkServer::Stop()
-{    
+{
+  if (!IsActive()) return;
   fELoop.Stop();
   Wakeup();
   fServerThread.join();
@@ -280,7 +283,7 @@ void RlinkServer::Stop()
 //! FIXME_docs
 
 void RlinkServer::Resume()
-{    
+{
   StartOrResume(true);
   return;
 }
@@ -289,9 +292,9 @@ void RlinkServer::Resume()
 //! FIXME_docs
 
 void RlinkServer::Wakeup()
-{    
+{
   uint64_t one(1);
-  int irc = write(fWakeupEvent, &one, sizeof(one));
+  int irc = ::write(fWakeupEvent, &one, sizeof(one));
   if (irc < 0) 
     throw Rexception("RlinkServer::Wakeup()", 
                      "write() to eventfd failed: ", errno);
@@ -302,7 +305,7 @@ void RlinkServer::Wakeup()
 //! FIXME_docs
 
 void RlinkServer::SignalAttnNotify(uint16_t apat)
-{    
+{
   // only called under lock !!
   if (apat & fAttnNotiPatt) {
     RlogMsg lmsg(LogFile(), 'W');
@@ -322,8 +325,8 @@ void RlinkServer::SignalAttnNotify(uint16_t apat)
  */
 
 bool RlinkServer::IsActive() const
-{    
-  return fServerThread.get_id() != boost::thread::id();
+{
+  return fServerThread.joinable();
 }
 
 //------------------------------------------+-----------------------------------
@@ -334,7 +337,7 @@ bool RlinkServer::IsActive() const
 
 bool RlinkServer::IsActiveInside() const
 {
-  return IsActive() && boost::this_thread::get_id() == fServerThread.get_id();
+  return IsActive() && this_thread::get_id() == fServerThread.get_id();
 }
 
 //------------------------------------------+-----------------------------------
@@ -346,7 +349,7 @@ bool RlinkServer::IsActiveInside() const
 
 bool RlinkServer::IsActiveOutside() const
 {
-  return IsActive() && boost::this_thread::get_id() != fServerThread.get_id();
+  return IsActive() && this_thread::get_id() != fServerThread.get_id();
 }
 
 //------------------------------------------+-----------------------------------
@@ -421,8 +424,7 @@ void RlinkServer::StartOrResume(bool resume)
   
   // and start server thread
   fELoop.UnStop();
-  fServerThread = boost::thread(std::bind(&RlinkServerEventLoop::EventLoop,
-                                          &fELoop));
+  fServerThread = thread([this](){ fELoop.EventLoop(); });
 
   if (resume) {
     RerrMsg emsg;
@@ -557,7 +559,7 @@ int RlinkServer::WakeupHandler(const pollfd& pfd)
   if (pfd.revents & (~pfd.events)) return -1;
 
   uint64_t buf;
-  int irc = read(fWakeupEvent, &buf, sizeof(buf));
+  int irc = ::read(fWakeupEvent, &buf, sizeof(buf));
   if (irc < 0) 
     throw Rexception("RlinkServer::WakeupHandler()", 
                      "read() from eventfd failed: ", errno);
diff --git a/tools/src/librlink/RlinkServer.hpp b/tools/src/librlink/RlinkServer.hpp
index 78025704..4926d6a0 100644
--- a/tools/src/librlink/RlinkServer.hpp
+++ b/tools/src/librlink/RlinkServer.hpp
@@ -1,4 +1,4 @@
-// $Id: RlinkServer.hpp 1084 2018-12-16 12:23:53Z mueller $
+// $Id: RlinkServer.hpp 1088 2018-12-17 17:37:00Z mueller $
 //
 // Copyright 2013-2018 by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>
 //
@@ -13,6 +13,7 @@
 // 
 // Revision History: 
 // Date         Rev Version  Comment
+// 2018-12-17  1088   2.2.6  use std::thread instead of boost
 // 2018-12-16  1084   2.2.5  use =delete for noncopyable instead of boost
 // 2018-12-15  1083   2.2.4  for std::function setups: use rval ref and move
 // 2018-12-14  1081   2.2.3  use std::function instead of boost
@@ -42,8 +43,7 @@
 #include <list>
 #include <memory>
 #include <functional>
-
-#include "boost/thread/thread.hpp"
+#include <thread>
 
 #include "librtools/Rstats.hpp"
 
@@ -179,7 +179,7 @@ namespace Retro {
       std::list<actnhdl_t>  fActnList;
       ReventFd      fWakeupEvent;
       RlinkServerEventLoop fELoop;
-      boost::thread fServerThread;
+      std::thread   fServerThread;
       uint16_t      fAttnPatt;              //!< current attn pattern
       uint16_t      fAttnNotiPatt;          //!< attn notifier pattern
       uint32_t      fTraceLevel;            //!< trace level
diff --git a/tools/src/librlinktpp/RtclAttnShuttle.cpp b/tools/src/librlinktpp/RtclAttnShuttle.cpp
index a646b96d..f08bfd90 100644
--- a/tools/src/librlinktpp/RtclAttnShuttle.cpp
+++ b/tools/src/librlinktpp/RtclAttnShuttle.cpp
@@ -1,4 +1,4 @@
-// $Id: RtclAttnShuttle.cpp 1082 2018-12-15 13:56:20Z mueller $
+// $Id: RtclAttnShuttle.cpp 1088 2018-12-17 17:37:00Z mueller $
 //
 // Copyright 2013-2018 by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>
 //
@@ -28,6 +28,7 @@
   \brief   Implemenation of class RtclAttnShuttle.
  */
 
+#include <unistd.h>
 #include <errno.h>
 
 #include "librtools/Rexception.hpp"
diff --git a/tools/src/librlinktpp/RtclRlinkServer.cpp b/tools/src/librlinktpp/RtclRlinkServer.cpp
index 9f507bfb..8197abb1 100644
--- a/tools/src/librlinktpp/RtclRlinkServer.cpp
+++ b/tools/src/librlinktpp/RtclRlinkServer.cpp
@@ -1,4 +1,4 @@
-// $Id: RtclRlinkServer.cpp 1087 2018-12-17 08:25:37Z mueller $
+// $Id: RtclRlinkServer.cpp 1088 2018-12-17 17:37:00Z mueller $
 //
 // Copyright 2013-2018 by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>
 //
@@ -140,11 +140,13 @@ int RtclRlinkServer::M_server(RtclArgs& args)
   if (args.NextOpt(opt, optset)) {
     if        (opt == "-start") {           // server -start
       if (!args.AllDone()) return kERR;
+      if (Obj().IsActive()) return args.Quit("-E: server already running");
       Obj().Start();
     } else if (opt == "-stop") {            // server -stop
       if (!args.AllDone()) return kERR;
       Obj().Stop();
     } else if (opt == "-resume") {          // server -resume
+      if (Obj().IsActive()) return args.Quit("-E: server already running");
       if (!args.AllDone()) return kERR;
       Obj().Resume();
     } else if (opt == "-test") {            // server -test
diff --git a/tools/src/librtcltools/RtclGetBase.hpp b/tools/src/librtcltools/RtclGetBase.hpp
index 3e990958..2b5e1445 100644
--- a/tools/src/librtcltools/RtclGetBase.hpp
+++ b/tools/src/librtcltools/RtclGetBase.hpp
@@ -1,4 +1,4 @@
-// $Id: RtclGetBase.hpp 983 2018-01-02 20:35:59Z mueller $
+// $Id: RtclGetBase.hpp 1088 2018-12-17 17:37:00Z mueller $
 //
 // Copyright 2013- by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>
 //
@@ -29,8 +29,6 @@
 #include <cstdint>
 #include <string>
 
-#include "boost/function.hpp"
-
 namespace Retro {
 
   class RtclGetBase {
diff --git a/tools/src/librtcltools/RtclGetList.hpp b/tools/src/librtcltools/RtclGetList.hpp
index 6703fde2..49c39e7f 100644
--- a/tools/src/librtcltools/RtclGetList.hpp
+++ b/tools/src/librtcltools/RtclGetList.hpp
@@ -1,4 +1,4 @@
-// $Id: RtclGetList.hpp 1084 2018-12-16 12:23:53Z mueller $
+// $Id: RtclGetList.hpp 1088 2018-12-17 17:37:00Z mueller $
 //
 // Copyright 2013-2018 by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>
 //
@@ -34,6 +34,7 @@
 #include <cstdint>
 #include <string>
 #include <map>
+#include <memory>
 #include <functional>
 
 #include "RtclGet.hpp"
diff --git a/tools/src/librtcltools/RtclSetBase.hpp b/tools/src/librtcltools/RtclSetBase.hpp
index a4bb837e..82808563 100644
--- a/tools/src/librtcltools/RtclSetBase.hpp
+++ b/tools/src/librtcltools/RtclSetBase.hpp
@@ -1,4 +1,4 @@
-// $Id: RtclSetBase.hpp 983 2018-01-02 20:35:59Z mueller $
+// $Id: RtclSetBase.hpp 1088 2018-12-17 17:37:00Z mueller $
 //
 // Copyright 2013- by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>
 //
@@ -29,8 +29,6 @@
 #include <cstdint>
 #include <string>
 
-#include "boost/function.hpp"
-
 #include "RtclArgs.hpp"
 
 namespace Retro {
diff --git a/tools/src/librtcltools/RtclSetList.hpp b/tools/src/librtcltools/RtclSetList.hpp
index 63a37878..918b385a 100644
--- a/tools/src/librtcltools/RtclSetList.hpp
+++ b/tools/src/librtcltools/RtclSetList.hpp
@@ -1,4 +1,4 @@
-// $Id: RtclSetList.hpp 1084 2018-12-16 12:23:53Z mueller $
+// $Id: RtclSetList.hpp 1088 2018-12-17 17:37:00Z mueller $
 //
 // Copyright 2013-2018 by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>
 //
@@ -34,6 +34,7 @@
 #include <cstdint>
 #include <string>
 #include <map>
+#include <memory>
 #include <functional>
 
 #include "RtclSet.hpp"
diff --git a/tools/src/librtools/Rtools.cpp b/tools/src/librtools/Rtools.cpp
index afb87ce7..080201ed 100644
--- a/tools/src/librtools/Rtools.cpp
+++ b/tools/src/librtools/Rtools.cpp
@@ -1,4 +1,4 @@
-// $Id: Rtools.cpp 1063 2018-10-29 18:37:42Z mueller $
+// $Id: Rtools.cpp 1088 2018-12-17 17:37:00Z mueller $
 //
 // Copyright 2011-2018 by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>
 //
@@ -186,7 +186,7 @@ void Catch2Cerr(const char* msg, std::function<void()> func)
          << " caught and dropped in " << msg << endl;
    } catch (exception& e) {
     cerr << "Catch2Cerr-E: exception '" << e.what()
-         << " caught and dropped in " << msg << endl;
+         << "' caught and dropped in " << msg << endl;
   } catch(...) {
     cerr << "Catch2Cerr-E: non std::exception"
          << " caught and dropped in " << msg << endl;
diff --git a/tools/src/librw11/Rw11Cpu.cpp b/tools/src/librw11/Rw11Cpu.cpp
index 3863f651..36031873 100644
--- a/tools/src/librw11/Rw11Cpu.cpp
+++ b/tools/src/librw11/Rw11Cpu.cpp
@@ -1,4 +1,4 @@
-// $Id: Rw11Cpu.cpp 1085 2018-12-16 14:11:16Z mueller $
+// $Id: Rw11Cpu.cpp 1088 2018-12-17 17:37:00Z mueller $
 //
 // Copyright 2013-2018 by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>
 //
@@ -48,6 +48,7 @@
 #include <stdlib.h>
 #include <fcntl.h>
 #include <errno.h>
+#include <unistd.h>
 
 #include <vector>
 #include <map>
@@ -573,7 +574,7 @@ bool Rw11Cpu::LoadAbs(const std::string& fname, RerrMsg& emsg, bool trace)
 
   while (go) {
     uint8_t byte;
-    int irc = read(fd, &byte, 1);
+    int irc = ::read(fd, &byte, 1);
     if (irc == 0) {
       if (state == s_chr0) {
         ok = true;
@@ -701,7 +702,7 @@ bool Rw11Cpu::LoadAbs(const std::string& fname, RerrMsg& emsg, bool trace)
     } // switch(state)
   } // while(go)
   
-  close(fd);
+  ::close(fd);
   
   return ok;
 }
diff --git a/tools/src/librw11/Rw11VirtEthTap.cpp b/tools/src/librw11/Rw11VirtEthTap.cpp
index c2f7473a..cc907dca 100644
--- a/tools/src/librw11/Rw11VirtEthTap.cpp
+++ b/tools/src/librw11/Rw11VirtEthTap.cpp
@@ -1,4 +1,4 @@
-// $Id: Rw11VirtEthTap.cpp 1082 2018-12-15 13:56:20Z mueller $
+// $Id: Rw11VirtEthTap.cpp 1088 2018-12-17 17:37:00Z mueller $
 //
 // Copyright 2014-2018 by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>
 //
@@ -31,6 +31,7 @@
 #include <fcntl.h>
 #include <errno.h>
 #include <unistd.h>
+#include <string.h>
 
 #include <sys/ioctl.h>
 #include <net/if.h>
diff --git a/tools/src/librw11/Rw11VirtTermTcp.cpp b/tools/src/librw11/Rw11VirtTermTcp.cpp
index 6eca8bfe..4febd5c4 100644
--- a/tools/src/librw11/Rw11VirtTermTcp.cpp
+++ b/tools/src/librw11/Rw11VirtTermTcp.cpp
@@ -1,4 +1,4 @@
-// $Id: Rw11VirtTermTcp.cpp 1082 2018-12-15 13:56:20Z mueller $
+// $Id: Rw11VirtTermTcp.cpp 1088 2018-12-17 17:37:00Z mueller $
 //
 // Copyright 2013-2018 by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>
 //
@@ -35,6 +35,7 @@
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <netdb.h>
+#include <unistd.h>
 
 #include <sstream>
 
@@ -152,7 +153,7 @@ bool Rw11VirtTermTcp::Open(const std::string& url, RerrMsg& emsg)
   int on = 1;
   if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) < 0) {
     emsg.InitErrno("Rw11VirtTermTcp::Open","setsockop() failed: ", errno);
-    close(fd);
+    ::close(fd);
     return false;
   }
 
@@ -164,13 +165,13 @@ bool Rw11VirtTermTcp::Open(const std::string& url, RerrMsg& emsg)
   // Note: ::bind needed below to avoid collision with std::bind... 
   if (::bind(fd, (sockaddr*) &sa, sizeof(sa)) < 0) {
     emsg.InitErrno("Rw11VirtTermTcp::Open","bind() failed: ", errno);
-    close(fd);
+    ::close(fd);
     return false;
   }
 
   if (listen(fd, 1) <0) {
     emsg.InitErrno("Rw11VirtTermTcp::Open","listen() failed: ", errno);
-    close(fd);
+    ::close(fd);
     return false;    
   }
 
@@ -219,7 +220,7 @@ bool Rw11VirtTermTcp::Snd(const uint8_t* data, size_t count, RerrMsg& /*emsg*/)
       *pobuf++ = *pdata++;
     }
 
-    int irc = write(fFd, obuf, pobuf-obuf);
+    int irc = ::write(fFd, obuf, pobuf-obuf);
     if (irc < 0) {
       RlogMsg lmsg(LogFile(),'E');
       RerrMsg emsg("Rw11VirtTermTcp::Snd", 
@@ -295,11 +296,11 @@ int Rw11VirtTermTcp::ListenPollHandler(const pollfd& pfd)
   int nerr = 0;
 
   // send initial negotiation WILLs and DOs
-  if (write(fFd, buf_1, sizeof(buf_1)) < 0) nerr += 1;
-  if (write(fFd, buf_2, sizeof(buf_2)) < 0) nerr += 1;
-  if (write(fFd, buf_3, sizeof(buf_3)) < 0) nerr += 1;
-  if (write(fFd, buf_4, sizeof(buf_4)) < 0) nerr += 1;
-  if (write(fFd, buf_5, sizeof(buf_5)) < 0) nerr += 1;
+  if (::write(fFd, buf_1, sizeof(buf_1)) < 0) nerr += 1;
+  if (::write(fFd, buf_2, sizeof(buf_2)) < 0) nerr += 1;
+  if (::write(fFd, buf_3, sizeof(buf_3)) < 0) nerr += 1;
+  if (::write(fFd, buf_4, sizeof(buf_4)) < 0) nerr += 1;
+  if (::write(fFd, buf_5, sizeof(buf_5)) < 0) nerr += 1;
 
   // send connect message
   if (nerr==0) {
@@ -322,7 +323,7 @@ int Rw11VirtTermTcp::ListenPollHandler(const pollfd& pfd)
   }
 
   if (nerr) {
-    close(fFd);
+    ::close(fFd);
     fFd = -1;
     RlogMsg lmsg(LogFile(),'E');
     RerrMsg emsg("Rw11VirtTermTcp::ListenPollHandler", 
@@ -360,7 +361,7 @@ int Rw11VirtTermTcp::RcvPollHandler(const pollfd& pfd)
     uint8_t obuf[1024];
     uint8_t* pobuf = obuf;
 
-    irc = read(fFd, ibuf, 1024);
+    irc = ::read(fFd, ibuf, 1024);
 
     if (irc < 0 && (errno == EAGAIN || errno == EWOULDBLOCK)) return 0;
 
@@ -425,7 +426,7 @@ int Rw11VirtTermTcp::RcvPollHandler(const pollfd& pfd)
       RlogMsg lmsg(LogFile(),'I');
       lmsg << "TermTcp: close on " << fChannelId << " for " << Unit().Name();
     }
-    close(fFd);
+    ::close(fFd);
     fFd = -1;
     Server().AddPollHandler([this](const pollfd& pfd)
                               { return ListenPollHandler(pfd); },