Added thread naming in taped.

The different processes of taped can now be identified as in this exemple:
[eric@localhost ~]$ ps -ax -o "pid comm cmd"  | grep /usr/bin/cta-taped
[...]
32593 cta-taped-main  /usr/bin/cta-taped -fl /cta-taped.log
32800 cta-tpd-VDSTK11 /usr/bin/cta-taped -fl /cta-taped.log
32801 cta-taped-gc    /usr/bin/cta-taped -fl /cta-taped.log

tapeserver/daemon/DriveHandler.cpp

@@ -38,6 +38,7 @@
 #include <signal.h>
 #include <sys/wait.h>
 #include <set>
+#include <sys/prctl.h>
 
 namespace cta { namespace tape { namespace  daemon {
 
@@ -843,6 +844,11 @@ int DriveHandler::runChild() {
   // Otherwise, this session will run a regular data transfer session which will
   // schedule itself info an empty drive probe, archive, retrieve or label session.
   
+  // Set the thread name for process ID:
+  std::string threadName = "cta-tpd-";
+  threadName+=m_configLine.unitName;
+  prctl(PR_SET_NAME, threadName.c_str());
+  
   // Create the channel to talk back to the parent process.
   cta::tape::daemon::DriveHandlerProxy driveHandlerProxy(*m_socketPair);
   

tapeserver/daemon/GarbageCollectorHandler.cpp

@@ -32,6 +32,7 @@
 
 #include <signal.h>
 #include <sys/wait.h>
+#include <sys/prctl.h>
 
 namespace cta { namespace tape { namespace  daemon {
 
@@ -245,6 +246,9 @@ int GarbageCollectorHandler::runChild() {
   // We do not have to care for previous crashed sessions as we will garbage
   // collect them like any other crashed agent.
   
+  // Set the thread name for process ID:
+  prctl(PR_SET_NAME, "cta-taped-gc");
+  
   // Before anything, we will check for access to the scheduler's central storage.
   // If we fail to access it, we cannot work. We expect the drive processes to
   // fail likewise, so we just wait for shutdown signal (no feedback to main

tapeserver/daemon/TapeDaemon.cpp

@@ -26,6 +26,7 @@
 #include "GarbageCollectorHandler.hpp"
 #include <google/protobuf/service.h>
 #include <limits.h>
+#include <sys/prctl.h>
 
 namespace cta { namespace tape { namespace daemon {
 
@@ -90,6 +91,8 @@ void  cta::tape::daemon::TapeDaemon::exceptionThrowingMain()  {
   // future
   setProcessCapabilities("cap_sys_rawio+p");
   
+  // Set the name of the (unique) thread for easy process identification.
+  prctl(PR_SET_NAME, "cta-taped-main");
   mainEventLoop();
 }