Added tape server binary and deamonisation.

CMakeLists.txt

@@ -69,9 +69,7 @@ add_subdirectory(System)
 add_subdirectory(Exception)
 add_subdirectory(Utils)
 add_subdirectory(File)
-# .. and then tools, tests, and daemon
-# add_subdirectory(tools)
-# add_subdirectory(deamon)
+add_subdirectory(Daemon)
 
 # .. and of course, the tests (last to use the variable definition)
 add_subdirectory(test)

Daemon/CMakeLists.txt

+add_executable(tapeserverd tapeserverd.cc)
+
+target_link_libraries(tapeserverd Exception SCSI System Utils File)
\ No newline at end of file

Daemon/tapeserverd.cc

+// ----------------------------------------------------------------------
+// File: Daemon/tapeserverd.cc
+// ----------------------------------------------------------------------
+
+/************************************************************************
+ * Tape Server                                                          *
+ * Copyright (C) 2013 CERN/Switzerland                                  *
+ *                                                                      *
+ * This program is free software: you can redistribute it and/or modify *
+ * it under the terms of the GNU General Public License as published by *
+ * the Free Software Foundation, either version 3 of the License, or    *
+ * (at your option) any later version.                                  *
+ *                                                                      *
+ * This program is distributed in the hope that it will be useful,      *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of       *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the        *
+ * GNU General Public License for more details.                         *
+ *                                                                      *
+ * You should have received a copy of the GNU General Public License    *
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.*
+ ************************************************************************/
+
+#include <iostream>
+#include <exception>
+#include <unistd.h>
+#include <stdlib.h>
+#include <getopt.h>
+#include <sys/stat.h>
+#include <sstream>
+
+#include "tapeserverd.hh"
+
+int main(int argc, char ** argv) {
+  try {
+    Tape::Server::Daemon daemon(argc, argv);
+  } catch (std::exception & e) {
+    std::cerr << "Uncaught standard exception in tapeserverd:" << std::endl
+        << e.what() << std::endl;
+    exit(EXIT_FAILURE);
+  } catch (...) {
+    std::cerr << "Uncaught non-standard exception in tapeserverd:" << std::endl;
+    exit(EXIT_FAILURE);
+  }
+}
+
+Tape::Server::Daemon::Daemon(int argc, char** argv) throw (Tape::Exception) {
+  m_options = getCommandLineOptions(argc, argv);
+  if (m_options.daemonize) daemonize();
+}
+
+Tape::Server::Daemon::options Tape::Server::Daemon::getCommandLineOptions(int argc, char** argv)
+throw (Tape::Exception)
+{
+  options ret;
+  /* Expect -f or --foreground */
+  struct ::option opts[] = {
+    { "foreground", no_argument, 0, 'f'},
+    { 0, 0, 0, 0}
+  };
+  int c;
+  while (-1 != (c = getopt_long(argc, argv, ":f", opts, NULL))) {
+    switch (c) {
+      case 'f':
+        ret.daemonize = false;
+        break;
+      case ':':
+      {
+        Tape::Exceptions::InvalidArgument ex(std::string("The -") + (char) optopt + " option requires a parameter");
+        throw ex;
+      }
+      case '?':
+      {
+        std::stringstream err("Unknown command-line option");
+        if (optopt) err << std::string(": -") << optopt;
+        Tape::Exceptions::InvalidArgument ex(err.str().c_str());
+        throw ex;
+      }
+      default:
+      {
+        std::stringstream err;
+        err << "getopt_long returned the following unknown value: 0x" <<
+            std::hex << (int) c;
+        Tape::Exceptions::InvalidArgument ex(err.str().c_str());
+        throw ex;
+      }
+    }
+  }
+  return ret;
+}
+
+void Tape::Server::Daemon::daemonize()
+{
+  pid_t pid, sid;
+
+  /* already a daemon */
+  if (getppid() == 1) return;
+
+  /* Fork off the parent process */
+  pid = fork();
+  if (pid < 0) {
+    Tape::Exceptions::Errnum e("Failed to fork in Tape::Server::Daemon::daemonize");
+    throw e;
+  }
+  /* If we got a good PID, then we can exit the parent process. */
+  if (pid > 0) {
+    exit(EXIT_SUCCESS);
+  }
+
+  /* Change the file mode mask */
+  umask(0);
+
+  /* Create a new session for the child process */
+  sid = setsid();
+  if (sid < 0) {
+    Tape::Exceptions::Errnum e("Failed to create new session in Tape::Server::Daemon::daemonize");
+    throw e;
+  }
+
+  /* At this point we are executing as the child process, and parent process should be init */
+  if (getppid() != 1) {
+    Tape::Exception e("Failed to detach from parent process in Tape::Server::Daemon::daemonize");
+    throw e;
+  }
+
+  /* Change the current working directory.  This prevents the current
+     directory from being locked; hence not being able to remove it. */
+  if ((chdir(m_options.runDirectory.c_str())) < 0) {
+    std::stringstream err("Failed to chdir in Tape::Server::Daemon::daemonize");
+    err << " ( destination directory: " << m_options.runDirectory << ")";
+    Tape::Exceptions::Errnum e(err.str());
+    throw e;
+  }
+
+  /* Redirect standard files to /dev/null */
+  freopen("/dev/null", "r", stdin);
+  freopen("/dev/null", "w", stdout);
+  freopen("/dev/null", "w", stderr);
+}

Daemon/tapeserverd.hh

+// ----------------------------------------------------------------------
+// File: Daemon/tapeserverd.hh
+// ----------------------------------------------------------------------
+
+/************************************************************************
+ * Tape Server                                                          *
+ * Copyright (C) 2013 CERN/Switzerland                                  *
+ *                                                                      *
+ * This program is free software: you can redistribute it and/or modify *
+ * it under the terms of the GNU General Public License as published by *
+ * the Free Software Foundation, either version 3 of the License, or    *
+ * (at your option) any later version.                                  *
+ *                                                                      *
+ * This program is distributed in the hope that it will be useful,      *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of       *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the        *
+ * GNU General Public License for more details.                         *
+ *                                                                      *
+ * You should have received a copy of the GNU General Public License    *
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.*
+ ************************************************************************/
+
+#pragma once
+#include "../Exception/Exception.hh"
+
+namespace Tape {
+  namespace Server {
+    class Daemon {
+    public:
+      Daemon (int argc, char ** argv) throw (Tape::Exception);
+      class options {
+      public:
+        options(): daemonize(true), runDirectory("/var/log/castor") {}
+        bool daemonize;
+        std::string runDirectory;
+      };
+    private:
+      options getCommandLineOptions(int argc, char ** argv) throw (Tape::Exception);
+      void daemonize();
+      options m_options;
+    };
+  }
+}       

Documentation/CMakeLists.txt

 ADD_LATEX_DOCUMENT(
 TapeServer.tex
 INPUTS ProgrammersManual.tex AdministratorsManual.tex
-IMAGE_DIRS images
+IMAGE_DIRS images 
 NO_DEFAULT USE_INDEX MANGLE_TARGET_NAMES)
 
 INSTALL(FILES TapeServer.pdf

Exception/Exception.hh

@@ -63,5 +63,9 @@ namespace Tape {
       int m_errnum;
       std::string m_strerror;
     };
+    
+    class InvalidArgument: public Tape::Exception {
+    public: InvalidArgument(std::string what = ""): Tape::Exception(what) {};
+    };
   }
 }