5.2: Signals | POSIX signals example done

Author: mgroot

5_Processes_Signals_Files_Pipes/2_Signals/2_POSIX.cpp

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+#include <iostream>
+#include <signal.h>
+#include <unistd.h>
+
+int*  global_to_free;
+
+
+void  cleanup_handler(int status)
+{
+  std::cout << "\n{HANDLER WAS CALLED}\n" << std::endl;
+  delete[] global_to_free;
+}
+
+
+void  configure_signal()
+{
+  // set up sigset (block all)
+  sigset_t  sigset;
+  sigemptyset(&sigset);
+  
+  // set
+  struct sigaction act;
+  act.sa_mask = sigset;
+  act.sa_flags = SA_RESETHAND | SA_RESTART; // avoid double free + continue pause
+  act.__sigaction_u.__sa_handler = cleanup_handler;
+
+  sigaction(SIGINT, &act, NULL);
+}
+
+
+int   main()
+{
+  global_to_free = new int[1024];
+
+  configure_signal();
+
+  std::cout << "Waiting for ^C..." << std::endl;
+  pause();
+  
+  std::cout << "Exiting programm..." << std::endl;
+  return 0;
+}