text: /**
   * FreeRDP: A Remote Desktop Protocol Implementation
   * Signal handling
   *
   * Copyright 2011 Shea Levy <shea@shealevy.com>
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  #ifdef HAVE_CONFIG_H
  #include "config.h"
  #endif
  
  #include <stddef.h>
  #include <errno.h>
  
  #include <winpr/crt.h>
  
  #include <freerdp/utils/signal.h>
  #include <freerdp/log.h>
  
  #define TAG FREERDP_TAG("utils")
  
  #ifdef _WIN32
  
  int freerdp_handle_signals(void)
  {
  	errno = ENOSYS;
  	return -1;
  }
  
  #else
  
  #include <pthread.h>
  
  volatile sig_atomic_t terminal_needs_reset = 0;
  int terminal_fildes = 0;
  struct termios orig_flags;
  struct termios new_flags;
  
  static void fatal_handler(int signum)
  {
  	struct sigaction default_sigaction;
  	sigset_t this_mask;
  	WLog_DBG(TAG, "fatal_handler: signum=%d", signum);
  
  	if (terminal_needs_reset)
  		tcsetattr(terminal_fildes, TCSAFLUSH, &orig_flags);
  
  	default_sigaction.sa_handler = SIG_DFL;
  	sigfillset(&(default_sigaction.sa_mask));
  	default_sigaction.sa_flags = 0;
  	sigaction(signum, &default_sigaction, NULL);
  	sigemptyset(&this_mask);
  	sigaddset(&this_mask, signum);
  	pthread_sigmask(SIG_UNBLOCK, &this_mask, NULL);
  	raise(signum);
  }
  
  const int fatal_signals[] =
  {
  	SIGABRT,
  	SIGALRM,
  	SIGBUS,
  	SIGFPE,
  	SIGHUP,
  	SIGILL,
  	SIGINT,
  	SIGKILL,
  	SIGQUIT,
  	SIGSEGV,
  	SIGSTOP,
  	SIGTERM,
  	SIGTSTP,
  	SIGTTIN,
  	SIGTTOU,
  	SIGUSR1,
  	SIGUSR2,
  #ifdef SIGPOLL
  	SIGPOLL,
  #endif
  #ifdef SIGPROF
  	SIGPROF,
  #endif
  #ifdef SIGSYS
  	SIGSYS,
  #endif
  	SIGTRAP,
  #ifdef SIGVTALRM
  	SIGVTALRM,
  #endif
  	SIGXCPU,
  	SIGXFSZ
  };
  
  int freerdp_handle_signals(void)
  {
  	int signal_index;
  	sigset_t orig_set;
  	struct sigaction orig_sigaction;
  	struct sigaction fatal_sigaction;
  	WLog_INFO(TAG, "Registering signal hook...");
  	sigfillset(&(fatal_sigaction.sa_mask));
  	sigdelset(&(fatal_sigaction.sa_mask), SIGCONT);
  	pthread_sigmask(SIG_BLOCK, &(fatal_sigaction.sa_mask), &orig_set);
  	fatal_sigaction.sa_handler = fatal_handler;
  	fatal_sigaction.sa_flags  = 0;
  
  	for (signal_index = 0; signal_index < ARRAYSIZE(fatal_signals); signal_index++)
  	{
  		if (sigaction(fatal_signals[signal_index], NULL, &orig_sigaction) == 0)
  		{
  			if (orig_sigaction.sa_handler != SIG_IGN)
  			{
  				sigaction(fatal_signals[signal_index], &fatal_sigaction, NULL);
  			}
  		}
  	}
  
  	pthread_sigmask(SIG_SETMASK, &orig_set, NULL);
  	/* Ignore SIGPIPE signal. */
  	signal(SIGPIPE, SIG_IGN);
  	return 0;
  }
  
  #endif
  