added signal handler

1 files changed, 111 insertions, 0 deletions

diff --git a/src/sig_handler.c b/src/sig_handler.c
new file mode 100644
index 0000000..e2afb17
--- /dev/null
+++ b/src/sig_handler.c
@@ -0,0 +1,111 @@
+/*
+ *  rharchive
+ *
+ *  rharchive is a simple tcp connection proxy which combines the 
+ *  features of rinetd and 6tunnel. rharchive supports IPv4 and 
+ *  IPv6 and also supports connections from IPv6 to IPv4 
+ *  endpoints and vice versa.
+ *  
+ *
+ *  Copyright (C) 2010-2011 Christian Pointner <equinox@helsinki.at>
+ *                         
+ *  This file is part of rharchive.
+ *
+ *  rharchive 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
+ *  any later version.
+ *
+ *  rharchive 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 rharchive. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "datatypes.h"
+
+#include "log.h"
+
+#include "sig_handler.h"
+
+#include <glib.h>
+#include <errno.h>
+
+static GThread *signal_thread;
+
+void signal_init()
+{
+  sigset_t signal_set;
+
+  sigemptyset(&signal_set);
+  sigaddset(&signal_set, SIGINT);
+  sigaddset(&signal_set, SIGQUIT);
+  sigaddset(&signal_set, SIGHUP);
+  sigaddset(&signal_set, SIGTERM);
+  sigaddset(&signal_set, SIGUSR1);
+  sigaddset(&signal_set, SIGUSR2);
+
+  pthread_sigmask(SIG_BLOCK, &signal_set, NULL);
+}
+
+static gpointer signal_thread_func(gpointer data)
+{
+  GMainLoop *loop = (GMainLoop *)data;
+
+  struct timespec timeout;
+  sigset_t signal_set;
+  int sig_num;
+  for(;;) {
+    sigemptyset(&signal_set);
+    sigaddset(&signal_set, SIGINT);
+    sigaddset(&signal_set, SIGQUIT);
+    sigaddset(&signal_set, SIGHUP);
+    sigaddset(&signal_set, SIGTERM);
+    sigaddset(&signal_set, SIGUSR1);
+    sigaddset(&signal_set, SIGUSR2);
+    timeout.tv_sec = 1;
+    timeout.tv_nsec = 0;
+    sig_num = sigtimedwait(&signal_set, NULL, &timeout);
+    if(sig_num == -1) {
+      if(errno != EINTR && errno != EAGAIN) {
+        log_printf(ERROR, "sigwait failed with error: %d, signal handling will be disabled", errno);
+        break;
+      }
+    } else {
+        switch(sig_num) {
+        case SIGTERM:
+        case SIGINT:
+        case SIGQUIT: {
+          log_printf(NOTICE, "signal %d received, exiting", sig_num);
+          g_main_loop_quit(loop);
+          break;
+        }
+        default: {
+          log_printf(NOTICE, "signal %d received, ignoring", sig_num);
+          break;
+        }
+      }
+    }
+  }
+	
+	return NULL;
+}
+
+int signal_start(GMainLoop *loop)
+{
+	g_assert(!signal_thread);
+
+	signal_thread = g_thread_create_full(signal_thread_func, loop, 8192,TRUE, TRUE, G_THREAD_PRIORITY_HIGH,	NULL);
+	if(!signal_thread)
+		return -1;
+	
+  return 0;
+}
+
+void signal_stop()
+{
+      // nothing yet..
+}