From cc9d637652875020e1a26874f15ff362938aa9e0 Mon Sep 17 00:00:00 2001
From: Nathanael Sensfelder <SpamShield0@MultiAgentSystems.org>
Date: Sun, 16 Jul 2017 17:34:05 +0200
Subject: Signal handling, code improvements.

---
 src/signal.c | 91 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 91 insertions(+)
 create mode 100644 src/signal.c

(limited to 'src/signal.c')

diff --git a/src/signal.c b/src/signal.c
new file mode 100644
index 0000000..eb9584e
--- /dev/null
+++ b/src/signal.c
@@ -0,0 +1,91 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <signal.h>
+#include <errno.h>
+
+#include "error/error.h"
+
+#include "pervasive.h"
+
+#include "./cli.h"
+
+static volatile char JH_GATEWAY_IS_RUNNING = (char) 1;
+
+static void request_termination (int const signo)
+{
+   if ((signo == SIGINT) || (signo == SIGTERM))
+   {
+      JH_GATEWAY_IS_RUNNING = (char) 0;
+   }
+}
+
+int JH_cli_is_running (void)
+{
+   return (int) JH_GATEWAY_IS_RUNNING;
+}
+
+int JH_cli_set_signal_handlers (void)
+{
+   struct sigaction act;
+   const int old_errno = errno;
+
+   memset((void *) &act, 0, sizeof(struct sigaction));
+
+   act.sa_handler = request_termination;
+
+   errno = 0;
+
+   if (sigaction(SIGHUP, &act, (struct sigaction * restrict) NULL) == -1)
+   {
+      JH_FATAL
+      (
+         stderr,
+         "Could not set sigaction for SIGHUP (errno: %d): %s",
+         errno,
+         strerror(errno)
+      );
+
+      errno = old_errno;
+
+      return -1;
+   }
+
+   errno = 0;
+
+   if (sigaction(SIGINT, &act, (struct sigaction * restrict) NULL) == -1)
+   {
+      JH_FATAL
+      (
+         stderr,
+         "Could not set sigaction for SIGINT (errno: %d): %s",
+         errno,
+         strerror(errno)
+      );
+
+      errno = old_errno;
+
+      return -1;
+   }
+
+   act.sa_handler = SIG_IGN;
+
+   if (sigaction(SIGPIPE, &act, (struct sigaction * restrict) NULL) == -1)
+   {
+      JH_FATAL
+      (
+         stderr,
+         "Could not set sigaction for SIGPIPE (errno: %d): %s",
+         errno,
+         strerror(errno)
+      );
+
+      errno = old_errno;
+
+      return -1;
+   }
+
+   errno = old_errno;
+
+   return 0;
+}
-- 
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