From 0005d2e5633b67afddcd1b0be3647c74526e8be1 Mon Sep 17 00:00:00 2001
From: Tom Cort <tom.cort@state.vt.us>
Date: Mon, 26 Nov 2007 23:56:11 -0500
Subject: [PATCH] Single Handler Functions

This module contains some functions to install and handle signals.
---
 sig.c | 65 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 sig.h | 43 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 108 insertions(+)
 create mode 100644 sig.c
 create mode 100644 sig.h

diff --git a/sig.c b/sig.c
new file mode 100644
index 0000000..46aa1f0
--- /dev/null
+++ b/sig.c
@@ -0,0 +1,65 @@
+/*
+ * inoclam - Inotify+ClamAV virus scanner
+ * Copyright (C) 2007 Vermont Department of Taxes
+ *
+ * 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/>.
+ *
+ * Contributor(s):
+ *   Tom Cort <tom.cort@state.vt.us>
+ */
+
+#include <signal.h>
+
+#include "sig.h"
+
+/**
+ * Signal handler for SIGKILL, SIGQUIT, SIGINT.
+ * Raises a SIGUSR1 signal to tell nanohttp to stop.
+ * @param sig signal to handle.
+ */
+void handle_signal(int sig)
+{
+	switch (sig) {
+	case SIGKILL:
+		exit_now = 1;
+		raise(SIGUSR1);
+		break;
+	case SIGQUIT:
+		exit_now = 1;
+		raise(SIGUSR1);
+		break;
+	case SIGINT:
+		exit_now = 1;
+		raise(SIGUSR1);
+		break;
+	}
+}
+
+/**
+ *  installs signal handlers (mostly SIG_IGN)
+ */
+void install_signal_handlers()
+{
+	int i;
+
+	for (i = 0; i < 32; i++) {
+		if (i != SIGCHLD && i != SIGQUIT && i != SIGINT && i != SIGKILL) {
+			signal(i, SIG_IGN);
+		}
+	}
+
+	signal(SIGKILL, handle_signal);
+	signal(SIGINT, handle_signal);
+	signal(SIGQUIT, handle_signal);
+}
diff --git a/sig.h b/sig.h
new file mode 100644
index 0000000..2b2fc67
--- /dev/null
+++ b/sig.h
@@ -0,0 +1,43 @@
+/*
+ * inoclam - Inotify+ClamAV virus scanner
+ * Copyright (C) 2007 Vermont Department of Taxes
+ *
+ * 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/>.
+ *
+ * Contributor(s):
+ *   Tom Cort <tom.cort@state.vt.us>
+ */
+
+#ifndef __SIGNAL_H
+#define __SIGNAL_H
+
+/**
+ * Signal handler for SIGKILL, SIGQUIT, SIGINT.
+ * Raises a SIGUSR1 signal to tell nanohttp to stop.
+ * @param sig signal to handle
+ */
+void handle_signal(int sig);
+
+/**
+ *  installs signal handlers (mostly SIG_IGN)
+ */
+void install_signal_handlers();
+
+/**
+ * Global variable used to determine if the program should halt. Will it ever halt? Only Alan Turing knows.
+ * @see handle_signal()
+ */
+int exit_now;
+
+#endif
-- 
2.11.4.GIT