Imported Upstream version 1.0.0upstream/1.0.0

1 files changed, 62 insertions, 0 deletions

diff --git a/src/nm-posix-signals.c b/src/nm-posix-signals.c
new file mode 100644
index 000000000..22fed8310
--- /dev/null
+++ b/src/nm-posix-signals.c
@@ -0,0 +1,62 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
+/* NetworkManager -- Network link manager
+ *
+ * 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 2 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, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Copyright (C) 2012 Red Hat, Inc.
+ */
+
+#include "config.h"
+
+#include <signal.h>
+
+#include "nm-posix-signals.h"
+
+
+/* Stores the original signal mask of NetworkManager process */
+static sigset_t nm_original_signal_mask;
+
+void
+nm_save_original_signal_mask (sigset_t sig_mask)
+{
+	nm_original_signal_mask = sig_mask;
+}
+
+const sigset_t *
+nm_get_original_signal_mask (void)
+{
+	return &nm_original_signal_mask;
+}
+
+/* 
+ * Unblock signals.
+ * If a signal set is passed, those signals are unblocked. If user_data is NULL
+ * the process' signal mask is set to the saved original mask.
+ * Note: This function can be used in g_spawn_* as GSpawnChildSetupFunc()
+ *       callback.
+ */
+void
+nm_unblock_posix_signals (gpointer user_data)
+{
+	sigset_t *user_sigset = (sigset_t *) user_data;
+
+	if (user_sigset != NULL) {
+		pthread_sigmask (SIG_UNBLOCK, user_sigset, NULL);
+	} else {
+		const sigset_t *orig_sig_mask = nm_get_original_signal_mask ();
+		pthread_sigmask (SIG_SETMASK, orig_sig_mask, NULL);
+	}
+}
+