Import from old repository commit 61ef2b42a9c4ba8e1600f15bb0236765edc2ad45.

lib/fatal-signal.h

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+/*
+ * Copyright (c) 2008 Nicira Networks.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef FATAL_SIGNAL_H
+#define FATAL_SIGNAL_H 1
+
+#include <stdbool.h>
+
+/* Basic interface. */
+void fatal_signal_add_hook(void (*)(void *aux), void *aux, bool run_at_exit);
+void fatal_signal_block(void);
+void fatal_signal_unblock(void);
+void fatal_signal_fork(void);
+
+/* Convenience functions for unlinking files upon termination.
+ *
+ * These functions also unlink the files upon normal process termination via
+ * exit(). */
+void fatal_signal_add_file_to_unlink(const char *);
+void fatal_signal_remove_file_to_unlink(const char *);
+
+/* Interface for other code that catches one of our signals and needs to pass
+ * it through. */
+void fatal_signal_handler(int sig_nr);
+
+#endif /* fatal-signal.h */