+/* A daemon doesn't normally have any use for the file descriptors for stdin,
+ * stdout, and stderr after it detaches. To keep these file descriptors from
+ * e.g. holding an SSH session open, by default detaching replaces each of
+ * these file descriptors by /dev/null. But a few daemons expect the user to
+ * redirect stdout or stderr to a file, in which case it is desirable to keep
+ * these file descriptors. This function, therefore, disables replacing 'fd'
+ * by /dev/null when the daemon detaches. */
+void
+daemon_save_fd(int fd)
+{
+ ovs_assert(fd == STDIN_FILENO ||
+ fd == STDOUT_FILENO ||
+ fd == STDERR_FILENO);
+ save_fds[fd] = true;
+}
+
+/* Unregisters pidfile from being unlinked when the program terminates via
+* exit() or a fatal signal. */
+void
+remove_pidfile_from_unlink(void)
+{
+ if (pidfile) {
+ fatal_signal_remove_file_to_unlink(pidfile);
+ }
+}
+
+/* Registers pidfile to be unlinked when the program terminates via exit() or a
+ * fatal signal. */
+void
+add_pidfile_to_unlink(void)
+{
+ if (pidfile) {
+ fatal_signal_add_file_to_unlink(pidfile);
+ }
+}
+