patch from tito: consolidate delay functions as bb_do_delay()

libbb/Makefile.in

@@ -34,7 +34,7 @@ LIBBB_SRC-y:= \
 	getopt_ulflags.c default_error_retval.c wfopen_input.c speed_table.c \
 	perror_nomsg_and_die.c perror_nomsg.c skip_whitespace.c bb_askpass.c \
 	warn_ignoring_args.c concat_subpath_file.c vfork_daemon_rexec.c \
-	bb_echo.c
+	bb_echo.c bb_do_delay.c
 
 LIBBB_SRC-$(CONFIG_FEATURE_SHADOWPASSWDS)+= pwd2spwd.c
 

libbb/bb_do_delay.c

@@ -0,0 +1,31 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Busybox utility routines.
+ *
+ * Copyright (C) 2005 by Tito Ragusa <tito-wolit@tiscali.it>
+ *
+ * Licensed under the GPL v2, see the file LICENSE in this tarball.
+ */
+
+#include <time.h>
+#include <unistd.h>
+
+void bb_do_delay(int seconds)
+{
+	time_t start, now;
+
+	time(&start);
+	now = start;
+	while (difftime(now, start) < seconds) {
+		sleep(seconds);
+		time(&now);
+	}
+}
+
+/*
+Local Variables:
+c-file-style: "linux"
+c-basic-offset: 4
+tab-width: 4
+End:
+*/