Hello all,
In attachment you can find an implementation of usleep. It was on the
todo list, but on my debian I couldn't find a trace of it. Although its
behavior can be mimiced by using the floating point-version of sleep
it's actually more simple to have it functioning as a separate toy
(usleep doesn't have the suffixes, nor the floating point input which
sleep has).
When sleeping voor one second and one microsecond it translates into the
following nanosleep call:
edb@lapedb:~/edb-stuff/toybox/toybox$ strace -e nanosleep ./toybox
usleep 1000001
nanosleep({1, 1000}, NULL) = 0
gr
E.
--
Elie De Brauwer
# HG changeset patch
# User Elie De Brauwer <[email protected]>
# Date 1345028034 -7200
# Node ID 131571cf708c03065d1f1f4417c0bea27b4bcae2
# Parent 3258d9233753139f94db8812778e3894337f3d19
Adding usleep
diff -r 3258d9233753 -r 131571cf708c toys/usleep.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/toys/usleep.c Wed Aug 15 12:53:54 2012 +0200
@@ -0,0 +1,32 @@
+/* vi: set sw=4 ts=4:
+ *
+ * usleep.c - Wait for a number of microseconds.
+ *
+ * Copyright 2012 Elie De Brauwer <[email protected]>
+ *
+ * No standard.
+
+USE_USLEEP(NEWTOY(usleep, "<1", TOYFLAG_BIN))
+
+config USLEEP
+ bool "usleep"
+ default y
+ help
+ usage: usleep MICROSECONDS
+
+ Pause for MICROSECONDS microseconds.
+
+*/
+
+#include "toys.h"
+
+void usleep_main(void)
+{
+ struct timespec tv;
+ long delay = atol(*toys.optargs);
+
+ tv.tv_sec = delay/1000000;
+ tv.tv_nsec = (delay%1000000) * 1000;
+ toys.exitval = !!nanosleep(&tv, NULL);
+
+}
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