1 files changed, 71 insertions, 0 deletions
diff --git a/src/util/doze.c b/src/util/doze.c
new file mode 100644
index 0000000..28d5669
--- /dev/null
+++ b/src/util/doze.c
@@ -0,0 +1,71 @@
+/*++
+/* NAME
+/*	doze 3
+/* SUMMARY
+/*	take a nap
+/* SYNOPSIS
+/*	#include <iostuff.h>
+/*
+/*	void	doze(microseconds)
+/*	unsigned microseconds;
+/* DESCRIPTION
+/*	doze() sleeps for the specified number of microseconds. It is
+/*	a simple alternative for systems that lack usleep().
+/* DIAGNOSTICS
+/*	All errors are fatal.
+/* LICENSE
+/* .ad
+/* .fi
+/*	The Secure Mailer license must be distributed with this software.
+/* AUTHOR(S)
+/*	Wietse Venema
+/*	IBM T.J. Watson Research
+/*	P.O. Box 704
+/*	Yorktown Heights, NY 10598, USA
+/*--*/
+
+/* System library. */
+
+#include "sys_defs.h"
+#include <sys/time.h>
+#include <unistd.h>
+#include <errno.h>
+#ifdef USE_SYS_SELECT_H
+#include <sys/select.h>
+#endif
+
+/* Utility library. */
+
+#include <msg.h>
+#include <iostuff.h>
+
+/* doze - sleep a while */
+
+void    doze(unsigned delay)
+{
+    struct timeval tv;
+
+#define MILLION	1000000
+
+    tv.tv_sec = delay / MILLION;
+    tv.tv_usec = delay % MILLION;
+    while (select(0, (fd_set *) 0, (fd_set *) 0, (fd_set *) 0, &tv) < 0)
+	if (errno != EINTR)
+	    msg_fatal("doze: select: %m");
+}
+
+#ifdef TEST
+
+#include <stdlib.h>
+
+int     main(int argc, char **argv)
+{
+    unsigned delay;
+
+    if (argc != 2 || (delay = atol(argv[1])) == 0)
+	msg_fatal("usage: %s microseconds", argv[0]);
+    doze(delay);
+    exit(0);
+}
+
+#endif