1 files changed, 63 insertions, 0 deletions
diff --git a/src/util/myrand.c b/src/util/myrand.c
new file mode 100644
index 0000000..39fcbfd
--- /dev/null
+++ b/src/util/myrand.c
@@ -0,0 +1,63 @@
+/*++
+/* NAME
+/*	myrand 3
+/* SUMMARY
+/*	rand wrapper
+/* SYNOPSIS
+/*	#include <myrand.h>
+/*
+/*	void	mysrand(seed)
+/*	int	seed;
+/*
+/*	int	myrand()
+/* DESCRIPTION
+/*	This module implements a wrapper for the portable, pseudo-random
+/*	number generator. The wrapper adds automatic initialization.
+/*
+/*	mysrand() performs initialization. This call may be skipped.
+/*
+/*	myrand() returns a pseudo-random number in the range [0, RAND_MAX].
+/*	If mysrand() was not called, it is invoked with the process ID
+/*	ex-or-ed with the time of day in seconds.
+/* LICENSE
+/* .ad
+/* .fi
+/*	The Secure Mailer license must be distributed with this software.
+/* WARNING
+/*	Do not use this code for generating unpredictable numbers.
+/* 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 <stdlib.h>
+#include <unistd.h>
+#include <time.h>
+
+/* Utility library. */
+
+#include <myrand.h>
+
+static int myrand_initdone = 0;
+
+/* mysrand - initialize */
+
+void    mysrand(int seed)
+{
+    srand(seed);
+    myrand_initdone = 1;
+}
+
+/* myrand - pseudo-random number */
+
+int     myrand(void)
+{
+    if (myrand_initdone == 0)
+	mysrand(getpid() ^ time((time_t *) 0));
+    return (rand());
+}