From 2af9351db3aa97da9b0d3f23d53a593bc96c8a8e Mon Sep 17 00:00:00 2001
From: Jaron Kent-Dobias <jaron@kent-dobias.com>
Date: Fri, 2 Feb 2018 18:33:22 -0500
Subject: does potts now, no external libraries

---
 lib/rand.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)
 create mode 100644 lib/rand.c

(limited to 'lib/rand.c')

diff --git a/lib/rand.c b/lib/rand.c
new file mode 100644
index 0000000..76f537d
--- /dev/null
+++ b/lib/rand.c
@@ -0,0 +1,20 @@
+
+#include <assert.h>
+#include <stdio.h>
+
+unsigned long int rand_seed() {
+  /*
+    returns a random unsigned long integer read from the standard unix
+    pseudorandom device /dev/urandom
+  */
+
+  FILE *f = fopen("/dev/urandom", "r");
+  assert(f != NULL);
+
+  unsigned long int seed;
+  fread(&seed, sizeof(unsigned long int), 1, f);
+
+  fclose(f);
+
+  return seed;
+}
-- 
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