From be16142ea52d488333b4f41e1f1c93c0a4cb56ed Mon Sep 17 00:00:00 2001
From: =?utf8?q?Ond=C5=99ej=20Sur=C3=BD?= <ondrej@sury.org>
Date: Wed, 23 May 2018 18:26:47 +0200
Subject: [PATCH] Provide debugging information for the isc_random function

---
 lib/isc/random.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/isc/random.c b/lib/isc/random.c
index 08df74a32f2..a6af0815af7 100644
--- a/lib/isc/random.c
+++ b/lib/isc/random.c
@@ -30,6 +30,7 @@
 
 #include <config.h>
 
+#include <stdio.h>
 #include <stdint.h>
 #include <stdlib.h>
 #include <unistd.h>
@@ -96,6 +97,7 @@ getrandom_buf(void *buf, size_t buflen) {
 	while (left > 0) {
 		ret = getrandom(p, left, 0);
 		if (ret == -1 && errno == EINTR) {
+			fprintf(stderr, "getrandom_buf: getrandom() call interrupted.\n");
 			continue;
 		}
 
@@ -105,6 +107,9 @@ getrandom_buf(void *buf, size_t buflen) {
 			left -= ret;
 			p += ret;
 		}
+		if (left > 0) {
+			fprintf(stderr, "getrandom_buf: getrandom() returned less then requested bytes (%zd < %zu).\n", ret, left+ret);
+		}
 	}
 
 	return(0);
-- 
2.47.3