From b973ba4db6b82f446b2c28c3ac563f55a2c047e6 Mon Sep 17 00:00:00 2001
From: Remi Gacogne <remi.gacogne@powerdns.com>
Date: Wed, 29 May 2019 16:05:25 +0200
Subject: [PATCH] Don't close the random device on EINTR

---
 pdns/dns_random.cc | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/pdns/dns_random.cc b/pdns/dns_random.cc
index e2b8e45754..48b910c8f4 100644
--- a/pdns/dns_random.cc
+++ b/pdns/dns_random.cc
@@ -285,6 +285,10 @@ uint32_t dns_random(uint32_t upper_bound) {
       do {
         ssize_t got = read(urandom_fd, &num, sizeof(num));
         if (got < 0) {
+          if (errno == EINTR) {
+            continue;
+          }
+
           (void)close(urandom_fd);
           throw std::runtime_error("Cannot read random device");
         }
-- 
2.47.2