From af0afc08b419687645634640c2ef647b694c6223 Mon Sep 17 00:00:00 2001
From: Michael Ortmann <41313082+michaelortmann@users.noreply.github.com>
Date: Mon, 17 Jun 2024 01:21:27 +0200
Subject: [PATCH] tdns: strerror() -> strerror_r()

---
 src/dns.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/src/dns.c b/src/dns.c
index 69b3a03e5..32bc53849 100644
--- a/src/dns.c
+++ b/src/dns.c
@@ -563,9 +563,12 @@ void *thread_dns_ipbyhost(void *arg)
   }
   else if (error == EAI_NONAME)
     snprintf(dtn->strerror, sizeof dtn->strerror, "dns: thread_dns_ipbyhost(): getaddrinfo(): not known");
-  else if (error == EAI_SYSTEM)
-    snprintf(dtn->strerror, sizeof dtn->strerror, "dns: thread_dns_ipbyhost(): getaddrinfo(): %s: %s", gai_strerror(error), strerror(errno));
-  else
+  else if (error == EAI_SYSTEM) {
+    char ebuf[2048];
+    if (strerror_r(errno, ebuf, sizeof ebuf))
+      strcpy(ebuf, "strerror_r()");
+    snprintf(dtn->strerror, sizeof dtn->strerror, "dns: thread_dns_ipbyhost(): getaddrinfo(): %s: %s", gai_strerror(error), ebuf);
+  } else
     snprintf(dtn->strerror, sizeof dtn->strerror, "dns: thread_dns_ipbyhost(): getaddrinfo(): %s", gai_strerror(error));
   pthread_mutex_lock(&dtn->mutex);
   close(dtn->fildes[1]);