From a5f1d6734b7a1aafa818405c9bc56460dd412b4d Mon Sep 17 00:00:00 2001
From: Michael Ortmann <41313082+michaelortmann@users.noreply.github.com>
Date: Sun, 1 Dec 2024 17:17:09 +0100
Subject: [PATCH] Fix format-truncation warning

Found by: Geo
Patch by: michaelortmann
---
 src/dns.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/dns.c b/src/dns.c
index 863d40c33..a47f53bcf 100644
--- a/src/dns.c
+++ b/src/dns.c
@@ -565,7 +565,8 @@ 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));
+    /* print raw errno, dont use strerror() in thread and dont use strerror_r() due to GNU / POSIX portability complexity */
+    snprintf(dtn->strerror, sizeof dtn->strerror, "dns: thread_dns_ipbyhost(): getaddrinfo(): %s: errno %i", gai_strerror(error), errno);
   } else
     snprintf(dtn->strerror, sizeof dtn->strerror, "dns: thread_dns_ipbyhost(): getaddrinfo(): %s", gai_strerror(error));
   close(dtn->fildes[1]);