tdns: strerror() -> strerror_r()

Author: michaelortmann

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]);