From c4e42566cfecc43f9ef3ddf9c7af57c6744e2ceb Mon Sep 17 00:00:00 2001
From: Roland McGrath <roland@hack.frob.com>
Date: Tue, 27 Aug 2013 10:50:06 -0700
Subject: Don't try to use ioctl unless [FIONREAD].

---
 resolv/res_send.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'resolv')

diff --git a/resolv/res_send.c b/resolv/res_send.c
index 140efbe..5a73696 100644
--- a/resolv/res_send.c
+++ b/resolv/res_send.c
@@ -1229,8 +1229,11 @@ send_dg(res_state statp,
 		    /* Yes, we test ANSCP here.  If we have two buffers
 		       both will be allocatable.  */
 		    && anscp
+#ifdef FIONREAD
 		    && (ioctl (pfd[0].fd, FIONREAD, thisresplenp) < 0
-			|| *thisanssizp < *thisresplenp)) {
+			|| *thisanssizp < *thisresplenp)
+#endif
+                    ) {
 			u_char *newp = malloc (MAXPACKET);
 			if (newp != NULL) {
 				*anssizp = MAXPACKET;
-- 
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