From: Roland McGrath <roland@hack.frob.com>
Date: Tue, 27 Aug 2013 17:50:06 +0000 (-0700)
Subject: Don't try to use ioctl unless [FIONREAD].
X-Git-Tag: glibc-2.19~868
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c4e42566cfecc43f9ef3ddf9c7af57c6744e2ceb;p=thirdparty%2Fglibc.git

Don't try to use ioctl unless [FIONREAD].
---

diff --git a/ChangeLog b/ChangeLog
index 30d90e089a8..8ae49793351 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,7 @@
 2013-08-27  Roland McGrath  <roland@hack.frob.com>
 
+	* resolv/res_send.c (send_dg): Don't try to use ioctl unless [FIONREAD].
+
 	* resolv/res_hconf.c [!NOT_IN_libc] (ifaddrs): Declare
 	only under [SIOCGIFCONF && SIOCGIFNETMASK].
 
diff --git a/resolv/res_send.c b/resolv/res_send.c
index 140efbef7b5..5a73696e555 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;