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authorRoland McGrath <roland@hack.frob.com>2013-08-27 10:50:06 -0700
committerRoland McGrath <roland@hack.frob.com>2013-08-27 10:50:06 -0700
commitc4e42566cfecc43f9ef3ddf9c7af57c6744e2ceb (patch)
tree8f64b2f0dc0b48460efff3bf6fbf2beeea64ce91 /resolv
parentf890a59b10b6a4b8723b86545e8b38ccc690021c (diff)
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Don't try to use ioctl unless [FIONREAD].
Diffstat (limited to 'resolv')
-rw-r--r--resolv/res_send.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/resolv/res_send.c b/resolv/res_send.c
index 140efbef7b..5a73696e55 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;