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

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This commit is contained in:
Roland McGrath
2013-08-27 10:50:06 -07:00
parent f890a59b10
commit c4e42566cf
2 changed files with 6 additions and 1 deletions
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5
resolv/res_send.c
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@ -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;