From f6ab153e73e93c1b5e29790c3ad62c35330cee5e Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?St=C3=A9phane=20Aulery?= Date: Wed, 22 Apr 2015 02:21:11 +0200 Subject: [PATCH] resolv.conf.5: Document RES_SNGLKUPREOP MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Fix Ubuntu bug #1110781: https://bugs.launchpad.net/ubuntu/+source/manpages/+bug/1110781 This bug have been partially resolved by commit aa87a3f3f8c74fc1f5cb614f6e63aea34fe1a459 and tagged fixed-upstream by Simon Paillard for Debian bug #699387. The Ubuntu bug #1110781 report is more comprehensive and passing I saw that RES_SNGLKUPREOP was missed. Reported-by: Thomas Hood Signed-off-by: Stéphane Aulery Signed-off-by: Michael Kerrisk --- man5/resolv.conf.5 | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/man5/resolv.conf.5 b/man5/resolv.conf.5 index 8f1b2bc79..d5318f3d8 100644 --- a/man5/resolv.conf.5 +++ b/man5/resolv.conf.5 @@ -255,6 +255,10 @@ and IPv4 requests sequentially (at the cost of some slowdown of the resolving process). .TP .BR single-request-reopen " (since glibc 2.9)" +sets +.BR RES_SNGLKUPREOP +in +.IR _res.options . The resolver uses the same socket for the A and AAAA requests. Some hardware mistakenly sends back only one reply. When that happens the client system will sit and wait for the second reply.