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resolv.conf.5: Document RES_SNGLKUPREOP 

Fix Ubuntu bug #1110781:
https://bugs.launchpad.net/ubuntu/+source/manpages/+bug/1110781
This bug have been partially resolved by commit
aa87a3f3f8 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 <jdthood@gmail.com>
Signed-off-by: Stéphane Aulery <saulery@free.fr>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Stéphane Aulery 2015-04-22 02:21:11 +02:00 committed by Michael Kerrisk
parent 174dfad254
commit f6ab153e73
1 changed files with 4 additions and 0 deletions
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4
man5/resolv.conf.5
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@ -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.