* /etc/resolv.conf caching bug fixed in glibc
@ 2017-08-03 15:33 Jack O'Connor
2017-08-07 5:55 ` Sebastian Huber
0 siblings, 1 reply; 2+ messages in thread
From: Jack O'Connor @ 2017-08-03 15:33 UTC (permalink / raw)
To: newlib
Glibc just released version 2.26, with the following note under "major
new features":
> The GNU C Library will now detect when /etc/resolv.conf has been modified and reload the changed configuration.
That refers to this bug: https://sourceware.org/bugzilla/show_bug.cgi?id=984
And this patch:
https://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=aef16cc8a4c670036d45590877d411a97f01e0cd;hp=a1c4eb8794e789b5055d7ceb13b2b3231abf5e26
I had hit this bug in the past
(https://github.com/golang/go/issues/21083), and I was eyeballing
other libc implementations to see if they might have the same problem.
It looks like Newlib might? But this was my first time looking at the
source, and I wanted to ask the experts :)
- Jack
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: /etc/resolv.conf caching bug fixed in glibc
2017-08-03 15:33 /etc/resolv.conf caching bug fixed in glibc Jack O'Connor
@ 2017-08-07 5:55 ` Sebastian Huber
0 siblings, 0 replies; 2+ messages in thread
From: Sebastian Huber @ 2017-08-07 5:55 UTC (permalink / raw)
To: Jack O'Connor, newlib
Hello Jack,
On 03/08/17 17:33, Jack O'Connor wrote:
> Glibc just released version 2.26, with the following note under "major
> new features":
>
>> The GNU C Library will now detect when /etc/resolv.conf has been modified and reload the changed configuration.
Newlib has no networks stack included. It is usually provided by the
operating systems that use Newlib. On RTEMS for example we use the
FreeBSD network stack. The FreeBSD resolver checks the
"/etc/resolv.conf" at most every two seconds (configurable). See
https://github.com/freebsd/freebsd/blob/master/lib/libc/resolv/res_state.c#L67
--
Sebastian Huber, embedded brains GmbH
Address : Dornierstr. 4, D-82178 Puchheim, Germany
Phone : +49 89 189 47 41-16
Fax : +49 89 189 47 41-09
E-Mail : sebastian.huber@embedded-brains.de
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Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG.
^ permalink raw reply [flat|nested] 2+ messages in thread
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