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Re: [PATCH] [hurd] pflocal/socket.c: Support MSG_DONTWAIT in pflocal sen

From: Justus Winter
Subject: Re: [PATCH] [hurd] pflocal/socket.c: Support MSG_DONTWAIT in pflocal send/recv
Date: Mon, 08 Aug 2016 12:18:08 +0200
User-agent: Notmuch/0.22+51~gcc1a6d2 (https://notmuchmail.org) Emacs/24.5.1 (x86_64-pc-linux-gnu)

Christian Seiler <christian@iwakd.de> writes:

> (The following is not really important, rebooting does
> work, so it's not a showstopper.)
> On 08/07/2016 09:13 PM, Richard Braun wrote:
>> On Sun, Aug 07, 2016 at 08:44:56PM +0300, Esa Peuha wrote:
>>>> PS: Is there any way to sanely restart /hurd/pflocal without
>>>> rebooting?
>>> Yes, the commands to do that are
>>> settrans -ck /servers/socket/1
>>> settrans -ck /servers/socket/1 /hurd/pflocal
> FYI: that's really weird: the translater appears to be
> replaced on my system (up to date Debian sid), but from
> the response of programs, the old one still appears to
> be used.

Yes, that's what the -k is for, it keeps the old translator running.
Also, without specifying -a, settrans only stores the translator record,
which does not change.  -c creates the node, which already exists.  All
in all this was just bad advice.

>> Use the remap translator instead, which is one of the things the Hurd
>> design allows you to do easily.
>> See /bin/remap to easily set one.
> remap doesn't work at all here, programs then complain
> that they can't assign requested address when doing any
> socket operation.

Seems to work fine here:

teythoon@hurdbox ~ % cd /tmp
teythoon@hurdbox /tmp % settrans -ac 1 /hurd/pflocal
teythoon@hurdbox /tmp % remap /servers/socket/1 /tmp/1 -- /bin/bash -c 'echo 
huhu world | wc'
      1       2      11


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