[Dnsmasq-discuss] feature: dictionary order import of addn-hosts dirs?

john doe johndoe65534 at mail.com
Tue Aug 17 18:24:22 UTC 2021


On 8/14/2021 7:00 PM, Simon Kelley wrote:
>
>
> On 12/08/2021 18:30, john doe wrote:
>> On 8/12/2021 5:04 PM, Simon Kelley wrote:
>>> On 11/08/2021 00:25, Ed W wrote:
>>>> On 10/08/2021 23:12, Simon Kelley wrote:
>>>>> On 08/08/2021 14:02, Ed W wrote:
>>>>>> On 19/07/2021 18:52, Ed W wrote:
>>
>> [snip]
>>
>>> --dhcp-hostsdir --dhcp-optsdir and --hostsdir work in much the same way
>>> as when the first three options are given a directory; the files are
>>> read at start-up and when SIGHUP is received. BUT any file which is
>>> modified or created gets read asynchronously, without needing SIGHUP to
>>> be sent. Note that the old data from the files is not discarded when
>>> this is done: if a file gets modified, then it gets re-read but data
>>> from the previous version of the file is not deleted. This means that
>>
>> Why is deleting not happening when the file is reread?
>>
>>> this facility is useful for adding hosts to the configuration without
>>> the upheaval of a full SIGHUP re-read. Anytime you want to delete stuff,
>>> SIGHUP is still needed.
>>>
>>
>> In other words, what is the reasoning behind requiring SIGHUP to delete
>> stuff?
>>
>
> The cache datastructures don't allow track where names came from, so the
> choices are to clear the cache and re-read all configuration files, or
> not to delete anything.
>

Thank you, that would explain the following:

inotify, new or changed file /etc/dnsmasq-dhcp-hosts.d/try
read /etc/dnsmasq-dhcp-hosts.d/try
duplicate dhcp-host IP address 172.17.232.10 at line 7 of
/etc/dnsmasq-dhcp-hosts.d/try
duplicate dhcp-host IP address 172.17.232.11 at line 9 of
/etc/dnsmasq-dhcp-hosts.d/try


Is there a way to disable inotify?

P.S.

When 'duplicate' messages are razed would it be possible to have a hint
that SIGHUP should be used?

--
John Doe



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