DHCP Server Fails When Forking
Jay Foster
jay at systech.com
Mon Jan 6 21:14:53 UTC 2020
Can you be more specific? /usr/sbin/dhcpd is root:root. /usr/sbin/dhcpd
is being run as root.
On 1/6/2020 12:58 PM, Christopher Barry wrote:
> Make sure user/group perms are valid.
>
>
> On Mon, Jan 6, 2020, 1:42 PM Jay Foster <jay at systech.com
> <mailto:jay at systech.com>> wrote:
>
> I am using the ISC DHCP server (dhcpd) version 4.3.6 from a rocko
> Yocto
> build. When dhcpd is started without the '-f' or '-d' options
> (forks to
> the background) it does not work. DHCP DISCOVER requests are
> sent, but
> the dhcpd application does not respond. I can attach strace to the
> dhcpd process and see that dhcpd just sleeps in an futex() call.
>
> If I start dhcpd with either the '-f' or '-d' options so it does not
> fork, then it works properly.
>
> I have run dhcpd (both forking and non forking) using strace to
> see if I
> could spot any differences. The only thing I notice is that when
> forking, the parent process terminates (expected) along with 3 other
> child processes/threads. It looks like these other threads are
> supposed
> to handle the ISC tasks/messages, but are not cloned by the fork
> and are
> not present after forking.
>
> For reference, with an older version of ISC DHCP server (4.1.1-P1)
> on an
> older product, this problem does not occur.
>
> Any ideas where to look?
>
>
>
>
>
> _______________________________________________
> dhcp-users mailing list
> dhcp-users at lists.isc.org <mailto:dhcp-users at lists.isc.org>
> https://lists.isc.org/mailman/listinfo/dhcp-users
>
>
> _______________________________________________
> dhcp-users mailing list
> dhcp-users at lists.isc.org
> https://lists.isc.org/mailman/listinfo/dhcp-users
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.isc.org/pipermail/dhcp-users/attachments/20200106/d6fac1ee/attachment.htm>
More information about the dhcp-users
mailing list