<div dir="auto">Make sure user/group perms are valid.<div dir="auto"><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Jan 6, 2020, 1:42 PM Jay Foster <<a href="mailto:jay@systech.com">jay@systech.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">I am using the ISC DHCP server (dhcpd) version 4.3.6 from a rocko Yocto <br>
build. When dhcpd is started without the '-f' or '-d' options (forks to <br>
the background) it does not work. DHCP DISCOVER requests are sent, but <br>
the dhcpd application does not respond. I can attach strace to the <br>
dhcpd process and see that dhcpd just sleeps in an futex() call.<br>
<br>
If I start dhcpd with either the '-f' or '-d' options so it does not <br>
fork, then it works properly.<br>
<br>
I have run dhcpd (both forking and non forking) using strace to see if I <br>
could spot any differences. The only thing I notice is that when <br>
forking, the parent process terminates (expected) along with 3 other <br>
child processes/threads. It looks like these other threads are supposed <br>
to handle the ISC tasks/messages, but are not cloned by the fork and are <br>
not present after forking.<br>
<br>
For reference, with an older version of ISC DHCP server (4.1.1-P1) on an <br>
older product, this problem does not occur.<br>
<br>
Any ideas where to look?<br>
<br>
<br>
<br>
<br>
<br>
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</blockquote></div>