dhcpd-4.3.6 works only when launched with -f or -d flag

[Bill Shirley]

Do you think running as a daemon it drops privileges and then can't get to the
configuration and leases files?

Bill

On 3/5/2019 1:03 AM, Mariusz Madej wrote:
> Hi,
>
>> So how are you starting dhcpd *as a daemon*.  Systemd?
>
> I start it from console so far, just without -f and -d flags(it goes background then). I have a plan to launch hotspot from my 
> own configuration tool later.
>
>
>> What does the command line look like?
>
>
> /usr/sbin/dhcpd -cf /etc/dhcp/dhcpd.conf
>
>
> dhcpd.conf file looks like this:
>
>
> # cat /etc/dhcp/dhcpd.conf
> default-lease-time 600;
> max-lease-time 7200;
>
> subnet 192.168.5.0 netmask 255.255.255.0 {
>    range 192.168.5.10 192.168.5.100;
>    option subnet-mask 255.255.255.0;
>    option broadcast-address 192.168.5.255;
>    option routers 192.168.5.4;
>    option domain-name-servers 8.8.8.8, 8.8.4.4, 1.1.1.1;
>    option domain-name "mydomain.org";
> }
>
> Regards
> Mariusz
>
> On 02/03/19 13:16, Bill Shirley wrote:
>> So how are you starting dhcpd *as a daemon*.  Systemd?
>>
>> What does the command line look like?
>> [0:root at bb8 ~]$ ps aux | grep dhcpd
>> root     20586  0.0  0.0 119524  1004 pts/3    S+ 06:14   0:00 grep --color=auto dhcpd
>> dhcpd    22665  0.0  0.0 139796 26832 ?        Ss Feb27   0:13 /usr/sbin/dhcpd -f -cf /etc/dhcp/dhcpd.conf -user dhcpd -group 
>> dhcpd --no-pid
>> dhcpd    31924  0.0  0.0 141492 28936 ?        Ss Feb13   0:24 /usr/sbin/dhcpd -f -6 -cf /etc/dhcp/dhcpd6.conf -user dhcpd 
>> -group dhcpd --no-pid
>>
>>
>> Bill
>>
>> On 3/1/2019 1:10 AM, m.madej at xtrack.pl wrote:
>>>
>>> Hello
>>>
>>> I try to run dhcpd on my wifi network. I build it using Yocto and here are a versions of my built system:
>>>
>>> kernel: 4.14
>>>
>>> dhcpd: 4.3.6
>>>
>>> bind: 9.10.6-r0
>>>
>>> everything is running on cortex a5 core (sama5d27 processor)
>>>
>>> When i run dhcpd manually with -d or -f option (debug or foreground) everything seems to work fine. But when dhcpd is 
>>> started as daemon it does not work at all.
>>>
>>> I run strace and it seems it hangs on: "futex(0xb6913098, FUTEX_WAIT_PRIVATE, 0, NULL"
>>>
>>> I found a bug with similar behaviour here https://bugs.launchpad.net/ubuntu/+source/isc-dhcp/+bug/1551855 but as i 
>>> understand it should be fixed in version i use.
>>>
>>> Does someone have any idea?
>>>
>>> Thanks in advance
>>>
>>> Regards
>>> Mariusz Madej
>>>
>>> _______________________________________________
>>> dhcp-users mailing list
>>> dhcp-users at lists.isc.org
>>> https://lists.isc.org/mailman/listinfo/dhcp-users
>>
>>
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>
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