Issue mentioned on questions list

Mehmet Erol Sanliturk m.e.sanliturk at
Sat May 14 12:49:48 UTC 2016

On Fri, May 13, 2016 at 9:50 PM, Shane Ambler <FreeBSD at> wrote:

> I'm not expecting a reply to this, it was something that come up
> discussing building custom kernels.
> Just wondering if someone may be interested in looking at the
> possibility of changing username length to a sysctl.
> As the number of people using computers is increasing, it is now
> common for web sites/mail servers to use your full email as your
> username, keeping that consistent through all username usage doesn't
> seem like an unreasonable request. I would expect a username length
> sysctl value would only be allowed to be set in the loader.conf at boot
> time, similar to zfs.arc_max

Over time , I want to generate a FreeBSD live CD/DVD with root/user
password entered on boot ( i.e. , no prerecorded passwords ) from a 2D bar
code or from a USB stick or from an SD card with sufficiently long length
defined in the kernel routines .

This feature also may be used for remote logins .

Such a long password generated by a program by random character selection
from a character alphabet  is impossible to estimate .

This "password name length" feature may also be considered along side with
"user name length" .

Mehmet Erol Sanliturk

> -------- Forwarded Message --------
> Subject: Re: Custom kernel for NAT and PF ?
> Date: Sat, 14 May 2016 13:58:56 +0930
> From: Shane Ambler <FreeBSD at ShaneWare.Biz>
> To: Doug McIntyre <merlyn at>, FreeBSD Questions <
> freebsd-questions at>
> On 14/05/2016 04:40, Doug McIntyre wrote:
>> On Fri, May 13, 2016 at 02:04:55PM +0930, Shane Ambler wrote:
>>> Now you only need to compile a custom kernel if you want to use newer
>>> features.
>> ...
>> Unfortunately, I have two situations where that isn't true.
>> For the first, I wish that just loading the PPS drivers enabled the
>> PPS_SYNC option in the kernel, but it doesn't seem to. (if there is
>> a way to enable 'option PPS_SYNC' with a generic kernel I'd like to know,
>> but my experients didn't lead me that working. I still have to compile
>> the kernel for my GPS connected NTP servers. Which makes me wonder why
>> the PPS drivers are a kernel loadable object.
> I would report that as a bug and see if it can be improved.
> The second is that the username handling is still limited to 32-bytes,
>> which really cramps my logins for '
>> billyjoebobuser at'
>> so I have to build a custom kernel with longer usernames patched for
>> the systems that need to deal with system logins like that.
> While I don't have that issue, it does sound like an old time
> limitation that should be considered for rework. Maybe it could be
> made into an adjustable sysctl.
> --
> FreeBSD - the place to B...Software Developing
> Shane Ambler
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