Re: UART question

[mlelstv%serpens.de@localhost (Michael van Elst)]

bad%bsd.de@localhost (Christoph Badura) writes:

>On Fri, Jul 11, 2025 at 09:11:31AM +1200, Lloyd Parkes wrote:
>> I suspect that this is behaviour that you have learned because Linux
>> makes it hard to use dmesg. On (all?) other Unixes dmesg can be run by
>> an unprivileged user.

>What are you talking about?

>$ uname -a;id -u; dmesg |sed 1q
>Linux flying-carpet 6.12.30-current-sunxi #1 SMP Thu May 22 12:29:54 UTC
>2025 armv7l GNU/Linux
>1000
>[    0.000000] Booting Linux on physical CPU 0x0
>$ 


Depends...

> /sbin/sysctl kernel.dmesg_restrict
kernel.dmesg_restrict = 1

That's the default, but different distributions obviously may build
their kernels with different settings for SECURITY_DMESG_RESTRICT.