Re: [PATCH] char: xillybus: use strscpy() in init_chrdev

[Eli Billauer <eli.billauer@gmail.com>]

On 28/04/2026 10:55, Thorsten Blum wrote:
>> And even though it's formally OK to use strscpy() with two arguments, and
>> let the compilation machinery find out the length of the char array, I have
>> to admit that it gives me the chills. Buffer overflow and that.
> You probably mean strcpy()? strscpy() is safe regarding buffer overflow.

I meant strscpy(). We agree that it's formally safe to use, but I get a 
really bad feeling with not having the length of the buffer explicitly 
written out in the function call.

One could argue that it's better to let the machine figure out the 
length of the buffer instead of using UNITNAMELEN (because I'm a human 
and I can err), but in this specific case, UNITNAMELEN is relied upon 
anyhow a few rows later.

This is all about coding style. The main point is that I see this patch 
as a negligible optimization in CPU cycles coming with a slight 
obfuscation of the code's readability. A bit of "if it ain't broke, 
don't fix it".

Regards,
    Eli