[udev]Maximum device name length

[udev]Maximum device name length

[Jayjitkumar Lobhe]

Dear All,

I am new to writting the UDEV rules. I have one query below:

- What is the maximum length of the device name that can be set using UDEV
rules?

I tried creating the device directly under /dev/directory. So the device
file that could be created was 255 characters(kernel specs I guess
i.e.NAME_MAX)

But I tried to create the device by giving sub-directories under /dev/ as
: /dev/aaa/bbb/ccc/...../abc. I could create only upto 237 or so.

I am not very sure of UDEV specifications. Can anybody please help me out?
Or atleast tell me any document that I should refer in this regards.

Many thanks in advance.

Regards,
Jayjit

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Re: [udev]Maximum device name length

[Greg KH]

On Mon, Jan 15, 2007 at 08:31:03AM -0500, Jayjitkumar Lobhe wrote:
> Dear All,
> 
> I am new to writting the UDEV rules. I have one query below:
> 
> - What is the maximum length of the device name that can be set using UDEV
> rules?
> 
> I tried creating the device directly under /dev/directory. So the device
> file that could be created was 255 characters(kernel specs I guess
> i.e.NAME_MAX)
> 
> But I tried to create the device by giving sub-directories under /dev/ as
> : /dev/aaa/bbb/ccc/...../abc. I could create only upto 237 or so.

Why would this limit ever get close to being reached?

Why do you want to know the max size?  Are you using such long paths for
a real device name?

thanks,

greg k-h

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