Easy question about drivers

Easy question about drivers

[Michael Willhide]

Are video cards considered character devices?

--
Michael Willhide
Moridin@psu.edu
http://www.personal.psu.edu/mdw190
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Re: Easy question about drivers

[Rich Lafferty]

On Fri, Feb 04, 2000 at 12:23:16PM -0500, Michael Willhide (Moridin@psu.edu) wrote:
>
> Are video cards considered character devices?

$ ls -l /dev/fb0
crw-------   1 rich     root      29,   0 Jun 25  1999 /dev/fb0
^

Yup. :-)

  -Rich

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------------------------------ Rich Lafferty ---------------------------
 Sysadmin/Programmer, Instructional and Information Technology Services
   Concordia University, Montreal, QC                 (514) 848-7625
------------------------- rich@alcor.concordia.ca ----------------------


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Re: Easy question about drivers

[Wolfgang Denk]

In message <B4C07534.2AA2%Moridin@psu.edu> you write:
>
> Are video cards considered character devices?

Yes.

In simple words, a device is either a block device, or a charcter
device.

A block device is something which can hold a filesystem.

You cannot make a filesystem on a video card.

Ergo: a video card is a character device.

Wolfgang Denk

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Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
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