open() from within a Device driver

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2 total messages Started by Rajeev Menon Mon, 23 Nov 1992 22:29

#2398

Author: Rajeev Menon
Date: Mon, 23 Nov 1992 22:29

20 lines
1247 bytes

I have a device driver on SCO UNIX SV3.2 (openDesktop 1.0) that
needs to open a regular file from within the driver, write stuff to it
and close the file later on, basically the equivalent of the open(), 
write(), close() system call. However, I'd guess I have to use kernel
equivalents being inside a device driver, right ?

The device driver manual lists a set of kernel routines, but I am
not sure what's appropriate. I see no equivalent of open, although
I see a db_read and a db_write. I'd appreciate hearing from someone
who knows. If you have done this on other UNIXen, I'd be interested 
in knowing the equivalents too.

thanks

rajeev
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Rajeev Menon				Phone : (707)-577-2302
Hewlett Packard Company			e-mail: rajeev@sr.hp.com
1400 Fountaingrove Pkwy
Santa Rosa CA 95403

Re: open() from within a Device driver

#2399

Author: Brian Fitzgerald
Date: Tue, 24 Nov 1992 05:49

9 lines
682 bytes

Rajeev Menon writes:
>I have a device driver on SCO UNIX SV3.2 (openDesktop 1.0) that
>needs to open a regular file from within the driver, write stuff to it
>and close the file later on, basically the equivalent of the open(), 
>write(), close() system call. 

Gadzooks!  Why?

Brian

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