mmap a raw device?

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3 total messages Started by Mark Harrison Sun, 08 Nov 1992 00:07

#1452

Author: Mark Harrison
Date: Sun, 08 Nov 1992 00:07

12 lines
970 bytes

Should a process be able to mmap() a raw (disk) device?  The
example in the manual shows that an error will occur on mmap()ing
to a terminal, for example, but I can't find a definitive
reference on whether it will or won't work on a raw device.

A colleague's preliminary tests indicate that it won't work.

SunOS 4.something, if it makes a difference.
-- 
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"Hi, this is Captain Kirk.  I can't | Mark Harrison     harrison@jho.com
answer my communicator right now..."| Richardson, TX    (214)669-2853

Re: mmap a raw device?

#1456

Author: Guy Harris
Date: Mon, 09 Nov 1992 00:27

3 lines
501 bytes

>Should a process be able to mmap() a raw (disk) device?

Under SunOS 4.x?  No, a process will not be able to do that.

Re: mmap a raw device?

#1460

Author: Thomas Gabrysch
Date: Wed, 11 Nov 1992 20:50

9 lines
783 bytes

harrison@jho.com (Mark Harrison) writes:
: Should a process be able to mmap() a raw (disk) device?  The
: example in the manual shows that an error will occur on mmap()ing
: to a terminal, for example, but I can't find a definitive
: reference on whether it will or won't work on a raw device.

According to the source code you can only mmap regular files.

- Thomas Gabrysch

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