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From: "Adrian Hoe" <byhoe@greenlime.com>
Newsgroups: comp.lang.ada
Subject: Re: POSIX.Memory_Mapping.Map_Memory
Date: 30 Jan 2005 08:02:33 -0800
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Date: 2005-01-30T08:02:33-08:00
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Mark Lorenzen wrote:
>
> I corrected the above mentioned problem and successfully opened and
> mapped a file. Strange.

Yes. I made a mistake. It should be:

if (buf == MAP_FAILED)

and it gave me error as well. And the strace says:

open("/dev/video0", O_RDWR)             = 3
mmap2(NULL, 230400, PROT_READ|PROT_WRITE, MAP_SHARED, 3, 0) = -1 EINVAL
(Invalid argument)
fstat64(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 1), ...}) = 0
m

mmap gives EINVAL in my C and Ada programs.
--
Adrian Hoe