C programming question

[Matthew Rice]

John Wildberger <wildberger-iRg7kjdsKiH3fQ9qLvQP4Q at public.gmane.org> writes:
> changes to the effect that I can specify on the command line the memory 
> location I want to look at.
> For instance to look at memory location 68 you have to type:
> ./mem 68
> The result is:
>  2 bytes at offset 68 are: f84d

And this is better than:

        od -j 68 -N 2 -t x2 /dev/mem

because??? ;)


> 	    short x;
> 	    ssize_t size = read( fd, &x, 4 );

Shorts aren't 4 bytes.  Perhaps you should change the '4' to:

        sizeof(short)
or      sizeof(x)

or even better, use mmap(2).

Or even way better, read a book:

        Title: Understanding the Linux Kernel
        ISBN:  0-596-00213-0

It'll be much less painful.

HTH,
-- 
matthew rice <matt-s/rLXaiAEBtBDgjK7y7TUQ at public.gmane.org>                               starnix inc.
phone: 905-771-0017 x242                        thornhill, ontario, canada
http://www.starnix.com              professional linux services & products
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