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Date: Sat, 14 Apr 2007 16:36:44 +0100
From: "Jamie Mortimore" <jamie DOT mortimore AT googlemail DOT com>
To: cygwin AT cygwin DOT com
Subject: Unable to open /dev/mem: permission denied
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Hi,

There is probably a straightforward answer to this question. I am
trying to run a c program under cygwin that I have compiled using gcc
in cygwin. The program is trying to open /dev/mem in read/write mode.
However I always get permission denied. The code looks like:

int fd = open("/dev/mem", O_RDWR);

if(fd < 0) {
    perror("Unable to open /dev/mem");
    exit(2);
}

The output I get from this is:

Unable to open /dev/mem: Permission denied

I have set up a root user (in /etc/passwd) and am running the program
as root but this doesn't solve the problem. Any help much appreciated.

Thanks,
Jamie.

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