error setting pipe to non-blocking IO

[Andy Howell]

I am trying to setup a pipe to do non-blocking IO:

int main()
{
        int pipefd[2];
        int n;
        n = 1;
        
        pipe(pipefd);
        perror("Pipe: ");
        ioctl(pipefd[0], FIOBIO, &n);
        perror("Ioctl: ");
}
When I run this, I get:

Pipe: No Error
Ioctl: Invalid argument
Any ideas?

Thanks,

        Andy
        
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