On Wed, 28 May 2008 10:34, [EMAIL PROTECTED] said:

> Yes. Still, some people are using fopen/fread to access /dev/random, which 
> does pre-fetching on most implementations I saw, so using open/read is 
> preferred for using /dev/random.

It is not an implementaion issue but a requirement of the C standard.
To avoid buffering use

   setvbuf (fp, NULL, _IONBF, 0);

right after the fopen.



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