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SubjectRe: bug in count_open_files() or a strange granularity?
   Date:   Tue, 28 Nov 2000 15:13:44 +0000 (GMT)
From: Tigran Aivazian <tigran@veritas.com>

I know that there is no problem due to the way it is called in
copy_files() -- it would only be above 32. But for what I want to
use it, I need the _correct_ number of open file descriptors and
not some "rounded up to 32" one.

That function is static for a reason :-) It is not meant
for external use. What it gives you is the smallest multiple
of (8 * sizeof(long)) which is larger than the largest file
descriptor the task has open.

What you want is something like:

static int num_open_files(struct files_struct *files, int size)
{
total = 0;
for (i = size / (8 * sizeof(long)); i > 0; )
total += count_bits(files->open_fds->fds_bits[--i]);

return total;
}

Later,
David S. Miller
davem@redhat.com
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