Date: Thu, 8 Jul 1999 14:33:19 -0700 (PDT) From: Matthew Dillon <dillon@apollo.backplane.com> To: Jonathan Lemon <jlemon@americantv.com> Cc: jwd@unx.sas.com, hackers@FreeBSD.ORG Subject: Re: Strange select/poll behaviour [EBADF inconsistancy] Message-ID: <199907082133.OAA43126@apollo.backplane.com>
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:This is because initially, only 20 descriptors are allocated, and
:the system is quietly ignoring any descriptors over the allocated
:amount:
:
: if (uap->nd > p->p_fd->fd_nfiles)
: uap->nd = p->p_fd->fd_nfiles; /* forgiving; slightly wrong */
:
:This should be:
:
: if (uap->nd > p->p_fd->fd_nfiles)
: return (EBADF);
:
:--
:Jonathan
Not unless you want to blow up virtually every program that uses select!!!
Passing an nd parameter that is greater then the current number of
descriptors is perfectly valid. It's setting a bit in the bitmask for
one of those descriptors that should return EBADF!
-Matt
Matthew Dillon
<dillon@backplane.com>
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