Date: Thu, 8 Jul 1999 14:45:36 -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: <199907082145.OAA43211@apollo.backplane.com> References: <199907082133.OAA43126@apollo.backplane.com> <19990708163828.36990@right.PCS>
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:Hmm, you're right. Arguably, it could return EINVAL. Actually, the
:man page documents this behavior, although it gets the 256 number wrong.
:
: If nfds is greater than the number of open files, select() is not guaran-
: teed to examine the unused file descriptors. For historical reasons,
: select() will always examine the first 256 descriptors.
:
:--
:Jonathan
This piece of the manual is justifying the fact that select() is not
currently checking past the current number of open files -- which
is how select() works now. The second part of that manual entry is just
plain wrong: If you pass an nd value less then 256 it will only check that
number of descriptors, it no longer examines a minimum of 256.
It would definitely not be appropriate to return EINVAL.
-Matt
Matthew Dillon
<dillon@backplane.com>
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