Date: Thu, 8 Jul 1999 16:28:37 -0500 (CDT) From: Jonathan Lemon <jlemon@americantv.com> To: jwd@unx.sas.com, hackers@freebsd.org Subject: Re: Strange select/poll behaviour [EBADF inconsistancy] Message-ID: <199907082128.QAA00631@free.pcs> In-Reply-To: <local.mail.freebsd-hackers/199907082010.QAA06869@bb01f39.unx.sas.com>
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In article <local.mail.freebsd-hackers/199907082010.QAA06869@bb01f39.unx.sas.com> you write:
>Hi,
>
> The following program returns an inconsistant rc/errno value.
>Setting a bit corresponding to filedescriptor which is not open
>is only found when it is less than 20. ie:
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
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