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Re: Code for testing hurdselect.c

From: Svante Signell
Subject: Re: Code for testing hurdselect.c
Date: Thu, 18 Oct 2012 09:13:28 +0200

On Tue, 2012-10-16 at 23:40 +0200, Samuel Thibault wrote:
> Hello,
> Svante Signell, le Fri 24 Aug 2012 04:52:15 +0200, a écrit :
> > - file descriptors were read, sorted, and the good ones registered.
> I have to say I don't understand why doing it. If there is any file
> descriptor which is not valid, the whole call has to return EBADF,
> that's what POSIX asks.

According to POSIX that is correct for select(). However, I think you
missed the line below in my message:
Note: Only for the poll case, select was not yet implemented!

And there POSIX says:
The poll() function shall support regular files, terminal and
pseudo-terminal devices, FIFOs, pipes, sockets and [XSR] [Option Start]
STREAMS-based files. [Option End] The behavior of poll() on elements of
fds that refer to other types of file is unspecified.
        Upon successful completion, poll() shall return a non-negative
        value. A positive value indicates the total number of file
        descriptors that have been selected (that is, file descriptors
        for which the revents member is non-zero).

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