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Date: Thu, 20 Sep 2001 11:32:53 -0400
From: Christopher Faylor <cgf AT redhat DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: Cygwin 1.3.3: Win2K: select() returning EBADF (causes thrashing in Boa)
Message-ID: <20010920113253.C28377@redhat.com>
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References: <009201c141e5$9c3c0560$d50b19ac AT LSIL DOT COM>
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On Thu, Sep 20, 2001 at 04:02:21PM +0100, Phil Dempster wrote:
>I've compiled boa (http//www.boa.org) under Cygwin and it seems to work
>(incidentally much better than it did with 1.3.2).
>
>However, the select() call in Boa's main loop continually fails with
>errno==EBADF.  Whilst this doesn't actually break it functionally, it does
>cause it to thrash taking up 99% CPU time.
>
>            if (select(OPEN_MAX, &block_read_fdset,
>                       &block_write_fdset, NULL,
>                       (request_block ? &req_timeout : NULL)) == -1) {
>                /* what is the appropriate thing to do here on EBADF */
>                if (errno == EINTR)
>                    continue;   /* while(1) */
>                else if (errno != EBADF) {
>                    log_error_mesg(__FILE__, __LINE__, "select");
>                    exit(errno);
>                }
>            }
>
>Thoughts?

The obvious question is why is boa sending a bad fd to select?

What thoughts were you expecting?  You obviously need to debug the code.

cgf

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