[SCM] glibc maintenance branch, youpi/poll_errors_fixes, created. glibc-2.16-ports-merge-3812-g4cf55bf

[Samuel Thibault]

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The branch, youpi/poll_errors_fixes has been created
        at  4cf55bf8840483c2c01bcc84c6a54cbe5589a552 (commit)

- Log -----------------------------------------------------------------
commit 4cf55bf8840483c2c01bcc84c6a54cbe5589a552
Author: Samuel Thibault <address@hidden>
Date:   Wed Feb 13 01:11:28 2013 +0100

    Fix poll and select POSIX compliancy details about errors
    
    This fixes the following:
    
    - Poll must not return immediately on error, including EBADF, and instead
      report POLLHUP/POLLERR/POLLNVAL
    - Select must report EBADF if some set contains an invalid FD.
    
    The idea is to move error management to after all select calls, in the
    poll/select final treatment. The error is instead recorded in a new `error'
    field, and a new SELECT_ERROR bit set.
    
    Thanks Svante Signell for the initial version of the patch.
    
    * hurd/hurdselect.c (SELECT_ERROR): New macro.
    (_hurd_select):
    - Add `error' field to `d' structures array.
    - If a poll descriptor is bogus, set EBADF, but continue.
    - Go through the whole fd_set, not only until _hurd_dtablesize. Return 
EBADF if
    there is any bit set above _hurd_dtablesize.
    - Do not request io_select on bogus descriptors (SELECT_ERROR).
    - On io_select request error, record the error.
    - On io_select bogus reply, use EIO error code.
    - On io_select bogus or error reply, record the error.
    - Do not destroy reply port for bogus FDs.
    - On error, make poll set POLLHUP in the EPIPE case, POLLNVAL in the EBADF
    case, or else POLLERR.
    - On error, make select simulated readiness.

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