GNU bug report logs - #50043
28.0.50; USABLE_SIGOI undef code paths do not work correctly

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Ken Brown <kbrown <at> cornell.edu>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#50043: closed (28.0.50; USABLE_SIGOI undef code paths do not
 work correctly)
Date: Wed, 17 Nov 2021 17:46:03 +0000

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Your message dated Wed, 17 Nov 2021 12:45:24 -0500
with message-id <8bdea42d-67bd-d8cd-fa5c-bf9059c11146 <at> cornell.edu>
and subject line Re: bug#50043: 28.0.50; USABLE_SIGOI undef code paths do not work correctly
has caused the debbugs.gnu.org bug report #50043,
regarding 28.0.50; USABLE_SIGOI undef code paths do not work correctly
to be marked as done.

(If you believe you have received this mail in error, please contact
help-debbugs <at> gnu.org.)


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From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: bug-gnu-emacs <at> gnu.org
Subject: 28.0.50; USABLE_SIGOI undef code paths do not work correctly
Date: Fri, 13 Aug 2021 13:56:40 +0200

To reproduce the problem on Debian (at least), edit src/config.h to
this:

/* Define to 1 if SIGIO is usable. */
/* #define USABLE_SIGIO 0 */

Then recompile Emacs and say

(let ((value 'SECONDARY)
      (x-selection-timeout 2000))
  ;;; from org-get-x-clipboard in lisp/org-compat.el
  (gui-get-selection value 'UTF8_STRING)
  (gui-get-selection value 'COMPOUND_TEXT)
  (gui-get-selection value 'STRING)
  (gui-get-selection value 'TEXT))

This will hang for two seconds instead of returning immediately if
USABLE_SIGIO is defined.

Now, we have SIGIO on almost all supported platforms.  The only ones
that have it disabled might be these ones:

  hpux* | nacl | solaris | unixware )
    emacs_broken_SIGIO=yes

Which is probably why this hasn't been reported more.  (See bug#29170.)

So this isn't exactly a high impact problem, but it should be fixed
anyway.



-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

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From: Ken Brown <kbrown <at> cornell.edu>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: larsi <at> gnus.org, 50043-done <at> debbugs.gnu.org
Subject: Re: bug#50043: 28.0.50; USABLE_SIGOI undef code paths do not work
 correctly
Date: Wed, 17 Nov 2021 12:45:24 -0500

On 11/17/2021 12:37 PM, Eli Zaretskii wrote:
>> Date: Wed, 17 Nov 2021 12:25:38 -0500
>> Cc: larsi <at> gnus.org, 50043 <at> debbugs.gnu.org
>> From: Ken Brown <kbrown <at> cornell.edu>
>>
>> There's still one more issue related to this bug, which I mentioned earlier: If
>> x_selection_timeout is zero, x_get_foreign_selection will call
>> wait_reading_process output with an infinite timeout rather than a zero timeout,
>> which I'm sure is not what was intended.  The attached patch fixes that.
> 
> Bu that's clearly what was intended.  The doc string of
> x-selection-timeout says:
> 
>    A value of 0 means wait as long as necessary.

Oh, I somehow missed that, sorry.  In that case I'm closing the bug.

Ken

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