From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#44320: [PATH] [27.1] Make sure send-string-to-terminal send all contents Date: Mon, 02 Nov 2020 18:14:56 +0200 Message-ID: <83wnz3d9bz.fsf@gnu.org> References: <5f9b49e9.1c69fb81.72b0f.80d6@mx.google.com> <83ft5wb0jz.fsf@gnu.org> <87mu03j3cv.fsf@gnus.org> <83v9eralri.fsf@gnu.org> <0EA6FC59-A66D-45B8-8B09-62D6A9032FBC@hxcore.ol> <83eelbepw3.fsf@gnu.org> <877dr321ya.fsf@igel.home> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="1909"; mail-complaints-to="usenet@ciao.gmane.io" Cc: larsi@gnus.org, sunlin7@yahoo.com, 44320@debbugs.gnu.org, lin.sun@zoom.us To: Andreas Schwab Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Mon Nov 02 17:16:23 2020 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1kZcVJ-0000H6-T8 for geb-bug-gnu-emacs@m.gmane-mx.org; Mon, 02 Nov 2020 17:16:21 +0100 Original-Received: from localhost ([::1]:41406 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kZcVI-0005D0-QF for geb-bug-gnu-emacs@m.gmane-mx.org; Mon, 02 Nov 2020 11:16:20 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:39982) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kZcV1-000588-2g for bug-gnu-emacs@gnu.org; Mon, 02 Nov 2020 11:16:03 -0500 Original-Received: from debbugs.gnu.org ([209.51.188.43]:59026) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1kZcV0-0007Ab-OV for bug-gnu-emacs@gnu.org; Mon, 02 Nov 2020 11:16:02 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1kZcV0-0008WK-ID for bug-gnu-emacs@gnu.org; Mon, 02 Nov 2020 11:16:02 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Mon, 02 Nov 2020 16:16:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 44320 X-GNU-PR-Package: emacs Original-Received: via spool by 44320-submit@debbugs.gnu.org id=B44320.160433371632674 (code B ref 44320); Mon, 02 Nov 2020 16:16:02 +0000 Original-Received: (at 44320) by debbugs.gnu.org; 2 Nov 2020 16:15:16 +0000 Original-Received: from localhost ([127.0.0.1]:42336 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1kZcUF-0008Uu-Qe for submit@debbugs.gnu.org; Mon, 02 Nov 2020 11:15:16 -0500 Original-Received: from eggs.gnu.org ([209.51.188.92]:39636) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1kZcUE-0008Uj-M0 for 44320@debbugs.gnu.org; Mon, 02 Nov 2020 11:15:15 -0500 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:49315) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kZcU8-0006vz-Eh; Mon, 02 Nov 2020 11:15:08 -0500 Original-Received: from [176.228.60.248] (port=3553 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1kZcU6-0001D9-4m; Mon, 02 Nov 2020 11:15:08 -0500 In-Reply-To: <877dr321ya.fsf@igel.home> (message from Andreas Schwab on Mon, 02 Nov 2020 16:49:49 +0100) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.io gmane.emacs.bugs:192545 Archived-At: > From: Andreas Schwab > Cc: LinSun , larsi@gnus.org, sunlin7@yahoo.com, > 44320@debbugs.gnu.org > Date: Mon, 02 Nov 2020 16:49:49 +0100 > > >> write(6, "…", 256) = ? ERESTARTSYS (To be restarted if SA_RESTART is set) > > > > Thanks. > > > > I don't think I know how to interpret this trace, or understand the > > significance of ERESTARTSYS. > > It is translated to EINTR on signal handler return: > > rt_sigreturn({mask=[]}) = -1 EINTR (Interrupted system call) > > Outside of strace, ERESTARTSYS is never observed by user-space. So you are saying that the call to 'write' issued by 'fwrite' or 'fflush' was interrupted by SIGIO, and that is why it didn't write all of its data? IOW, the size of the string passed to 'fwrite' has no real significance here, and instead the problem is the signal? If so, is it normal for 'fwrite'/'fflush' to punt instead of continuing its 'write' loop upon receiving EINTR? I can understand why we need a loop when we call 'write' directly, but I'd expect 'fwrite' to do that internally. Am I naïve? Thanks.