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dmarc=pass header.from=ntlworld.com; arc=none Received: from smtpq1.tb.ukmail.iss.as9143.net ([212.54.57.96]:56836) by zero.zsh.org with esmtps (TLS1.2:ECDHE-RSA-AES256-GCM-SHA384:256) id 1ntnhT-0003JW-4m; Wed, 25 May 2022 09:53:08 +0000 Received: from [212.54.57.82] (helo=smtp3.tb.ukmail.iss.as9143.net) by smtpq1.tb.ukmail.iss.as9143.net with esmtp (Exim 4.90_1) (envelope-from ) id 1ntnhS-0005yp-V5 for zsh-workers@zsh.org; Wed, 25 May 2022 11:53:06 +0200 Received: from oxbe13.tb.ukmail.iss.as9143.net ([172.25.160.144]) by smtp3.tb.ukmail.iss.as9143.net with ESMTP id tnhSnoWehmkHatnhSn1PgU; Wed, 25 May 2022 11:53:06 +0200 X-Env-Mailfrom: p.w.stephenson@ntlworld.com X-Env-Rcptto: zsh-workers@zsh.org X-SourceIP: 172.25.160.144 X-CNFS-Analysis: v=2.4 cv=OYGLszfY c=1 sm=1 tr=0 ts=628dfc82 cx=a_exe a=wuFMYA7voKp1dZz7Z+vj5Q==:117 a=wbvTLvLwOfMA:10 a=IkcTkHD0fZMA:10 a=7H6ixmLU1AQA:10 a=NLZqzBF-AAAA:8 a=i3_X4zI8AAAA:8 a=akhSDD22mFiVuS_kdEsA:9 a=QEXdDO2ut3YA:10 a=wW_WBVUImv98JQXhvVPZ:22 a=8oTDZq07e2cfE5SwPOkS:22 X-Authenticated-Sender: p.w.stephenson@ntlworld.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ntlworld.com; s=meg.feb2017; t=1653472386; bh=VUtMfq3Ctiwde3xrzAZMJ7gHxWmobnnFOwXgQbd2PiY=; h=Date:From:To:In-Reply-To:References:Subject; b=hjTnX/wppFeOKicAWXEFvpJrQ4ZQoSa4bwHJHx9ELHQ6FOOxq3NtDCL5F8rBzb6gv AGkP9bc7FE/aCU03yFfr3qbLmTLuhO2kQNXqzn20J7yiHeqAWD3o0WjIOB4M6Gb4kG lwd/OsEdtVXj2Xt6kYcSVPiEa5T583cJidCC97Xd/IVE3HH54GjLHX9ZZFGLhDBYsw dyrAZzQBbfG+/bwhdzo5QtQfsFLPAloXHu1KAlculI394ZEB3stlBgbhognTYxK3Ur eXQRfGCZtwEoxkz11iUw8B6O0EQv4CkDqq5huCcSbfKHdUBG73qg8D+sv+034bOJRH sFYwA9s4wK4hA== Date: Wed, 25 May 2022 10:53:06 +0100 (BST) From: Peter Stephenson To: Stefan Radziuk , zsh-workers@zsh.org Message-ID: <1126442111.366927.1653472386462@mail2.virginmedia.com> In-Reply-To: <200084252.242457.1653041722599@mail2.virginmedia.com> References: <200084252.242457.1653041722599@mail2.virginmedia.com> Subject: Re: Using the history expansion modifier 'a' results in excessive lstat calls MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Priority: 3 Importance: Medium X-Mailer: Open-Xchange Mailer v7.8.4-Rev72 X-Originating-IP: 147.161.167.85 X-Originating-Client: open-xchange-appsuite X-CMAE-Envelope: MS4xfKl0BOoDEJx6ziY+wkdJ80QKK2kAHrt7JpeEqirq8hxvOTLcp8raWGV0IJZuPn9XskqaG8tHk0vTbdyFO6AlBuKBqIZ2ARinUrkh7w+9mb5fMpbyISss 0prHneQiyWIg/U+zUqkkdn8/E7Au/SPn5XG0J3mywcVb1Om9umg30vUzhWPKc4XDEG9V6w78jH38LJD3cmaNWU9PJCDgfQkC5JY7OdU7O4qS9dH+wzz3TmB3 9+auG05GqoqN+YSJNomn6ZaW0ITE9a6ervYI8AXUCUs= X-Seq: 50287 Archived-At: X-Loop: zsh-workers@zsh.org Errors-To: zsh-workers-owner@zsh.org Precedence: list Precedence: bulk Sender: zsh-workers-request@zsh.org X-no-archive: yes List-Id: List-Help: List-Subscribe: List-Unsubscribe: List-Post: List-Owner: List-Archive: > On 20 May 2022 at 11:15 Peter Stephenson wrote: > On 20 May 2022 at 11:08 Stefan Radziuk wrote: > > I have looked through some threads in the mailing list to find out why > > zgetdir > is being used over getcwd in the first place. It seems it was > > implemented this way in the 1990s to work around a bug in some implementations > > of getcwd, which should not be a concern on modern systems. > > > > I was wondering if zgetdir is still the right way to do this? Are there > > use cases where it is preferred over getcwd? Maybe zgetcwd could simply > > use getcwd primarily (i.e. not as fallback), or perhaps USE_GETCWD could > > be enabled by default (currently it is only enabled on QNX builds). > > The best bet would probably be to try that by default once we're sure the > release is out of the way --- as you say there's a good chance that's the > right way to go now and I don't think we're going to find out the problems > any other way. Will it be worth seeing what effects the following has? pws diff --git a/configure.ac b/configure.ac index c72148d06..77e381f50 100644 --- a/configure.ac +++ b/configure.ac @@ -2021,11 +2021,15 @@ if test x$zsh_cv_sys_superroot = xyes; then fi dnl CHECK FOR SYSTEMS REQUIRING GETCWD +dnl This is now turned on by default, as we expect modern getcwd +dnl implementations to work correctly. Any exceptions should be added +dnl to the first case. Currently there are none, hence it is forced +dnl not to match. AC_CACHE_CHECK(whether we should use the native getcwd, zsh_cv_use_getcwd, [case "${host_cpu}-${host_vendor}-${host_os}" in - *QNX*) zsh_cv_use_getcwd=yes ;; - *) zsh_cv_use_getcwd=no ;; + *NOMATCH*) zsh_cv_use_getcwd=no ;; + *) zsh_cv_use_getcwd=yes ;; esac]) AH_TEMPLATE([USE_GETCWD], [Define to 1 if you need to use the native getcwd.])