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O_PATH problem on some versions of Cygwin) Message-ID: References: <9308fcb1-bb7e-229b-aacf-8c55db00fca6@cornell.edu> X-Gnu-PR-Message: they-closed 36405 X-Gnu-PR-Package: emacs Reply-To: 36405@debbugs.gnu.org Date: Thu, 27 Jun 2019 20:48:03 +0000 Content-Type: multipart/mixed; boundary="----------=_1561668483-1622-1" This is a multi-part message in MIME format... ------------=_1561668483-1622-1 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Your bug report #36405: 26.2.90; O_PATH problem on some versions of Cygwin which was filed against the emacs package, has been closed. The explanation is attached below, along with your original report. If you require more details, please reply to 36405@debbugs.gnu.org. --=20 36405: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=3D36405 GNU Bug Tracking System Contact help-debbugs@gnu.org with problems ------------=_1561668483-1622-1 Content-Type: message/rfc822 Content-Disposition: inline Content-Transfer-Encoding: 7bit Received: (at 36405-done) by debbugs.gnu.org; 27 Jun 2019 20:47:40 +0000 Received: from localhost ([127.0.0.1]:39866 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1hgbIx-0000Kb-Tx for submit@debbugs.gnu.org; Thu, 27 Jun 2019 16:47:40 -0400 Received: from zimbra.cs.ucla.edu ([131.179.128.68]:45966) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1hgbIt-0000EK-HJ for 36405-done@debbugs.gnu.org; Thu, 27 Jun 2019 16:47:36 -0400 Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id 85E11161BEA; Thu, 27 Jun 2019 13:47:28 -0700 (PDT) Received: from zimbra.cs.ucla.edu ([127.0.0.1]) by localhost (zimbra.cs.ucla.edu [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id YvmMtUNXRzqe; 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Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.7.2 MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="------------BD76F52CF5AA6D9512EBECDB" Content-Language: en-US X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 36405-done Cc: 36405-done@debbugs.gnu.org X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -3.3 (---) This is a multi-part message in MIME format. --------------BD76F52CF5AA6D9512EBECDB Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Thanks, but that patch intrudes on the mainline code a bit. It's simpler to just disable O_PATH on Cygwin until the old Cygwin versions die out. Also, there's a similar issue in fileio.c. I installed the attached, which should work around the problem in both source files. --------------BD76F52CF5AA6D9512EBECDB Content-Type: text/x-patch; name="0001-Work-around-Cygwin-bug-with-O_PATH.patch" Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename="0001-Work-around-Cygwin-bug-with-O_PATH.patch" >From e7200b3cf9b4a6470197915a31c45739f078683b Mon Sep 17 00:00:00 2001 From: Paul Eggert Date: Thu, 27 Jun 2019 13:05:05 -0700 Subject: [PATCH] Work around Cygwin bug with O_PATH Problem reported by Ken Brown (Bug#36405). * src/dired.c, src/fileio.c (O_PATH) [__CYGWIN__]: Undef. --- src/dired.c | 4 ++++ src/fileio.c | 4 ++++ 2 files changed, 8 insertions(+) diff --git a/src/dired.c b/src/dired.c index 493758292b..b8197d36a0 100644 --- a/src/dired.c +++ b/src/dired.c @@ -41,6 +41,10 @@ #include "buffer.h" #include "coding.h" +#ifdef __CYGWIN__ +# undef O_PATH /* Buggy in Cygwin 3.0.0 through 3.0.7. */ +#endif + #ifdef MSDOS #include "msdos.h" /* for fstatat */ #endif diff --git a/src/fileio.c b/src/fileio.c index ed1d2aedf3..e36118652c 100644 --- a/src/fileio.c +++ b/src/fileio.c @@ -61,6 +61,10 @@ Copyright (C) 1985-1988, 1993-2019 Free Software Foundation, Inc. # include #endif +#ifdef __CYGWIN__ +# undef O_PATH /* Buggy in Cygwin 3.0.0 through 3.0.7. */ +#endif + #ifdef WINDOWSNT #define NOMINMAX 1 #include -- 2.21.0 --------------BD76F52CF5AA6D9512EBECDB-- ------------=_1561668483-1622-1 Content-Type: message/rfc822 Content-Disposition: inline Content-Transfer-Encoding: 7bit Received: (at submit) by debbugs.gnu.org; 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O_PATH problem on some versions of Cygwin Thread-Topic: 26.2.90; O_PATH problem on some versions of Cygwin Thread-Index: AQHVLR6LcyGkuSLIYkm70RgOcRrM4Q== Date: Thu, 27 Jun 2019 19:28:48 +0000 Message-ID: <9308fcb1-bb7e-229b-aacf-8c55db00fca6@cornell.edu> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: yes X-MS-TNEF-Correlator: user-agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.7.2 x-originating-ip: [68.175.129.7] x-clientproxiedby: BN6PR12CA0025.namprd12.prod.outlook.com (2603:10b6:405:70::11) To CY1PR04MB2300.namprd04.prod.outlook.com (2a01:111:e400:c61b::20) authentication-results: spf=none (sender IP is ) smtp.mailfrom=kbrown@cornell.edu; x-ms-exchange-messagesentrepresentingtype: 1 x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 4648a491-77b2-420c-6eb6-08d6fb35ad65 x-microsoft-antispam: BCL:0; PCL:0; RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600148)(711020)(4605104)(1401327)(2017052603328)(49563074)(7193020); 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O_PATH problem on some versions of Cygwin Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Fri, 28 Jun 2019 06:26:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 36405 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: To: Paul Eggert Cc: 36405@debbugs.gnu.org, kbrown@cornell.edu, eggert@cs.ucla.edu Received: via spool by 36405-submit@debbugs.gnu.org id=B36405.156170312412027 (code B ref 36405); Fri, 28 Jun 2019 06:26:02 +0000 Received: (at 36405) by debbugs.gnu.org; 28 Jun 2019 06:25:24 +0000 Received: from localhost ([127.0.0.1]:40268 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1hgkK3-00037v-V5 for submit@debbugs.gnu.org; Fri, 28 Jun 2019 02:25:24 -0400 Received: from eggs.gnu.org ([209.51.188.92]:60714) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1hgkK2-00037g-Ga for 36405@debbugs.gnu.org; Fri, 28 Jun 2019 02:25:22 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]:37830) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hgkJw-0006QL-W8; Fri, 28 Jun 2019 02:25:17 -0400 Received: from [176.228.60.248] (port=2962 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1hgkJv-0001tz-4y; Fri, 28 Jun 2019 02:25:16 -0400 Date: Fri, 28 Jun 2019 09:25:02 +0300 Message-Id: <83k1d6i5vl.fsf@gnu.org> From: Eli Zaretskii In-reply-to: (message from Paul Eggert on Thu, 27 Jun 2019 13:47:27 -0700) References: <9308fcb1-bb7e-229b-aacf-8c55db00fca6@cornell.edu> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Spam-Score: -2.3 (--) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -3.3 (---) > From: Paul Eggert > Date: Thu, 27 Jun 2019 13:47:27 -0700 > Cc: 36405-done@debbugs.gnu.org > > Thanks, but that patch intrudes on the mainline code a bit. It's simpler > to just disable O_PATH on Cygwin until the old Cygwin versions die out. IMO, that's too drastic. Cygwin 3 is quite new, AFAIK, so it will be years and years before the old versions die out; no one will remember this bit by then. What problems did you see/envision on other platforms with the original patch? From unknown Fri Aug 15 21:26:15 2025 X-Loop: help-debbugs@gnu.org Subject: bug#36405: 26.2.90; O_PATH problem on some versions of Cygwin Resent-From: Ken Brown Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Fri, 28 Jun 2019 17:58:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 36405 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: To: Paul Eggert Cc: Eli Zaretskii , "36405@debbugs.gnu.org" <36405@debbugs.gnu.org> Received: via spool by 36405-submit@debbugs.gnu.org id=B36405.1561744633508 (code B ref 36405); Fri, 28 Jun 2019 17:58:01 +0000 Received: (at 36405) by debbugs.gnu.org; 28 Jun 2019 17:57:13 +0000 Received: from localhost ([127.0.0.1]:42934 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1hgv7Z-000087-12 for submit@debbugs.gnu.org; Fri, 28 Jun 2019 13:57:13 -0400 Received: from mail-eopbgr740131.outbound.protection.outlook.com ([40.107.74.131]:62540 helo=NAM01-BN3-obe.outbound.protection.outlook.com) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1hgv7X-00007k-07 for 36405@debbugs.gnu.org; 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DIR:OUT; SFP:1102; SCL:1; SRVR:CY1PR04MB2106; H:CY1PR04MB2300.namprd04.prod.outlook.com; FPR:; SPF:None; LANG:en; PTR:InfoNoRecords; A:1; MX:1; received-spf: None (protection.outlook.com: cornell.edu does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: GHYAvItGnWZ3CBdyhhNSaAOZXj+wHKsqteSTJuodNE47zTxhWDOOC/qvaTGS3u2zM5OVHsl/031C2MK5ziiWTgfUaXZ14s/dAR8Ktpgzb5n9XYQZTSaDre9Cwbjsu+KpXok3nNEO0+RzotzsVRFag2QI9jO4mr/CkxYmSKynGDXoOQPWF3weg+mrt0k+ztJcJ/vmBhzH89x9MLyK9GA2juX/KQa+cK06ClpAKrudjCIqXSNtXTafLAzUDTDKA+u2vwXtNEnrZD7F84PyjuAqnt/z1GwqVDTV6JL6mZLD5AzFdGvDsM7pkVIE8o9IR7KzuQmJP1yA/LShHNVaKKnMmMDIkr3ggSYcRKzYMr7Gn00Ix8vobBtNyZIHhGeIFUW2GhMgoM4gDkGPKwPatpX/+Uz3hJgRuSwmRu4Su64U8Bk= Content-Type: text/plain; charset="utf-8" Content-ID: Content-Transfer-Encoding: base64 MIME-Version: 1.0 X-OriginatorOrg: cornell.edu X-MS-Exchange-CrossTenant-Network-Message-Id: f27957f2-faa9-4157-f9dc-08d6fbf206fc X-MS-Exchange-CrossTenant-originalarrivaltime: 28 Jun 2019 17:57:04.2137 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 5d7e4366-1b9b-45cf-8e79-b14b27df46e1 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: ksb2@cornell.edu X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY1PR04MB2106 X-Spam-Score: -0.0 (/) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -1.0 (-) T24gNi8yNy8yMDE5IDQ6NDcgUE0sIFBhdWwgRWdnZXJ0IHdyb3RlOg0KPiAtLS0gYS9zcmMvZmls ZWlvLmMNCj4gKysrIGIvc3JjL2ZpbGVpby5jDQo+IEBAIC02MSw2ICs2MSwxMCBAQCBDb3B5cmln aHQgKEMpIDE5ODUtMTk4OCwgMTk5My0yMDE5IEZyZWUgU29mdHdhcmUgRm91bmRhdGlvbiwgSW5j Lg0KPiAgICMgaW5jbHVkZSA8bGludXgvZnMuaD4NCj4gICAjZW5kaWYNCj4gICANCj4gKyNpZmRl ZiBfX0NZR1dJTl9fDQo+ICsjIHVuZGVmIE9fUEFUSCAvKiBCdWdneSBpbiBDeWd3aW4gMy4wLjAg dGhyb3VnaCAzLjAuNy4gICovDQo+ICsjZW5kaWYNCg0KVGhpcyBodW5rIGlzIG5vdCBuZWNlc3Nh cnkuICBUaGUgb25seSB1c2Ugb2YgT19QQVRIIGluIGZpbGVpby5jIGlzIGNvdXBsZWQgd2l0aCAN Ck9fRElSRUNUT1JZLCBhbmQgdGhpcyBpcyBub3QgYWZmZWN0ZWQgYnkgdGhlIGJ1Zy4NCg0KQnV0 LCBpbiBhbnkgY2FzZSwgSSBhZ3JlZSB3aXRoIEVsaSdzIHBvaW50IHRoYXQgeW91ciBwYXRjaCBp cyB0b28gZHJhc3RpYy4gIEkgDQpkb24ndCBzZWUgaG93IG15IHBhdGNoIGlzIGludHJ1c2l2ZS4N Cg0KS2VuDQo= From unknown Fri Aug 15 21:26:15 2025 X-Loop: help-debbugs@gnu.org Subject: bug#36405: 26.2.90; O_PATH problem on some versions of Cygwin Resent-From: Paul Eggert Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sat, 29 Jun 2019 06:22:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 36405 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: To: Ken Brown Cc: Eli Zaretskii , "36405@debbugs.gnu.org" <36405@debbugs.gnu.org> Received: via spool by 36405-submit@debbugs.gnu.org id=B36405.15617892656066 (code B ref 36405); Sat, 29 Jun 2019 06:22:02 +0000 Received: (at 36405) by debbugs.gnu.org; 29 Jun 2019 06:21:05 +0000 Received: from localhost ([127.0.0.1]:43311 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1hh6jR-0001Zm-8n for submit@debbugs.gnu.org; Sat, 29 Jun 2019 02:21:05 -0400 Received: from zimbra.cs.ucla.edu ([131.179.128.68]:35766) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1hh6jN-0001Z2-LB for 36405@debbugs.gnu.org; Sat, 29 Jun 2019 02:21:03 -0400 Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id 1A112161D2F; Fri, 28 Jun 2019 23:20:56 -0700 (PDT) Received: from zimbra.cs.ucla.edu ([127.0.0.1]) by localhost (zimbra.cs.ucla.edu [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id Un9wEqb1DjwY; Fri, 28 Jun 2019 23:20:55 -0700 (PDT) Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id 6491E161D50; Fri, 28 Jun 2019 23:20:55 -0700 (PDT) X-Virus-Scanned: amavisd-new at zimbra.cs.ucla.edu Received: from zimbra.cs.ucla.edu ([127.0.0.1]) by localhost (zimbra.cs.ucla.edu [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id i1OowyDqDafx; Fri, 28 Jun 2019 23:20:55 -0700 (PDT) Received: from [192.168.1.9] (cpe-23-242-74-103.socal.res.rr.com [23.242.74.103]) by zimbra.cs.ucla.edu (Postfix) with ESMTPSA id 36987161D2F; Fri, 28 Jun 2019 23:20:55 -0700 (PDT) References: From: Paul Eggert Organization: UCLA Computer Science Department Message-ID: Date: Fri, 28 Jun 2019 23:20:54 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.7.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-Spam-Score: -2.3 (--) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -3.3 (---) Ken Brown wrote: > This hunk is not necessary. The only use of O_PATH in fileio.c is coupled with > O_DIRECTORY, and this is not affected by the bug. Thanks, I reverted that part of the change. I'll also follow up to Eli's note. From unknown Fri Aug 15 21:26:15 2025 X-Loop: help-debbugs@gnu.org Subject: bug#36405: 26.2.90; O_PATH problem on some versions of Cygwin Resent-From: Paul Eggert Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sat, 29 Jun 2019 06:27:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 36405 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: To: Eli Zaretskii Cc: 36405@debbugs.gnu.org, kbrown@cornell.edu Received: via spool by 36405-submit@debbugs.gnu.org id=B36405.15617895806508 (code B ref 36405); Sat, 29 Jun 2019 06:27:02 +0000 Received: (at 36405) by debbugs.gnu.org; 29 Jun 2019 06:26:20 +0000 Received: from localhost ([127.0.0.1]:43315 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1hh6oW-0001gt-1J for submit@debbugs.gnu.org; Sat, 29 Jun 2019 02:26:20 -0400 Received: from zimbra.cs.ucla.edu ([131.179.128.68]:36190) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1hh6oU-0001gh-DA for 36405@debbugs.gnu.org; Sat, 29 Jun 2019 02:26:18 -0400 Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id DED57161D2F; Fri, 28 Jun 2019 23:26:12 -0700 (PDT) Received: from zimbra.cs.ucla.edu ([127.0.0.1]) by localhost (zimbra.cs.ucla.edu [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id amScURrQLAUH; Fri, 28 Jun 2019 23:26:10 -0700 (PDT) Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id 250DA161D50; Fri, 28 Jun 2019 23:26:10 -0700 (PDT) X-Virus-Scanned: amavisd-new at zimbra.cs.ucla.edu Received: from zimbra.cs.ucla.edu ([127.0.0.1]) by localhost (zimbra.cs.ucla.edu [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id 56EkDVPOkj45; Fri, 28 Jun 2019 23:26:10 -0700 (PDT) Received: from [192.168.1.9] (cpe-23-242-74-103.socal.res.rr.com [23.242.74.103]) by zimbra.cs.ucla.edu (Postfix) with ESMTPSA id E4E36161D2F; Fri, 28 Jun 2019 23:26:09 -0700 (PDT) References: <9308fcb1-bb7e-229b-aacf-8c55db00fca6@cornell.edu> <83k1d6i5vl.fsf@gnu.org> From: Paul Eggert Organization: UCLA Computer Science Department Message-ID: Date: Fri, 28 Jun 2019 23:26:09 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.7.1 MIME-Version: 1.0 In-Reply-To: <83k1d6i5vl.fsf@gnu.org> Content-Type: multipart/mixed; boundary="------------A17F391C0F22491BC0E3E3C8" Content-Language: en-US X-Spam-Score: -2.3 (--) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -3.3 (---) This is a multi-part message in MIME format. --------------A17F391C0F22491BC0E3E3C8 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Eli Zaretskii wrote: > What problems did you see/envision on other platforms with the > original patch? Mainly the hassle of maintaining code with a lot of hard-to-read ifdefs in it. It's better if system-specific stuff is kept to a minimum in mainline code. Also, this O_PATH stuff is not that high of a priority, as the code works quite well in practice without O_PATH. (Also, if Cygwin botched O_PATH on FIFOs there's a reasonable chance it botched O_PATH elsewhere too. :-) How about something like the attached patch instead? It's simpler and should be a bit faster on Cygwin than the original patch. I haven't tested it. --------------A17F391C0F22491BC0E3E3C8 Content-Type: text/x-patch; name="cygwin.diff" Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename="cygwin.diff" diff --git a/configure.ac b/configure.ac index 8ff0e21fbf..a0e99ac393 100644 --- a/configure.ac +++ b/configure.ac @@ -5734,6 +5734,9 @@ AC_DEFUN AC_MSG_WARN([[building Emacs on Cygwin 1.5 is not supported.]]) echo ;; + cygwin,3.0.[0-8]'('*) + AC_DEFINE([HAVE_CYGWIN_O_PATH_BUG], 1, + [Define to 1 if opening a FIFO with O_PATH causes a hang.]);; esac # Remove any trailing slashes in these variables. diff --git a/src/dired.c b/src/dired.c index b8197d36a0..b700013f6a 100644 --- a/src/dired.c +++ b/src/dired.c @@ -41,10 +41,6 @@ #include "buffer.h" #include "coding.h" -#ifdef __CYGWIN__ -# undef O_PATH /* Buggy in Cygwin 3.0.0 through 3.0.7. */ -#endif - #ifdef MSDOS #include "msdos.h" /* for fstatat */ #endif @@ -941,7 +937,7 @@ file_attributes (int fd, char const *name, int err = EINVAL; -#ifdef O_PATH +#if defined O_PATH && !defined HAVE_CYGWIN_O_PATH_BUG int namefd = openat (fd, name, O_PATH | O_CLOEXEC | O_NOFOLLOW); if (namefd < 0) err = errno; --------------A17F391C0F22491BC0E3E3C8-- From unknown Fri Aug 15 21:26:15 2025 X-Loop: help-debbugs@gnu.org Subject: bug#36405: 26.2.90; O_PATH problem on some versions of Cygwin Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sat, 29 Jun 2019 07:08:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 36405 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: To: Paul Eggert Cc: 36405@debbugs.gnu.org, kbrown@cornell.edu Received: via spool by 36405-submit@debbugs.gnu.org id=B36405.156179202910089 (code B ref 36405); Sat, 29 Jun 2019 07:08:01 +0000 Received: (at 36405) by debbugs.gnu.org; 29 Jun 2019 07:07:09 +0000 Received: from localhost ([127.0.0.1]:43330 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1hh7S1-0002cf-4O for submit@debbugs.gnu.org; Sat, 29 Jun 2019 03:07:09 -0400 Received: from eggs.gnu.org ([209.51.188.92]:33573) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1hh7Rz-0002cT-BF for 36405@debbugs.gnu.org; Sat, 29 Jun 2019 03:07:07 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]:44363) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hh7Rt-0003Ej-G2; Sat, 29 Jun 2019 03:07:01 -0400 Received: from [176.228.60.248] (port=1785 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1hh7Rs-0003u9-Gi; Sat, 29 Jun 2019 03:07:01 -0400 Date: Sat, 29 Jun 2019 10:06:49 +0300 Message-Id: <83ef3chnue.fsf@gnu.org> From: Eli Zaretskii In-reply-to: (message from Paul Eggert on Fri, 28 Jun 2019 23:26:09 -0700) References: <9308fcb1-bb7e-229b-aacf-8c55db00fca6@cornell.edu> <83k1d6i5vl.fsf@gnu.org> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Spam-Score: -2.3 (--) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -3.3 (---) > Cc: 36405@debbugs.gnu.org, kbrown@cornell.edu > From: Paul Eggert > Date: Fri, 28 Jun 2019 23:26:09 -0700 > > Eli Zaretskii wrote: > > What problems did you see/envision on other platforms with the > > original patch? > > Mainly the hassle of maintaining code with a lot of hard-to-read ifdefs in it. > It's better if system-specific stuff is kept to a minimum in mainline code. I agree, of course. But in this case we are talking about adding 2 #ifdef's, so the situation is not much worse than it was before. > Also, this O_PATH stuff is not that high of a priority, as the code works quite > well in practice without O_PATH. It was evidently important enough for us to use it on platforms that support it. > How about something like the attached patch instead? It's simpler and should be > a bit faster on Cygwin than the original patch. I haven't tested it. Thanks, this is fine with me if it does the job. Ken? From unknown Fri Aug 15 21:26:15 2025 X-Loop: help-debbugs@gnu.org Subject: bug#36405: 26.2.90; O_PATH problem on some versions of Cygwin Resent-From: Ken Brown Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sat, 29 Jun 2019 18:04:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 36405 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: To: Eli Zaretskii , Paul Eggert Cc: "36405@debbugs.gnu.org" <36405@debbugs.gnu.org> Received: via spool by 36405-submit@debbugs.gnu.org id=B36405.156183139223541 (code B ref 36405); Sat, 29 Jun 2019 18:04:01 +0000 Received: (at 36405) by debbugs.gnu.org; 29 Jun 2019 18:03:12 +0000 Received: from localhost ([127.0.0.1]:44888 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1hhHgt-00067d-Gy for submit@debbugs.gnu.org; Sat, 29 Jun 2019 14:03:11 -0400 Received: from mail-eopbgr760091.outbound.protection.outlook.com ([40.107.76.91]:41542 helo=NAM02-CY1-obe.outbound.protection.outlook.com) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1hhHgr-00067Q-8h for 36405@debbugs.gnu.org; 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O_PATH problem on some versions of Cygwin Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sat, 29 Jun 2019 18:20:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 36405 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: To: Ken Brown Cc: eggert@cs.ucla.edu, 36405@debbugs.gnu.org Received: via spool by 36405-submit@debbugs.gnu.org id=B36405.156183239526815 (code B ref 36405); Sat, 29 Jun 2019 18:20:01 +0000 Received: (at 36405) by debbugs.gnu.org; 29 Jun 2019 18:19:55 +0000 Received: from localhost ([127.0.0.1]:44897 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1hhHx5-0006yQ-60 for submit@debbugs.gnu.org; Sat, 29 Jun 2019 14:19:55 -0400 Received: from eggs.gnu.org ([209.51.188.92]:36599) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1hhHx3-0006yE-5d for 36405@debbugs.gnu.org; Sat, 29 Jun 2019 14:19:54 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]:51553) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hhHww-0005rn-PF; Sat, 29 Jun 2019 14:19:46 -0400 Received: from [176.228.60.248] (port=3397 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1hhHwp-0001rw-Do; Sat, 29 Jun 2019 14:19:46 -0400 Date: Sat, 29 Jun 2019 21:19:11 +0300 Message-Id: <83mui0fe5c.fsf@gnu.org> From: Eli Zaretskii In-reply-to: <8590ea62-f4ff-053a-6f11-977edde598c0@cornell.edu> (message from Ken Brown on Sat, 29 Jun 2019 18:03:02 +0000) References: <9308fcb1-bb7e-229b-aacf-8c55db00fca6@cornell.edu> <83k1d6i5vl.fsf@gnu.org> <83ef3chnue.fsf@gnu.org> <8590ea62-f4ff-053a-6f11-977edde598c0@cornell.edu> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Spam-Score: -2.3 (--) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -3.3 (---) > From: Ken Brown > CC: "36405@debbugs.gnu.org" <36405@debbugs.gnu.org> > Date: Sat, 29 Jun 2019 18:03:02 +0000 > > > Thanks, this is fine with me if it does the job. Ken? > > Fine with me too, after a small tweak. Revised patch attached. Go ahead and push, then. Thanks.