DMARC-Filter:	OpenDMARC Filter v1.4.2 delorie.com 5559TEpd1601574
Authentication-Results:	delorie.com; dmarc=pass (p=none dis=none) header.from=cygwin.com
Authentication-Results:	delorie.com; spf=pass smtp.mailfrom=cygwin.com
DKIM-Filter:	OpenDKIM Filter v2.11.0 delorie.com 5559TEpd1601574
Authentication-Results:	delorie.com;
	dkim=pass (1024-bit key, unprotected) header.d=cygwin.com header.i=@cygwin.com header.a=rsa-sha256 header.s=default header.b=eONteL6B
X-Recipient:	archive-cygwin AT delorie DOT com
DKIM-Filter:	OpenDKIM Filter v2.11.0 sourceware.org 39DF53857015
DKIM-Signature:	v=1; a=rsa-sha256; c=relaxed/relaxed; d=cygwin.com;
	s=default; t=1749115752;
	bh=VPAYyN2CHneaMXpMVnT3KRpp2fXKnxPLfOn+t49sG7A=;
	h=References:In-Reply-To:Date:Subject:To:List-Id:List-Unsubscribe:
	List-Archive:List-Post:List-Help:List-Subscribe:From:Reply-To:
	From;
	b=eONteL6B4RZVoTA0QlHrtgGN6FKPkwR19nJWsd6BlDVQqYdkwIRi900PSHo7xf9AH
	jn8ua0y3garlN7l8QoLFfvoBUDqP4PUy7jFlrzf2/3bah3zMaMqvnH7szZywsnf2SQ
	Bo0kTF0ZOS9fW3nJS7EB3Ikp/PkzAT/CJrpZiIAg=
X-Original-To:	cygwin AT cygwin DOT com
Delivered-To:	cygwin AT cygwin DOT com
DMARC-Filter:	OpenDMARC Filter v1.4.2 sourceware.org A42E93858C42
ARC-Filter:	OpenARC Filter v1.0.0 sourceware.org A42E93858C42
ARC-Seal:	i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1749115725; cv=none;
	b=XM60CLvP+aLeQGmxQOz2aIMgJfScGbj9FU5KdkXMGpK/pzvRs2floYZAHSgVi84hre6bIztPi43Dk28tf631kvzN2uMYMdVypkMcAY/5fSXuVR5zoYgHHt0zYoIKKqM5f6v04fQpxqj5kF5jrtOvKIxkmX7HsLQjXTjiXMO1vw4=
ARC-Message-Signature:	i=1; a=rsa-sha256; d=sourceware.org; s=key;
	t=1749115725; c=relaxed/simple;
	bh=hs6yMA+PQKN+N8h++JoyQSzwd2L7pVa1jx3lygO2b8s=;
	h=DKIM-Signature:MIME-Version:From:Date:Message-ID:Subject:To;
	b=QY92FLNaKaeu7p2EZXyzjRC+By/4obBHmZ6May2hNsD46TKIKGvuRSKOD56jDvFimwYvqNAnwrQXBaLAFd4dn278PaTB7rVlEN0iCwEIahQAgsbaKDesHOcveghhJOR3CpRvtbD/sOv+OMqWRed6sM+ylMXt1zXOC4NgWRcDedk=
ARC-Authentication-Results:	i=1; server2.sourceware.org
DKIM-Filter:	OpenDKIM Filter v2.11.0 sourceware.org A42E93858C42
X-Google-DKIM-Signature:	v=1; a=rsa-sha256; c=relaxed/relaxed;
	d=1e100.net; s=20230601; t=1749115722; x=1749720522;
	h=content-transfer-encoding:to:subject:message-id:date:from
	:in-reply-to:references:mime-version:x-gm-message-state:from:to:cc
	:subject:date:message-id:reply-to;
	bh=jcbfMUzSi+n99EkCJeFfxmaB7vjoS54sMI/D+xGGwWI=;
	b=Wkom1yOiISBJyuvOHbecG17GBGMTINLwjdSbdB0dZuj/Qxd3Y8rbD/0chAub6hX/uD
	JcN1bllTOPHIdEERR/F8BD9WBXSf3WJtLtAEs10Ezu2ZgAjd67CkHh8V2K6/UgDaNJHs
	nr4WvxebMlSWkLdnIFESccQxNf++GM5LDHT8ejJpRJboFNVFM17jTgvn8ZZ0hTJtNLg8
	BY72TU1gvF9rGQP5yFp3hlJZgvt4Lk+M538Ws8zFbkjdplQEIUD7yLNvzyK2tG91vzKP
	voiAnFvnxcNTJxPDDj77sSWhopfmaRU7qfIoihrD73t62H7MXXZ8S7HMcp+DgpwdFSED
	d2Ow==
X-Forwarded-Encrypted:	i=1;
	AJvYcCWTSf0cRYYYgIX/cImkKZBDbC6kewXChMvSHriN7wqPqRKeBZ81Ji4o/QfcNw8evHOCLBTzRbYC22on7s0S8g==@cygwin.com
X-Gm-Message-State:	AOJu0Yy3LL1JUkxOtHVFfzghlwe3wBbKDbfMkBL29NoOpTEFH0+WhOq0
	VrDlENvQiJWLzgEYuXSCkdF73OT+GeMZJ2PXroIcOEiC65LDkCkgAsm106bGCYkRtd6/meHIbfO
	rkvQeLhs3vgi5Cpx2DQ+c5jgnBJKGfwdf+Au8
X-Gm-Gg:	ASbGncvWhDGluX1HQ0Xv39Lc6bu++tBX9h08Zy6/+H4AIkqFjxHWpRj23Stns+ETTY7
	dNCYluBQeeXO8sRuae1yNCHiTWzUWvoLIxRcm/YZ5fi6aqpCVJT1e92oXsapB5PYQhDkv3As6ab
	6gUafJKV9ZRilnyO1Ght7HfNTzEU3Gaml4
X-Google-Smtp-Source:	AGHT+IHzl7VE8Q85yZF6yJFEO19uYfmU4Y72pflpz59kmlX70U3X/3Cponu/AH//kXpww4M7bnE3s9/53Xt+yHHJNU0=
X-Received:	by 2002:a05:6402:2344:b0:606:cef8:a028 with SMTP id
	4fb4d7f45d1cf-606ea3aff44mr5961326a12.22.1749115721445; Thu, 05 Jun 2025
	02:28:41 -0700 (PDT)
MIME-Version:	1.0
References:	<CAHnbEGKpoM8q6bm8iB-p4rwfd_KO4Bj1iad-kmL8tyv43uZbzw AT mail DOT gmail DOT com>
In-Reply-To:	<CAHnbEGKpoM8q6bm8iB-p4rwfd_KO4Bj1iad-kmL8tyv43uZbzw@mail.gmail.com>
Date:	Thu, 5 Jun 2025 11:28:04 +0200
X-Gm-Features:	AX0GCFuiV0KeqCjxyD-uk8G9b97prHY0VQwWWJ6rWeu4bMpaipT66wgWJzrrRe0
Message-ID:	<CAHnbEGLdBE4Y+guRz_sA5hRbm9taf_ZtjsuJQSj13nUmToxz=w@mail.gmail.com>
Subject:	Re: Cygwin 3.7: Increase SYMLOOP_MAX?
To:	cygwin AT cygwin DOT com, cygwin-patches AT cygwin DOT com
X-BeenThere:	cygwin AT cygwin DOT com
X-Mailman-Version:	2.1.30
List-Id:	General Cygwin discussions and problem reports <cygwin.cygwin.com>
List-Archive:	<https://cygwin.com/pipermail/cygwin/>
List-Post:	<mailto:cygwin AT cygwin DOT com>
List-Help:	<mailto:cygwin-request AT cygwin DOT com?subject=help>
List-Subscribe:	<https://cygwin.com/mailman/listinfo/cygwin>,
	<mailto:cygwin-request AT cygwin DOT com?subject=subscribe>
From:	Sebastian Feld via Cygwin <cygwin AT cygwin DOT com>
Reply-To:	Sebastian Feld <sebastian DOT n DOT feld AT gmail DOT com>
Sender:	"Cygwin" <cygwin-bounces~archive-cygwin=delorie DOT com AT cygwin DOT com>
X-MIME-Autoconverted:	from base64 to 8bit by delorie.com id 5559TEpd1601574

On Thu, Apr 10, 2025 at 8:14 PM Sebastian Feld
<sebastian DOT n DOT feld AT gmail DOT com> wrote:
>
> Could the maximum symlink depth in Cygwin please be increased for
> cygwin 3.7? We're regularly hitting that limit (seems to be 10).
>
> What is the maximum number of symlink recursion? Rumor is that this is
> 32, but I cannot find it in any windows header.

This would be my proposed patch:
---cut---cut---cut---
diff --git a/winsup/cygwin/include/cygwin/limits.h
b/winsup/cygwin/include/cygwin/limits.h
index 204154da9..c61466368 100644
--- a/winsup/cygwin/include/cygwin/limits.h
+++ b/winsup/cygwin/include/cygwin/limits.h
@@ -43,7 +43,13 @@ details. */
#define __SEM_VALUE_MAX 1147483648
#define __SIGQUEUE_MAX 1024
#define __STREAM_MAX 20
-#define __SYMLOOP_MAX 10
+/* __SYMLOOP_MAX
+   https://learn.microsoft.com/en-us/windows/win32/fileio/reparse-points
+   ... There is a limit of 63 reparse points on any given path.
+   NOTE: The limit can be reduced depending on the length of the
+   reparse point. For example, if your reparse point targets a fully
+   qualified path, the limit becomes 31. */
+#define __SYMLOOP_MAX 31
#define __TIMER_MAX 32
#define __TTY_NAME_MAX 32
#define __FILESIZEBITS 64
---cut---cut---cut---

How can I get this patch committed?

Sebi
-- 
Sebastian Feld - IT security consultant

-- 
Problem reports:      https://cygwin.com/problems.html
FAQ:                  https://cygwin.com/faq/
Documentation:        https://cygwin.com/docs.html
Unsubscribe info:     https://cygwin.com/ml/#unsubscribe-simple

- Raw text -