X-Recipient: archive-cygwin AT delorie DOT com
DomainKey-Signature: a=rsa-sha1; c=nofws; d=sourceware.org; h=list-id
	:list-unsubscribe:list-subscribe:list-archive:list-post
	:list-help:sender:to:subject:from:message-id:date:mime-version
	:content-type; q=dns; s=default; b=e0dzeHmYpHYEKd6p3Culzfh+RDcyB
	MBDpXOCqUOhcDYuW9uTWPCelFxrOx652uQUFmjt/mEdfkXPzZjQusoq1EiAJFTMC
	OJSiAxZlkNnsQHxDWgzN98UX3dKugzrMFt2N1pkzAgdk+25aFtGQFXDmNt9vYpGA
	+dw/Jt8813tHQE=
DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=sourceware.org; h=list-id
	:list-unsubscribe:list-subscribe:list-archive:list-post
	:list-help:sender:to:subject:from:message-id:date:mime-version
	:content-type; s=default; bh=gDzCF4mYGSbdui7OsYiRVq56R6A=; b=EZA
	oD8Ryn7OM99jhay2i7eb2M4mzwZ64ruKTsqzKmOJqfMTHx0zJCCJzZqLvKDvRspj
	cfRVx2kbwvM2Td04XqPzJHgagPbfhxymJQxocIWZqGVwH5N9+h94fAvNw+aujvok
	lSkLrgLVJ25au10N4yLUIozj9wj8zirMmtqzTLfw=
Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Id: <cygwin.cygwin.com>
List-Subscribe: <mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive: <http://sourceware.org/ml/cygwin/>
List-Post: <mailto:cygwin AT cygwin DOT com>
List-Help: <mailto:cygwin-help AT cygwin DOT com>, <http://sourceware.org/ml/#faqs>
Sender: cygwin-owner AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
Delivered-To: mailing list cygwin AT cygwin DOT com
Authentication-Results: sourceware.org; auth=none
X-Virus-Found: No
X-Spam-SWARE-Status: No, score=1.1 required=5.0 tests=AWL,BAYES_00,FREEMAIL_ENVFROM_END_DIGIT,FREEMAIL_FROM,KAM_FROM_URIBL_PCCC,RCVD_IN_DNSWL_LOW,SPF_PASS,URIBL_SBL autolearn=no version=3.3.2
X-HELO: mail-la0-f41.google.com
X-Received: by 10.152.120.8 with SMTP id ky8mr55501467lab.118.1426552470481;        Mon, 16 Mar 2015 17:34:30 -0700 (PDT)
To: cygwin AT cygwin DOT com
Subject: Changes in process spawning break perl system() function
From: LRN <lrn1986 AT gmail DOT com>
message-id: <5507768E.20108@gmail.com>
Date: Tue, 17 Mar 2015 03:34:22 +0300
user-agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:39.0) Gecko/20100101 Thunderbird/39.0a1
mime-version: 1.0
Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="iu3UNA4TQ8wJvp9hM03CJxoEBCRNPHl8e"
X-IsSubscribed: yes

--iu3UNA4TQ8wJvp9hM03CJxoEBCRNPHl8e
Content-Type: multipart/mixed;
 boundary="------------060100040605080304060608"

This is a multi-part message in MIME format.
--------------060100040605080304060608
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: quoted-printable

How to reproduce:
1) create a shell script (say, /usr/bin/shellscript) containing this:

#!/bin/sh
echo ${0##*/}

2) create a symlink (say, /usr/bin/asymlink) that points to shellscript

3) create a perl script (say, /usr/bin/perlscript) containing this:

#! /usr/bin/perl -w
system '/usr/bin/asymlink';

4) run /usr/bin/perlscript

Expected results:
"asymlink" should be echoed by the shellscript when it is run by perlscript

Actual results:
"shellscript" is echoed instead

This affects 1.7.35.

I've tried various cygwin dll snapshots, everything is fine (symlink name is
echoed) with cygwin1-20150210.dll, cygwin1-20150211.dll breaks things first=
 (a
full DOS path to shellscript is echoed), then from cygwin1-20150215.dll and
onward the target script name is echoed, as described above.

Symlink can be a Cygwin symlink or a native symlink, doesn't matter.

The use-case for this is autoconf wrapper (a shell script) that is being ru=
n by
autoreconf (a perl script) and uses the contents of $0 to find different
versions of autoconf, expecting $0 to be something like /usr/bin/autoconf, =
but
getting things like /usr/share/autotools/ac-wrapper.sh instead.

--=20
O< ascii ribbon - stop html email! - www.asciiribbon.org

--------------060100040605080304060608
Content-Type: application/pgp-keys;
 name="0x922360B0.asc"
Content-Transfer-Encoding: quoted-printable
Content-Disposition: attachment;
 filename="0x922360B0.asc"

-----BEGIN PGP PUBLIC KEY BLOCK-----=0A=
Version: GnuPG v1.4.11 (MingW32)=0A=
=0A=
mQENBE48DHkBCADjAv/EeFMN+i5XDN2WjSBU/yHbJlIG93/Hpj7Hee65qr82O9us=0A=
n3t4W1bk2+YwGBrFdfVlesHF4DObckXveayC+IulVvTJwZhR8igVENvWjIo6oF1N=0A=
1B3GV/c8zVCnHdkF0+vYJ9akX6DZf8KvBqKZapK1kc3tll0o+kS9lwNfpWRarUpQ=0A=
SBTw2uq+FUEsO3pwVAyvwom4b7AB6fz1tpyl28dOaNDKr2W55ZDPC8aM5PPe/kiH=0A=
n3ylOwpgXYqZLhIyJStqL/KcZ76y8o/gDXnilFRLwXu9CbXjapo7MARXByuSVMfb=0A=
PHa3XNj5JCzlv4GhEF4HOp4qoVRk8YASTqf/ABEBAAG0F0xSTiA8bHJuMTk4NkBn=0A=
bWFpbC5jb20+iQE9BBMBAgAnAhsjBQkJZgGAAh4BAheABQJT5qxpBQsJCAcDBRUK=0A=
CQgLBRYCAwEAAAoJEOs4Jb6SI2CwBNMIAKu3L9CGoTlJHZ/0G5AbbcP9zeiIkKkN=0A=
yvi1XszHiDz1kaESQYjpDsEWeHQutEhmnK5DNRyA6VV7Tcc49+1luq5Uf1kb8gGr=0A=
2mbF+eLG0Rv/WGoi/Aa4eH7K9dH2BSOUn+eX3Ft/HbBp9ZWCBRnABuO4oKmS+zfd=0A=
O9wMaQJkRRnwo151TNVMpWIO/kE7t4YeJyV/fUdYsMzlH53hzXnCM5DQ3ovje7NI=0A=
0prrSaqrthS0W5ELKZnb7PDY7pII0xh5/+u+f9Vs0mdMjvYZT42DiJnHvtfLEo1h=0A=
7KwLkC1lltZ/eaQOKFAszDzi2KoilSY/29mK7wLCd1TFJjklJNQqyxu5AQ0ETjwM=0A=
eQEIAKpvqHog2hpurRnsF6IKQtqR7JXYie9mvNoPW7XWmN3TtkHp5zrUG4SkR4dU=0A=
CTXxO82kMlwC94s79YJNTr30fahW6BVe72aZ+1D5qJcHk0CeHj56lri2kPOxyZXo=0A=
19Rhw43YtGZNvkNOg5xmMIzxUbMnxRTSppEFi0YQ+cCjnQksHiQPcCsb5bow53Ii=0A=
M9pICELT0d3nB5iDFCQb3oiXdRitDJJtZ97vOUE+xpUeYTcHXZyLmXYyMA7cFa/b=0A=
wRwj/5xofXYE0WlnHDn+0QOTf1BOGaWH1eZqYYBVKegKXW65Y7UOU4f0pZQUQ+FQ=0A=
wbwnSDlFuJPKA5MDgDczqtAVtNsAEQEAAYkBJQQYAQIADwUCTjwMeQIbDAUJCWYB=0A=
gAAKCRDrOCW+kiNgsJ2FCACaycPmmvwar2FwTbT+/OFM9rt9KQ6JCldNSePGNzHE=0A=
k0WBu5HyzgGcuOqoQSIwPHGnu2zkZl0PMW/WW9648a4OBuK08zNmypHXQw3fG0nG=0A=
KNsO6j86tOLINS6p/P4vMcF8Fz6ZdIwSj8oXnuku0C0nkLB/ja/VZk1wcI30ulJF=0A=
A2EhgLWIXZaTBlWR4KitGiGL7yzpUzBarPE8YFZLF+rfqu7NlxeG3NbBA/5UmH6r=0A=
FL5Cva/ajOJW2CtGyuROTYhqBfolxZtfSHHj1wOAlc+dA0utIW4NDbIyZxCoxDTF=0A=
/lUIjgj/Xu0IRIsX5m6TbBl40LH81JI0g1750FJfP4de=0A=
=3DaWCf=0A=
-----END PGP PUBLIC KEY BLOCK-----=0A=

--------------060100040605080304060608--

--iu3UNA4TQ8wJvp9hM03CJxoEBCRNPHl8e
Content-Type: application/pgp-signature; name="signature.asc"
Content-Description: OpenPGP digital signature
Content-Disposition: attachment; filename="signature.asc"

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.11 (MingW32)

iQEcBAEBAgAGBQJVB3aTAAoJEOs4Jb6SI2CwnPQH/ixDr270UhaQcWZpOcp1fypz
JrIEe7y9iXaRg2HOz7O+0yYNtRJTK9aMMZFGMNOCRZ9fUyvAadUl+rMzZDVe7/ZH
swfLZykxoPOqL6USogIkYHibdkZrl1fC5sZygAlZB2bhtb9wcwxn8r1GqEtQ+RzW
eoybGaqa6qr/MzIvpju9r+35A+2/x8GUMYn3Rd4AXpOcmQCqd3SaCInFnDNRvoIp
AjjEieRAc1NXxPNrfnKFJB5Q4TXOiZRKSu+3U2gujJVOP0N5s5vVjP+bsqz/4bwS
Izfmk1Kyu9ZOyf285ubCXPLzYfcho1pgbid0u5O+0JRmjpuYTZEsgarblh6cmYQ=
=SPXe
-----END PGP SIGNATURE-----

--iu3UNA4TQ8wJvp9hM03CJxoEBCRNPHl8e--