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:subject:to:references:from:message-id:date :mime-version:in-reply-to:content-type; q=dns; s=default; b=skha gAxg2SQJVV2Z1s9z+AkkL2q6ipNi0JLMRZCPNqHL4fgTe9hKImwbi9JoztZY9ZcH DJrrCuYRAQ381P2vMt4AuR7FbccnW5+n1h5c/9RwF3+m52kV4TfU1A4/893IZrk3 aecKEdhYK15RhAEelA7o2Ra1RlZrbrpC299gTF4= 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:subject:to:references:from:message-id:date :mime-version:in-reply-to:content-type; s=default; bh=pRGY+NIJug aoXk+atTHY0SjKdbI=; b=GYDG98tvJOYo/9bs5oZdgzamWULZRtWSKr7I4RYgQ9 PW4ka2+Mw6vwjrzYM6VYSOq9KkLBLbouortoDWaw+dAFbameE7dI8GFLsgOojXGR AvF7z5u2Uhfoq9hnZalWw4sUmSUJkfpSdMw8NdaHCyHvGKBXviI2sVgs/M0DUiqd M= Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , 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=-1.9 required=5.0 tests=BAYES_00,RP_MATCHES_RCVD,SPF_HELO_PASS autolearn=ham version=3.3.2 spammy=blake, Blake, H*M:4929, H*c:application X-HELO: mx1.redhat.com DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 3515BC0CC61F Authentication-Results: ext-mx07.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx07.extmail.prod.ext.phx2.redhat.com; spf=fail smtp.mailfrom=eblake AT redhat DOT com Subject: Re: Extra CR symbol from backticks on Cygwin 2.9.0 To: cygwin AT cygwin DOT com, Nikolay Melekhin References: From: Eric Blake Openpgp: url=http://people.redhat.com/eblake/eblake.gpg Message-ID: <7ed18312-4929-8299-d186-9cb0aa541a93@redhat.com> Date: Mon, 11 Sep 2017 17:00:10 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.3.0 MIME-Version: 1.0 In-Reply-To: Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="wVdo3xfFh689DtqV73vvJ5BdLdn0tfW8S" X-IsSubscribed: yes --wVdo3xfFh689DtqV73vvJ5BdLdn0tfW8S Content-Type: multipart/mixed; boundary="GDTasafR8eHK4EXxs9BNMr1sGfmjn6F0B"; protected-headers="v1" From: Eric Blake To: cygwin AT cygwin DOT com, Nikolay Melekhin Message-ID: <7ed18312-4929-8299-d186-9cb0aa541a93 AT redhat DOT com> Subject: Re: Extra CR symbol from backticks on Cygwin 2.9.0 References: In-Reply-To: --GDTasafR8eHK4EXxs9BNMr1sGfmjn6F0B Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable On 09/11/2017 04:27 PM, Nikolay Melekhin wrote: >=20 > I'd expect that Cygwin must remove CRLF symbols from backtick results, You expected wrong - by default Cygwin does the same as Linux, which does NOT remove CR from command substitution (only LF). > but remove only LF symbol. It gets different results on Windows and > Linux. Result on Windows has additional CR symbol and for example > string comparision, which is working in Linux, fails in Windows. It is NOT a bug in Cygwin, but in your failure to sanitize your input. You'd get the same behavior on Linux if you pass in CR bytes. That said, >=20 > Is any kind of an option/setting which removes such CRs or it is a bug > in Cygwin? Read the release announcements: Cygwin bash DOES have an 'igncr' shell option (set -o igncr) that does exactly what you are asking for - it makes bash ignore CR characters in command substitutions and other places: https://cygwin.com/ml/cygwin-announce/2017-01/msg00047.html The option is not on by default, but exists because it is a common desire when you can't be bothered to otherwise sanitize CR out of your input stream. --=20 Eric Blake, Principal Software Engineer Red Hat, Inc. +1-919-301-3266 Virtualization: qemu.org | libvirt.org --GDTasafR8eHK4EXxs9BNMr1sGfmjn6F0B-- --wVdo3xfFh689DtqV73vvJ5BdLdn0tfW8S Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Comment: Public key at http://people.redhat.com/eblake/eblake.gpg Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQEzBAEBCAAdFiEEccLMIrHEYCkn0vOqp6FrSiUnQ2oFAlm3B2oACgkQp6FrSiUn Q2rdkggAhLwaCnap8NDEvs0Il3fSjdzhuaRCvoYWmG6O8VB8J1wcaywsFAMqSVu0 U129ITQV72wJV0Niiv3OWAM+cRerK3+EyF+5A4auX+VIbv+N0m4O1ddwRQVF1d78 5s4PLDjV6B/K2NqwO7ddBi9sHgCghrlyA0uA1WHzEI9ZDhLFn24sZgo2xxP2FNH+ d9DGLphFSvsG0NioI6Ye7ArOjc2YY8hAfprJmvhNiyJqkyu2dGRZLrGaNF579FUR evSbtSqn07AkaF7LxFbVCZSxfM4mk9VMXTcHFu0Crs4NQRn7Q2LTRnvoiO8MbpMk ih5gOig5JvjTYgBeS3NuckS7Yj8ObA== =7jht -----END PGP SIGNATURE----- --wVdo3xfFh689DtqV73vvJ5BdLdn0tfW8S--