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:reply-to:subject:to:references:from:message-id
	:date:mime-version:in-reply-to:content-type
	:content-transfer-encoding; q=dns; s=default; b=Ht/IR9Zf7we3A01w
	QwhOLy7XsKVKtjpMh9yhlVBzApxdn2bwgICPjlPcXRK2UNVbLOl0DU/vYu8lhxal
	LI7NHz0KslHfz/RQ2UyVxBeF0jMifH3AnSFjugs/6QbvDjnt1Lz8yW+mCzePOf1P
	nlLOfyxOV6iteTAFvDGWa9yg/ds=
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:reply-to:subject:to:references:from:message-id
	:date:mime-version:in-reply-to:content-type
	:content-transfer-encoding; s=default; bh=sT4KfYIsNQZDfRFcpHk0sa
	yic4Q=; b=ict0j5j4o+d8zVfgrw8AR/RpImDrkqVs0HzbIyrHrd2TkrLMDwB5fL
	RbTZRPCc0QQ/NBvZYmA26yqkA/JJWgENab850gPMwFNG1pm5uV7sgbSg0E5kPFwK
	ZUzG+wd+pdzMAu7WHNFMlIxPb3Cdin6girHOlV+FnLhfECzFgBTnQ=
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-Spam-SWARE-Status: No, score=-1.6 required=5.0 tests=BAYES_00,KAM_LAZY_DOMAIN_SECURITY,RCVD_IN_DNSWL_LOW autolearn=no version=3.3.2 spammy=canada, Canada, disturbing, H*F:D*ca
X-HELO: smtp-out-so.shaw.ca
Reply-To: Brian DOT Inglis AT SystematicSw DOT ab DOT ca
Subject: Re: gnanny: tr: warning: an unescaped backslash at end of string is not portable
To: cygwin AT cygwin DOT com
References: <5C29F63E DOT 9010606 AT tlinx DOT org> <eeab5b48-e8a0-6d6c-303e-835edd36ac5b AT cs DOT umass DOT edu>
From: Brian Inglis <Brian DOT Inglis AT SystematicSw DOT ab DOT ca>
Openpgp: preference=signencrypt
Message-ID: <2716611a-829f-7588-7533-b03ff9d2060b@SystematicSw.ab.ca>
Date: Mon, 31 Dec 2018 07:47:23 -0700
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0
MIME-Version: 1.0
In-Reply-To: <eeab5b48-e8a0-6d6c-303e-835edd36ac5b@cs.umass.edu>
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 8bit
X-IsSubscribed: yes

On 2018-12-31 05:57, Eliot Moss wrote:
> On 12/31/2018 5:58 AM, L A Walsh wrote:
>> This is being run on cygwin w/bash, version 4.4.12(3)-release.
>> Have a table of windows files, sample line (it's all 1 line):
>>>  cat test
>> D,"c:\windows\system32\FMS.DLL",2010-11-20 19:24:33,2010-11-20
>> 03:59:27,93696,A,0x00024E23,0x00024E23,x86,GUI,"CV",0x04480000,Unknown,0x00019000,Not
>> Loaded,1.1.6000.16384,1.1.6000.16384,6.1,9.0,6.1,6.1
>> I run 'tr' to switch around the backslashes to slashes:
>>>  tr '\' '/' <test
>> tr: warning: an unescaped backslash at end of string is not portable
>> D,"c:/windows/system32/FMS.DLL",2010-11-20 19:24:33,2010-11-20
>> 03:59:27,93696,A,0x00024E23,0x00024E23,x86,GUI,"CV",0x04480000,Unknown,0x00019000,Not
>> Loaded,1.1.6000.16384,1.1.6000.16384,6.1,9.0,6.1,6.1
>> 1) First question: what unescaped backslash?  The '\n is escaped via the
>> surrounding quotes.
>> 2) how should one escape it?
>> Is this a bug?
> It is referring to your input '\' and would prefer '\\'.

The problem is in your command line argument single backslash
info/man tr
tr accepted common character escapes, and now also classes and equivalences in
sets to support utf8 and other extended charsets e.g.

	$ tr '\' /
	tr: warning: an unescaped backslash at end of string is not portable
	^D

use	$ tr '\\' /

	$ tr \\ /
	tr: warning: an unescaped backslash at end of string is not portable
	^D

use	$tr \\\\ /

-- 
Take care. Thanks, Brian Inglis, Calgary, Alberta, Canada

This email may be disturbing to some readers as it contains
too much technical detail. Reader discretion is advised.

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