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| 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> |
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| Date: | Mon, 31 Dec 2018 07:47:23 -0700 |
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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
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