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Subject:	Re: Bash heredoc on FD 3
To:	cygwin AT cygwin DOT com
References:	<5c0427c5 DOT 1c69fb81 DOT d71e5 DOT c8ec AT mx DOT google DOT com> <c6d1ba2d6a7a0daa32aee92f806a30dd AT smtp-cloud7 DOT xs4all DOT net>
From:	cyg Simple <cygsimple AT gmail DOT com>
Message-ID:	<f720272e-c246-e807-d9a5-1cbccbd36a62@gmail.com>
Date:	Tue, 4 Dec 2018 09:21:55 -0500
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On 12/4/2018 7:13 AM, Houder wrote:
> On Sun, 02 Dec 2018 10:43:17, Steven Penny  wrote:
>> Using this file:
>>
>>      $ cat hello.sh
>>      awk -f /dev/fd/3 3<<eof
>>      BEGIN {
>>        print "hello world"
>>      }
>>      eof
>>
>> it runs as expected with Dash:
>>
>>      $ dash hello.sh
>>      hello world
>>
>> However it fails with Bash:
>>
>>      $ bash hello.sh
>>      awk: fatal: can't open source file `/dev/fd/3' for reading (No such file or
>>      directory)
>>
>> I tried also with Debian and both Dash and Bash work as expected. What is
>> causing Cygwin Bash to fail here?
> 
> File to which symlnk /dev/fd/3 refers has "gone"; different from Linux, where
> the file is "deleted", but still "available".
> (note: dash uses a different implementation)

Dash is faster in processing the data but can be made to fail if you add 
-d to the ls commands you're using.

-- 
cyg Simple

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