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
	:content-transfer-encoding; q=dns; s=default; b=XCM2d93QQ1CJD0RX
	csDErQi3jBxm7H4BkmIFBIIdUHfzvlEVBGvAxJd3SPCnfYSup4YilkzAs3q7EUQn
	55hVf+oy1KjB1Y7cRpJ/oS66ecThnZ1zcnR9l08alycpxREqC5+bc8L8dSQPg4b1
	jULkFqt8NMsTm5peKUQB/tAbfLQ=
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
	:content-transfer-encoding; s=default; bh=7mLfkgEj32jA2E1sinMCct
	AYJh8=; b=mJSXlctt0UjudroGvPf+srXskQlA/8hUri58oENFmEGYV76Af1NHbb
	TVx1/8rb3NFRrJCm2ae5KiSraR4udVfegeoVr8OvXIoyEpZuEY+wJ+Krsxxz3ahu
	ef+uA0rQ5cr7IUTrp0OcDcKWBjrDka11iPMT3z9FjvDMt5VjqrWBk=
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=-6.9 required=5.0 tests=BAYES_00,GIT_PATCH_2,SPF_PASS autolearn=ham version=3.3.2 spammy=Hx-languages-length:1460, proxy, HContent-Transfer-Encoding:8bit
X-HELO:	mail.avenger.ws
DKIM-Signature:	v=1; a=rsa-sha256; c=relaxed/simple; d=avenger.ws; s=ethereal; t=1532134758; bh=BiOozfM9WYsO+4ieRHHqLSIQtdC8UjDCkraR4WY3gpQ=; h=Subject:To:References:From:Date:In-Reply-To; b=OJaxUm/9BcRNtdzBNQvCcpLlce1hxejNOsbHYX1IQryhYtYC51ZnObXzqadNd8m6q eMVGrOf/aQ6KSSezpgWIphxVnNOD9u980m1CAzyPoDaTmcxiJflEO+d1jdhErcdqhs x5K7sUjpN/QIvHYJWf14MUrnnFORznFL3TAOcpCc=
Subject:	Re: Why is stdin always a pipe?
To:	cygwin AT cygwin DOT com
References:	<CAJ+sA06u+pfPpTeFDQYaaT52c5_yz98i+MaTH28DCJoZkVc7=g AT mail DOT gmail DOT com> <e61f4fcb-96cd-699b-85b8-314f1ff96e2e AT gmail DOT com> <CAJ+sA06X2dvZtCr7B2rLOH615++eG+s5QsYVg-nOqRd_4HMZyQ AT mail DOT gmail DOT com> <d9aa837e-a906-784d-d90b-1478c65c19db AT SystematicSw DOT ab DOT ca>
From:	Heavenly Avenger <avenger AT avenger DOT ws>
Message-ID:	<6a6289ef-a8fe-9faa-ebf5-04e7a5fbe8c6@avenger.ws>
Date:	Fri, 20 Jul 2018 21:59:48 -0300
User-Agent:	Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1
MIME-Version:	1.0
In-Reply-To:	<d9aa837e-a906-784d-d90b-1478c65c19db@SystematicSw.ab.ca>
X-IsSubscribed:	yes

My results match Brian Inglis', not João Eiras'. I run cygwin from a 
putty session (using putty's cygtermd little proxy) if that matters.


On 7/20/2018 11:52 AM, Brian Inglis wrote:
> On 2018-07-20 07:17, João Eiras wrote:
>>>> $ [[ -p /dev/stdin ]] && echo pipe || echo nopipe
>>>> nopipe
>> Interesting, it's always a pipe for me. What about ls ?
>>
>> $ ls -l /dev/stdin
>> prw------- 1 user None 0 Jun  4 15:54 /dev/stdin
> Are you using a terminal that does not provide a console interface?
> That is a pipe; Cygwin terms look like this:
>
> $ ll -go /dev/std*; ll -go /proc/self/fd/[012]; ll -go /dev/pty?
> lrwxrwxrwx 1 15 May 14  2013 /dev/stderr -> /proc/self/fd/2
> lrwxrwxrwx 1 15 May 14  2013 /dev/stdin -> /proc/self/fd/0
> lrwxrwxrwx 1 15 May 14  2013 /dev/stdout -> /proc/self/fd/1
> lrwxrwxrwx 1 0 Jul 20 08:18 /proc/self/fd/0 -> /dev/pty0
> lrwxrwxrwx 1 0 Jul 20 08:18 /proc/self/fd/1 -> /dev/pty0
> lrwxrwxrwx 1 0 Jul 20 08:18 /proc/self/fd/2 -> /dev/pty0
> crw--w---- 1 136, 0 Jul 20 08:18 /dev/pty0
> crw--w---- 1 136, 1 Jul 20 08:18 /dev/pty1
> $ for fd in 0 1 2 3; do test -t $fd; echo fd $fd term $?; done
> fd 0 term 0
> fd 1 term 0
> fd 2 term 0
> fd 3 term 1
> $ for f in /dev/{std*,pty?}; do test -p $f; echo file $f pipe $?; done
> file /dev/stderr pipe 1
> file /dev/stdin pipe 1
> file /dev/stdout pipe 1
> file /dev/pty0 pipe 1
> file /dev/pty1 pipe 1
>
> where ptys are terms and are not pipes.
>


--
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

- Raw text -