From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from mail-pg0-f41.google.com ([74.125.83.41]) by ur; Mon Mar 27 23:33:46 EDT 2017
Received: by mail-pg0-f41.google.com with SMTP id 21so59350912pgg.1
        for <9front@9front.org>; Mon, 27 Mar 2017 20:33:44 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
        d=gmail.com; s=20161025;
        h=mime-version:subject:from:in-reply-to:date
         :content-transfer-encoding:message-id:references:to;
        bh=wLIeYKT2w3lkgXlTD6cSE6fVa2jXLwldf0MItYC7uO0=;
        b=t9TvZ3P54dxWT6xqf89rFDJzyzpRPeUPr+LT+g8IbGBKnCYjgGOfDR9mvP1C/2xMNa
         GcvmqxlIJyuyhlYa3nqgh7c5UeVVzI4eayeQtvxDx+eGJWu0/0GrGmTg1JTULVzi2Qdn
         B+TDHVCpkX3hJzwE0bhnm9qIbh3BEG2NnKYVOGPpN8SORXtxdjTEWsupNpeCtSc8VyKi
         nST3/qCjjP2++2BGV4RIAR63REdzI4PBHRSUmTCm/o+QEHMqqJ/YWY+xZONZIFU8Feqe
         JRdGJUtBySRc+Sl8rXgoKtw3QwszWLa1HkL8R2qyOMt9nvRd1i2Aw1ZbsOxZW/Lripwx
         I1TA==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
        d=1e100.net; s=20161025;
        h=x-gm-message-state:mime-version:subject:from:in-reply-to:date
         :content-transfer-encoding:message-id:references:to;
        bh=wLIeYKT2w3lkgXlTD6cSE6fVa2jXLwldf0MItYC7uO0=;
        b=t1wPRZXFNq2DQbYQz0ro9bhn0ZMFHhmp3RXw35X6GGtvaTVGa7dIxNE4W2YNN8IrQb
         JyAWGUweh87mmqycYe8ZJTTOZZAxOehoFF1F6U86dw44fFhHbugTQJtVKWetTa4j2pVa
         B3Hf/D0DGZFlMD5syk1QKD4cf/e3EpPOTwPddlGu1gjitY7bbJOS4nhImYE6A6j3d8PN
         +tH9d6UV+EhGB0DbtIAT/PRdByDhzy7w55Oszi21cc1/FGH3/PEuwXeBSNo3c/dUZHAr
         imp+z95cNQjHn+0CpNpaj5SDRdmCAXQS1jx5SMVoeLWm0uP+X7/dMCX8bYbp3PT5UofY
         whzA==
X-Gm-Message-State: AFeK/H0cXuhOmyKBdyZE8WilbfEHzJ+s9UXSNWVBTGhE2q8cvZ17v2Euvzk+CnPdk3Kc9A==
X-Received: by 10.99.151.10 with SMTP id n10mr28350118pge.199.1490672023826;
        Mon, 27 Mar 2017 20:33:43 -0700 (PDT)
Return-Path: <karisawa@gmail.com>
Received: from [192.168.0.249] (115-36-90-13.chubu1.commufa.jp. [115.36.90.13])
        by smtp.gmail.com with ESMTPSA id c1sm3685985pfk.112.2017.03.27.20.33.42
        for <9front@9front.org>
        (version=TLS1 cipher=ECDHE-RSA-AES128-SHA bits=128/128);
        Mon, 27 Mar 2017 20:33:43 -0700 (PDT)
Content-Type: text/plain; charset=utf-8
Mime-Version: 1.0 (Mac OS X Mail 8.2 \(2104\))
Subject: Re: [9front] pipe: bug or feature?
From: arisawa <karisawa@gmail.com>
In-Reply-To: <CAMVULc591M5Bt6p4fG9a8-sE1Sa=G9WJu+saFwQgmauXPTR_9A@mail.gmail.com>
Date: Tue, 28 Mar 2017 12:33:41 +0900
Content-Transfer-Encoding: quoted-printable
Message-Id: <F679B551-FEA6-46D8-916D-3592605D2E0F@gmail.com>
References: <BFB26C2F-FDF7-4118-B2BD-373750346B2E@gmail.com> <CAMVULc591M5Bt6p4fG9a8-sE1Sa=G9WJu+saFwQgmauXPTR_9A@mail.gmail.com>
To: 9front@9front.org
X-Mailer: Apple Mail (2.2104)
List-ID: <9front.9front.org>
List-Help: <http://lists.9front.org>
X-Glyph: ➈
X-Bullshit: progressive anonymous DOM database YAML realtime-oriented component 

OK! you are right!

I was careless.
thanks.

Kenji Arisawa

> 2017/03/28 11:27=E3=80=81Alex Musolino <musolinoa@gmail.com> =
=E3=81=AE=E3=83=A1=E3=83=BC=E3=83=AB=EF=BC=9A
>=20
> is this a bug or a feature of pipe?
>=20
> It is a bug in your code.  When you do buf[n] =3D 0 in the last while
> loop, you are writing past the end of buf.  This causes pfd[0] to
> become 0 and so the next read is actually from stdin.  Making buf
> larger "fixes" the problem because n=3D256 becomes a valid index.
>=20
> --
> Cheers,
> Alex Musolino