Received: from mx1.tetrasec.net (mx1.tetrasec.net [66.245.176.36])
	by nld3-dev1.alpinelinux.org (Postfix) with ESMTPS id C31C6782C38
	for <~alpine/users@lists.alpinelinux.org>; Tue, 23 Feb 2021 10:03:40 +0000 (UTC)
Received: from mx1.tetrasec.net (mail.local [127.0.0.1])
	by mx1.tetrasec.net (Postfix) with ESMTP id 0F4D81A86B1;
	Tue, 23 Feb 2021 10:03:39 +0000 (UTC)
Received: from ncopa-desktop.lan (67.63.200.37.customer.cdi.no [37.200.63.67])
	(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)
	 key-exchange ECDHE (P-256) server-signature RSA-PSS (4096 bits) server-digest SHA256)
	(No client certificate requested)
	(Authenticated sender: alpine@tanael.org)
	by mx1.tetrasec.net (Postfix) with ESMTPSA id 3CE2E1A86B0;
	Tue, 23 Feb 2021 10:03:37 +0000 (UTC)
Date: Tue, 23 Feb 2021 11:03:30 +0100
From: Natanael Copa <ncopa@alpinelinux.org>
To: Banibrata Dutta <banibrata.dutta@gmail.com>
Cc: ~alpine/users@lists.alpinelinux.org
Subject: Re: Windows/Dos ^M (CR/LF) removal on Alpine ash shell
Message-ID: <20210223110330.3aa0b3dd@ncopa-desktop.lan>
In-Reply-To: <CALODqprPHi4Q284cAURfiB5KzzM-T4jZRPw83Vb_+E2KroL6zg@mail.gmail.com>
References: <CALODqprPHi4Q284cAURfiB5KzzM-T4jZRPw83Vb_+E2KroL6zg@mail.gmail.com>
X-Mailer: Claws Mail 3.17.8 (GTK+ 2.24.33; x86_64-alpine-linux-musl)
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit

On Tue, 23 Feb 2021 10:29:50 +0530
Banibrata Dutta <banibrata.dutta@gmail.com> wrote:

> Hi,
> 
> What would be the recommended way to remove the Control-M (CR/LF
> combination from DOS/Windows produced text file) in ash shell on Alpine ?
> In bash, I could use sed and the Control-V+Control-M character to inject ^M
> in the regex pattern to find/replace. That combination doesn't seem to work
> on Alpine ash.
> 
> thanks
> BD

you can do:

  tr -d '\015' < dos.txt > unix.txt

or:

  sed $'s/\r$//' < dos.txt > unix.txt

or use the mentioned dos2unix tool


-nc