From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on inbox.vuxu.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=5.0 tests=DKIM_ADSP_CUSTOM_MED, DKIM_INVALID,DKIM_SIGNED,FREEMAIL_FROM,HTML_MESSAGE, HTML_OBFUSCATE_05_10,MAILING_LIST_MULTI,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.4 Received: (qmail 25475 invoked from network); 7 Apr 2022 17:48:44 -0000 Received: from minnie.tuhs.org (45.79.103.53) by inbox.vuxu.org with ESMTPUTF8; 7 Apr 2022 17:48:44 -0000 Received: by minnie.tuhs.org (Postfix, from userid 112) id 1CFEF9D6F3; Fri, 8 Apr 2022 03:48:41 +1000 (AEST) Received: from minnie.tuhs.org (localhost [127.0.0.1]) by minnie.tuhs.org (Postfix) with ESMTP id 0256C9D6B9; Fri, 8 Apr 2022 03:45:26 +1000 (AEST) Authentication-Results: minnie.tuhs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b="Vlv/QKos"; dkim-atps=neutral Received: by minnie.tuhs.org (Postfix, from userid 112) id 41CC39D6B6; Fri, 8 Apr 2022 03:45:24 +1000 (AEST) Received: from mail-oi1-f180.google.com (mail-oi1-f180.google.com [209.85.167.180]) by minnie.tuhs.org (Postfix) with ESMTPS id B78329D6B1 for ; Fri, 8 Apr 2022 03:45:23 +1000 (AEST) Received: by mail-oi1-f180.google.com with SMTP id j83so6384946oih.6 for ; Thu, 07 Apr 2022 10:45:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=mime-version:from:date:message-id:subject:to; bh=YYy1trVGe/xej2F889yJJw87q6XGc56QLW8TJakBhwQ=; b=Vlv/QKosIo50wgUgiKg9U8YWTlt99pqYZ+nq63Jo04m2R8ObklyG6lYC9qUNAHdiQY Oj8i+6Uw1muvJVj9bJgNon28i/2OqNU7uyuUVxZM6Dq0YaC/qP8geZiTdiTxwRStXulT XCzxhGCKyPJ5EfAwPAHcyarWtLdKlVzPMV9HfPORd/mMlY74DSoBvOkQYZDHeLMcNy26 a71zZ5L4H0okVAta5e3X9iOpLwqzHy/rFUr1VXjlgCx4AZK4WW7Z39pBAa4Jn5c3w+ey PAc6L9SwpyY0P94myNIASrZAWVp0LhB820KvV/+ZZzCI2sR4WI8UiX8Zu9NNx/uwOTeB z+lg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:from:date:message-id:subject:to; bh=YYy1trVGe/xej2F889yJJw87q6XGc56QLW8TJakBhwQ=; b=pt5YPZGJ7fhAOk9IV0m2HX3uaTvIlZCPzKclYiCJo39WEzp7iIWoM3Fi8DwgAQZMM5 a6poxoeGzI00euhid58DWLw5kzzrw7ilUaMTY6BpvUJCu9Hb2EXzRGwPpAlfLZ/nd2ci qHGN1R807oCWoO6IHThaCSHKwYbKedlHGd72FkCFDNViECxaOh/h9ECLfkeyrf11+IW8 6otHNs5eek0j+EqFN2d4oPZZAhTD6arDMOkuGIH7xPh1um9AMimtSdpluvF0ck9UN4UM RKXrIaKyaQrVakQjDCynk4wSX7wacvutxy+kYtpc8N8frg1MU4dh4QWrsXCF3OHT4Y2h cvmQ== X-Gm-Message-State: AOAM5329KglNtNjhOO8ZvzAJWMdqouTNg2PUyhzlDOpOd6YhLBSnpB/A CGoWl23k0UHaxW/SThbNnadKjEBGjVyn4/8wbPxAwRag7kE= X-Google-Smtp-Source: ABdhPJz2vhEFK8SQx+sZbPV5PwU8PqXe9jh9zqL/wy5KoPWh3J0OdVKT/546nzR5mPdPc9o+wUQSscePpe6ugDyL3I0= X-Received: by 2002:a05:6808:210f:b0:2da:4e41:f4ce with SMTP id r15-20020a056808210f00b002da4e41f4cemr6269858oiw.43.1649353522634; Thu, 07 Apr 2022 10:45:22 -0700 (PDT) MIME-Version: 1.0 From: Richard Salz Date: Thu, 7 Apr 2022 13:45:11 -0400 Message-ID: To: TUHS main list Content-Type: multipart/alternative; boundary="000000000000d3661c05dc140a4d" Subject: [TUHS] Why does shell write to stderr? X-BeenThere: tuhs@minnie.tuhs.org X-Mailman-Version: 2.1.26 Precedence: list List-Id: The Unix Heritage Society mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: tuhs-bounces@minnie.tuhs.org Sender: "TUHS" --000000000000d3661c05dc140a4d Content-Type: text/plain; charset="UTF-8" Looking at https://unix.stackexchange.com/questions/380012/why-does-bash-interactive-shell-by-default-write-its-prompt-and-echoes-its-inter, in particular the first answer which has a link to http://minnie.tuhs.org/cgi-bin/utree.pl?file=V7/usr/src/cmd/sh/main%E2%80%8C%E2%80%8B.c Made me wonder: why? --000000000000d3661c05dc140a4d Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable