From owner-freebsd-hackers@freebsd.org Sun May 17 08:11:11 2020 Return-Path: Delivered-To: freebsd-hackers@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 2B8942CA0AD for ; Sun, 17 May 2020 08:11:11 +0000 (UTC) (envelope-from grarpamp@gmail.com) Received: from mail-io1-xd44.google.com (mail-io1-xd44.google.com [IPv6:2607:f8b0:4864:20::d44]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "smtp.gmail.com", Issuer "GTS CA 1O1" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 49Pvwt10z8z45Kd for ; Sun, 17 May 2020 08:11:09 +0000 (UTC) (envelope-from grarpamp@gmail.com) Received: by mail-io1-xd44.google.com with SMTP id t15so415994ios.4 for ; Sun, 17 May 2020 01:11:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:in-reply-to:references:from:date:message-id:subject:to; bh=JancfPXZSIQNa9KsICTMOcppuEDddZIJL7ELPmgoPBI=; b=LpLTlg9/utqgUV9m0XpUHn7hXZ15vEk1o7B+mo8m8BJHetas+W7o6jsr3ucGKXwIff AzrXfqJClH7YMg7ILiC++WloYsJ9YYAeO5YHA7enzflMrJY4E9Mh4YbDdF/Cj46zZCSe OL98TMDUy6kknOXfal8zzAB+o27cUzIfRItoAsZYr88DpUnETf3RNX1NOjio+MbpYJ/i L6J7ujetXd8o2ZE05BmiPnZAvMMtldmQpo3/XvUc/kWfMj+uZrm0aGJAMu4XTpLFae4U GkJeNybNnHvNQ13hVQG5AVsphHqL5Yi2M7Sw/d5UQXsEHC3s61PKFv7ZMu4kQ8X74x7C 509A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to; bh=JancfPXZSIQNa9KsICTMOcppuEDddZIJL7ELPmgoPBI=; b=uCXnD3tU5NC5qTddCGesOec5gmNSu1QXunZtQ1snN1CRzCvPbK8B/niIysbFgveNoU qpqhVSK7zJcvSbRSbOUieBvnDE6F41mUOUHOWhPwvLkI8zLgmFlWX3n35Rz0xSxBWZJ9 v9ZmXWfp75jb4ZhAifJsNby45uZeA/mohCIQe2SaxR0+CSOYpYx4CoQOAXUQUUk1hN06 nyt4aNhG018KIKux2padb10OAzpkjc3S9GY1gwzVw+O5QSgbt9Bp4RLJJ0R9IBkM4JKy fwZC8xD8BNNJddGLiO/MOJpio96cr3bNt6wBJxePEw6IWL8nFM0CNetluAl7Ur5cPnsi XaCQ== X-Gm-Message-State: AOAM531+5fm8F1E7DVposjGfq/DJY30FwesnOREzSXIvIj1d5l1Ic7hU v2XrrxGQMbg1DO/o4sX+R5QowrQMimT4Brf7HlXJ+JgP X-Google-Smtp-Source: ABdhPJw2aYZz35vl4Ti+TP+6pcVK+XQnj0fY+nsBT1IqOOOnFQJCRj1b83XZYgWR63VpYgU7UwNO/og9YkRO80yjBm4= X-Received: by 2002:a02:b149:: with SMTP id s9mr9064016jah.81.1589703068900; Sun, 17 May 2020 01:11:08 -0700 (PDT) MIME-Version: 1.0 Received: by 2002:a02:c788:0:0:0:0:0 with HTTP; Sun, 17 May 2020 01:11:08 -0700 (PDT) In-Reply-To: <202005161518.04GFIA0a099390@fire.js.berklix.net> References: <2ea8236f935a4c786a0f4f06ca1d3ea3@udns.ultimatedns.net> <202005161518.04GFIA0a099390@fire.js.berklix.net> From: grarpamp Date: Sun, 17 May 2020 04:11:08 -0400 Message-ID: Subject: Re: [HEADSUP] Disallowing read() of a directory fd To: freebsd-hackers@freebsd.org Content-Type: text/plain; charset="UTF-8" X-Rspamd-Queue-Id: 49Pvwt10z8z45Kd X-Spamd-Bar: / Authentication-Results: mx1.freebsd.org; dkim=pass header.d=gmail.com header.s=20161025 header.b=LpLTlg9/; dmarc=pass (policy=none) header.from=gmail.com; spf=pass (mx1.freebsd.org: domain of grarpamp@gmail.com designates 2607:f8b0:4864:20::d44 as permitted sender) smtp.mailfrom=grarpamp@gmail.com X-Spamd-Result: default: False [-0.70 / 15.00]; ARC_NA(0.00)[]; R_DKIM_ALLOW(-0.20)[gmail.com:s=20161025]; FROM_HAS_DN(0.00)[]; FREEMAIL_FROM(0.00)[gmail.com]; TO_MATCH_ENVRCPT_ALL(0.00)[]; MIME_GOOD(-0.10)[text/plain]; TO_DN_NONE(0.00)[]; PREVIOUSLY_DELIVERED(0.00)[freebsd-hackers@freebsd.org]; RCPT_COUNT_ONE(0.00)[1]; R_SPF_ALLOW(-0.20)[+ip6:2607:f8b0:4000::/36]; DKIM_TRACE(0.00)[gmail.com:+]; DMARC_POLICY_ALLOW(-0.50)[gmail.com,none]; RCVD_IN_DNSWL_NONE(0.00)[2607:f8b0:4864:20::d44:from]; NEURAL_SPAM_SHORT(0.30)[0.297]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; FREEMAIL_ENVFROM(0.00)[gmail.com]; ASN(0.00)[asn:15169, ipnet:2607:f8b0::/32, country:US]; RCVD_COUNT_TWO(0.00)[2]; RCVD_TLS_ALL(0.00)[]; DWL_DNSWL_NONE(0.00)[gmail.com:dkim] X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 17 May 2020 08:11:11 -0000 > Another use of "cat ." is to see names of transient files a tool > creates, & normaly deletes People in fora have been seen doing this, often after discovering read works after figuring what command arguments blew up their screen. > so one can find same > name junk elsewhere, & search for tool causing junk, Many might not like managing ktrace -ditnp 1 then again unfortunately there may still not be anyone offering useful kernel module ports that might log all pathname add/use/del, save its contents somewhere, log all keystrokes in shells, etc. > & ensure other data files avoid using names that would be zapped. mkstemp(3)