From nobody Sat Dec 11 17:48:23 2021 X-Original-To: freebsd-hackers@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id DC2F518E48F5 for ; Sat, 11 Dec 2021 17:48:34 +0000 (UTC) (envelope-from bakul@iitbombay.org) Received: from mail-qv1-xf2c.google.com (mail-qv1-xf2c.google.com [IPv6:2607:f8b0:4864:20::f2c]) (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 1D4" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4JBFcd6WZ8z4gFv for ; Sat, 11 Dec 2021 17:48:33 +0000 (UTC) (envelope-from bakul@iitbombay.org) Received: by mail-qv1-xf2c.google.com with SMTP id u16so10823149qvk.4 for ; Sat, 11 Dec 2021 09:48:33 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=iitbombay-org.20210112.gappssmtp.com; s=20210112; h=content-transfer-encoding:from:mime-version:subject:date:message-id :references:cc:in-reply-to:to; bh=WT/5GpyUlNxbSTn2TEA1iVRteQk5hVnXeVGZShrmKww=; b=HzNYzn0hvW815PcrcfmONjen+jRPu77iGkx1DeiEAu58ZgOEWb/EkX6XeCTZCOzg+n rNTPJIYgLitA6nNu0lI8lf8EFyTev4b0gXNqIARsuHqN1D4pT9snHN2PNBvqMAsjaaRP StLUGwVJfVNpIOqtHCPCeL5AF8u9mnw6LryGxiSxvddVwt6BiCNaa9nTvZRZOY1WlHs4 uEougXZf8BVSJAizisTY40HwxDWj9IH5rRHeTRasgkACEosTfb9gm1hkfnjyGASv7eNo ZBP67avIqTgy49EI9IJz40enJ84+/QKLMJJNoeDMnjSL/q6m2rbD571s3B7JvV536MX2 dDXg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:content-transfer-encoding:from:mime-version :subject:date:message-id:references:cc:in-reply-to:to; bh=WT/5GpyUlNxbSTn2TEA1iVRteQk5hVnXeVGZShrmKww=; b=iNZzqgv5OkDdu47ieafZr76xi1P+98PbC8AZ/4jja7SUuuLOeQwP21SZr5A1MfyQqY 99b6fz9sLkLZ/JOp9U6PTmILY61E+qC4KLmj0O5uJymkkXCfg5fIjIieqi+Beaw4JFIH ac1o22Qf0hcqFnVOmsctommOe5GEnnJ60ebspMuU7pJ4SZECxcB7x0mujsF6ZPXlHBRA DPuXnG4xfNn12+dQgsBaTR7KGEDzBRXOUkFo3S94NKB/PTl1cS0fqTiW0YDUFu+6ZYuL 5F/3qLZ32kBq5aswmcDDcavX/R89wK2YBQng57eJJFvTUbfYUii3TgbNUk7J08yXvnlP rkag== X-Gm-Message-State: AOAM532Aco83k6avr6T94zbhfZTwoNsD4DdJrAye+rQFfCWt+RHLnFmR fd95zDIbz7QeoZ/AHkZ0pMOJQw== X-Google-Smtp-Source: ABdhPJyukTGxrG5ApJyf9V4Efr7S8LRe3MmhCSh4g47+MPqYAoiiksnxPFz4EgFokIvTjZ50Hy4sXw== X-Received: by 2002:a05:6214:2021:: with SMTP id 1mr32234456qvf.75.1639244907393; Sat, 11 Dec 2021 09:48:27 -0800 (PST) Received: from smtpclient.apple (107-215-223-229.lightspeed.sntcca.sbcglobal.net. [107.215.223.229]) by smtp.gmail.com with ESMTPSA id x25sm3232835qkf.91.2021.12.11.09.48.26 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sat, 11 Dec 2021 09:48:26 -0800 (PST) Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable From: Bakul Shah List-Id: Technical discussions relating to FreeBSD List-Archive: https://lists.freebsd.org/archives/freebsd-hackers List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-hackers@freebsd.org Mime-Version: 1.0 (1.0) Subject: Re: What to use in place of abstract unix sockets? Date: Sat, 11 Dec 2021 09:48:23 -0800 Message-Id: <44CC9776-D2C1-4B37-8758-3D94C35AE97A@iitbombay.org> References: Cc: freebsd-hackers In-Reply-To: To: Gleb Popov X-Mailer: iPad Mail (19B74) X-Rspamd-Queue-Id: 4JBFcd6WZ8z4gFv X-Spamd-Bar: + Authentication-Results: mx1.freebsd.org; dkim=pass header.d=iitbombay-org.20210112.gappssmtp.com header.s=20210112 header.b=HzNYzn0h; dmarc=none; spf=pass (mx1.freebsd.org: domain of bakul@iitbombay.org designates 2607:f8b0:4864:20::f2c as permitted sender) smtp.mailfrom=bakul@iitbombay.org X-Spamd-Result: default: False [1.41 / 15.00]; RCVD_VIA_SMTP_AUTH(0.00)[]; ARC_NA(0.00)[]; R_DKIM_ALLOW(-0.20)[iitbombay-org.20210112.gappssmtp.com:s=20210112]; FREEFALL_USER(0.00)[bakul]; FROM_HAS_DN(0.00)[]; MV_CASE(0.50)[]; R_SPF_ALLOW(-0.20)[+ip6:2607:f8b0:4000::/36]; MIME_GOOD(-0.10)[text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-hackers@freebsd.org]; DMARC_NA(0.00)[iitbombay.org]; NEURAL_SPAM_MEDIUM(0.98)[0.981]; RCVD_COUNT_THREE(0.00)[3]; TO_MATCH_ENVRCPT_SOME(0.00)[]; TO_DN_ALL(0.00)[]; DKIM_TRACE(0.00)[iitbombay-org.20210112.gappssmtp.com:+]; RCPT_COUNT_TWO(0.00)[2]; RCVD_IN_DNSWL_NONE(0.00)[2607:f8b0:4864:20::f2c:from]; NEURAL_HAM_SHORT(-0.98)[-0.981]; NEURAL_SPAM_LONG(0.41)[0.413]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; SUBJECT_ENDS_QUESTION(1.00)[]; ASN(0.00)[asn:15169, ipnet:2607:f8b0::/32, country:US]; RCVD_TLS_ALL(0.00)[]; MID_RHS_MATCH_FROM(0.00)[] X-ThisMailContainsUnwantedMimeParts: N On Dec 7, 2021, at 10:44 PM, Gleb Popov wrote: >=20 > =EF=BB=BFHello hackers. >=20 > I'm porting a software that does the following things on Linux: >=20 > 1. Binds an abstract UDS (the socket name starts with '\0') > 2. Launches a "client" process. > 3. "Client" uses chroot() to constrain itself in a sort of jail. > 4. "Client" connects to the abstract UDS. >=20 > =46rom what I can tell, this works because abstract UDS's do not use the > filesystem namespace, which is why "client" can connect out of the > chroot'ed environment. >=20 > What can I do to make this software work for FreeBSD? Simply using regular= > UDS instead of abstract ones doesn't work for obvious reasons - the > "client" can't find the socket file. >=20 > Thanks in advance. Can you not pass one end of unix domain socketpair via sendmsg/recvmsg?=