From nobody Wed Feb 12 04:10:25 2025 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 4Yt4cG15RRz5nKJ2 for ; Wed, 12 Feb 2025 04:10:54 +0000 (UTC) (envelope-from 6yearold@gmail.com) Received: from mail-yb1-f182.google.com (mail-yb1-f182.google.com [209.85.219.182]) (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 "WR4" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4Yt4cF6L7pz3tk4 for ; Wed, 12 Feb 2025 04:10:53 +0000 (UTC) (envelope-from 6yearold@gmail.com) Authentication-Results: mx1.freebsd.org; none Received: by mail-yb1-f182.google.com with SMTP id 3f1490d57ef6-e4930eca0d4so4570275276.3 for ; Tue, 11 Feb 2025 20:10:53 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1739333453; x=1739938253; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=TWsoiG4looY3n/SVa128zGj5NxUlB5Tl28nSHTjAPw8=; b=k9rkj8u/z8X3Ktwlx1AjsVNvvVWX7Wt0cDCXTj+J9UxCVsOJMYEXTg8m4SjkiC8IVQ TF3HRbSsVIL2+XZbWCWSmgKtCqBccI38t7LWYZ47eTozdyqj2Qmwoa3/4qLs9BsFGO0D 5pMEYZHoGTCtTsofMWBrCw6ff19y6h7gpH0grf5l3arHXIXCilj13ul6HnPqLLIogUnS +iGhr6hybmi4mblFBCkBatxsv5mdsH/vn6xPg3S3EvvSMbWTnuwdT8DCdrTrAd/65ugd bGRPzsPqHeeIWTTvDwGHGuyh3rEUek+tikIaQ3+I6T74FEunVEqgSpLrCQ/IAMzYOWo+ XjcA== X-Gm-Message-State: AOJu0Yzurjx116LCGPhKTg1ULTYEU8a25P+Y/HI4iT6VIe1UWWW3LZCs J9jX17P0Vn60JZdWYVnN0nQ5zhe6ea7oEENhGwCcOYhyJkoaG8PHj6yZgbUd X-Gm-Gg: ASbGncvNEcT++zLbCH+ecjD9u80Ense0j2v2h8PKqNsRZmIWNjZ3f13U/brGKp77tAy Ie3C/IJWQQGiMH1tbIDQJSywLc0Zc22DG055MKsBH/QmDny+b8qDs0qQlXHD3sX2E4PBe43tqO/ bS6cKWh/oe4xQAgge6BwoOgaqnHPFBTDGAqZQVEhlfizcSat1Qa9WhROYXzDZmEwMr25vFc7ygB 53T0lcB/oPLKOXgW/kVi+uEl+jQ3lwujlbDiPNYf4ms1OPPVF4e97KGYexpLmWJWUT5a1n5X0cD e3u0HWhpXP3nVhGQ/Ny7LuXYpRAr+BPvYOWgyCUan451NKYHBibe51w= X-Google-Smtp-Source: AGHT+IGi5VFy2kBNpk9abROvchwLHvIU1r5u4WL4A5eT/5rH0No5fuL73jk5UkP+dQdP2mGCxNFFDQ== X-Received: by 2002:a05:6902:1502:b0:e57:cb4c:8a4b with SMTP id 3f1490d57ef6-e5d9f172228mr2032894276.39.1739333452892; Tue, 11 Feb 2025 20:10:52 -0800 (PST) Received: from mail-yw1-f176.google.com (mail-yw1-f176.google.com. [209.85.128.176]) by smtp.gmail.com with ESMTPSA id 3f1490d57ef6-e5b3a489b33sm3650878276.52.2025.02.11.20.10.52 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 11 Feb 2025 20:10:52 -0800 (PST) Received: by mail-yw1-f176.google.com with SMTP id 00721157ae682-6f9c6d147edso35278487b3.3 for ; Tue, 11 Feb 2025 20:10:52 -0800 (PST) X-Received: by 2002:a05:690c:4903:b0:6ef:7312:d05c with SMTP id 00721157ae682-6fb1f16a77amr23585797b3.2.1739333452141; Tue, 11 Feb 2025 20:10:52 -0800 (PST) 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 References: In-Reply-To: From: Gleb Popov Date: Wed, 12 Feb 2025 07:10:25 +0300 X-Gmail-Original-Message-ID: X-Gm-Features: AWEUYZkkFoYPBGhyD9Bfl65Vs5VY20bOlXSq0wdnD7k2PIB9RGZPQUHC1I-_Fvc Message-ID: Subject: Re: Would we want pidfd_open(2) & SO_PEERPIDFD? To: Konstantin Belousov Cc: freebsd-hackers Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Rspamd-Queue-Id: 4Yt4cF6L7pz3tk4 X-Spamd-Bar: ---- X-Rspamd-Pre-Result: action=no action; module=replies; Message is reply to one we originated X-Spamd-Result: default: False [-4.00 / 15.00]; REPLY(-4.00)[]; ASN(0.00)[asn:15169, ipnet:209.85.128.0/17, country:US] On Tue, Feb 11, 2025 at 9:57=E2=80=AFPM Konstantin Belousov wrote: > > > The semantic of the Linux' fd returned by pidfd_open() is not compatible > with our pidfd. What's the difference, exactly? I mean, it is still a descriptor and the only thing I need to do with it is check if it is still open. We even have pdgetpid() to go from the fd to a PID. This all looks like a perfect match to me.