From nobody Mon Jul 07 11:43:04 2025 X-Original-To: current@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 4bbMn85FFkz61Wjw for ; Mon, 07 Jul 2025 11:43:08 +0000 (UTC) (envelope-from david@catwhisker.org) Received: from mx.catwhisker.org (mx.catwhisker.org [107.204.234.170]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 4bbMn63PkNz3MTD for ; Mon, 07 Jul 2025 11:43:06 +0000 (UTC) (envelope-from david@catwhisker.org) Authentication-Results: mx1.freebsd.org; dkim=none; spf=pass (mx1.freebsd.org: domain of david@catwhisker.org designates 107.204.234.170 as permitted sender) smtp.mailfrom=david@catwhisker.org; dmarc=none Received: from albert.catwhisker.org (localhost [127.0.0.1]) by albert.catwhisker.org (8.18.1/8.18.1) with ESMTP id 567Bh4fU020836 for ; Mon, 7 Jul 2025 11:43:04 GMT (envelope-from david@albert.catwhisker.org) Received: (from david@localhost) by albert.catwhisker.org (8.18.1/8.18.1/Submit) id 567Bh45B020835 for current@freebsd.org; Mon, 7 Jul 2025 04:43:04 -0700 (PDT) (envelope-from david) Date: Mon, 7 Jul 2025 04:43:04 -0700 From: David Wolfskill To: current@freebsd.org Subject: Something seems a bit odd with pipes after main-n278435-945ba658d803 Message-ID: Mail-Followup-To: David Wolfskill , current@freebsd.org List-Id: Discussions about the use of FreeBSD-current List-Archive: https://lists.freebsd.org/archives/freebsd-current List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-current@FreeBSD.org MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="n9H+jLSfN2S6Ydqw" Content-Disposition: inline X-Spamd-Result: default: False [-2.07 / 15.00]; SIGNED_PGP(-2.00)[]; NEURAL_SPAM_MEDIUM(0.91)[0.907]; NEURAL_HAM_SHORT(-0.72)[-0.723]; MIME_GOOD(-0.20)[multipart/signed,text/plain]; R_SPF_ALLOW(-0.20)[+ip4:107.204.234.170]; NEURAL_SPAM_LONG(0.14)[0.145]; RCPT_COUNT_ONE(0.00)[1]; ASN(0.00)[asn:7018, ipnet:107.192.0.0/12, country:US]; FREEFALL_USER(0.00)[david]; DMARC_NA(0.00)[catwhisker.org]; MISSING_XM_UA(0.00)[]; MIME_TRACE(0.00)[0:+,1:+,2:~]; R_DKIM_NA(0.00)[]; MLMMJ_DEST(0.00)[current@freebsd.org]; MID_RHS_MATCH_FROMTLD(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; FROM_EQ_ENVFROM(0.00)[]; ARC_NA(0.00)[]; TO_DN_NONE(0.00)[]; PREVIOUSLY_DELIVERED(0.00)[current@freebsd.org]; TO_MATCH_ENVRCPT_ALL(0.00)[]; RCVD_TLS_LAST(0.00)[]; FROM_HAS_DN(0.00)[] X-Rspamd-Queue-Id: 4bbMn63PkNz3MTD X-Spamd-Bar: -- --n9H+jLSfN2S6Ydqw Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable As "problems" go, this is quite mild -- but it seems rather unexpected, and thus may be an idicator of something not quite going as intended. I am "tracking" head daily; up to main-n278435-945ba658d803 (built Friday, 04 July), pipe behavior seemed ... normal. Yesterday (Sunday, 06 July), running main-n278483-476d2d8f290f, I noticed that running a "tail -F | grep ..." on the build typescript no longer showed "interesting" excerpts of the build... until the build was done (and script had closed the typescript file). Or ... if (from a different terminal/window/...) I run the same "grep" command directly against the typescript file (vs. the "tail -F" pipeline), the earlier one (using "tail -F") "wakes up" & displays the extracted lines up to that point. If there is more to be displayed, it won't be -- unless I re-run a command that reads the file or script closes it. (Running "grep" is not necessary -- I just tried merely running "cat" against it; that also worked to "wake up" the "tail -F" pipeline.) This morning, running main-n278488-afd5bc630930, that behavior (from yesterday) persists. (I wanted to see if the issue persisted before whining about it.) The same hardware running stable/14 behaves as have systems I have run since a couple of decades ago (in that respect). The systems on which I have observed this are each amd64, using files on UFS. Additional information (build logs; dmesg; &c.) is available at https://www.catwhisker.org/~david/FreeBSD/history/ Peace, david --=20 David H. Wolfskill david@catwhisker.org "The whole idea of reciprocal tariffs is if someone's punching me in the face, I'm going to punch myself in the face." -- Warwick McKibbin See https://www.catwhisker.org/~david/publickey.gpg for my public key. --n9H+jLSfN2S6Ydqw Content-Type: application/pgp-signature; name=signature.asc -----BEGIN PGP SIGNATURE----- iNUEARYKAH0WIQSTLzOSbomIK53fjFliipiWhXYx5QUCaGuyyF8UgAAAAAAuAChp c3N1ZXItZnByQG5vdGF0aW9ucy5vcGVucGdwLmZpZnRoaG9yc2VtYW4ubmV0OTMy RjMzOTI2RTg5ODgyQjlEREY4QzU5NjI4QTk4OTY4NTc2MzFFNQAKCRBiipiWhXYx 5SP1AQC9tShJ1OYY4kh1BXjsx5QBJS5LeSAeoimF4L2MzVe2UwEA2eUPgXLpcFdV 8hVqd5kk9H4kX94FrosHiel7zlZi9ww= =icuA -----END PGP SIGNATURE----- --n9H+jLSfN2S6Ydqw--