Date: Sat, 31 Aug 1996 21:25:34 -0400 From: "Gary Palmer" <gpalmer@FreeBSD.org> To: "Frode Nordahl" <froden@bigblue.no> Cc: "questions@FreeBSD.org" <questions@FreeBSD.org> Subject: Re: Strange TCSH operation... Message-ID: <22676.841541134@orion.webspan.net> In-Reply-To: Your message of "Sat, 31 Aug 1996 13:17:54 BST." <199608311115.NAA03381@login.bigblue.no>
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"Frode Nordahl" wrote in message ID <199608311115.NAA03381@login.bigblue.no>: > ftp:~>; ps -aux |grep froden > froden 6428 0.0 0.1 628 12 p1 RV 1Jan70 0:00.00 -tcsh (tcsh) > froden 6409 0.0 6.8 628 972 p1 Ds 1:02PM 0:00.28 -tcsh (tcsh) > froden 6427 0.0 1.9 452 272 p1 R+ 1:03PM 0:00.01 ps -aux > ftp:~>; Look at the PID's. The tcsh with the funny start time is actually the tcsh which is about to be turned into the 2nd half of your pipe (the grep). I am not 100% sure WHY, but something in the fork/exec process can cause that to happen ... for a VERY brief period, the parent exists with a funny start time. There must be a race condition or something. It's not all that important (since it only affects ps output), so I don't think anyone has spent time looking into why. The `problem' has been around for a while tho (probably all 2.x releases have had this). Gary -- Gary Palmer FreeBSD Core Team Member FreeBSD: Turning PC's into workstations. See http://www.FreeBSD.ORG/ for info
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