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From: kaih@khms.westfalen.de (Kai Henningsen)
To: linux-kernel@vger.kernel.org
Subject: Re: [Q] pivot_root and initrd
Date: 27 Oct 2001 14:45:00 +0200	[thread overview]
Message-ID: <8BfMOaZmw-B@khms.westfalen.de> (raw)
In-Reply-To: <3BCDCF1D.6030202@usa.net>
In-Reply-To: <3BCDCF1D.6030202@usa.net>

ebrower@usa.net (Eric)  wrote on 17.10.01 in <3BCDCF1D.6030202@usa.net>:

> You are simply doing the following, I assume with success:

>    exec /sbin/init "$@"

> whereas I am doing something like the following:

>    exec chroot . sh -c 'umount $OLDROOT; exec -a init.new /sbin/init
>      $INITARGS' <dev/console >dev/console 2>&1

> I am mystified that the call to 'exec /sbin/init' works if you are using
> the standard (you mention "based on RedHat7.1" util-linux") /sbin/init
> proggie, and that a standard RH7.1 initscripts would not complain when
> the root filesystem is already mounted r/w.

It works because the PID is 1, of course.

/linuxrc (or however you call it) runs with PID=1, so when it exec's /sbin/ 
init, the PID is still 1.

OTOH, you have chroot run a shell as a child, which therefore does *not*  
have PID=1.

MfG Kai

  parent reply	other threads:[~2001-10-29 19:34 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <p05100300b7f2b3b94b17@[10.128.7.49]>
2001-10-17 18:34 ` [Q] pivot_root and initrd Eric
2001-10-17 21:17   ` H. Peter Anvin
2001-10-27 12:45   ` Kai Henningsen [this message]
2001-11-05 21:52     ` Andreas Schwab
     [not found] <p05100304b80cbe9cf127@[10.128.7.49]>
2001-11-06  0:05 ` Eric
     [not found] <p05100328b7fb8dcb9473@[207.213.214.37]>
2001-10-23 21:54 ` Eric
2001-10-24  0:20   ` Werner Almesberger
2001-10-23 17:42 Eric
2001-10-23 18:14 ` H. Peter Anvin
2001-10-23 19:54   ` bill davidsen
2001-10-23 19:59     ` Rik van Riel
2001-10-23 20:21       ` bill davidsen
2001-10-23 21:00         ` H. Peter Anvin
2001-10-23 20:37   ` Werner Almesberger
2001-10-23 20:46     ` Richard B. Johnson
2001-10-23 20:52       ` H. Peter Anvin
2001-10-23 21:05         ` Richard B. Johnson
2001-10-23 21:06           ` H. Peter Anvin
  -- strict thread matches above, loose matches on Subject: below --
2001-10-17  2:16 Eric
2001-10-17  3:30 ` H. Peter Anvin

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