Messages in this thread |  | | Date | 27 Oct 2001 14:45:00 +0200 | From | (Kai Henningsen) | Subject | Re: [Q] pivot_root and initrd |
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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.
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