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SubjectRe: [Q] pivot_root and initrd (Eric)  wrote on 17.10.01 in <>:

> 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 /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
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