* Re: [gentoo-user] How to repair a 'secondary Gentoo system'
@ 2017-12-11 19:12 99% ` Helmut Jarausch
0 siblings, 0 replies; 1+ results
From: Helmut Jarausch @ 2017-12-11 19:12 UTC (permalink / raw
To: gentoo-user
On 12/11/2017 05:58:42 PM, David Haller wrote:
> Hello,
>
> On Mon, 11 Dec 2017, Helmut Jarausch wrote:
> >But now, don't ask me why,
> >chroot /OtherGentoo /bin/bash
> >dies of a segment fault.
> >
> >Is there any means to repair such a Gentoo system short of
> rebuilding it
> >(nearly) from scratch?
>
> How about a bit of debugging first?
>
> # catchsegv chroot /OtherGentoo /bin/bash
> # cd /OtherGentoo/ && chroot /OtherGentoo/ /bin/bash
>
> (ISTR, there was/is a reason for first cd-ing into the chroot and then
> chrooting with the full-path...)
>
> Have you (bind) mounted /sys, /dev, /proc into the chroot?
>
> I use this as the top and bottom of a little bit longer
> chroot-wrapper-script:
>
> ==== /root/bin/chrooter ====
> #!/bin/bash
> root="$1"
> shift
>
> test -e "${root}/proc/kcore" || mount --bind /proc/ "${root}/proc"
> test -e "${root}/sys/block" || mount --bind /sys/ "${root}/sys"
> test -e "${root}/dev/root" || mount --bind /dev/ "${root}/dev"
> test -e "${root}/dev/pts/0" || mount --bind /dev/pts/
> "${root}/dev/pts"
> [..]
> cd "$root"
> chroot "$root" /bin/bash -l
> ====
My procedure is quite similar, I only use
mount --rbind /dev/ "${root}/dev"
and
mount --rbind /run /${NROOT}/run
---
I've tried
catchsegv chroot /OtherGentoo /bin/bash
as well as
chroot /OtherGentoo catchsegv /bin/bash
In both cases, I don't get any error messages BUT I don't get chrooted.
Strangely enough, dmesg shows
systemd-coredump[25375]: Failed to connect to coredump service: No such
file or directory
although I'm not using system but openrc on both system
Thanks,
Helmut
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