mount-error.sh
pho (Peter Holm)
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	pho
	May 16 2022, 1:05 PM

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mount-error.sh
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	#!/bin/sh

	[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1

	mntpoint=/mnt
	mdstart=10
	newfs_flags='-U'

	set -e
	u1=$mdstart
	u2=$((mdstart + 1))
	mp1=${mntpoint}$u1
	mp2=${mntpoint}$u2
	mkdir -p $mp1 $mp2
	diskimage=$mp1/fsck8.sh.diskimage

	max=$((10 * 1024 * 1024))
	[ "$newfs_flags" = "-j" ] &&
	max=$((20 * 1024 * 1024))

	mount \| grep "on $mp1 " \| grep -q /dev/md && umount -f $mp1
	[ -c /dev/md$u1 ] && mdconfig -d -u $u1
	mdconfig -a -t swap -s 1g -u $u1
	newfs $newfs_flags -n /dev/md$u1 > /dev/null
	mount /dev/md$u1 $mp1

	[ -c /dev/md$u2 ] && mdconfig -d -u $u2
	dd if=/dev/zero of=$diskimage bs=$max count=1 status=none
	mdconfig -a -t vnode -f $diskimage -u $u2
	backups=`newfs -N $newfs_flags md$u2 \| grep -A1 "super-block backups" \| \
	tail -1 \| sed 's/,//g'`
	newfs $newfs_flags md$u2
	dumpfs /dev/md$u2 \| head -24
	mount /dev/md$u2 $mp2 \|\| exit 1
	[ -d /usr/include/sys ] && cp -r /usr/include/sys $mp2
	umount $mp2
	mdconfig -d -u $u2
	umount $mp1
	mdconfig -d -u $u1
	rm -f /tmp/flip
	exit $s