kexec-tools/SOURCES/dracut-fadump-init-fadump.sh
2021-12-09 13:00:36 +00:00

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#!/bin/sh
export PATH=/usr/bin:/usr/sbin
export SYSTEMD_IN_INITRD=lenient
[ -e /proc/mounts ] ||
(mkdir -p /proc && mount -t proc -o nosuid,noexec,nodev proc /proc)
grep -q '^sysfs /sys sysfs' /proc/mounts ||
(mkdir -p /sys && mount -t sysfs -o nosuid,noexec,nodev sysfs /sys)
grep -q '^none / ' /proc/mounts || grep -q '^rootfs / ' /proc/mounts && ROOTFS_IS_RAMFS=1
if [ -f /proc/device-tree/rtas/ibm,kernel-dump ] || [ -f /proc/device-tree/ibm,opal/dump/mpipl-boot ]; then
mkdir /newroot
mount -t ramfs ramfs /newroot
if [ $ROOTFS_IS_RAMFS ]; then
for FILE in $(ls -A /fadumproot/); do
mv /fadumproot/$FILE /newroot/
done
exec switch_root /newroot /init
else
mkdir /newroot/sys /newroot/proc /newroot/dev /newroot/run /newroot/oldroot
grep -q '^devtmpfs /dev devtmpfs' /proc/mounts && mount --move /dev /newroot/dev
grep -q '^tmpfs /run tmpfs' /proc/mounts && mount --move /run /newroot/run
mount --move /sys /newroot/sys
mount --move /proc /newroot/proc
cp --reflink=auto --sparse=auto --preserve=mode,timestamps,links -dfr /fadumproot/. /newroot/
cd /newroot && pivot_root . oldroot
loop=1
while [ $loop ]; do
unset loop
while read -r _ mp _; do
case $mp in
/oldroot/*) umount -d "$mp" && loop=1 ;;
esac
done </proc/mounts
done
umount -d -l oldroot
exec /init
fi
else
exec /init.dracut
fi