/usr/share/tcos/scripts/tcos-premount/30rootfs is in initramfs-tools-tcos 0.89.86.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
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#
if [ "$1" = "prereqs" ]; then
exit 0
fi
quiet=n
. /scripts/functions
# if break=sqmount STOP here
maybe_break rootfs
. /conf/tcos.conf
. /conf/tcos-run-functions
##############################################
TCOS_ENABLE_USENFS=$(read_cmdline_var "usenfs" "${TCOS_USENFS}")
if [ "$TCOS_ENABLE_USENFS" != "1" ]; then
_log "ROOTFS no NFS support, exiting"
exit 0
fi
rootfs_file=/mnt/tmp/rootfs-$(uname -r).squashfs
mkdir -p /mnt/tmp /target
if [ "${TCOS_USENFS}" = "nfs" ]; then
value=0
log_begin_msg "Mounting NFS /mnt/tmp"
MOPTS="nolock,ro"
mount -n -t ramfs none /target
nfsmount -o ${MOPTS} $(read_server "nfs-server"):${nfs_dir} /mnt/tmp 2>&1 > /dev/null ||\
nfsmount -o ${MOPTS} $(read_server "nfs-server"):${nfs_dir} /mnt/tmp 2>&1 > /dev/null ||\
value=1
log_end_msg $value
fi
##############################################
TCOS_ENABLE_ROOTFS=$(read_cmdline_var "rootfs" "${TCOS_ROOTFS}")
if [ "$TCOS_ENABLE_ROOTFS" != "1" ]; then
_log "ROOTFS no rootfs support, exiting"
exit 0
fi
if [ ! -f ${rootfs_file} ]; then
_log "ROOTFS is __NOT__ in /mnt/tmp"
log_begin_msg "Downloading rootfs"
download_file /tcos/rootfs-$(uname -r).squashfs ${rootfs_file}
log_end_msg $?
else
_log "ROOTFS is in /mnt/tmp"
log_begin_msg "Using NFS rootfs"
sync
log_end_msg $?
fi
# Mount squashfs filesystems
_log "ROOTFS mounting rootfs in /target"
log_begin_msg "Mounting rootfs filesystem"
mount -r -o loop -t squashfs ${rootfs_file} /target >> /tmp/initramfs.debug 2>&1
log_end_msg $?
_log "ROOTFS remounting /target as RW"
log_begin_msg "Remounting /target in rw mode"
mkdir -p /.target
mount_unionfs /mnt/rootram /.target /target
log_end_msg $?
_log "ROOTFS copy some things on /target"
# copy some things
rm -rf /target/conf/ && cp -ra /conf/ /target/
rm -rf /target/scripts/ && cp -ra /scripts/ /target/
mkdir -p /target/tmp && cp -ra /tmp/* /target/tmp
#mkdir -p /var/lib/dhcp/
#cp /var/lib/dhcp/dhclient.leases /target/var/lib/dhcp/dhclient.leases
cat /tmp/net.data > /root/tmp/net.data
cp /etc/hostname /target/etc/hostname
cp /etc/resolv.conf /target/etc/resolv.conf
cp /etc/fstab /target/etc/fstab
cp /etc/mtab /target/etc/mtab
_log "ROOTFS creating init_rootfs script"
# make a /sbin/init_rootfs
cat << EOF >> /target/init2
#!/bin/sh
echo "Loading second stage, please wait..."
. /conf/initramfs.conf
. /scripts/functions
run_scripts /scripts/tcos-bottom
EOF
chmod 755 /target/init2
_log "ROOTFS pivot_root /target"
cd /target
pivot_root . ../
_log "ROOTFS mounting /dev /proc and /sys into /target"
# mount -o bind some things
log_begin_msg "Moving /dev /proc and /sys"
mkdir -p /target/dev /target/proc /target/sys /target/mnt/tmp
mount -n -o move /dev /target/dev
mount -n -o move /sys /target/sys
mount -n -o move /mnt/tmp /target/mnt/tmp
mount -n -o move /proc /target/proc
log_end_msg $?
# enter to jail
exec chroot . /scripts/init2 <dev/console >dev/console 2>&1
_log "ROOTFS run-init /script"
#exec run-init /target/ /scripts/init2 "$@" </target/dev/console >/target/dev/console
exit 0
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