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# Copyright (C) 2006 OpenWrt.org
# Copyright (C) 2010 Vertical Communications
missing_lines() {
local file1 file2 line
file1="$1"
file2="$2"
oIFS="$IFS"
IFS=":"
while read line; do
set -- $line
grep -q "^$1:" "$file2" || echo "$*"
done < "$file1"
IFS="$oIFS"
}
# Rootfs mount options can be passed by declaring in the kernel
# cmdline as much options as needed prefixed with "rootfs_mount_options."
#
# Example:
# rootfs_mount_options.compress_algorithm=zstd rootfs_mount_options.noinline_data
#
compose_rootfs_mount_options() {
local mount_options
local cmdlinevar
for cmdlinevar in $(cat /proc/cmdline); do
if [ "$cmdlinevar" != "${cmdlinevar#rootfs_mount_options\.}" ]; then
append mount_options "${cmdlinevar#rootfs_mount_options\.}"
fi
done
echo $mount_options
}
do_mount_root() {
mount_root start "$(compose_rootfs_mount_options)"
boot_run_hook preinit_mount_root
[ -f /sysupgrade.tgz -o -f /tmp/sysupgrade.tar ] && {
echo "- config restore -"
cp /etc/passwd /etc/group /etc/shadow /tmp
cd /
[ -f /sysupgrade.tgz ] && tar xzf /sysupgrade.tgz
[ -f /tmp/sysupgrade.tar ] && tar xf /tmp/sysupgrade.tar
missing_lines /tmp/passwd /etc/passwd >> /etc/passwd
missing_lines /tmp/group /etc/group >> /etc/group
missing_lines /tmp/shadow /etc/shadow >> /etc/shadow
rm /tmp/passwd /tmp/group /tmp/shadow
# Prevent configuration corruption on a power loss
sync
}
}
[ "$INITRAMFS" = "1" ] || boot_hook_add preinit_main do_mount_root
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