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https://github.com/openwrt/openwrt.git
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96 lines
2.0 KiB
Bash
96 lines
2.0 KiB
Bash
#!/bin/sh
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# Copyright (C) 2006-2010 OpenWrt.org
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# Copyright (C) 2010 Vertical Communications
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boot_hook_add() {
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local hook="${1}_hook"
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local value="$2"
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local sep=" "
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eval "$hook=\"\${$hook:+\${$hook}\${value:+\$sep}}\$value\""
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}
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boot_run_hook() {
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local boot_func
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for boot_func in $(eval "echo \"\$${1}_hook\""); do
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$boot_func "$1" "$2"
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done
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}
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find_mtd_part() {
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local PART="$(grep "\"$1\"" /proc/mtd | awk -F: '{print $1}')"
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local PREFIX=/dev/mtdblock
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PART="${PART##mtd}"
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[ -d /dev/mtdblock ] && PREFIX=/dev/mtdblock/
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echo "${PART:+$PREFIX$PART}"
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}
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jffs2_ready () {
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mtdpart="$(find_mtd_part rootfs_data)"
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magic=$(hexdump $mtdpart -n 4 -e '4/1 "%02x"')
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[ "$magic" != "deadc0de" ]
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}
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dupe() { # <new_root> <old_root>
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cd $1
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echo -n "creating directories... "
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{
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cd $2
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find . -xdev -type d
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echo "./dev ./jffs ./mnt ./proc ./tmp"
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# xdev skips mounted directories
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cd $1
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} | xargs mkdir -p
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echo "done"
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echo -n "setting up symlinks... "
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for file in $(cd $2; find . -xdev -type f;); do
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case "$file" in
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./rom/note) ;; #nothing
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./etc/config*|\
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./usr/lib/opkg/info/*) cp -af $2/$file $file;;
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*) ln -sf /rom/${file#./*} $file;;
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esac
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done
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for file in $(cd $2; find . -xdev -type l;); do
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cp -af $2/${file#./*} $file
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done
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echo "done"
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}
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pivot() { # <new_root> <old_root>
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mount -o move /proc $1/proc && \
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pivot_root $1 $1$2 && {
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mount -o move $2/dev /dev
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mount -o move $2/tmp /tmp
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mount -o move $2/sys /sys 2>&-
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mount -o move $2/jffs /jffs 2>&-
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return 0
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}
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}
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fopivot() { # <rw_root> <ro_root> <dupe?>
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root=$1
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{
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if grep -q mini_fo /proc/filesystems; then
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mount -t mini_fo -o base=/,sto=$1 "mini_fo:$1" /mnt 2>&- && root=/mnt
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else
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mount --bind / /mnt
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mount --bind -o union "$1" /mnt && root=/mnt
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fi
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} || {
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[ "$3" = "1" ] && {
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mount | grep "on $1 type" 2>&- 1>&- || mount -o bind $1 $1
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dupe $1 $rom
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}
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}
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pivot $root $2
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}
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ramoverlay() {
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mkdir -p /tmp/root
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mount -t tmpfs root /tmp/root
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fopivot /tmp/root /rom 1
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}
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