source: freewrt/scripts/instprep-rb.sh@ 655dec8

#!/bin/sh
#
#       Prepare the RootFS for later use. Depending on
#       the chosen target device type, do some of the following:
#       * Create initial set of device nodes.
#       * Recursively change owner to root.
#       * Copy kernel to flash.
#

MYTARGET=@@TARGET_FS@@

ME="`basename $0`"
ID=`id -u`

makenode() { # (mode,name,type,major,minor)
        if [ -c $1 ]; then
                echo "skipping existing file \`$1'"
        elif ! mknod -m $1 $2 $3 $4 $5; then
                echo "error creating file \`$1', aborting!"
                exit 1
        fi
}
help_quit() { # ()
        echo "Usage:"
        echo "$ME"
        echo
        echo "Prepare the RootFS right after installation for later use."
        echo "If you want to know better, look at the source."
        exit 1
}

[ $# -gt 0 ] && { echo "Too many arguments!"; help_quit;}
[ "$ID" -ne 0 ] && { echo "You need to be root to run me!"; help_quit;}

# check for myself in current dir
if [ ! -f "${PWD}/$ME" ]; then
        cd `dirname $0`
fi

case $MYTARGET in

ext2-cf|nfs)
echo "creating device nodes"
makenode 0666 dev/null c 1 3
makenode 0666 dev/tty c 5 0
makenode 0622 dev/console c 5 1
makenode 0660 dev/cfa b 13 0
makenode 0660 dev/cfa1 b 13 1
makenode 0660 dev/cfa2 b 13 2
;;

yaffs2)
echo "copying over device nodes"
cp -dpR /dev/null /dev/tty /dev/console /dev/mtd* dev/
echo "copying over kernel"
if [ -b /dev/mtdblock0 ]; then
        mount -t yaffs2 /dev/mtdblock0 mnt/
elif [ -b /dev/mtdblock/0 ]; then
        mount -t yaffs2 /dev/mtdblock/0 mnt/
else
        echo "device node for first flash partition not found!"
        exit 1
fi
cp kernel mnt/kernel
umount mnt/
;;

*)
echo "something is really going wrong here!"
;;

esac

echo "recursively fixing ownership"
chown -R 0:0 *

echo "fixing sticky bit of /tmp"
chmod 1777 tmp/

echo "setting busybox setuid"
chmod u+s bin/busybox

exit 0