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openwrt/target/linux/layerscape/base-files/lib/preinit/02_sysinfo_fixup

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do_sysinfo_layerscape_fixup() {
[ -e /tmp/sysinfo/board_name ] || return
[ -e /proc/cmdline ] || return
cmdline=$(strings /proc/cmdline)
case "${cmdline}" in
*root=/dev/mmcblk*)
board="$(strings /tmp/sysinfo/board_name)-sdboot"
echo ${board} > /tmp/sysinfo/board_name
;;
esac
}
boot_hook_add preinit_main do_sysinfo_layerscape_fixup