openwrt-owl/target/linux/realview/image/gen_realview_sdcard_img.sh

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#!/usr/bin/env bash
set -x
[ $# -eq 3 ] || {
echo "SYNTAX: $0 <file> <rootfs image> <rootfs size>"
exit 1
}
OUTPUT="$1"
ROOTFS="$2"
ROOTFSSIZE="$3"
head=4
sect=63
set `ptgen -o $OUTPUT -h $head -s $sect -l 4096 -t 83 -p ${ROOTFSSIZE}M`
ROOTFSOFFSET="$(($1 / 512))"
ROOTFSSIZE="$(($2 / 512))"
dd bs=512 if="$ROOTFS" of="$OUTPUT" seek="$ROOTFSOFFSET" conv=notrunc