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61 lines
1.1 KiB
Bash
Executable File
61 lines
1.1 KiB
Bash
Executable File
#!/usr/bin/env bash
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# Copyright (C) 2006 OpenWrt.org
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[ $# == 5 ] || {
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echo "SYNTAX: $0 <file> <kernel size> <kernel directory> <rootfs size> <rootfs image>"
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exit 1
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}
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file="$1"
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part1s="$2"
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part1d="$3"
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part2s="$4"
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part2f="$5"
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head=16
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sect=63
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cyl=$(( ($part1s + $part2s) * 1024 * 1024 / ($head * $sect * 512)))
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dd if=/dev/zero of="$file" bs=1M count=$(($part1s + $part2s)) 2>/dev/null || exit
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fdisk -u -C $cyl -H $head -S $sect "$file" > /dev/null 2>/dev/null <<EOF
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n
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p
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1
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+$(($part1s * 1024))K
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n
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p
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2
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w
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q
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EOF
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block() {
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echo -e 'p\nq' | fdisk -u -C $cyl -H $head -S $sect "$file" | awk -v file="$file$1" -v n="$(($2 + 2))" '
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$1 == file {
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print $n * 512
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}'
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}
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start="$(block 1 0)"
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end="$(block 1 1)"
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blocks="$(( ($end - $start) / 1024 ))"
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genext2fs -d "$part1d" -b "$blocks" "$file.kernel"
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dd if="$file.kernel" of="$file" bs=512 seek="$(($start / 512))" conv=notrunc
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rm -f "$file.kernel"
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start="$(block 2 0)"
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dd if="$part2f" of="$file" bs=512 seek="$(($start / 512))" conv=notrunc
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which chpax >/dev/null && chpax -zp $(which grub)
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grub --device-map=/dev/null <<EOF
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device (hd0) $file
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geometry (hd0) $cyl $head $sect
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root (hd0,0)
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setup (hd0)
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EOF
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