31 lines
609 B
Bash
31 lines
609 B
Bash
#!/bin/sh
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#
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# do like as disklabel -B
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# --written by Yasha
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#
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# usage: writeboot <boot_file> <boot_device(raw)>
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#
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case "$#" in
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2) ;;
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*) echo "usage: `basename $0` fdboot /dev/rfd?a" >&2
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exit 1;;
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esac
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boot="$1"
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rootdev="$2"
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temp=/tmp/writeboot$$
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set - `ls -lLd "$boot"`
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case "$5" in [1-9]*) :;; *) exit 1;; esac
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nblock=`expr \( $5 + 1023 \) / 1024 `
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trap "rm -f $temp; exit 1" 1 2 3 15
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rm -f $temp
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( dd if="$boot" bs=64 count=1
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dd if="$rootdev" bs=1024 count=1 | dd bs=4 skip=16 count=69
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dd if="$boot" bs=340 skip=1 ) > $temp
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cat $temp /dev/zero | dd bs=1024 count=$nblock of="$rootdev"
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rm -f $temp
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