71 wiersze
1.7 KiB
Bash
Executable File
71 wiersze
1.7 KiB
Bash
Executable File
#!/usr/bin/env bash
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set -eo pipefail
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image="$1"; [ -z "$1" ] && { echo "No image file specified." >&2; exit 1; }
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inspect () {
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( #Jerry-rig error handling onto debugfs
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{ debugfs -R "$*" "$image" 1>&3; } 2>&1 | tail -n +2 |\
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{ if IFS= read -r line; then
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printf '%s\n' "$line"
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cat; exit 1
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fi; } >&2
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) 3>&1 | cat #Never invoke pager.
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}
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BLOCKSIZE=`inspect stats | sed -nE 's/^Block size:\s+([0-9]+)$/\1/p'`
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#Prefer same filesystem for efficiency on large files
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TMPDIR="$(mktemp -d "`pwd`/.pool.XXXXXXXX")" || "$(mktemp -d)" || exit 1
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trap 'rm -rf -- "$TMPDIR"' EXIT
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size () {
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inspect stat "$1" \
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| head -n3 \
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| sed -nE 's/.*Size: ([0-9]+).*/\1/p'
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}
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extents () {
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remainder=$((`size $1`%BLOCKSIZE))
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inspect dump_extents "$1" \
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| tail -n +2 \
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| awk '{print $5, $8, $11}' \
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| sed '$s/$/ '$remainder'/'
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}
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THRESHOLD=${THRESHOLD:-$((1024*1024))}
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listall () {
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if [ $# -eq 0 ]; then
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listall "`inspect ls -p /`"
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wait; return
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fi
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perl -p -e 's!/\n$!/\x0!g' <<< "$1" \
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| while IFS=/ read -r -d $'\0' _ inode itype _ _ name isize; do
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case ${itype:0:3} in
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'100') [ $isize -ge $THRESHOLD ] && echo $inode $isize;;
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'040') [[ "${name}" != @(.|..) ]] && {
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echo "Recursing into $name" >&2;
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listall "`inspect ls -p "<$inode>"`" & };;
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esac
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done
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}
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mkdir -p pool
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{
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echo -e "#BLOCKSIZE=$BLOCKSIZE\n#INODE SHA256SUM\n#INDEX BLOCK LENGTH [REMAINDER]"
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listall \
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| while IFS=' ' read -r -d $'\n' inode isize; do
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#TODO: Make asynchronus
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tmp="$(mktemp -p "$TMPDIR")"
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sha=`inspect dump "<$inode>" /dev/stdout \
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| tee "$tmp" \
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| sha256sum \
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| cut -d' ' -f1`
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[ -f pool/$sha ] \
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&& rm -f "$tmp" \
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|| mv -v "$tmp" pool/$sha 1>&2
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echo $inode $sha
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extents "<$inode>"
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done
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} > ${2:-/dev/stdout}
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