windvn/path/wdvn-initrd-extract

25 lines
506 B
Bash
Executable File

#!/bin/bash
set -e
OLDPWD="$PWD"
INPUT="$1"
OUTPUT="$2"
TEMP="$2.tmp"
TYPE="$(file -b -L "$INPUT")"
mkdir -p "$TEMP/basic"
if [[ "$TYPE" == *"cpio archive"* ]]; then
mkdir -p "$TEMP/microcode"
cd "$TEMP/microcode"
BLOCKS="$(cpio -i <"$INPUT" 2>&1 >/dev/null | tail -1)"
BLOCKS="${BLOCKS%% *}"
dd if="$INPUT" of="$TEMP/initrd.img" bs=512 skip=$BLOCKS
cd "$TEMP/basic"
zcat "$TEMP/initrd.img" | cpio -i
rm "$TEMP/initrd.img"
else
cd "$TEMP/basic"
zcat "$INPUT" | cpio -i
fi
mv "$TEMP" "$OUTPUT"