dblsd

#!/bin/bash

set -e

if [ -f "$1" ]; then
	echo $1 already exists, specify new file
	exit 2
fi

echo building database, this will take a while...

sqlite3 $1 "create table libs(symbol TEXT, object TEXT, file TEXT, hash TEXT, path TEXT, size TEXT, start TEXT);"

find -H / -name "*.a" -type f -print 2> /dev/null | while read f; do
	name=$(basename $f)
	path=$(dirname $f)
	
	nm -S $f | while read g; do
		line=$(echo $g | sed -n 's/\(.*\.o\):/\1/p')
		symbol=$(echo $g | sed -n 's/^.*[tT]\ //p')

		if [ -n "$line" ]; then
			object=$line
		fi
		
		if [ -n "$object" ] && [ -n "$symbol" ]; then
			size=$(echo $g | sed -n "s/^[0-f]*\s\([0-f]*\).*\ $symbol/\1/p" | sed -n 's/^0*//p')
			ar x $f $object
			if [ -z "$size" ]; then
				rm "$object"
				echo invalid size, skipping entry $object, $symbol, $g, $path, $name
				continue
			fi
			start=$(objdump -Fd "$object" | sed -n "s/.* <$symbol> (File Offset: 0x\(.*\)):$/\1/p")
			dd bs=1 skip="$((16#$start))" count="$((16#$size))" if="$object" of=.hash status=none
			hash=$(sha256sum .hash | sed s/\ .*$//)
			sqlite3 $1 "insert into libs values('$symbol', '$object', '$name', '$hash', '$path', '$size', '$start');" 
			rm "$object"
		fi

	done
done