Added extra sanity checks for uncramfs-lzma

src/uncramfs-lzma/lzma-uncramfs.c

@@ -277,8 +277,7 @@ void do_file(const u8* base, u32 offset, u32 size,
    } else {
       if(uncompress_data(base, base+offset, size, file_data) == -1)
       {
-         printf("failed to decompress data! quitting...\n");
-         exit(EXIT_FAILURE);
+         printf("failed to decompress data\n");
       }
    }
 

uncramfs_all.sh

@@ -62,10 +62,39 @@ then
 	./src/uncramfs-lzma/uncramfs-lzma "$ROOTFS" "$FSIMG.le" 2>/dev/null
 	if [ $? -eq 0 ]
 	then
-		# Does not exist, will not be able to re-build the file system!
-		MKFS="./src/uncramfs-lzma/mkcramfs-lzma"
-		finish
-		exit 0
+		nfiles=0
+		bad=0
+
+		# Check at least the first five files to make sure they didn't just extract to all zero's
+		for FILE in $(find "$ROOTFS")
+		do
+			if [ -f "$FILE" ]
+			then
+				echo "Checking $FILE"
+
+				if [ "$(hexdump "$FILE" | wc -l)" -lt "4" ] && [ "$(hexdump "$FILE" | head -1 | grep -v '0')" == "" ]
+				then
+					((bad=$bad+1))
+				else
+					((bad=$bad-1))
+				fi
+
+				((nfiles=nfiles+1))
+			fi
+
+			if [ "$nfiles" == "5" ]
+			then
+				break
+			fi
+		done
+
+		if [ "$bad" != "$nfiles" ]
+		then
+			# Does not exist, will not be able to re-build the file system!
+			MKFS="./src/uncramfs-lzma/mkcramfs-lzma"
+			finish
+			exit 0
+		fi
 	fi
 
 	./src/cramfs-2.x/cramfsck -x "$ROOTFS" "$FSIMG.le" 2>/dev/null