Started working on the main library (nearly complete)

extraction_options.go

@@ -0,0 +1,21 @@
+package squashfs
+
+import (
+	"io"
+	"io/fs"
+)
+
+type ExtractionOptions struct {
+	LogOutput          io.Writer   //Where error log should write.
+	DereferenceSymlink bool        //Replace symlinks with the target file.
+	UnbreakSymlink     bool        //Try to make sure symlinks remain unbroken when extracted, without changing the symlink.
+	Verbose            bool        //Prints extra info to log on an error.
+	IgnorePerm         bool        //Ignore file's permissions and instead use Perm.
+	Perm               fs.FileMode //Permission to use when IgnorePerm. Defaults to 0777.
+}
+
+func DefaultOptions() *ExtractionOptions {
+	return &ExtractionOptions{
+		Perm: 0777,
+	}
+}