fiasco: Respect simulate flag

src/fiasco.c

@@ -532,11 +532,13 @@ int fiasco_unpack(struct fiasco * fiasco, const char * dir) {
 
 		printf("    Output file: %s\n", name);
 
+		if ( ! simulate ) {
 			fd = open(name, O_RDWR|O_CREAT|O_TRUNC, 0644);
 			if ( fd < 0 ) {
 				ERROR_INFO("Cannot create output file %s", name);
 				return -1;
 			}
+		}
 
 		free(name);
 
@@ -552,11 +554,13 @@ int fiasco_unpack(struct fiasco * fiasco, const char * dir) {
 
 		if ( image->layout ) {
 
+			if ( ! simulate ) {
 				fd = open(layout_name, O_RDWR|O_CREAT|O_TRUNC, 0644);
 				if ( fd < 0 ) {
 					ERROR_INFO("Cannot create layout file %s", layout_name);
 					return -1;
 				}
+			}
 
 			free(layout_name);