“Search Files 6.x-2.x allows search­ing for files in node attach­ments and in arbi­trary direc­to­ries. Text is extracted by exter­nally pro­vided helper appli­ca­tions. In order to extract text, this mod­ule calls helper apps such as cat and pdfto­text. Dru­pal admin­is­tra­tors can con­fig­ure any helpers they like. Helper apps need to be installed on the server and need to be setup to print to stdout.”