This chapter describes the (rnrs files (6))library for operations on the file system. This library, in addition to the procedures described here, also exports the I/O condition types described in section 8.1.
Filename must be a filename (see section 8.2.1). The file-exists? procedure returns #t if the named file exists at the time the procedure is called, #f otherwise.
Filename must be a filename (see section 8.2.1). The delete-file procedure deletes the named file if it exists and can be deleted, and returns unspecified values. If the file does not exist or cannot be deleted, an exception with condition type &i/o-filename is raised.