append-to-output-file
Location: sys-unix, 8 Lines
; Scheme 9 from Empty Space, Unix Function Library ; By Nils M Holm, 2010 ; Placed in the Public Domain ; ; (append-to-output-file string) ==> output-port ; ; Take a string naming an output file and return an output port ; capable of writing characters to the that file. Characters ; written to the port will be appended to the file. When the ; file does not exist when this procedure is called, it will ; be created. If the file cannot be opened, an error is signalled. ; ; This function has been superseded by the OPEN-APPEND-FILE ; primitive procedure in S9fES Reimagined. ; ; (Example): (append-to-output-file "logfile") ==> #<output-port> (require-extension sys-unix) (define (append-to-output-file path) (let ((fd (if (file-exists? path) (sys:open path sys:write-only) (sys:creat path #o644)))) (sys:lseek fd 0 sys:seek-end) (sys:make-output-port fd)))