- open-append filenameprocedure
Open a file for appending.
Open a file for writing, in platform-independent notation and in relation to the write dir as the root of the writable filesystem. The specified file is created if it doesn't exist. If it does exist, the writing offset is set to the end of the file, so the first write will be the byte after the end.
Note that entries that are symlinks are ignored if (permitSymbolicLinks #t) hasn't been called, and opening a symlink with this function will fail in such a case.