@c "fn/fopen.texi"
@c extracted from "../../lib/libchpfn/io.cc"
@c by "$(top_srcdir)/scripts/extract_texinfo.awk".

@deffn Function fopen file
Open file @var{file} for writing, overwrite previous contents.
Subsequent calls to @command{fprint} will still continue to append
to the file.  
If the file stream is already open, do nothing.  
Return true if the stream is opened successfully (or was already open).  
@end deffn

