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a few questions about file-options


Is there a particular reason FILE-OPTIONS is a macro?

Should there be a FILE-OPTIONS-DIFFERENCE in addition to

The option "append" is described as

  writes are appended to existing contents

What happens if we then seek to the begining of the file and write?
Does it perform a seek to the end before every write as in POSIX,
or on some platforms may this simply start the output at the end
of the file?