file-system-p

Arguments: pathname-or-string

In earlier releases, this function was exported from the aclwin package. Now its home package is excl, though it is still exported from aclwin for compatibility.

Returns whether this existing file or directory is part of, or is used exclusively by, the operating system. Errors if pathname-or-string does not name an existing file or directory.

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Created 2015.5.21.