io.type (obj)

Checks whether obj is a valid file handle. Returns the string "file" if obj is an open file handle, "closed file" if obj is a closed file handle, or nil if obj is not a file handle.

EVERYTHING
Input and Output Facilities
file:close•
file:flush•
file:lines•
file:read•
file:seek•
file:setvbuf•
file:write•
io.close•
io.flush•
io.input•
io.lines•
io.open•
io.output•
io.popen•
io.read•
io.tmpfile•
io.type•
io.write•

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