Safe way to open new file and unlock an existing file to enable deletion, if it exists

New to Julia
, ,
1

Assume you have the habit to use the variable fid as an IOStream-variable and you are not sure, if the related file is still open (it might be that a process has crashed or you have forgotten to close the old not longer used IOStream properly), how could you reuse this file name without a restart of Julia?
Here my proposal:

function MyLibOpenTxtIOStream(_fn::AbstractString, _fid::String, _openTxtIOStream::Bool=true)
    getvars() = [string(v) for v in sort!(names(Main)) if isdefined(Main, v) && !(v in (:Base, :Main, :Core, :InteractiveUtils, :ans))]
    if ispath(_fn)
        if any(occursin.(_fid, getvars()))
            _s = Symbol(_fid)
            if @eval(Base.@isdefined($_s))
                if @eval(isa($_s, IOStream))
                    @eval(close($_s))
                    GC.gc() # garbage collection
                end
            end
        end  
        rm(_fn, force = true)
    end  
    _dir, _ = splitdir(_fn)
    if ispath(_dir)
        if _openTxtIOStream
            return  open(_fn, "w")
        else    
            return missing
        end
    else
        error("Path does not exist!")
    end
end

fid = open_new_IOStream("/tmp/file.txt", "fid")

Now my question: Is this code somehow fishy?

Remark:
The getvars() is taken from: Recommended way to delete user-defined variables