How to check whether the Application Server directory exits or not

Hi,
I have a selection screen in which I give the Application server file name(UNIX file) as input. Here, I would like to check whether the Server directory exists or not.
Let us say, the path I gave in the selection screen is /usr/sap/tmp/testfile.txt . Here, the file name is testfile.txt and the server directory is /usr/sap/tmp . I would like to check whether this directory /usr/sap/tmp exists in the server or not. I am not bothered about the file name as I am going to write data into the file. I am mainly concerned about whether the directory exists in the server or not. and one more thing... this is the Application Server path not the Local path.
Can anyone help me on the same how to check whether the server directory exists or not.
Thanks in advance.
Best Regards,
Pradeep.

Also you can use the FM EPS_GET_DIRECTORY_LISTING for this purpose.
Store the directory name
    l_dpath = p_file+0(l_no).
Validate the directory of the application server
    CALL FUNCTION 'EPS_GET_DIRECTORY_LISTING'
      EXPORTING
        dir_name               = l_dpath
      TABLES
        dir_list               = l_i_dlist
      EXCEPTIONS
        invalid_eps_subdir     = 1
        sapgparam_failed       = 2
        build_directory_failed = 3
        no_authorization       = 4
        read_directory_failed = 5
        too_many_read_errors   = 6
        empty_directory_list   = 7
        OTHERS                 = 8.
If any problem occurs with the directory then display proper
error message
    IF sy-subrc <> 0.
    Display error message
      MESSAGE e018 WITH 'Problem with directory entered'(008).
    ENDIF. " sy-subrc <> 0
Regards,
Joy.

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