The filebox command displays a dialog box on screen, offering users the choice of opening or saving files. Upon successful selection of a file, the full path to the selected file is printed to standard output, and a value of 0 is returned. Upon abort by the user, nothing is printed to standard output and a value of 1 is returned.
Options -a requires file to already exist.
If file does not exist, the user is warned and prompted for another file name. If you respond yes , the program exits successfully. If you respond no , filebox prompts for another file name. With the -V option, this dialog can also be used to select computer names. The default extension ext is only appended to files if the user fails to specify an extension.