How to create a dynamic file via ABAP

Hi all,

We have a requirement of storing all internal table data into a temporary file in application server and later the same file will be passed as an input to shell script to meet our business requirement. Here I'm not sure how can we create a temporary file at run time through abap . I'm sure this is certainly possible via Java, Can any one suggest me how temporary file will be create via abap. Also please note that developer shouldn't give this file name any where from selection screen and system itself should create a file with certain name.

Please advise.

Thanks