Authorization for the user to write/read/create a file in application serve

Question

Hi experts.
I am uploading some data to a file in a folder in application server, created in AL11 tcode.
In my program i need to restrict the unauthorized users to create/write/read a file in app server.
I dont know how to do this.
Kindly give me the code, please it wil be helpfull for you all.
I dont know how to use the auth object or function module, to do this.
Is the basis/security people need to do something.
Kindly revert me back ASAP.
KK

Answer 1

Or use AUTHORITY_CHECK_DATASET function module before the open data set
This function module allow you to check the user's authorization to access files (with the key words OPEN DATASET, READ DATASET, TRANSFER and DELETE DATASET). A check should be performed before opening a file.
The authorization check is performed uwing the authorization object S_DATASET.
Description of function parameters:
PROGRAM: Name of the ABAP/4 program that contains the file access. If no program name is specified, the system assumes the current program.
ACTIVITY: Access type. The possible values are:
READ: Read file
WRITE: Change file
READ_WITH_FILTER: Read file with filter function
WRITE_WITH_FILTER: Change file with filter function
DELETE: Delete file
FILENAME: Name of accessed file
Example
Notes
The values to be passed as the ACTIVITY are defined as constants in the TYPE-POOL SABC.