Returns the number of information items that are available for an external file
Category: External Files
See: FOPTNUM Function in the documentation for your operating environment.
FOPTNUM ( file-id )
file-id
specifies the identifier that was assigned when the file was opened, generally by the FOPEN function.
Operating Environment Information: The number, value, and type of information items that are available depend on the operating environment.
Use FOPTNAME to determine the names of the items that are available for a particular operating environment.
Use FINFO to retrieve the value of a particular information item.
This example opens the external file with the fileref MYFILE and determines the number of system-dependent file information items available:
%let fid=%sysfunc(fopen(myfile)); %let infonum=%sysfunc(foptnum(&fid));
Functions:
'DINFO Function' on page 501
'DOPTNAME Function' on page 505
'DOPTNUM Function' on page 506
'FINFO Function' on page 539
'FOPEN Function' on page 550
'FOPTNAME Function' on page 552
'MOPEN Function' on page 656
See the 'Examples' on page 552 in the FOPTNAME Function.