Functions and CALL Routines

FOPTNUM Function

Returns the number of information items that are available for an external file.

Category:	External Files
See:	FOPTNUM Function under Windows UNIX OpenVMS z/OS

Syntax
Argument
Details
Comparisons
Examples
See Also

Syntax

FOPTNUM(file-id)

Argument

file-id: is a numeric variable that specifies the identifier that was assigned when the file was opened, generally by the FOPEN function.

Details

Operating Environment Information: The number, value, and type of information items that are available depend on the operating environment. [cautionend]

Comparisons

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.

Examples

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));