DOPTNUM Function

Returns the number of information items that are available for a directory.

Category:	External Files
See:	DOPTNUM Function: Windows in SAS Companion for Windows
	DOPTNUM Function: UNIX in SAS Companion for UNIX Environments
	DOPTNUM Function: z/OS in SAS Companion for z/OS

Syntax

DOPTNUM(directory-id)

Required Argument

directory-id

is a numeric variable that specifies the identifier that was assigned when the directory was opened by the DOPEN function.

Details

Operating Environment Information: The number, names, and nature of the directory information varies between operating environments. The number of options that are available for a directory varies depending on the operating environment. For details, see the SAS documentation for your operating environment.

Examples

Example 1: Retrieving the Number of Information Items

This example retrieves the number of system-dependent directory information items that are available for the directory MYDIR and closes the directory:

%let filrf=mydir;
%let rc=%sysfunc(filename(filrf,physical-name));
%let did=%sysfunc(dopen(&filrf));
%let infocnt=%sysfunc(doptnum(&did));
%let rc=%sysfunc(dclose(&did));

Example 2: Using DOPTNUM within a DATA Step

This example creates a data set that retrieves the number of system-dependent information items that are available for the MYDIR directory:

data _null_;
   rc=filename("mydir","physical-name");
   did=dopen("mydir");
   infocnt=doptnum(did);
   rc=dclose(did);
run;