DwtOpenHierarchy(3Dwt)													    DwtOpenHierarchy(3Dwt)

Name
       DwtOpenHierarchy - Allocates a hierarchy ID and opens all the UID files in the hierarchy.

Syntax
       #include <X11/DwtAppl.h>
       Cardinal DwtOpenHierarchy(num_files, file_names_list, ancillary_structures_list,
				 hierarchy_id_return)
	    DRMCount num_files;
	    String file_names_list [];
	    IDBOSOpenParamPtr *ancillary_structures_list;
	    DRMHierarchy *hierarchy_id_return;

Arguments
       num_files Specifies the number of files in the name list.

       file_names_list
		 Specifies an array of pointers to character strings that identify the .uid files.

       ancillary_structures_list
		 A list of operating system-dependent ancillary structures corresponding to such things as file names, clobber flag, and so forth.
		 This argument should be NULL for most operations.  If you need to reference this structure,  see  the	definition  of	IDBOSOpen-
		 ParamPtr in DwtAppl.h for more information.

       hierarchy_id_return
		 Returns  the search hierarchy ID.  The search hierarchy ID identifies the list of .uid files that DRM will search (in order) when
		 performing subsequent fetch calls.

Description
       The DwtOpenHierarchy function allows the user to specify the list of UID files that DRM will search in subsequent  fetch  operations.   All
       subsequent  fetch  operations  will  return  the first occurrence of the named item encountered while traversing the UID hierarchy from the
       first list element (UID file specification) to the last list element.  This function also allocates a hierarchy ID and opens  all  the  UID
       files  in the hierarchy.  It initializes the optimized search lists in the hierarchy.  If DwtOpenHierarchy encounters any errors during its
       execution, any files that were opened are closed.

       Each UID file specified in file_names_list can specify either a full directory pathname or a file name.	If a UID file does not specify the
       pathname it will not contain any embedded slashes (/),  and it will be accessed through the UIDPATH environment variable.

       The  UIDPATH environment variable specifies search paths and naming conventions associated with UID files.  It can contain the substitution
       fields %L and %N, where the current setting of the LANG environment variable is substituted for %L and the .uid name passed to DwtOpenHier-
       archy  is  substituted  for  %N.   For  example, the following UID path and DwtOpenHierarchy call would cause DRM to open two separate .uid
       files:

	UIDPATH=/uidlib/%L/%N.uid:/uidlib/%N/%L
	 static char *uid_files[] = {"/usr/users/me/test.uid", "test2"};
	  DRMHierarchy	*Hierarchy_id;
	  DwtOpenHierarchy((DRMCount)2,uid_files, NULL, Hierarchy_id)

       The first file, /usr/users/me/test.uid, would be opened as specified, as this file specification includes a  pathname.	The  second  file,
       test2, would be looked for first in /uidlib/$LANG/test2.uid, and second in /uidlib/test2/$LANG.

       After  DwtOpenHierarchy opens the UID hierarchy, you should not delete or modify the UID files until you close the UID hierarchy by calling
       DwtCloseHierarchy.

Return Values
       This function returns one of these status return constants:

       DRMSuccess	 The   function   executed
			 successfully.
       DRMNotFound	 File not found.
       DRMFailure	 The function failed.

See Also
       DwtCloseHierarchy(3Dwt)

															    DwtOpenHierarchy(3Dwt)