$SETDDIR

   Allows you to read and change the default directory string for
   the process. Do not include any device or file name strings in
   the default directory string; include only the [DIR] syntax.
   Modify the device portion of the current default directory
   location through the specification of the SYS$DISK logical name.
   Redefine this logical name using either the $CRELNM edtsystem
   service or the LIB$SET_LOGICAL RTL routine.

   Format

     SYS$SETDDIR  [new-dir-addr] ,[length-addr] ,[cur-dir-addr]

   C Prototype

     int sys$setddir  (void *newdiraddr, unsigned short int

                      *lengthaddr, void *curdiraddr);
 

Additional information available:

Arguments