The following code obtains the status of the file system containing the previously looked-up file whose vnode token is in VNODETOK. For the callable service, see v_fstatfs (BPX1VSF, BPX4VSF) — Return file system status. For the data structures, see BPXYOSS — Map operating system specific information and Mapping macros in z/OS UNIX System Services Programming: Assembler Callable Services Reference.

         MVC   OSSSTOR,OSS           Initialize BPXYOSS area
         SPACE ,
         CALL  BPX1VSF,              Obtain file system status         +
               (VNODETOK,            Input: Vnode token                +
               OSSSTOR,              Input/output: BPXYOSS             +
               =A(SSTF#LENGTH),      Input: BPXYSSTF length            +
               SSTF,                 Output: BPXYSSTF                  +
               RETVAL,               Return value: 0 or -1             +
               RETCODE,              Return code                       +
               RSNCODE),             Reason code                       +
               VL,MF=(E,PLIST)       ----------------------------------