The LGI$ICR_JOBSTEP routine alerts the site of each job step in a
    batch job. The routine is invoked as LOGINOUT processes each job
    step. For the first job step, the LGI$ICR_JOBSTEP callout routine
    is invoked immediately following the LGI$ICR_IDENTIFY callout
    routine. For all other job steps, it is the only callout routine
    that is invoked.

    The routine is provided with the input file name, but the input
    file is not open when the routine is called. For the first job
    step, the LGI$ICR_INIT callout routine may provide the batch
    job step routine with context. For other job steps, the context
    argument is a null.

    For all job steps except the first, the output file is open, and
    the routine specified by the write_fao argument is available.

    There is no OpenVMS policy associated with LGI$ICR_JOBSTEP.