demo_process_close.f90

    program demo_process_close
    use M_process ,ONLY: process_open_read, process_open_write
    use M_process ,ONLY: streampointer, process_close
    implicit none
    type(streampointer) :: fp
    integer             :: ierr
      ! open process to read from
      call process_open_read('ls -l',fp,ierr)
      write(*,*)'CLOSE   : process is opened with status ',ierr
      call process_close(fp,ierr)
      write(*,*)'CLOSE   : process closed with status ',ierr
    end program demo_process_close