testing MPI_File_get_amode
setting atomic mode
reverting back to nonatomic mode
testing MPI_File_get_view
testing MPI_File_get_byte_offset
testing MPI_File_set_size
seeking to eof and testing MPI_File_get_position
testing MPI_File_get_byte_offset
testing MPI_File_seek with MPI_SEEK_CUR
preallocating disk space up to 8192 bytes
closing the file and deleting it