mode READ           : no
mode WRITE          : yes
mode LSEEK          : yes
mode PREAD          : yes
mode PWRITE         : yes
mode WRITER         : yes
mode CAN_READ       : no
mode CAN_WRITE      : yes
mode OPENED         : yes
buf: =========================
count: 8
pos: 20
abcdefghijklmnopqrst========CDEFGHIJKLMNOPQRSTUVWXYZ0123456789

mode READ           : yes
mode WRITE          : yes
mode LSEEK          : yes
mode PREAD          : yes
mode PWRITE         : yes
mode WRITER         : yes
mode CAN_READ       : yes
mode CAN_WRITE      : yes
mode OPENED         : yes
buf: =========================
count: 8
pos: 20
abcdefghijklmnopqrst========CDEFGHIJKLMNOPQRSTUVWXYZ0123456789

success
