int isatty(int fd);
‘Fisatty,fd’
Returns 1 if fd refers to the ROCGDB console, 0 otherwise.
EINTRThe call was interrupted by the user.
Note that the isatty call is treated as a special case: it returns
1 to the target if the file descriptor is attached
to the ROCGDB console, 0 otherwise. Implementing through system calls
would require implementing ioctl and would be more complex than
needed.