Porting serial device from Linux to QNX

Porting serial device code from Linux to QNX is relatively straightforward since QNX implements the POSIX standard for serial communications. Core functions like tcgetattr(), tcsetattr(), and the entire termios structure remain identical. The main differences lie in device naming (/dev/tty* in Linux becomes /dev/ser* in QNX), and QNX's additional device control commands through devctl() (versus Linux's ioctl()). QNX's devc-ser* drivers provide extra features through devctl() commands defined in <sys/dcmd_chr.h>, such as enhanced logging (DCMD_CHR_ENABLE_LOGGING), verbosity control (DCMD_CHR_SETVERBOSITY), and detailed line status querying (DCMD_CHR_LINESTATUS). You can port most Linux serial code by simply updating the device paths and optionally taking advantage of QNX's additional debugging and control features, while keeping the core POSIX serial communication code unchanged.