User`s manual

Table Of Contents

4-6 Intellio C320Turbo/PCI User's Manual

Syntax for UNIX SVR4

#include <sys/stropts.h>

#include <sys/sysmacros.h>

#define MIBUFED 0x401

struct strioctl ioc;

int count; /*number of bytes queued in the buffer */

ioc.ic_cmd = MIBUFED;

ioc.ic_timout = 0;

ioc.ic_len = sizeof(int);

ioc.ic_dp = (char *)&count;

ioctl(moxa_fd, I_STR, &ioc);

Note: Due to the characteristics of STREAMS driver, the returned count of bytes buffered

only reflect the data buffered on MOXA board, not including the data buffered in STREAMS

queue. In this case, the count is for reference only. For example, returned count may always

be zero, but there still are data buffered in STREAMS queue.

2. MOBUFED

This function let you know the byte count queued in output buffer when this function

is issued.

Syntax for SCO UNIX/XENIX

#define MOBUFED 0x402

int count; /* number of bytes queued in the output buffer */

ioctl(moxa_fd, MOBUFED, &count);