Moxa Technologies C168HS user manual Syntax for SCO UNIX/OpenServer, Syntax for Unix SVR4.2

Serial Programming Tools

Syntax for SCO UNIX/OpenServer

#define MIBUFED	0x401
int	count; /* number of bytes queued in the buffer */
ioctl(moxa_fd, MIBUFED, &count);
Syntax for UNIX SVR4.2
#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/OpenServer

#define MOBUFED 0x402

intcount; /* number of bytes queued in the output buffer */

ioctl(moxa_fd, MOBUFED, &count);

Smartio C168H/HS User’s Manual 4-7