User`s manual

Serial Programming Tools
Intellio C320Turbo User's Manual 4-7
#include <sys/sysmacros.h>
#define MOBUFED 0x402
struct strioctl ioc;
int count; /* number of bytes queued in the output buffer */
ioc.ic_cmd = MOBUFED;
ioc.ic_timout = 0;
ioc.ic_len = sizeof(int);
ioc.ic_dp = (char *)&count;
ioctl(moxa_fd, I_STR, &ioc);
Note: See MIBUFED for influence of STREAMS driver.
3. MTCRTS
This function, only valid when hardware flow control is turned off (see
MHWFLOW), is used to turn RTS on or off.
Syntax for SCO UNIX/XENIX
#define MTCRTS 0x403
#define TurnON 1
#define TurnOFF 0
ioctl(moxa_fd, MTCRTS, TurnON);
ioctl(moxa_fd, MTCRTS, TurnOFF);
Syntax for SVR4.x UNIX/Solaris x86
#include <sys/stropts.h>
#include <sys/sysmacros.h>
#define MTCRTS 0x403
#define TurnON 1
#define TurnOFF 0
struct strioctl ioc;
int setting;
setting = TurnON /* or TurnOFF */;
ioc.ic_cmd = MTCRTS;
ioc.ic_timout = 0;
ioc.ic_len = sizeof(int);
ioc.ic_dp = (char *)&setting;
ioctl(moxa_fd, I_STR, &ioc);
4. MTCDTR