ttiocom.c

一个通讯程序源码

#include <sys/types.h>
#include <sys/tty.h>
#include <sys/select.h>

ttiocom(ttyp, com, arg, flag)
struct tty *ttyp;
int com, arg, flag;     /* there should be better types for this :-) */
{
        if (com == IOC_SELECT)
        {
                ttselect(ttyp, flag);
                return(0);      /*** THIS IS IMPORTANT ***/
        }
        return(Ttiocom(ttyp, com ,arg, flag));
}