#include	"calld.h"#include	<fcntl.h>/* * Open the terminal line. */inttty_open(char *class, char *line, enum parity parity, int modem){	int				fd, baud;	char			devname[100];	struct termios	term;	/*	 * First open the device.	 */	strcpy(devname, "/dev/");	strcat(devname, line);	if ((fd = open(devname, O_RDWR | O_NONBLOCK)) < 0) {		sprintf(errmsg, "can't open %s: %s\n",		  devname, strerror(errno));		return(-1);	}	if (isatty(fd) == 0) {		sprintf(errmsg, "%s is not a tty\n", devname);		return(-1);	}	/*	 * Fetch then set modem's terminal status.	 */	if (tcgetattr(fd, &term) < 0)		log_sys("tcgetattr error");	if (parity == NONE)		term.c_cflag = CS8;	else if (parity == EVEN)		term.c_cflag = CS7 | PARENB;	else if (parity == ODD)		term.c_cflag = CS7 | PARENB | PARODD;	else		log_quit("unknown parity");	term.c_cflag |= CREAD |			/* enable receiver */					HUPCL;			/* lower modem lines on last close */									/* 1 stop bit (since CSTOPB off) */	if (modem == 0)		term.c_cflag |= CLOCAL;		/* ignore modem status lines */	term.c_oflag  = 0;				/* turn off all output processing */	term.c_iflag  = IXON | IXOFF |	/* Xon/Xoff flow control (default) */					IGNBRK |		/* ignore breaks */					ISTRIP |		/* strip input to 7 bits */					IGNPAR;			/* ignore input parity errors */	term.c_lflag  = 0;		/* everything off in local flag:							   disables canonical mode, disables							   signal generation, disables echo */	term.c_cc[VMIN]  = 1;	/* 1 byte at a time, no timer */	term.c_cc[VTIME] = 0;	if (strcmp(class, "38400") == 0) {		baud = B38400;	} else if (strcmp(class, "19200") == 0) {		baud = B19200;	} else if (strcmp(class, "9600") == 0) {		baud = B9600;	} else if (strcmp(class, "4800") == 0) {		baud = B4800;	} else if (strcmp(class, "2400") == 0) {		baud = B2400;	} else if (strcmp(class, "1800") == 0) {		baud = B1800;	} else if (strcmp(class, "1200") == 0) {		baud = B1200;	} else if (strcmp(class, "600") == 0) {		baud = B600;	} else if (strcmp(class, "300") == 0) {		baud = B300;	} else if (strcmp(class, "200") == 0) {		baud = B200;	} else if (strcmp(class, "150") == 0) {		baud = B150;	} else if (strcmp(class, "134") == 0) {		baud = B134;	} else if (strcmp(class, "110") == 0) {		baud = B110;	} else if (strcmp(class, "75") == 0) {		baud = B75;	} else if (strcmp(class, "50") == 0) {		baud = B50;	} else {		sprintf(errmsg, "invalid baud rate: %s\n", class);		return(-1);	}	cfsetispeed(&term, baud);	cfsetospeed(&term, baud);	if (tcsetattr(fd, TCSANOW, &term) < 0)	/* set attributes */		log_sys("tcsetattr error");	DEBUG("tty open");	clr_fl(fd, O_NONBLOCK);		/* turn off nonblocking */	return(fd);}