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#include "config.h"
#include <stdio.h>
#include <string.h>
#if HAVE_FCNTL_H
# include <fcntl.h>
#endif
#include <stdlib.h>
#if TIME_WITH_SYS_TIME
# include <sys/time.h>
# include <time.h>
#else
# if HAVE_SYS_TIME_H
# include <sys/time.h>
# else
# include <time.h>
# endif
#endif
#if HAVE_UNISTD_H
# include <sys/types.h>
# include <unistd.h>
#endif
#if HAVE_TERMIOS_H
# include <termios.h>
#else
# if HAVE_TERMIO_H
# include <termio.h>
# else
# if HAVE_SYS_IOCTL_H
# include <sys/ioctl.h>
# endif
# include <sgtty.h>
# endif
#endif
#if HAVE_TTOLD_H
# include <ttold.h>
#endif
#include "common.h"
#include "tty.h"
#define TTYTIMEOUT 10
int changespeed(fd, baud)
int fd;
int baud;
{
#if HAVE_TERMIOS_H
/* termios interface */
struct termios tio;
if (tcgetattr(fd, &tio) < 0) {
fprintf(stderr, " Can't get tty attribute.\n");
close(fd);
return(-1);
}
tio.c_iflag = 0;
tio.c_oflag = 0;
tio.c_cflag = CS8 | CREAD | CLOCAL ; /* 8bit non parity stop 1 */
tio.c_lflag = 0;
tio.c_cc[VMIN] = 1;
tio.c_cc[VTIME] = 5 ;
cfsetispeed(&tio, baud);
cfsetospeed(&tio, baud);
if (tcsetattr(fd, TCSANOW, &tio) < 0) {
perror("Can't set tty attribute.\n");
return(-1);
}
#else
# if HAVE_TERMIO_H
/* termio interface */
/* # error not implemented yet. */
fprintf(stderr,"sorry not inplemented yet.\n");
# else
/* sgtty interface */
struct sgttyb ttyb;
if (ioctl(fd, TIOCGETP, &ttyb) < 0) {
perror("Can't get tty attribute.\n");
return(-1);
}
ttyb.sg_ispeed = baud;
ttyb.sg_ospeed = baud;
ttyb.sg_flags = 0; /* 8bit non parity stop 1 */
if (ioctl(fd, TIOCSETP, &ttyb) < 0) {
perror("Can't set tty attribute.\n");
return(-1);
}
# endif
#endif
flushtty(fd);
return(1);
}
int opentty(path)
char *path;
{
int fd;
struct termios tio;
if ((fd = open(path, O_RDWR | O_NDELAY )) != -1) {
#if HAVE_TERMIOS_H
#else
if(ioctl(fd, TIOCEXCL, 0) < 0){
fprintf(stderr, "Can't set tty exclusive mode.\n");
return(-1);
}
if(ioctl(fd, TIOCHPCL, 0) < 0){
fprintf(stderr, "Can't set tty hold mode.\n");
return(-1);
}
#endif
if(changespeed(fd, DEFAULTBAUD) < 0)
return(-1);
}else{
fprintf(stderr, "Can't open tty.\n");
return(-1);
}
return(fd);
}
int readtty(fd, p, c)
int fd;
unsigned char *p;
int c;
{
fd_set readfds;
int nfds;
struct timeval tv;
int i,j;
unsigned char u;
FD_ZERO(&readfds);
FD_SET(fd, &readfds);
tv.tv_sec = TTYTIMEOUT;
tv.tv_usec = 0;
for(j = 0 ; j < c ; j++){
nfds = select( fd +1 , &readfds, NULL, NULL, &tv);
if(nfds == 0){
fprintf(stderr,"tty not respond. time up.\n");
return(0);
} else {
if(FD_ISSET(fd, &readfds)){
if(read(fd, &u, 1) < 0){
fprintf(stderr,"tty read fail.\n");
return(-1);
}
*p = u;
p++;
}
}
}
return(j);
}
void flushtty(fd)
int fd;
{
u_char c;
fd_set readfds;
int nfds;
struct timeval tv;
int i,j;
unsigned char u;
FD_ZERO(&readfds);
FD_SET(fd, &readfds);
tv.tv_sec = 0;
tv.tv_usec = 0;
while (1) {
nfds = select(fd +1 , &readfds, NULL, NULL, &tv);
if(nfds == 0){
return;
} else {
if(FD_ISSET(fd, &readfds)){
if(read(fd, &c, 1) < 0){
fprintf(stderr,"tty read fail.\n");
return;
}
}
}
}
}
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