virtual_serial.c
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/*
* Virtual Serial library
*/
////
// Include files
////
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <termios.h>
#include <strings.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/file.h>
#include <linux/serial.h>
#include <pty.h>
#include "virtual_serial.h"
////
// Functions
////
//
// Serial structure filling
//
static struct termios serialConfig(int speed){
int fspeed;
switch(speed){
case 1200: fspeed=B1200; break;
case 2400: fspeed=B2400; break;
case 4800: fspeed=B4800; break;
case 9600: fspeed=B9600; break;
case 19200: fspeed=B19200; break;
case 38400: fspeed=B38400; break;
case 57600: fspeed=B57600; break;
case 115200: fspeed=B115200; break;
default: fprintf(stderr,"Unknown serial speed %d.\n",speed); exit(-1);
}
struct termios new;
bzero(&new,sizeof(new));
new.c_cflag=CLOCAL|CREAD|fspeed|CS8;
new.c_iflag=0;
new.c_oflag=0;
new.c_lflag=0; /* set input mode (non-canonical, no echo,...) */
new.c_cc[VTIME]=0; /* inter-character timer unused */
new.c_cc[VMIN]=1; /* blocking read until 1 char received */
return new;
}
//
// Virtual serial creation
//
int virtualSerialOpen(char *name,int speed){
int master;
int slave;
struct termios serial=serialConfig(speed);
openpty(&master,&slave,name,&serial,NULL);
return master;
}
//
// Serial port termination
//
void virtualSerialClose(int fd){
close(fd);
}