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#include "config.h"
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#include "gpsd.h"
int gpsd_open(int device_speed, int stopbits, struct gps_session_t *session)
{
int ttyfd;
gpsd_report(1, "opening GPS data source at %s\n", session->gpsd_device);
if ((ttyfd = open(session->gpsd_device, O_RDWR | O_NONBLOCK)) < 0)
return -1;
if (isatty(ttyfd)) {
gpsd_report(1, "setting speed %d, 8 bits, no parity\n", device_speed);
/* Save original terminal parameters */
if (tcgetattr(ttyfd,&session->ttyset_old) != 0)
return -1;
if (device_speed < 200)
device_speed *= 1000;
if (device_speed < 2400)
device_speed = B1200;
else if (device_speed < 4800)
device_speed = B2400;
else if (device_speed < 9600)
device_speed = B4800;
else if (device_speed < 19200)
device_speed = B9600;
else if (device_speed < 38400)
device_speed = B19200;
else
device_speed = B38400;
memcpy(&session->ttyset, &session->ttyset_old, sizeof(session->ttyset));
cfsetispeed(&session->ttyset, (speed_t)device_speed);
cfsetospeed(&session->ttyset, (speed_t)device_speed);
session->ttyset.c_cflag &= ~(PARENB | CRTSCTS);
session->ttyset.c_cflag |= (CSIZE & (stopbits==2 ? CS7 : CS8)) | CREAD | CLOCAL;
session->ttyset.c_iflag = session->ttyset.c_oflag = session->ttyset.c_lflag = (tcflag_t) 0;
session->ttyset.c_oflag = (ONLCR);
if (tcsetattr(ttyfd, TCSANOW, &session->ttyset) != 0)
return -1;
}
return ttyfd;
}
void gpsd_close(struct gps_session_t *session)
{
if (session->gNMEAdata.gps_fd != -1) {
if (isatty(session->gNMEAdata.gps_fd)) {
/* force hangup on close on systems that don't do HUPCL properly */
cfsetispeed(&session->ttyset, (speed_t)B0);
cfsetospeed(&session->ttyset, (speed_t)B0);
tcsetattr(session->gNMEAdata.gps_fd, TCSANOW, &session->ttyset);
}
/* this is the clean way to do it */
session->ttyset_old.c_cflag |= HUPCL;
tcsetattr(session->gNMEAdata.gps_fd,TCSANOW,&session->ttyset_old);
close(session->gNMEAdata.gps_fd);
}
}
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