int lcd_send_byte(unsigned char byte) {
lcd_connect();
unsigned char data[1];
data[0] = byte;
int ret = write(serial_fd, data, 1);
return ret;
}
int main(int argc, char* argv[])
{
signal(SIGINT, signal_term);
signal(SIGTERM, signal_term);
int daemon_mode = (argc > 1 && strcmp(argv[1], "-d") == 0) ? 1 : 0;
if (daemon_mode) {
if (file_exists(file_pid)) {
perror("already running");
exit(1);
}
pid_t pid = fork();
// fork failed
if (pid < 0) {
return -1;
} else if (pid != 0) {
// fork successed, parent exit
return 0;
}
write_pid();
setsid();
chdir("/");
umask(0755);
close(0);
close(1);
close(2);
}
lcd_connect();
lcd_reset();
lcd_clear();
lcd_toggle_backlight();
sleep(1);
do {
show_hostname();
show_time();
show_uptime();
show_mems();
show_loads();
show_diskspace(DEFAULT_DISKSPACE_DIR);
show_ip(DEFAULT_NETWORK_INTERFACE);
show_traffic(DEFAULT_NETWORK_INTERFACE);
sleep(10);
} while (!signal_term_received);
lcd_clear();
lcd_reset();
lcd_disconnect();
unlink(file_pid);
return 0;
}
int lcd_send_data(unsigned char *data, int len) {
lcd_connect();
int ret = write(serial_fd, data, len);
return ret;
}
