C++ (Cpp) write_tty Examples

Example #1

File: wterm.c Project: hchunhui/myos

int do_pipe()
{
	int n;
	char buf[1024];
	n = read(pipe_out, buf, 1024);
	write_tty(buf, n);
	return 0;
}

Example #2

File: telescope.c Project: eddyem/eddys_snippets

/**
 * write command
 * @return answer or NULL if error occured (or no answer)
 */
static char *write_cmd(const char *cmd){
    DBG("Write %s", cmd);
    if(write_tty(cmd, strlen(cmd))) return NULL;
    double t0 = dtime();
    static char *ans;
    while(dtime() - t0 < T_POLLING_TMOUT){ // read answer
        if((ans = read_string())){ // parse new data
            DBG("got answer: %s", ans);
            return ans;
        }
    }
    return NULL;
}

Example #3

File: client.c Project: eddyem/eddys_snippets

int send_command(char *cmd){
	int L = strlen(cmd);
	size_t R = 0;
	char ans[256];
	write_tty(cmd, L);
	R = read_ctrl_command(ans, 255);
//	DBG("readed: %s (cmd: %s, R = %zd, L = %d)\n", ans, cmd, R, L);
	if(!R || (strncmp(ans, cmd, L) != 0)){
		fprintf(stderr, "Error: controller doesn't respond (answer: %s)\n", ans);
		return 0;
	}
	R = read_ctrl_command(ans, 255);
//	DBG("readed: %s\n", ans);
	if(!R){ // controller is running or error
		fprintf(stderr, "Controller doesn't answer!\n");
		return 0;
	}
	return parse_ctrlr_ans(ans);
}