CLI Chat Mockup for libstrophe

cli_chat.c

#include <sys/ioctl.h>
#include <stdio.h>
#include <unistd.h>
#include <stdbool.h>
#include <string.h>

#define POS(ROW,COL) printf("\033[%i;%iH", ROW, COL)

struct winsize w;

void clear_screen()
{
	ioctl(0, TIOCGWINSZ, &w);
	for(int row=0;row<=w.ws_row;row++)
		for(int col=0;col<=w.ws_col;col++)
			POS(row,col),printf(" ");
}

bool read_user(char*msg,int len)
{
	ioctl(0, TIOCGWINSZ, &w);
	POS(w.ws_row, 0),printf(">");
	if(fgets(msg, len, stdin) == NULL)
		return false;
	/* remove trailing linefeed */
	msg[strcspn(msg, "\r\n")] = 0;
	return true;
}

void print_received(char* message){
	int len = strlen(message);
	ioctl(0, TIOCGWINSZ, &w);
	POS(w.ws_row, w.ws_col-len),printf("%s<\n", message);
}

int main (void){
	clear_screen();
	
	char my_message[1024];
	while(read_user(my_message, sizeof(my_message))){
		//send(my_message);
		/* pseudo-random reply chance */
		if(*my_message&1)
			print_received(my_message);
	}
	return 0;
}