#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/ioctl.h>

void get_winsize(struct winsize* ws);
void set_winsize(struct winsize* ws);

int main(int argc, char** argv)
{
    struct winsize ws;

    if(argc == 1)
    {
	get_winsize(&ws);
	printf("%u %u %u %u\n",
	       ws.ws_row, ws.ws_col, ws.ws_xpixel, ws.ws_ypixel);
    }
    else if(argc == 5)
    {
	get_winsize(&ws);
	if(strcmp(argv[1], "-") != 0)
	    ws.ws_row = atoi(argv[1]);
	if(strcmp(argv[2], "-") != 0)
	    ws.ws_col = atoi(argv[2]);
	if(strcmp(argv[3], "-") != 0)
	    ws.ws_xpixel = atoi(argv[3]);
	if(strcmp(argv[4], "-") != 0)
	    ws.ws_ypixel = atoi(argv[4]);
	set_winsize(&ws);
    }
    else
    {
	fprintf(stderr, "Usage: %s\n", argv[0]);
	fprintf(stderr, "Usage: %s ws_ro, ws_col ws_xpixel ws_ypixel\n",
		argv[0]);
	return 1;
    }
    return 0;
}

void get_winsize(struct winsize* ws)
{
    if(ioctl(0, TIOCGWINSZ, ws) < 0)
    {
	perror("ioctl");
	exit(1);
    }
}

void set_winsize(struct winsize* ws)
{
    if(ioctl(0, TIOCSWINSZ, ws) < 0)
    {
	perror("ioctl");
	exit(1);
    }
}