80x24 changer

//by Wiesław Herr <herself at makhleb.net>, distributed under the MIT license
//this program changes the terminal size to 80x24 regardless of the actual window size
#include <stdio.h>
#include <stdlib.h>

#ifdef __linux
#include <pty.h>
#else //*bsd
#include <sys/ttycom.h>
#endif

int main(int argc, const char *argv[])
{
    struct winsize ws;
    int ret;

    ret = ioctl(0, TIOCGWINSZ, &ws);
    if(ret < 0){
        perror("ioctl");
        return 1;
    }
    printf("Current window size: %dx%d\n", ws.ws_col, ws.ws_row);

    ws.ws_col=80;
    ws.ws_row=24;
    ws.ws_xpixel=0;
    ws.ws_ypixel=0;

    ioctl(0, TIOCSWINSZ, &ws);
    if(ret < 0){
        perror("ioctl");
        return 1;
    }
    printf("Window size reset!\n");

    ioctl(0, TIOCGWINSZ, &ws);
    if(ret < 0){
        perror("ioctl");
        return 1;
    }
    printf("Current window size: %dx%d\n", ws.ws_col, ws.ws_row);

    return 0;
}