src/bin/tsize.c


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#include <stdio.h>
#include <signal.h>
#include <unistd.h>
#include <sys/ttycom.h>
#include <sys/ioctl.h>

void winhand(int sig) {
 struct winsize ws;
 ioctl(0,TIOCGWINSZ,&ws);
 printf("%d x %d\n",ws.ws_col,ws.ws_row);
}

#if 0
struct winsize {
        unsigned short  ws_row;         /* rows, in characters */
        unsigned short  ws_col;         /* columns, in characters */
        unsigned short  ws_xpixel;      /* horizontal size, pixels */
        unsigned short  ws_ypixel;      /* vertical size, pixels */
};


     TIOCGWINSZ struct winsize *ws
                 Put the window size information associated with the terminal
                 in the winsize structure pointed to by ws.  The window size
                 structure contains the number of rows and columns (and pixels
                 if appropriate) of the devices attached to the terminal.  It
                 is set by user software and is the means by which most
                 full-screen oriented programs determine the screen size.  The
                 winsize structure is defined in <sys/ioctl.h>.
#endif

int main(int argc,char *argv[]) {
 winhand(SIGWINCH);
 signal(SIGWINCH,winhand);
 while(1) {
  sleep(100);
 }
}