#!/bin/sh
gcc -Wall -o getmodeline.o -c -x c - <<EOF
#include <stdlib.h>
#include <stdio.h>
#include <X11/Xlib.h>      /* declares XOpenDisplay */
#include <X11/Intrinsic.h>
#include <X11/Shell.h>
#include <X11/StringDefs.h>
#include <X11/Xatom.h>
#include <X11/Xmu/StdSel.h>
#include <X11/Xmd.h>
#include <X11/extensions/xf86vmode.h>

int main()
{
    XF86VidModeModeLine l;
    int dotclock;
    Display* displ;

    if (!(displ = XOpenDisplay(":0.0")))
    {
	fprintf (stderr, "unable to open display\n");
	return(1);
    }
    if (!XF86VidModeGetModeLine (displ, DefaultScreen(displ),
				 &dotclock, &l))
    {
      fprintf(stderr, "Couldn't get mode line\n");
      return(1);
    }
    printf ("%d  %d %d %d %d  %d %d %d %d\n",
	    dotclock, l.hdisplay, l.hsyncstart, l.hsyncend, l.htotal,
	    l.vdisplay, l.vsyncstart, l.vsyncend, l.vtotal);
    return(0);
}
EOF

gcc -o getmodeline getmodeline.o -lX11 -lXxf86vm -lXext -L/usr/X11R6/lib
rm -f getmodeline.o

#http://mail.gnome.org/archives/gtk-list/2001-September/msg00265.html

#Bool XF86VidModeGetModeLine(
#			    Display *display,
#			    int screen,
#			    int *dotclock_return,
#			    XF86VidModeModeLine *modeline);