#include <stdio.h>
#include <stdlib.h>

#include <X11/Xlib.h>
#include <NVCtrl/NVCtrlLib.h>

int main(int argc, char **argv)
{
    int res;
    int core_temp;
    Display *disp;

    disp = XOpenDisplay(":0.0");
    res = XNVCTRLQueryAttribute(disp, 0, 0, NV_CTRL_GPU_CORE_TEMPERATURE, &core_temp);
    XCloseDisplay(disp);

    if(!res) {
        fprintf(stderr, "Could not query NV_CTRL_GPU_CORE_TEMPERATURE attribute!\n");
        return 1;
    }

    printf("Core temperature is %d\n", core_temp);

    return 0;
}