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@jonte
jonte / tmp105.md
Last active April 6, 2025 15:26
Emulating a tmp105 temperature sensor using QEMU and Linux

This will configure QEMU to expose a tmp105 temperature sensor on the i2c-0 bus on x86_64. The temterature sensor can have its temperature set from the host OS, and the temperature can be read from the Linux client OS using the lm75 kernel module.

Building QEMU

For convenience, we will be emulating an x86 system. The x86 configuations which QEMU ships with do not contain the tmp105 sensor we will be using, so first we need to enable it.

Assuming you have the qemu sources in the qemu directory:

# cd qemu

echo "CONFIG_TMP105=y" >> default-configs/i386-softmmu.mak

@xenogenesi
xenogenesi / Makefile
Last active February 28, 2025 18:53
create self signed certificates
DOMAIN ?= mydomain.com
COUNTRY := IT
STATE := IT
COMPANY := Evil Corp.
# credits to: https://gist.github.com/fntlnz/cf14feb5a46b2eda428e000157447309
# usage:
@mmozeiko
mmozeiko / test.c
Last active April 28, 2024 20:52
gtk widget from x11 window
// gcc test.c `pkg-config --cflags --libs gtk+-3.0 gdk-3.0` -lX11 && ./a.out
#include <X11/Xlib.h>
#include <unistd.h>
#include <stdio.h>
#include <gtk/gtk.h>
#include <gdk/gdkx.h>
static void my_gtk_realize(GtkWidget* widget, gpointer user)
@fntlnz
fntlnz / self-signed-certificate-with-custom-ca.md
Last active April 23, 2025 14:10
Self Signed Certificate with Custom Root CA

Create Root CA (Done once)

Create Root Key

Attention: this is the key used to sign the certificate requests, anyone holding this can sign certificates on your behalf. So keep it in a safe place!

openssl genrsa -des3 -out rootCA.key 4096
@slava-konashkov
slava-konashkov / Calc.java
Last active November 9, 2022 06:29
Java console calculator
package calc;
import java.io.*;
import java.util.*;
public class Calc {
public static void main(String[] args) throws Exception {
BufferedReader d = new BufferedReader(new InputStreamReader(System.in));
String sIn;