Arti Zirk artizirk

## 0README.md

      
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                artizirk
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              Last active Jan 20, 2021
            
              
                Apple macOS Catalina under Linux KVM with GVT-g Intel GPU passthrough notes
              
          
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    Resources
macOS install itself is quite easy using OSX-KVM scripts
Virtual Intel GPU GVT-g stuff
igpu setup is quite easy by following instructions on Arch Linux wiki

https://wiki.archlinux.org/index.php/Intel_GVT-g


## gnupg_scdaemon.md

      
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                artizirk
                / gnupg_scdaemon.md
            
            
              Last active Jan 18, 2021
            
              
                OpenPGP SSH access with Yubikey and GnuPG
              
          
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    OpenPGP SSH access with Yubikey and GnuPG
Yubikey, Smart Cards, OpenSC and GnuPG are pain in the ass to get working. Those snippets here sould help alleviate pain.
Yubikey Config under Ubuntu
To reset and disable not used modes on Yubikey you need the ykman program
You can install it using those commands


## fix_maildir_mail_mtime.py
#!/usr/bin/env python3
# This script is useful for setting fallback mtime for isync/mbsync CopyArrivalDate option
# If you use notmuch then you could do something like this to fix mtime on new mail
# notmuch search --output=files tag:new | xargs -P0 -i ~/code/mailutils/fix_maildir_mtime.py {}

import email
import sys
import os
from email.utils import parsedate_tz, mktime_tz

## debug.md

      
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                artizirk
                / debug.md
            
            
              Last active Jan 14, 2021
            
              
                Debug WireGuard Linux kernel module
              
          
      View debug.md
  
    
    This uses Linux kernel dyamic debug features
https://www.kernel.org/doc/html/latest/admin-guide/dynamic-debug-howto.html
This asumes that debugfs is mounted under /sys/kernel/debug
Enable WireGuard debug
echo 'module wireguard +p' | sudo tee /sys/kernel/debug/dynamic_debug/control


## install.sh
#!/usr/bash

HOSTNAME="juust"
SERVER="http:/10.42.0.1"

echo "Stupid Arch cluster installer"

umount -R /mnt

echo "Partition disk"

## readme.txt
Working Huawei E3372h-153 SETPORT mappings


replacing A1,A2 with FF turns off need for usb_modeswitch


AT^SETPORT="A1,A2;12,1,16,A1,A2"
^GETPORTMODE: TYPE: WCDMA: huawei,PCUI:0,MDM:1,NDIS:2,CDROM:3,SD:4,

AT^SETPORT="A1,A2;1,12,16,A1,A2"

## index.html
<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <title>WebSocket demo</title>
    </head>
    <body>
        <script>
            var ws = new WebSocket("ws://127.0.0.1:8765/"),
                messages = document.createElement('ul');

## semihost.c
void __attribute__ ((noinline)) print_semihosting(const void *buf, uint32_t size)
{
    uint32_t args[3];
    args[0] = 1;
    args[1] = (uint32_t)buf;
    args[2] = size;
    asm(  "mov r0, #5\n"
          "mov r1, %0\n"
          "bkpt 0x00AB" : : "r"(args) : "r0", "r1", "memory");
}

## stm32_crc32.py
def _slow_crc(data, seed=0xFFFF_FFFF, polynomial=0x04C11DB7):
    """
    STM32 CRC that is actually CRC-32/MPEG2 but input data is read as litle-endian (not big-endian like MPEG)
    """
    crc = seed

    # Pad data if needed
    pad_len = len(data) % 4
    if pad_len > 0:
        words = array.array('I', data[:-pad_len])

## sendsms.sh
#!/bin/ash

#using: sendsms +375555555 "some text i want to send"

TELFNUMB=$1
SMSTEXT=$2
MODEM="/dev/ttyUSB1"

#reg to the network (maybe not needed)
gcom reg -d $MODEM
	#!/usr/bin/env python3
	# This script is useful for setting fallback mtime for isync/mbsync CopyArrivalDate option
	# If you use notmuch then you could do something like this to fix mtime on new mail
	# notmuch search --output=files tag:new \| xargs -P0 -i ~/code/mailutils/fix_maildir_mtime.py {}

	import email
	import sys
	import os
	from email.utils import parsedate_tz, mktime_tz
	#!/usr/bash

	HOSTNAME="juust"
	SERVER="http:/10.42.0.1"

	echo "Stupid Arch cluster installer"

	umount -R /mnt

	echo "Partition disk"
	Working Huawei E3372h-153 SETPORT mappings


	replacing A1,A2 with FF turns off need for usb_modeswitch


	AT^SETPORT="A1,A2;12,1,16,A1,A2"
	^GETPORTMODE: TYPE: WCDMA: huawei,PCUI:0,MDM:1,NDIS:2,CDROM:3,SD:4,

	AT^SETPORT="A1,A2;1,12,16,A1,A2"
	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8">
	<title>WebSocket demo</title>
	</head>
	<body>
	<script>
	var ws = new WebSocket("ws://127.0.0.1:8765/"),
	messages = document.createElement('ul');
	void __attribute__ ((noinline)) print_semihosting(const void *buf, uint32_t size)
	{
	uint32_t args[3];
	args[0] = 1;
	args[1] = (uint32_t)buf;
	args[2] = size;
	asm( "mov r0, #5\n"
	"mov r1, %0\n"
	"bkpt 0x00AB" : : "r"(args) : "r0", "r1", "memory");
	}
	def _slow_crc(data, seed=0xFFFF_FFFF, polynomial=0x04C11DB7):
	"""
	STM32 CRC that is actually CRC-32/MPEG2 but input data is read as litle-endian (not big-endian like MPEG)
	"""
	crc = seed

	# Pad data if needed
	pad_len = len(data) % 4
	if pad_len > 0:
	words = array.array('I', data[:-pad_len])
	#!/bin/ash

	#using: sendsms +375555555 "some text i want to send"

	TELFNUMB=$1
	SMSTEXT=$2
	MODEM="/dev/ttyUSB1"

	#reg to the network (maybe not needed)
	gcom reg -d $MODEM