Stefano Garzarella stefano-garzarella

## vsock-get-cid.py
#!/usr/bin/env python3
import socket
import struct
import fcntl

with open("/dev/vsock", "rb") as fd:
    r = fcntl.ioctl(fd, socket.IOCTL_VM_SOCKETS_GET_LOCAL_CID, "    ")
    cid = struct.unpack("I", r)[0]

    print("Local CID: {}".format(cid))

## qemu_linux_pvh.md

      
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                stefano-garzarella
                / qemu_linux_pvh.md
            
            
              Last active
              August 24, 2019 13:01
            
              
                QEMU 4.0 is able to boot uncompressed Linux x86_64 kernel using the PVH entry point defined in the x86/HVM direct boot ABI https://stefano-garzarella.github.io/posts/2019-08-23-qemu-linux-kernel-pvh/
              
          
      View qemu_linux_pvh.md
  
      
    QEMU 4.0 boots uncompressed Linux x86_64 kernel
Read more

  
## git: partial and restartable clone
# shallow clone (the least possible)
git clone --depth=1

# clone others depth
for d in `seq 1 100`; do echo "depth $d"; git fetch --depth=$d; done

# clone all the rest
git fetch --unshallow

## sh_param.sh
RED='\033[0;31m'
NC='\033[0m' # No Color

function usage
{
    echo -e "usage: $0 [OPTION...]"
    echo -e ""
    echo -e "Simple description"
    echo -e ""
    echo -e " -s, --set    X.Y    set parameter"

## client.sh
#!/bin/bash
gst-launch-1.0 -v udpsrc uri=udp://239.1.1.1:5000 caps="application/x-rtp,channels=(int)2,format=(string)S16LE,media=(string)audio,payload=(int)96,clock-rate=(int)44100,encoding-name=(string)L24" ! rtpL24depay ! audioconvert ! autoaudiosink sync=false

## debug_k_printf.c
#define _dprintk(_fmt, ... )\
   do {                                                        \
       struct timeval _t0;                                     \
       do_gettimeofday(&_t0);                                  \
       printk(KERN_ERR "%03d.%06d %s():%d - " _fmt "%s\n",     \
               (int)(_t0.tv_sec % 1000), (int)_t0.tv_usec,     \
               __func__, __LINE__, __VA_ARGS__);               \
   } while (0);
#define sprintk(...) _dprintk(__VA_ARGS__, "")
#ifdef PDEBUG

## debug_c_printf.c
#define _DPRINTF(type, _fmt, ... )\
       do {                                                             \
              struct timeval _t0;                                       \
              gettimeofday(&_t0, NULL);                                 \
              fprintf(stderr, "%03d.%06d %s():%d - %s - " _fmt "%s\n",  \
                     (int)(_t0.tv_sec % 1000), (int)_t0.tv_usec,        \
                     __func__, __LINE__, type , __VA_ARGS__);           \
       } while (0);
#define EPRINTF(...) _DPRINTF("*ERROR*", __VA_ARGS__, "")
#define IPRINTF(...) _DPRINTF("INFO", __VA_ARGS__, "")

## steshell.py
import subprocess
import sys

def sh(cmd, dbg = False):
    if dbg:
        print(cmd)

    process = subprocess.Popen(cmd.split(), stdout=subprocess.PIPE)
    ret = process.communicate()[0]

## rm_all_remote_branch.sh
#!/bin/bash

#Remove all remote branches except master
REMOTE_NAME="github"
MASTER_BRANCH="master"


git branch -r | grep ${REMOTE_NAME}/ | grep -v ${MASTER_BRANCH} | grep -v HEAD  | cut -d/ -f2-10 | while read line; do git push ${REMOTE_NAME}                  ${MASTER_BRANCH} :$line; done;

## root.sh
# Make sure only root can run this script
if [[ $EUID -ne 0 ]]; then
   echo "This script must be run as root" 1>&2
   exit 1
fi
	#!/usr/bin/env python3
	import socket
	import struct
	import fcntl

	with open("/dev/vsock", "rb") as fd:
	r = fcntl.ioctl(fd, socket.IOCTL_VM_SOCKETS_GET_LOCAL_CID, " ")
	cid = struct.unpack("I", r)[0]

	print("Local CID: {}".format(cid))
	# shallow clone (the least possible)
	git clone --depth=1

	# clone others depth
	for d in `seq 1 100`; do echo "depth $d"; git fetch --depth=$d; done

	# clone all the rest
	git fetch --unshallow
	RED='\033[0;31m'
	NC='\033[0m' # No Color

	function usage
	{
	echo -e "usage: $0 [OPTION...]"
	echo -e ""
	echo -e "Simple description"
	echo -e ""
	echo -e " -s, --set X.Y set parameter"
	#!/bin/bash
	gst-launch-1.0 -v udpsrc uri=udp://239.1.1.1:5000 caps="application/x-rtp,channels=(int)2,format=(string)S16LE,media=(string)audio,payload=(int)96,clock-rate=(int)44100,encoding-name=(string)L24" ! rtpL24depay ! audioconvert ! autoaudiosink sync=false
	#define _dprintk(_fmt, ... )\
	do { \
	struct timeval _t0; \
	do_gettimeofday(&_t0); \
	printk(KERN_ERR "%03d.%06d %s():%d - " _fmt "%s\n", \
	(int)(_t0.tv_sec % 1000), (int)_t0.tv_usec, \
	__func__, __LINE__, __VA_ARGS__); \
	} while (0);
	#define sprintk(...) _dprintk(__VA_ARGS__, "")
	#ifdef PDEBUG
	#define _DPRINTF(type, _fmt, ... )\
	do { \
	struct timeval _t0; \
	gettimeofday(&_t0, NULL); \
	fprintf(stderr, "%03d.%06d %s():%d - %s - " _fmt "%s\n", \
	(int)(_t0.tv_sec % 1000), (int)_t0.tv_usec, \
	__func__, __LINE__, type , __VA_ARGS__); \
	} while (0);
	#define EPRINTF(...) _DPRINTF("ERROR", __VA_ARGS__, "")
	#define IPRINTF(...) _DPRINTF("INFO", __VA_ARGS__, "")
	import subprocess
	import sys

	def sh(cmd, dbg = False):
	if dbg:
	print(cmd)

	process = subprocess.Popen(cmd.split(), stdout=subprocess.PIPE)
	ret = process.communicate()[0]
	#!/bin/bash

	#Remove all remote branches except master
	REMOTE_NAME="github"
	MASTER_BRANCH="master"


	git branch -r \| grep ${REMOTE_NAME}/ \| grep -v ${MASTER_BRANCH} \| grep -v HEAD \| cut -d/ -f2-10 \| while read line; do git push ${REMOTE_NAME} ${MASTER_BRANCH} :$line; done;
	# Make sure only root can run this script
	if [[ $EUID -ne 0 ]]; then
	echo "This script must be run as root" 1>&2
	exit 1
	fi