dcai

#!/usr/bin/env python

import sys, os, time, atexit
from signal import SIGTERM

class Daemon:
    """
    A generic daemon class.

    Usage: subclass the Daemon class and override the run() method

yegle

This is a brief introduction about how Linux kernel handles the send system call.

This study is based on kernel version 3.7.2, which is the latest stable kernel when writing this study.

How system call is defined

In the latest kernel, the system call is defined using the SYSCALL_DEFINEx macro, in which x is the number of arguments. For example, in order to find the definition of asmlinkage long sys_sendto(int, void __user *, size_t, unsigned, struct sockaddr __user *, int);, you need to grep for SYSCALL_DEFINE6 because it has 6 arguments.

The definition of the system call send can be found at net/socket.c.

willurd

Each of these commands will run an ad hoc http static server in your current (or specified) directory, available at http://localhost:8000. Use this power wisely.

Discussion on reddit.

Python 2.x

$ python -m SimpleHTTPServer 8000

zachriggle

RARVM reversible/patchme
 
Modified 'unrar' source to dump context and disassembly.
 
Wrote two separate solvers since the challenge was broken.

To build the disassembler/debugger:

- unzip unrar-src-disassembler.zip -d unrar
- cd unrar

Liryna

You might want to read this to get an introduction to armel vs armhf.

If the below is too much, you can try Ubuntu-ARMv7-Qemu but note it contains non-free blobs.

Running ARM programs under linux (without starting QEMU VM!)

First, cross-compile user programs with GCC-ARM toolchain. Then install qemu-arm-static so that you can run ARM executables directly on linux

laispace

git config --global https.proxy http://127.0.0.1:1080

git config --global https.proxy https://127.0.0.1:1080

git config --global --unset http.proxy

git config --global --unset https.proxy


npm config delete proxy

thejh

#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <signal.h>
#include <errno.h>
#include <fcntl.h>
#include <stddef.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <sys/stat.h>

xcatliu

2023.8.28

据多名网友回复，此方法已失效。

最新解决办法请参考此贴：[v2ex: 请问 github 的两步验证（two-factor authentication）大家是怎么做的？](https://www.v2ex.com/t/967533)

https://www.v2ex.com/t/967533

---

CMCDragonkai

Understanding the Memory Layout of Linux Executables

Required tools for playing around with memory:

• hexdump
• objdump
• readelf
• xxd
• gcore

icewall

def getGUID(ea):
    data1 = idc.GetManyBytes(ea,4)
    data1 = struct.unpack("<I",data1)[0]
    #print "%08x" % (data1)

    ea += 4
    data2 = idc.GetManyBytes(ea,2)
    data2 = struct.unpack("<H",data2)[0]
    #print "%04x" % (data2)