Rong Tao Rtoax

ELF

ELF Header

The first portion of any ELF file is the ELF header. This generally provides offsets to other headers (program headers and section headers) within an ELF.

typedef struct {
  unsigned char e_ident[EI_NIDENT];
 uint16_t e_type;

ELF

ELF Header

The first portion of any ELF file is the ELF header. This generally provides offsets to other headers (program headers and section headers) within an ELF.

typedef struct {
  unsigned char e_ident[EI_NIDENT];
 uint16_t e_type;

	#include <stdio.h>
	#include <string.h>
	#include <sys/types.h>
	#include <sys/socket.h>
	#include <net/if.h>
	#include <net/ethernet.h>
	#include <netinet/in.h>
	#include <netinet/ip.h>
	#include <arpa/inet.h>
	#include <netpacket/packet.h>

	# How to sign your custom RPM package with GPG key

	# Step: 1
	# Generate gpg key pair (public key and private key)
	#
	# You will be prompted with a series of questions about encryption.
	# Simply select the default values presented. You will also be asked
	# to create a Real Name, Email Address and Comment (comment optional).
	#
	# If you get the following response:

	#!/bin/bash

	REPOSYNC_SCRIPTS_LIST=$(find -name reposync.sh)

	for script in $REPOSYNC_SCRIPTS_LIST
	do
	cd $(dirname $script)
	sh $(basename $script)
	cd -
	done

	%{
	#include <stdio.h>
	#include "parser.h"
	%}

	%%

	[ \r\n\t]* { continue; /* Skip blanks. */ }
	[0-9]+ { sscanf(yytext, "%d", &yylval->value);
	return TOKEN_NUMBER; }

	# Create a folder for our new root structure
	$ export centos_root='/centos_image/rootfs'
	$ mkdir -p $centos_root
	# initialize rpm database
	$ rpm --root $centos_root --initdb
	# download and install the centos-release package, it contains our repository sources
	$ yum reinstall --downloadonly --downloaddir . centos-release
	$ rpm --root $centos_root -ivh centos-release*.rpm
	$ rpm --root $centos_root --import $centos_root/etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
	# install yum without docs and install only the english language files during the process

	#include <errno.h>
	#include <stdint.h>
	#include <stdio.h>
	#include <stdlib.h>
	#include <string.h>
	#include <sys/ptrace.h>
	#include <sys/types.h>
	#include <unistd.h>

	struct elf {