小知识，大挑战！本文正在参与“程序员必备小知识”创作活动。
引言
在ASO项目中常常基于Rrocketbootstrap封装Message工具类进行进程间的消息通信，为了避免每次部署都从bigBoss 源更新。本文就来讲讲如何去掉对rocketbootstrap的Depends依赖，达到deb自带rocketbootstrapd的目的。
本文侧重于操作，更多原理请看掘金的这篇文章 将功能独立的tweak 合并为一个deb 包
I、去掉对rocketbootstrap的依赖
deb包的执行脚本
debian/preinst 安装前执行脚本
debian/postinst 安装后执行脚本
debian/prerm 卸载前执行脚本
debian/postrm 卸载后执行脚本
复制代码1.1 分析rocketbootstrap的postinst、prerm
#!/bin/sh
if [ "$1" = "upgrade" ] || [ "$1" = "install" ];then
# 需要执行的脚本
fi
复制代码- 安装rocketbootstrapd后执行脚本
#!/bin/sh
launchctl load /Library/LaunchDaemons/com.rpetrich.rocketbootstrapd.plist || true
launchctl stop com.apple.ReportCrash.SimulateCrash || true
mv /System/Library/LaunchDaemons{BAK,}/com.apple.ReportCrash.SimulateCrash.plist 2> /dev/null || true
launchctl load /System/Library/LaunchDaemons/com.apple.ReportCrash.SimulateCrash.plist 2> /dev/null || true
复制代码- 卸载rocketbootstrapd的时候执行的脚本：停止 RocketBootstrap
launchctl unload /Library/LaunchDaemons/com.rpetrich.rocketbootstrapd.plist || true
launchctl stop com.apple.ReportCrash.SimulateCrash || true
复制代码1.2 方案
- 将以下内容mv copy 一份到自己的deb 包对应的位置
RocketBootstrap/layout/DEBIAN/prerm
RocketBootstrap/layout/Library/LaunchDaemons/ /Library/LaunchDaemons/ /layout/DEBIAN/prerm
- 整体操作的文件清单
knPackage/Library/LaunchDaemons/com.rpetrich.rocketbootstrapd.plist
knPackage/Library/MobileSubstrate/DynamicLibraries/RocketBootstrap.dylib
knPackage/Library/MobileSubstrate/DynamicLibraries/RocketBootstrap.plist
knPackage/usr/bin/reloadRocket
knPackage/usr/include/
knPackage/usr/lib/
knPackage/usr/libexec/
复制代码下载地址：download.csdn.net/download/u0… private 仓库github.com/iosdeb/setu…
Layout/DEBIAN/postinst
#!/bin/sh
# 0、 修改 rocketbootstrapd 守护进程的ProgramArguments参数 <string>/usr/libexec/rocketd</string>
chmod +s /usr/libexec/_rocketd_reenable 2>/dev/null
chown root:wheel /usr/libexec/_rocketd_reenable 2>/dev/null
# 1、rocketbootstrapd 相关的安装之后处理
# 加载rocketbootstrapd
chown root:wheel /Library/LaunchDaemons/com.rpetrich.rocketbootstrapd.plist 2>/dev/null
launchctl load /Library/LaunchDaemons/com.rpetrich.rocketbootstrapd.plist || true
# 2、关闭RocketBootstrap的目标进程ReportCrash ，因为tweak 是在进行开启的过程进行inject的
launchctl stop com.apple.ReportCrash.SimulateCrash || true
killall -9 ReportCrash 2>/dev/null || true
# 3、load ReportCrash
mv /System/Library/LaunchDaemons{BAK,}/com.apple.ReportCrash.SimulateCrash.plist 2>/dev/null || true
launchctl load /System/Library/LaunchDaemons/com.apple.ReportCrash.SimulateCrash.plist || true
复制代码Layout/DEBIAN/prerm
#!/bin/sh
launchctl unload /Library/LaunchDaemons/com.rpetrich.rocketbootstrapd.plist || true
launchctl stop com.apple.ReportCrash.SimulateCrash || true
复制代码/Layout/DEBIAN/control
Package: https://kunnan.blog.csdn.net/
Depends: mobilesubstrate (>= 0.9.5000), firmware (>= 3.0)
Name: RocketBootstrap
Version: 1.0.2
Architecture: iphoneos-arm
Description: mach lookup support library for iOS 7
Depiction: kunnan.blog.csdn.net
Homepage: kunnan.blog.csdn.net
Maintainer: kunnan.blog.csdn.net
Author: kunnan.blog.csdn.net
Sponsor: kunnan.blog.csdn.net
Section: Tweaks
dev: kunnan.blog.csdn.net
Tag: purpose::extension, role::developer
复制代码II、常见问题和分析deb方法
2.1 dpkg -r com.rpetrich.rocketbootstrap 失败
iPhone:/var/mobile/Media root# dpkg -r com.rpetrich.rocketbootstrap
dpkg: dependency problems prevent removal of com.rpetrich.rocketbootstrap:
applist depends on com.rpetrich.rocketbootstrap (>= 1.0.3) ø firmware (<< 7.0); however:
Package com.rpetrich.rocketbootstrap is to be removed.
Version of firmware on system is 10.1.1.
dpkg: error processing package com.rpetrich.rocketbootstrap (--remove):
dependency problems - not removing
Errors were encountered while processing:
com.rpetrich.rocketbootstrap
复制代码原因： rocketbootstrap还被依赖中，例如applist 解决方案： 卸载app list 即可 推荐使用 dpkg -P进行卸载deb软件
因为dpkg --remove只是删除安装的文件，但不删除配置文件。
而dpkg --purge则安装文件和配置文件都删除。
2.2分析rocketbootstrap 安装过程
一个简单的方式研究你刚刚安装一个tweak或者deb 包之后，系统最近访问的文件，以rocketbootstrap 为例子。
wl24:~ root# find / -amin -1
/Library/LaunchDaemons/com.rpetrich.rocketbootstrapd.plist
/dev/oslog_stream
/dev/ptmx
/dev/bpf0
/dev/urandom
/dev/cu.debug
/dev/ttys000
//usr/include/rocketbootstrap.h
/usr/include/rocketbootstrap_dynamic.h
/usr/lib/librocketbootstrap.dylib
/usr/libexec/_rocketd_reenable
/usr/libexec/rocketd
复制代码从上面列表中刷选出我们要的文件
/private/var/lib/dpkg/info/com.rpetrich.rocketbootstrap.list
/private/var/lib/dpkg/info/com.rpetrich.rocketbootstrap.md5sums
/private/var/lib/dpkg/info/com.rpetrich.rocketbootstrap.postinst
/private/var/lib/dpkg/info/com.rpetrich.rocketbootstrap.prerm
复制代码LIBRARY_NAME = librocketbootstrap
librocketbootstrap_FILES = Tweak.x Shims.x
librocketbootstrap_LIBRARIES = substrate
librocketbootstrap_FRAMEWORKS = Foundation
TOOL_NAME = rocketd
rocketd_FILES = rocketd.c
rocketd_FRAMEWORKS = CoreFoundation
rocketd_INSTALL_PATH = /usr/libexec
rocketd_IPHONE_ARCHS = armv6 arm64
ADDITIONAL_CFLAGS = -std=c99
IPHONE_ARCHS = armv6 armv7 armv7s arm64
SDKVERSION_armv6 = 5.1
INCLUDE_SDKVERSION_armv6 = 7.0
TARGET_IPHONEOS_DEPLOYMENT_VERSION = 4.0
TARGET_IPHONEOS_DEPLOYMENT_VERSION_armv6 = 3.0
THEOS_PLATFORM_SDK_ROOT_armv6 = /Applications/Xcode_Legacy.app/Contents/Developer
include framework/makefiles/common.mk
include framework/makefiles/library.mk
include framework/makefiles/tool.mk
stage::
mkdir -p "$(THEOS_STAGING_DIR)/usr/include"
cp -a rocketbootstrap.h rocketbootstrap_dynamic.h "$(THEOS_STAGING_DIR)/usr/include"
plutil -convert binary1 "$(THEOS_STAGING_DIR)/Library/MobileSubstrate/DynamicLibraries/RocketBootstrap.plist"
复制代码- 分析Makefile
stage::
mkdir -p "$(THEOS_STAGING_DIR)/usr/include"
<!-- Same as -pPR options. Preserves structure and attributes of files but not directory structure -->
cp -a rocketbootstrap.h rocketbootstrap_dynamic.h "$(THEOS_STAGING_DIR)/usr/include"
plutil -convert binary1 "$(THEOS_STAGING_DIR)/Library/MobileSubstrate/DynamicLibraries/RocketBootstrap.plist"
<!-- 因此 你看到安装之后的RocketBootstrap.plist 是编码后的二进制格式 -->
此时你要Xcode打开它的话，会自动解析
<!--利用plutil 进行 XML 格式化 -->
把二进制文件转换为XML格式:plutil -c xml1 com.apple.SpringBoard.plist
<!-- 把XML格式的文件转换为二进制 -->
plutil -c binary1 com.apple.SpringBoard.plist
复制代码see laso
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作者：公众号iOS逆向
链接：juejin.cn/post/701769… 来源：稀土掘金
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