安卓的系統備份在很多場合下可能會用到，下面這個python的指令碼，可以用來備份整個的data分割槽：將所有data分割槽的檔案和目錄打包到data.zip，並生成recovery的專用edify指令碼到update-script.sh。當然，簡單的修改下指令碼的備份路徑就可以備份system分割槽了，如果再加上幾行程式碼，就可以備份boot,recovery,uboot等等分割槽，不過這要根據不同的分割槽來寫不同的備份程式碼：

import sys

import os

from os.path import join

from os import path

import zipfile

from zipfile import ZipFile

def packdir(dir,z,dirinfo,emptydirs,linkinfo):

dirs = os.listdir(dir)

if not dirs:

emptydirs.append(dir)

else:

for d in dirs:

absdir = join(dir,d)

if not path.islink(absdir) and (path.isdir(absdir) or path.isfile(absdir)):

break

else:

emptydirs.append(dir)

for d in dirs:

absdir = join(dir,d)

st = os.lstat(absdir)

info = [st.st_uid,st.st_gid,st.st_mode]

if path.islink(absdir):

info.append(absdir)

linkdir = os.readlink(absdir)

linkinfo[linkdir] = info

elif path.isdir(absdir):

dirinfo[absdir] = info

packdir(absdir,z,dirinfo,emptydirs,linkinfo)

elif path.isfile(absdir):

dirinfo[absdir] = info

os.utime(absdir,(1403408099,1403408099))

z.write(absdir)

else:

print "file type unknow %s"%(absdir,)

zi = ZipFile("data.zip","w",zipfile.ZIP_DEFLATED)

dirinfo = {}

emptydirs = []

linkinfo = {}

packdir("/data",zi,dirinfo,emptydirs,linkinfo)

f = open("update-script.sh","wb");

f.write("ifelse(is_mounted("/data"),unmount("/data"),0);\n")

f.write("format("ext4", "EMMC", "/dev/block/data", "0", "/data");\n")

f.write("mount("ext4", "EMMC", "/dev/block/data", "/data");\n")

f.write("package_extract_dir("data", "/data");\n")

mkdir_cmd = "run_program("/sbin/busybox","mkdir","-p",""

mkdir_cmd += "","".join(emptydirs)

mkdir_cmd += "");\n"

f.write(mkdir_cmd)

for key in dirinfo.keys():

info = dirinfo[key]

info = list(info)

info.append(key)

info = tuple(info)

set_perm = "set_perm(%d, %d, %d, "%s");\n"%info

f.write(set_perm)

for key in linkinfo:

info = linkinfo[key]

info = tuple(info)

symlink = "symlink("%s", "%s");\n"%(key,info[3])

set_perm = "run_program("/sbin/busybox","chown","-h","install:install","%s");\n"%(info[3],)

f.write(symlink)

f.write(set_perm)

f.write("unmount("/data");")

f.close()

update_script="update-script.sh"

os.utime(update_script,(1403408099,1403408099))

zi.write(update_script)

zi.close()