八升級程序的執(zhí)行過程

1、）1. *Copyright(C)）1. *Copyright(C)2009TheAndroidOpenSource*LicensedundertheApacheLicense,2.0(the*youmaynotusethisfileexceptincompliancewiththe*YoumayobtainacopyoftheLicense*Unlessrequiredbyapplicablelaworagreedtoinwriting,*distributedundertheLicenseisdistributedonanASIS*WITHOUTWARRANTIESORCONDITIONS

2、OFANYKIND,eitherexpressorimp *SeetheLicenseforthespecificernings * ionsunderthe15. */ 17.#include-升級程序 update_binary 的執(zhí)行過一、update_binary 的執(zhí)行過程分上一篇幅中的子進程所執(zhí)行的程序 binary 實際上就是 update.zipupdate-binary。 在上文中也 ，Recovery服務在做這一update-binary 拷貝到內存文件系統(tǒng)中的 cppviewAndroid 系統(tǒng)Recovery 工作原理之使用update.zip 升級過程分（18.#in

3、clude19.#include21.#include22.#include23.#include24.#include26./Generatedbythemakefile,thisfunctiondefines27./s()function,which18.#include19.#include21.#include22.#include23.#include24.#include26./Generatedbythemakefile,thisfunctiondefines27./s()function,whichcallsall28./registrationfunctionsforpeci

4、fic29.#include31./hexpecttofindtheedifyscriptto32./(NoteitsupdateR-script,nottheolderupdate-33.#defineSCRIPT_NAME/argc,char*argv)/Variousthingsloginformationtostdoutorstderrmoreor/atrandom. Thelogfilemakesmoresenseifbuffering/turnedoffsothingsherightsetbuf(stdout,setbuf(stderr,if(argc!=4) f(stderr,u

5、nexpectednumberofarguments(%d)n,;returnchar*= if 0 !=1& 0 !=2& 0!= 1!=0)/ support1,2, or f(stderr,wrongupdaterbinaryAPI;expected1,2,or; gotreturn/Setup pefor dsbacktothe1!=0)/ support1,2, or f(stderr,wrongupdaterbinaryAPI;expected1,2,or; gotreturn/Setup pefor dsbacktotheparents.fd = FILE*cmd_pipe=fd

6、open(fd,/Extractthescriptfromthechar*package_data=ZipArchiveerr=mzOpenZipArchive(package_data,if(err!=0) f(stderr,failedtoopenpackage%s:package_data,returnconstZipEntry*script_entry=mzFindZipEntry(&za,if(script_entry=NULL)f(stderr,failedtofind%sin%sn,SCRIPT_NAME,returnchar*script=malloc(script_entry

7、-if(!mzReadZipEntry(&za,script_entry,script,script_entry-pLen)f(stderr,failedtoreadscriptfromreturnpLen=/Configureedifyschar*script=malloc(script_entry-if(!mzReadZipEntry(&za,script_entry,script,script_entry-pLen)f(stderr,failedtoreadscriptfromreturnpLen=/Configureedifys/ParsetheExpr*error_count=err

8、or=yyparse(&root,if(error!=0|error_count0)f(stderr,%dparseerrorsn,return/EvaluatetheparsedUpdaterInfoupdater_info.cmd_pipe=updater_info.package_zip= Se s= s= s= char*= e,if(result =NULL)if e.errmsg=NULL)f(stderr,scriptaborted(noerror;f(cmd_pipe,scriptaborted(noerrorelse f(stderr,scriptaborted:%sn,s=

9、 s= char*= e,if(result =NULL)if e.errmsg=NULL)f(stderr,scriptaborted(noerror;f(cmd_pipe,scriptaborted(noerrorelse f(stderr,scriptaborted:%sn,char*line= e.errmsg,while(line)f(cmd_pipe,%sn,line=strtok(NULL,f(cmd_pipe,returnelse f(stderr,scriptresultwas%sn,if(updater_info.package_zip)returnupdaterupdat

10、erbinaryAPI所支持的1，2，3 這三個。UI 顯示。 Configure edifys functions：RegisterBuiltins()： 程序中控制流程的語句，如 mount、format、set_progress、set_perm 等等。FinishRegistration()：結束 Parsethescriptyy*庫函數(shù) 后的內容存放到一個Expr類型的 類中。主要函數(shù)是yy_scan_string()和 函數(shù)，而這些callback 函數(shù)又會去調用Evaluate 去令就是updater-script的下一篇幅將介紹updater-中的語法以及這在具體升級中的執(zhí)行流程到install_package 函數(shù)令就是updater-script的下一篇幅將介紹updater-中的語法以及這在具體升級中的