android dump 分区

有的时候需要dump分区的raw data(没有文件系统)进行分析

/* *   out put  raw partition image */#include <stdio.h>#include <string.h>#include <errno.h>#include <sys/types.h>#include <sys/stat.h>#include <fcntl.h>#include <unistd.h>#define PRELOADER"/dev/preloader"#define BOOTLOADER"/dev/uboot"#define RECOVERYIMG"/dev/recovery"#define BUFFERSIZE   (1*1024*1024)static char buff[BUFFERSIZE];int dumpPartition(char * name, int size){int  i = 0,ret =0;       int  fdin, fdout;char * inputname[256]={0x00};char * outputname[256]={0x00};sprintf(inputname,"/dev/%s",name);sprintf(outputname,"/data/%s.dump",name);printf("inputname is %s , and outputname is %s \n",inputname,outputname);       fdin = open(inputname, O_RDONLY);       if ((fdin = open (inputname,O_RDONLY)) < 0) {             printf("create %s  failed\n",inputname);             exit(1);       }       if ((fdout = open (outputname, O_RDWR | O_CREAT | O_TRUNC, 0666)) < 0) {             printf("create %s  failed \n",outputname);             exit(1);       }         printf("size is  %d \n",size);for(i=0;i<size;i++){    ret=read(fdin,buff,BUFFERSIZE);    printf("read %d from %s \n",ret,inputname);    ret=write(fdout,buff,BUFFERSIZE);    printf("write %d to %s \n",ret,outputname);}       close(fdin);close(fdout);return 0;}void showhelp(){     printf("./rawdump  part_name  size_m\n");     printf("eg  :  ./rawdump  uboot  1 \n");     printf("please try again \n");     return ;}int main(int argc, char *argv[]){if(argc!=3){    showhelp();    exit(1);}char * name = argv[1];int size = atoi(argv[2]);dumpPartition(name, size);return 0;}

具体用法，先编译之，adb push 到 android设备

./rawdump 分区名需要导出的分区大小

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