/** =====================================================================================** Filename: unpack.c** Description: 僅作為代碼分享，轉載請注明作者
*　　　　　　　　　　（相對于把整大塊文件讀入內存，此程序運行時對系統開銷比較小的特點）；** Version: 1.0* Created: 2013年03月28日 22時34分52秒* Revision: none* Compiler: gcc** Author: linkscue (scue), * Organization: ** =====================================================================================*/#include <stdlib.h> #include <stdio.h> #include <strings.h> #define u8 unsigned char #define u32 unsigned int #define u16 unsigned short #define BUFFER_SIZE 4/* * u32 magic* u32 paket_size* u32 flag=0x1* u8 Hardware[8]* u32 Filetype* u32 data_size* u8 date[16]* u8 time[16]* u8 filename[32]* u8 other[paket_size-92]* */int realStrlen(char *string){int i=0;char ch=NULL;while ( (ch = *(string + i)) != '\xFF' ) {i++;}return i; } void hello(){printf("\n");printf("Welcome to use linkscue unpack huawei official rom tool!\n"); } int main ( int argc, char *argv[] ) {hello();if (argc == 1) {printf("\n");printf("usage: %s unpack.app\n", argv[0]);exit(0);}char *file;FILE *fp,*fd;u32 tmp;u32 magic=0xa55aaa55;u32 paket_size=0;u32 flag=1;u8 hwid[8]="";u32 filetype=0;u32 data_size=0;u8 date[16]="";u8 time[16]="";u8 filename[32]="";int other_size=0;int number=1;char basename[32]="";char basehwid[8]="";int fp_start=0;int fp_local=0;int i=0,count=0,counts=0;int end_point=0;file=argv[1];if ( (fp=fopen(file,"rb")) == NULL) {printf("open file failure!\n",file);exit(1);}printf("\n");while (!feof(fp)) {fscanf(fp, "%4c", &tmp);if (tmp == magic) {fp_start=(ftell(fp)-4);fscanf(fp, "%4c",&paket_size);fscanf(fp, "%4c",&flag);fscanf(fp, "%8c",&hwid);fscanf(fp, "%4c",&filetype);fscanf(fp, "%4c",&data_size);fscanf(fp, "%16c",&date);fscanf(fp, "%16c",&time);fscanf(fp, "%32c",&filename);other_size=( paket_size - 92 );fseek(fp, other_size, SEEK_CUR);if ( strcmp(filename,"INPUT") == 0 ) {sprintf(basename, "output_%02d.img", number);strncpy(filename, basename, sizeof(filename));number++;} // if ( (int)paket_size <= 0 || (int)data_size <= 0) { // continue; // } strncpy(basehwid, hwid , realStrlen(hwid));printf("At: 0x%08x hw: %s size: %-10d time: %s_%s --> %s\n", fp_start, basehwid, data_size, date, time, filename);if ((fd=fopen(filename,"wb"))==NULL) {printf("open %s to write data failure!\n", filename);fseek(fp, 88, SEEK_CUR);continue;}u8 buffer[BUFFER_SIZE];counts = 0;while ( counts < data_size ){if (feof(fp)) { /* if the file is end, break! */break;}count = fread(buffer, 1, BUFFER_SIZE, fp);fwrite(buffer, 1 , BUFFER_SIZE, fd);counts+=count;} // printf("paket size is 0x%08x, count is %d, data start at 0x%08x, this time end at 0x%08x\n", paket_size,counts, (paket_size+fp_start), ftell(fp)); fclose(fd);fseek(fp, ( fp_start + 92 ) , SEEK_SET);}} // printf("Unpack %s ok!\n", file); fclose(fp);return EXIT_SUCCESS; }

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