blob: caf6aecc8da65510b8a10119fc6c76e97553a73f
| 1 | #include <stdio.h> |
| 2 | #include <string.h> |
| 3 | |
| 4 | //#include <sys/types.h> |
| 5 | #include <unistd.h> |
| 6 | #include <errno.h> |
| 7 | #include <fcntl.h> |
| 8 | |
| 9 | //#define O_RDWR 00000000 |
| 10 | //#define __u64 unsigned long long |
| 11 | |
| 12 | |
| 13 | #define BUFFERSIZE 16 |
| 14 | |
| 15 | |
| 16 | /***************************************** |
| 17 | * |
| 18 | * /bin/test /media/usba1/ |
| 19 | * |
| 20 | *****************************************/ |
| 21 | |
| 22 | int main(int argc,char* argv[]) |
| 23 | { |
| 24 | char *filestr = argv[1]; |
| 25 | int fd ; |
| 26 | __s64 start= 0; |
| 27 | __s32 total=0; |
| 28 | __u32 start_h= 0;//, total_h=0; |
| 29 | __u32 start_l= 0;//, total_l=0; |
| 30 | __u8 buffer[BUFFERSIZE]; |
| 31 | |
| 32 | if(argc < 4) |
| 33 | { |
| 34 | printf("< 4 args\n"); |
| 35 | printf("format:filestr start_h(0x):start_l size(0x)\n"); |
| 36 | return -1; |
| 37 | } |
| 38 | |
| 39 | fd =open(filestr,O_RDWR|O_LARGEFILE,0); |
| 40 | if(fd < 0) |
| 41 | { |
| 42 | printf("open %s fail\n",filestr); |
| 43 | return -1; |
| 44 | } |
| 45 | |
| 46 | sscanf(argv[2],"0x%x:%x",&start_h,&start_l); |
| 47 | sscanf(argv[3],"0x%x",&total); |
| 48 | |
| 49 | start=((__s64)start_h<<32)+start_l; |
| 50 | if(start < 0 || total< 0 ) |
| 51 | { |
| 52 | printf("start or total <0 \n"); |
| 53 | return -1; |
| 54 | } |
| 55 | |
| 56 | if(start!=lseek64(fd,start,SEEK_SET)) |
| 57 | { |
| 58 | printf("lseek64 fail \n"); |
| 59 | return -1; |
| 60 | } |
| 61 | |
| 62 | printf("read start from 0x%x:%x\n",start_h ,start_l ); |
| 63 | printf("total= 0x%x bytes\n",total ); |
| 64 | |
| 65 | for ( ;total>0 ; total-=BUFFERSIZE) |
| 66 | { |
| 67 | int i; |
| 68 | memset(buffer,0,BUFFERSIZE); |
| 69 | if(read(fd,buffer,BUFFERSIZE)<0) |
| 70 | { |
| 71 | printf("read at 0x%x%x fail\n", (__u32)(start>>32),(__u32)(start&0xffffffff)); |
| 72 | printf("errno=%d\n",errno); |
| 73 | break; |
| 74 | } |
| 75 | |
| 76 | for(i=0;i<BUFFERSIZE;i++) |
| 77 | { |
| 78 | printf("%02x ",buffer[i]); |
| 79 | } |
| 80 | printf("\n"); |
| 81 | |
| 82 | ////////////////add you code here//////////////////////////// |
| 83 | |
| 84 | } |
| 85 | close(fd); |
| 86 | return 0; |
| 87 | } |
| 88 | |
| 89 |