打印字节内容的16进制 

 1 #include    <stdlib.h>
 2 #include    <stdio.h>
 3 #include    <sys/stat.h>
 4 #include    <sys/types.h>
 5 #include    <unistd.h>
 6 #include    <fcntl.h>
 7 /* 
 8  * ===  FUNCTION  ======================================================================
 9  *         Name:  main
10  *  Description:  
11  * =====================================================================================
12  */
13     int 
14 main ( int argc, char *argv[] )
15 {
16     int fd; 
17     unsigned char mac_add[6];
18     if((fd = open(argv[1],O_RDWR)) == -1){
19         printf("open error\n");
20         exit(1);
21     }   
22 
23     if(lseek(fd,40,SEEK_SET) != 40){
24         printf("lseek error\n");
25         exit(1);
26     }   
27         
28     if(read(fd,mac_add,6) != 6){ 
29         printf("read error\n");
30         exit(1);
31     }   
32     int i;
33     for ( i = 0; i < 6 ; i++ ){
34         printf("%x",mac_add[i]);
35     }
36     printf("\n");
37     close(fd);
38     return EXIT_SUCCESS;
39 }               /* ----------  end of function main  ---------- */

 

posted @ 2013-04-24 21:21  sunsweet  阅读(322)  评论(0)    收藏  举报