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C语言用代码实现读取二进制文件功能

程序员文章站 2022-03-19 20:23:33
脚本语言使用习惯了基本上不愿意去考虑C语言的文件处理功能,若不是近期看到了类似的东西又遇上了这方面的需要,或许这个简单的功能我永远也不会去碰。 其实,解决C语言的二进制未见解析很...

脚本语言使用习惯了基本上不愿意去考虑C语言的文件处理功能,若不是近期看到了类似的东西又遇上了这方面的需要,或许这个简单的功能我永远也不会去碰。

其实,解决C语言的二进制未见解析很简单,就是一个简单fopen函数的使用而已。其余的操作跟常用的脚本语言其实也没有太大的差异。代码如下:

1 #include "stdio.h"

2

3 FILE*fp;

4

5 intmain(void)

6 {

7 shortelement;

8 fp = fopen("a.out","rb");

9 while(!feof(fp))

10 {

11 element = getc(fp);

12 printf("%2x",element);

13 }

14 /*

15 Make sure that the handle of the opened file closedat this

16 point.

17 */

18 fclose(fp);

19 return 0;

20 }

21

最终,程序是把自己编译后的可执行文件当作二进制文件给读取显示出来了。编译与运行结果如下:

GreydeMac-mini:demo greyzhang$ gcc demo.c

GreydeMac-mini:demo greyzhang$ ls

a.out demo.c demo.c~

GreydeMac-mini:demo greyzhang$ ./a.out

cffaedfe 7 0 0 1 3 0 080 2 0 0 0 f 0 0 0 0 50 085 020 0 0 0 0 019 0 0 048 0 0 05f5f504147455a45524f 0 0 0 0 0 0 0 0 0 0 0 00 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00 019 0 0 0d8 1 0 05f5f54455854 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 010 0 0 0 00 0 0 0 0 0 0 0 0 0 010 0 0 0 0 0 0 7 0 0 0 5 0 0 0 5 0 0 0 0 0 0 05f5f746578740 0 0 0 0 0 0 0 0 05f5f54455854 0 0 0 0 0 0 0 0 0 0a0 e 0 0 1 0 0 09e 0 0 0 0 00 0a0 e 0 0 4 0 0 0 0 0 0 0 0 0 0 0 0 4 080 0 0 0 0 0 0 0 0 0 0 0 05f5f73747562730 0 0 0 0 0 0 0 05f5f54455854 0 0 0 0 0 0 0 0 0 03e f 0 0 1 0 0 01e 0 0 0 0 0 003e f 0 0 1 0 0 0 0 0 0 0 0 0 0 0 8 4 080 0 0 0 0 6 0 0 0 0 0 005f5f737475625f68656c706572 0 0 05f5f54455854 0 0 0 0 0 0 0 0 0 05c f 0 0 1 0 0042 0 0 0 0 0 0 05c f 0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 4 080 0 0 0 0 0 0 0 0 0 0 005f5f63737472696e67 0 0 0 0 0 0 05f5f54455854 0 0 0 0 0 0 0 0 0 09e f 0 0 1 0 00 d 0 0 0 0 0 0 09e f 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 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05f666f70656e 05f6765746305f7072696e7466 064796c645f737475625f62696e646572 0 0 0 00ffffffffGreydeMac-mini:demo greyzhang$

从上面的结果看,其实二进制软件中还是填充了很多空数据的。