How Not to Program in C++

Everyday Problems 69

Program 48: File Follies

The following program works just fine for a while, and then it refuses to rec-

ognize files that contain the magic number:

1 /************************************************

2 * scan -- Scan a directory tree for files that *

3 * begin with a magic number. *

4 ************************************************/

5 #include <iostream>

6 #include <dirent.h>

7 #include <fcntl.h>

8 #include <unistd.h>

9

10 // Linux executable magic #

11 const long int MAGIC = 0x464c457f;

12

13 /************************************************

14 * next_file -- find a list of files with *

15 * magic numbers that match the given *

16 * number ...