dirent/bug-readdir1.c

   1 #include <dirent.h>
   2 #include <errno.h>
   3 #include <errno.h>
   4 #include <stdio.h>
   5 #include <stdlib.h>
   6 #include <unistd.h>
   7 #include <sys/types.h>
   8
   9
  10 int
  11 main (void)
  12 {
  13   DIR *dirp;
  14   struct dirent* ent;
  15
  16   /* open a dir stream */
  17   dirp = opendir ("/tmp");
  18   if (dirp == NULL)
  19     {
  20       if (errno == ENOENT)
  21         exit (0);
  22
  23       perror ("opendir");
  24       exit (1);
  25     }
  26
  27   /* close the directory file descriptor, making it invalid */
  28   if (close (dirfd (dirp)) != 0)
  29     {
  30       puts ("could not close directory file descriptor");
  31       /* This is not an error.  It is not guaranteed this is possible.  */
  32       return 0;
  33     }
  34
  35   ent = readdir (dirp);
  36
  37   return ent != NULL || errno != EBADF;
  38 }