dirent/tst-seekdir.c

   1 #include <stdio.h>
   2 #include <dirent.h>
   3 #include <stdlib.h>
   4
   5 int
   6 main (int argc, char *argv[])
   7 {
   8
   9   DIR * dirp;
  10   long int save3 = 0;
  11   int i = 0;
  12   struct dirent *dp;
  13
  14   dirp = opendir(".");
  15   for (dp = readdir(dirp); dp != NULL; dp = readdir(dirp))
  16     {
  17       /* save position 3 (after fourth entry) */
  18       if (i++ == 3)
  19         save3 = telldir(dirp);
  20
  21       printf("%s\n", dp->d_name);
  22
  23       /* stop at 400 (just to make sure dirp->__offset and dirp->__size are
  24          scrambled */
  25       if (i == 400)
  26         break;
  27     }
  28
  29   printf("going back past 4-th entry...\n");
  30
  31   /* go back to saved entry */
  32   seekdir (dirp, save3);
  33
  34
  35   /* print remaining files (3-last) */
  36   for (dp = readdir(dirp); dp != NULL; dp = readdir(dirp))
  37     printf("%s\n", dp->d_name);
  38
  39
  40   closedir (dirp);
  41   exit(0);
  42 }