1  #include <errno.h>
       2  #include <ftw.h>
       3  #include <stdio.h>
       4  #include <stdlib.h>
       5  #include <string.h>
       6  #include <unistd.h>
       7  
       8  static int cb_called;
       9  
      10  static int
      11  cb (const char *fname, const struct stat *st, int flag)
      12  {
      13    printf ("%s %d\n", fname, flag);
      14    cb_called = 1;
      15    return 0;
      16  }
      17  
      18  int
      19  main (void)
      20  {
      21    char tmp[] = "/tmp/ftwXXXXXX";
      22    char tmp2[] = "/tmp/ftwXXXXXX/ftwXXXXXX";
      23    char *dname;
      24    char *dname2;
      25    int r;
      26    int e;
      27  
      28    if (getuid () == 0)
      29      {
      30        puts ("this test needs to be run by ordinary user");
      31        exit (0);
      32      }
      33  
      34    dname = mkdtemp (tmp);
      35    if (dname == NULL)
      36      {
      37        printf ("mkdtemp: %m\n");
      38        exit (1);
      39      }
      40  
      41    memcpy (tmp2, tmp, strlen (tmp));
      42    dname2 = mkdtemp (tmp2);
      43    if (dname2 == NULL)
      44      {
      45        printf ("mkdtemp: %m\n");
      46        rmdir (dname);
      47        exit (1);
      48      }
      49  
      50    if (chmod (dname, S_IWUSR|S_IWGRP|S_IWOTH) != 0)
      51      {
      52        printf ("chmod: %m\n");
      53        rmdir (dname);
      54        exit (1);
      55      }
      56  
      57    r = ftw (dname2, cb, 10);
      58    e = errno;
      59    printf ("r = %d", r);
      60    if (r != 0)
      61      printf (", errno = %d", errno);
      62    puts ("");
      63  
      64    chmod (dname, S_IRWXU|S_IRWXG|S_IRWXO);
      65    rmdir (dname2);
      66    rmdir (dname);
      67  
      68    return (r != -1 && e == EACCES) || cb_called;
      69  }