io/bug-ftw3.c

   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 }