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glibc  2.9
Functions | Variables
bug-ftw4.c File Reference
#include <fcntl.h>
#include <ftw.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/stat.h>
#include <unistd.h>

Go to the source code of this file.

Functions

static int cb (const char *name, const struct stat64 *st, int type)
int main (void)

Variables

static int cb_called

Function Documentation

static int cb ( const char *  name,
const struct stat64 st,
int  type 
) [static]

Definition at line 32 of file bug-ftw4.c.

{
  return cb_called++ & 1;
}

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int main ( void  )

Definition at line 38 of file bug-ftw4.c.

{
  char name[32] = "/tmp/ftwXXXXXX", *p;
  int ret, i, result = 0, fd, fd1, fd2;

  if (mkdtemp (name) == NULL)
    {
      printf ("Couldn't make temporary directory: %m\n");
      exit (EXIT_FAILURE);
    }
  p = strchr (name, '\0');
  strcpy (p, "/1");
  if (mkdir (name, 0755) < 0)
    {
      printf ("Couldn't make temporary subdirectory: %m\n");
      exit (EXIT_FAILURE);
    }
  *p = '\0';

  ret = ftw64 (name, cb, 20);
  if (ret != 1)
    {
      printf ("ftw64 returned %d instead of 1", ret);
      result = 1;
    }

  fd = open (name, O_RDONLY);
  if (fd < 0)
    {
      printf ("open failed: %m\n");
      result = 1;
    }
  fd1 = open (name, O_RDONLY);
  if (fd1 < 0)
    {
      printf ("open failed: %m\n");
      result = 1;
    }
  else
    close (fd1);
  if (fd >= 0)
    close (fd);

  for (i = 0; i < 128; ++i)
    {
      ret = ftw64 (name, cb, 20);
      if (ret != 1)
       {
         printf ("ftw64 returned %d instead of 1", ret);
         result = 1;
       }
    }

  fd = open (name, O_RDONLY);
  if (fd < 0)
    {
      printf ("open failed: %m\n");
      result = 1;
    }
  fd2 = open (name, O_RDONLY);
  if (fd2 < 0)
    {
      printf ("open failed: %m\n");
      result = 1;
    }
  else
    close (fd2);
  if (fd >= 0)
    close (fd);

  if (fd2 >= fd1 + 128)
    {
      printf ("ftw64 leaking fds: %d -> %d\n", fd1, fd2);
      result = 1;
    }

  if (cb_called != 129 * 2)
    {
      printf ("callback called %d times\n", cb_called);
      result = 1;
    }

  strcpy (p, "/1");
  rmdir (name);
  *p = '\0';
  rmdir (name);
  return result;
}

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Variable Documentation

int cb_called [static]

Definition at line 29 of file bug-ftw4.c.