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glibc  2.9
Functions
readdir64.c File Reference
#include <dirent.h>
#include <stddef.h>
#include <hurd.h>
#include <hurd/fs.h>
#include <hurd/fd.h>
#include "dirstream.h"

Go to the source code of this file.

Functions

struct dirent64__readdir64 (DIR *dirp)

Function Documentation

struct dirent64* __readdir64 ( DIR *  dirp) [read]

Definition at line 28 of file readdir64.c.

{
  struct dirent64 *dp;

  if (dirp == NULL)
    {
      errno = EINVAL;
      return NULL;
    }

  __libc_lock_lock (dirp->__lock);

  do
    {
      if (dirp->__ptr - dirp->__data >= dirp->__size)
       {
         /* We've emptied out our buffer.  Refill it.  */

         char *data = dirp->__data;
         int nentries;
         error_t err;

         if (err = HURD_FD_PORT_USE (dirp->__fd,
                                  __dir_readdir (port,
                                               &data, &dirp->__size,
                                               dirp->__entry_ptr,
                                               -1, 0, &nentries)))
           {
             __hurd_fail (err);
             dp = NULL;
             break;
           }

         /* DATA now corresponds to entry index DIRP->__entry_ptr.  */
         dirp->__entry_data = dirp->__entry_ptr;

         if (data != dirp->__data)
           {
             /* The data was passed out of line, so our old buffer is no
               longer useful.  Deallocate the old buffer and reset our
               information for the new buffer.  */
             __vm_deallocate (__mach_task_self (),
                            (vm_address_t) dirp->__data,
                            dirp->__allocation);
             dirp->__data = data;
             dirp->__allocation = round_page (dirp->__size);
           }

         /* Reset the pointer into the buffer.  */
         dirp->__ptr = dirp->__data;

         if (nentries == 0)
           {
             /* End of file.  */
             dp = NULL;
             break;
           }

         /* We trust the filesystem to return correct data and so we
            ignore NENTRIES.  */
       }

      dp = (struct dirent64 *) dirp->__ptr;
      dirp->__ptr += dp->d_reclen;
      ++dirp->__entry_ptr;

      /* Loop to ignore deleted files.  */
    } while (dp->d_fileno == 0);

  __libc_lock_unlock (dirp->__lock);

  return dp;
}

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