| /* Copyright (C) 2001-2014 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <dirent.h> |
| #include <stddef.h> |
| #include <string.h> |
| #include <hurd.h> |
| #include <hurd/fs.h> |
| #include <hurd/fd.h> |
| #include "dirstream.h" |
| |
| /* Read a directory entry from DIRP. */ |
| int |
| __readdir64_r (DIR *dirp, struct dirent64 *entry, struct dirent64 **result) |
| { |
| struct dirent64 *dp; |
| error_t err = 0; |
| |
| if (dirp == NULL) |
| { |
| errno = EINVAL; |
| return errno; |
| } |
| |
| __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; |
| |
| 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); |
| |
| if (dp) |
| { |
| *entry = *dp; |
| memcpy (entry->d_name, dp->d_name, dp->d_namlen + 1); |
| *result = entry; |
| } |
| else |
| *result = NULL; |
| |
| __libc_lock_unlock (dirp->__lock); |
| |
| return dp ? 0 : err ? errno : 0; |
| } |
| |
| weak_alias (__readdir64_r, readdir64_r) |