Move common dirent implementation from sysdeps/unix to sysdeps/posix.

1 files changed, 0 insertions, 228 deletions

diff --git a/sysdeps/unix/opendir.c b/sysdeps/unix/opendir.c
deleted file mode 100644
index e093142f62..0000000000
--- a/sysdeps/unix/opendir.c
+++ /dev/null
@@ -1,228 +0,0 @@
-/* Copyright (C) 1991-1996,98,2000-2003,2005,2007,2009,2011
-   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 <assert.h>
-#include <errno.h>
-#include <limits.h>
-#include <stddef.h>
-#include <stdlib.h>
-#include <dirent.h>
-#include <fcntl.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <unistd.h>
-#include <stdio.h>
-#include <string.h>
-
-#include <dirstream.h>
-#include <not-cancel.h>
-#include <kernel-features.h>
-
-
-/* opendir() must not accidentally open something other than a directory.
-   Some OS's have kernel support for that, some don't.  In the worst
-   case we have to stat() before the open() AND fstat() after.
-
-   We have to test at runtime for kernel support since libc may have
-   been compiled with different headers to the kernel it's running on.
-   This test can't be done reliably in the general case.  We'll use
-   /dev/null, which if it's not a device lots of stuff will break, as
-   a guinea pig.  It may be missing in chroot environments, so we
-   make sure to fail safe. */
-#ifdef O_DIRECTORY
-# ifdef O_DIRECTORY_WORKS
-#  define o_directory_works 1
-#  define tryopen_o_directory() while (1) /* This must not be called.  */
-# else
-static int o_directory_works;
-
-static void
-tryopen_o_directory (void)
-{
-  int serrno = errno;
-  int x = open_not_cancel_2 ("/dev/null", O_RDONLY|O_NDELAY|O_DIRECTORY);
-
-  if (x >= 0)
-    {
-      close_not_cancel_no_status (x);
-      o_directory_works = -1;
-    }
-  else if (errno != ENOTDIR)
-    o_directory_works = -1;
-  else
-    o_directory_works = 1;
-
-  __set_errno (serrno);
-}
-# endif
-# define EXTRA_FLAGS O_DIRECTORY
-#else
-# define EXTRA_FLAGS 0
-#endif
-
-
-DIR *
-internal_function
-__opendirat (int dfd, const char *name)
-{
-  struct stat64 statbuf;
-  struct stat64 *statp = NULL;
-
-  if (__builtin_expect (name[0], '\1') == '\0')
-    {
-      /* POSIX.1-1990 says an empty name gets ENOENT;
-	 but `open' might like it fine.  */
-      __set_errno (ENOENT);
-      return NULL;
-    }
-
-#ifdef O_DIRECTORY
-  /* Test whether O_DIRECTORY works.  */
-  if (o_directory_works == 0)
-    tryopen_o_directory ();
-
-  /* We can skip the expensive `stat' call if O_DIRECTORY works.  */
-  if (o_directory_works < 0)
-#endif
-    {
-      /* We first have to check whether the name is for a directory.  We
-	 cannot do this after the open() call since the open/close operation
-	 performed on, say, a tape device might have undesirable effects.  */
-      if (__builtin_expect (__xstat64 (_STAT_VER, name, &statbuf), 0) < 0)
-	return NULL;
-      if (__builtin_expect (! S_ISDIR (statbuf.st_mode), 0))
-	{
-	  __set_errno (ENOTDIR);
-	  return NULL;
-	 }
-    }
-
-  int flags = O_RDONLY|O_NDELAY|EXTRA_FLAGS|O_LARGEFILE;
-#ifdef O_CLOEXEC
-  flags |= O_CLOEXEC;
-#endif
-  int fd;
-#ifdef IS_IN_rtld
-  assert (dfd == AT_FDCWD);
-  fd = open_not_cancel_2 (name, flags);
-#else
-  fd = openat_not_cancel_3 (dfd, name, flags);
-#endif
-  if (__builtin_expect (fd, 0) < 0)
-    return NULL;
-
-#ifdef O_DIRECTORY
-  if (o_directory_works <= 0)
-#endif
-    {
-      /* Now make sure this really is a directory and nothing changed since
-	 the `stat' call.  */
-      if (__builtin_expect (__fxstat64 (_STAT_VER, fd, &statbuf), 0) < 0)
-	goto lose;
-      if (__builtin_expect (! S_ISDIR (statbuf.st_mode), 0))
-	{
-	  __set_errno (ENOTDIR);
-	lose:
-	  close_not_cancel_no_status (fd);
-	  return NULL;
-	}
-      statp = &statbuf;
-    }
-
-  return __alloc_dir (fd, true, 0, statp);
-}
-
-
-/* Open a directory stream on NAME.  */
-DIR *
-__opendir (const char *name)
-{
-  return __opendirat (AT_FDCWD, name);
-}
-weak_alias (__opendir, opendir)
-
-
-#ifdef __ASSUME_O_CLOEXEC
-# define check_have_o_cloexec(fd) 1
-#else
-static int
-check_have_o_cloexec (int fd)
-{
-  if (__have_o_cloexec == 0)
-    __have_o_cloexec = (__fcntl (fd, F_GETFD, 0) & FD_CLOEXEC) == 0 ? -1 : 1;
-  return __have_o_cloexec > 0;
-}
-#endif
-
-
-DIR *
-internal_function
-__alloc_dir (int fd, bool close_fd, int flags, const struct stat64 *statp)
-{
-  /* We always have to set the close-on-exit flag if the user provided
-     the file descriptor.  Otherwise only if we have no working
-     O_CLOEXEC support.  */
-#ifdef O_CLOEXEC
-  if ((! close_fd && (flags & O_CLOEXEC) == 0)
-      || ! check_have_o_cloexec (fd))
-#endif
-    {
-      if (__builtin_expect (__fcntl (fd, F_SETFD, FD_CLOEXEC), 0) < 0)
-	goto lose;
-    }
-
-  const size_t default_allocation = (4 * BUFSIZ < sizeof (struct dirent64)
-				     ? sizeof (struct dirent64) : 4 * BUFSIZ);
-  const size_t small_allocation = (BUFSIZ < sizeof (struct dirent64)
-				   ? sizeof (struct dirent64) : BUFSIZ);
-  size_t allocation = default_allocation;
-#ifdef _STATBUF_ST_BLKSIZE
-  if (statp != NULL && default_allocation < statp->st_blksize)
-    allocation = statp->st_blksize;
-#endif
-
-  DIR *dirp = (DIR *) malloc (sizeof (DIR) + allocation);
-  if (dirp == NULL)
-    {
-      allocation = small_allocation;
-      dirp = (DIR *) malloc (sizeof (DIR) + allocation);
-
-      if (dirp == NULL)
-      lose:
-	{
-	  if (close_fd)
-	    {
-	      int save_errno = errno;
-	      close_not_cancel_no_status (fd);
-	      __set_errno (save_errno);
-	    }
-	  return NULL;
-	}
-    }
-
-  dirp->fd = fd;
-#ifndef NOT_IN_libc
-  __libc_lock_init (dirp->lock);
-#endif
-  dirp->allocation = allocation;
-  dirp->size = 0;
-  dirp->offset = 0;
-  dirp->filepos = 0;
-
-  return dirp;
-}