1 files changed, 136 insertions, 0 deletions
diff --git a/StdLib/PosixLib/Gen/opendir.c b/StdLib/PosixLib/Gen/opendir.c
new file mode 100644
index 0000000000..cb4ffbc477
--- /dev/null
+++ b/StdLib/PosixLib/Gen/opendir.c
@@ -0,0 +1,136 @@
+/** @file
+    Open a directory.
+
+    Copyright (c) 2010 - 2011, Intel Corporation. All rights reserved.<BR>
+    This program and the accompanying materials
+    are licensed and made available under the terms and conditions of the BSD License
+    which accompanies this distribution.  The full text of the license may be found at
+    http://opensource.org/licenses/bsd-license.php
+
+    THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+    WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+    Copyright (c) 1983, 1993
+    The Regents of the University of California.  All rights reserved.
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+    1. Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+    3. Neither the name of the University nor the names of its contributors
+      may be used to endorse or promote products derived from this software
+      without specific prior written permission.
+
+    THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+    ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+    ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+    FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+    DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+    OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+    HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+    LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+    OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+    SUCH DAMAGE.
+
+    NetBSD: opendir.c,v 1.33 2008/01/10 09:49:04 elad Exp
+    opendir.c 8.7 (Berkeley) 12/10/94
+**/
+#include <sys/cdefs.h>
+
+#include  <namespace.h>
+#include  <reentrant.h>
+#include  <extern.h>
+#include <sys/param.h>
+//#include <sys/mount.h>
+#include <sys/stat.h>
+
+#include <assert.h>
+#include <dirent.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#define MAXITERATIONS 100
+
+/*
+ * Open a directory.
+ */
+DIR *
+opendir(const char *name)
+{
+  _DIAGASSERT(name != NULL);
+
+  return (__opendir2(name, DTF_HIDEW|DTF_NODUP));
+}
+
+DIR *
+__opendir2(const char *name, int flags)
+{
+  DIR *dirp = NULL;
+  int fd;
+  int serrno;
+  struct stat sb;
+  int incr;
+
+  _DIAGASSERT(name != NULL);
+
+  if ((fd = open(name, O_RDONLY | O_NONBLOCK, 0)) == -1 ||
+      fcntl(fd, F_SETFD, FD_CLOEXEC) == -1)
+    goto error;
+  if (fstat(fd, &sb) || !S_ISDIR(sb.st_mode)) {
+    errno = ENOTDIR;
+    goto error;
+  }
+  if ((dirp = (DIR *)malloc(sizeof(DIR))) == NULL)
+    goto error;
+  dirp->dd_buf = NULL;
+
+  /*
+   * If the machine's page size is an exact multiple of DIRBLKSIZ,
+   * use a buffer that is cluster boundary aligned.
+   * Hopefully this can be a big win someday by allowing page trades
+   * to user space to be done by getdirentries()
+   */
+  incr = DIRBLKSIZ;
+
+  dirp->dd_len = incr;
+  dirp->dd_buf = malloc((size_t)dirp->dd_len);
+  if (dirp->dd_buf == NULL)
+    goto error;
+  dirp->dd_seek = 0;
+  flags &= ~DTF_REWIND;
+
+  dirp->dd_loc = 0;
+  dirp->dd_fd = fd;
+  dirp->dd_flags = flags;
+
+  /*
+   * Set up seek point for rewinddir.
+   */
+#ifdef _REENTRANT
+  if (__isthreaded) {
+    if ((dirp->dd_lock = malloc(sizeof(mutex_t))) == NULL)
+      goto error;
+    mutex_init((mutex_t *)dirp->dd_lock, NULL);
+  }
+#endif
+  dirp->dd_internal = NULL;
+  return (dirp);
+error:
+  serrno = errno;
+  if (dirp && dirp->dd_buf)
+    free(dirp->dd_buf);
+  if (dirp)
+    free(dirp);
+  if (fd != -1)
+    (void)close(fd);
+  errno = serrno;
+  return NULL;
+}