usr/src/lib/libc/port/gen/opendir.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 /*      Copyright (c) 1988 AT&T */
  28 /*        All Rights Reserved   */
  29
  30 #pragma ident   "%Z%%M% %I%     %E% SMI"
  31
  32 /*
  33  * opendir -- C library extension routine
  34  *
  35  * We use lmalloc()/lfree() rather than malloc()/free() in
  36  * order to allow opendir()/readdir()/closedir() to be called
  37  * while holding internal libc locks.
  38  */
  39
  40 #pragma weak _opendir = opendir
  41
  42 #include "lint.h"
  43 #include <dirent.h>
  44 #include <stdlib.h>
  45 #include <unistd.h>
  46 #include <fcntl.h>
  47
  48 DIR *
  49 opendir(const char *filename)
  50 {
  51         int fd;
  52         DIR *dirp;
  53
  54         if ((fd = openat(AT_FDCWD, filename,
  55             O_RDONLY | O_NDELAY | O_LARGEFILE, 0)) < 0)
  56                 return (NULL);
  57         if ((dirp = fdopendir(fd)) == NULL)
  58                 (void) close(fd);
  59         return (dirp);
  60 }