Subversion Repositories openrisc_me

#ifndef HAVE_OPENDIR

/*

 * Copyright (c) 1983 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. All advertising materials mentioning features or use of this software

 *    must display the following acknowledgement:

 *      This product includes software developed by the University of

 *      California, Berkeley and its contributors.

 * 4. 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.

 */

#if defined(LIBC_SCCS) && !defined(lint)

static char sccsid[] = "@(#)opendir.c   5.11 (Berkeley) 2/23/91";

#endif /* LIBC_SCCS and not lint */

#include <dirent.h>

#include <fcntl.h>

#include <stdlib.h>

#include <unistd.h>

#include <sys/lock.h>

/*

 * open a directory.

 */

DIR *

_DEFUN(opendir, (name),

        const char *name)

{

        register DIR *dirp;

        register int fd;

        int rc = 0;

        if ((fd = open(name, 0)) == -1)

                return NULL;

#ifdef HAVE_FCNTL

        rc = fcntl(fd, F_SETFD, 1);

#endif

        if (rc == -1 ||

            (dirp = (DIR *)malloc(sizeof(DIR))) == NULL) {

                close (fd);

                return NULL;

        }

        /*

         * If CLSIZE is an exact multiple of DIRBLKSIZ, use a CLSIZE

         * buffer that it cluster boundary aligned.

         * Hopefully this can be a big win someday by allowing page trades

         * to user space to be done by getdirentries()

         */

        dirp->dd_buf = malloc (512);

        dirp->dd_len = 512;

        if (dirp->dd_buf == NULL) {

                close (fd);

                return NULL;

        }

        dirp->dd_fd = fd;

        dirp->dd_loc = 0;

        dirp->dd_seek = 0;

        /*

         * Set up seek point for rewinddir.

         */

#ifdef HAVE_DD_LOCK

        /* if we have a locking mechanism, initialize it */

        __lock_init_recursive(dirp->dd_lock);

#endif

        return dirp;

}

#endif /* ! HAVE_OPENDIR */