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- /*
- * 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 <sys/param.h>
- #include <dirent.h>
- #include <fcntl.h>
- #include <stdlib.h>
- #include <unistd.h>
-
- long _rewinddir;
-
- /*
- * open a directory.
- */
- DIR *
- opendir(name)
- const char *name;
- {
- register DIR *dirp;
- register int fd;
-
- if ((fd = open(name, 0)) == -1)
- return NULL;
- if (fcntl(fd, F_SETFD, 1) == -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()
- */
- #ifndef THINK_C
- if ((CLSIZE % DIRBLKSIZ) == 0) {
- dirp->dd_buf = malloc(CLSIZE);
- dirp->dd_len = CLSIZE;
- } else
- #endif
- {
- dirp->dd_buf = malloc(DIRBLKSIZ);
- dirp->dd_len = DIRBLKSIZ;
- }
- 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.
- */
- _rewinddir = telldir(dirp);
- return dirp;
- }
-