77 lines
2.5 KiB
C
77 lines
2.5 KiB
C
/*
|
|
* 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. 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>
|
|
|
|
/*
|
|
* 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()
|
|
*/
|
|
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.
|
|
*/
|
|
return dirp;
|
|
}
|