source: rtems/cpukit/libcsupport/src/opendir.c @ d6c20ff3

4.104.114.84.95
Last change on this file since d6c20ff3 was 9c49db4, checked in by Joel Sherrill <joel.sherrill@…>, on 01/08/01 at 18:26:44

2001-01-08 Ralf Corsepius <corsepiu@…>

  • configure.in: Add libc/config.h
  • libc/Makefile.am: Add INCLUDES += -I. to pickup config.h
  • libc/.cvsignore: Add config.h and stamp-h
  • libc/*.c: Add config.h support.
  • Property mode set to 100644
File size: 2.8 KB
Line 
1/*
2 *  opendir() - POSIX 1003.1b - XXX
3 *
4 *  This was copied from Newlib 1.8.0.
5 *
6 * 
7 * Copyright (c) 1983 Regents of the University of California.
8 * All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 *    must display the following acknowledgement:
20 *      This product includes software developed by the University of
21 *      California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 *    may be used to endorse or promote products derived from this software
24 *    without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 */
38
39#if defined(LIBC_SCCS) && !defined(lint)
40static char sccsid[] = "@(#)opendir.c   5.11 (Berkeley) 2/23/91";
41#endif /* LIBC_SCCS and not lint */
42
43#if HAVE_CONFIG_H
44#include "config.h"
45#endif
46
47#include <dirent.h>
48#include <fcntl.h>
49#include <stdlib.h>
50#include <unistd.h>
51
52/*
53 * open a directory.
54 */
55DIR *
56opendir(name)
57        const char *name;
58{
59        register DIR *dirp;
60        register int fd;
61
62        if ((fd = open(name, 0)) == -1)
63                return NULL;
64        if (fcntl(fd, F_SETFD, 1) == -1 ||
65            (dirp = (DIR *)malloc(sizeof(DIR))) == NULL) {
66                close (fd);
67                return NULL;
68        }
69        /*
70         * If CLSIZE is an exact multiple of DIRBLKSIZ, use a CLSIZE
71         * buffer that it cluster boundary aligned.
72         * Hopefully this can be a big win someday by allowing page trades
73         * to user space to be done by getdirentries()
74         */
75        dirp->dd_buf = malloc (512);
76        dirp->dd_len = 512;
77
78        if (dirp->dd_buf == NULL) {
79                close (fd);
80                return NULL;
81        }
82        dirp->dd_fd = fd;
83        dirp->dd_loc = 0;
84        dirp->dd_seek = 0;
85        /*
86         * Set up seek point for rewinddir.
87         */
88        return dirp;
89}
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