Merge from vendor branch BZIP:
[dragonfly.git] / lib / libc / gen / posixshm.c
CommitLineData
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1/*
2 * Copyright 2000 Massachusetts Institute of Technology
3 *
4 * Permission to use, copy, modify, and distribute this software and
5 * its documentation for any purpose and without fee is hereby
6 * granted, provided that both the above copyright notice and this
7 * permission notice appear in all copies, that both the above
8 * copyright notice and this permission notice appear in all
9 * supporting documentation, and that the name of M.I.T. not be used
10 * in advertising or publicity pertaining to distribution of the
11 * software without specific, written prior permission. M.I.T. makes
12 * no representations about the suitability of this software for any
13 * purpose. It is provided "as is" without express or implied
14 * warranty.
15 *
16 * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
17 * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
18 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
20 * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
23 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
26 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * $FreeBSD: src/lib/libc/gen/posixshm.c,v 1.2.2.1 2000/08/22 01:48:12 jhb Exp $
17ea2221 30 * $DragonFly: src/lib/libc/gen/posixshm.c,v 1.3 2005/01/31 22:29:15 dillon Exp $
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31 */
32
17ea2221 33#include "namespace.h"
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34#include <sys/types.h>
35#include <sys/fcntl.h>
36#include <sys/mman.h>
37#include <sys/stat.h>
38
39#include <errno.h>
40#include <unistd.h>
17ea2221 41#include "un-namespace.h"
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42
43int
44shm_open(const char *path, int flags, mode_t mode)
45{
46 int fd;
47 struct stat stab;
48
49 if ((flags & O_ACCMODE) == O_WRONLY)
50 return (EINVAL);
51
52 fd = _open(path, flags, mode);
53 if (fd != -1) {
17ea2221 54 if (_fstat(fd, &stab) != 0 || !S_ISREG(stab.st_mode)) {
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55 _close(fd);
56 errno = EINVAL;
57 return (-1);
58 }
59
60 if (_fcntl(fd, F_SETFL, (int)FPOSIXSHM) != 0) {
61 _close(fd);
62 return (-1);
63 }
64 }
65 return (fd);
66}
67
68int
69shm_unlink(const char *path)
70{
71 return (unlink(path));
72}