1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
|
/* $Id: vbsfmount.c $ */
/** @file
* vbsfmount - Commonly used code to mount shared folders on Linux-based
* systems. Currently used by mount.vboxsf and VBoxService.
*/
/*
* Copyright (C) 2010-2019 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*/
#include "vbsfmount.h"
#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
#include <ctype.h>
#include <mntent.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mount.h>
/** @todo Use defines for return values! */
int vbsfmount_complete(const char *host_name, const char *mount_point,
unsigned long flags, struct vbsf_mount_opts *opts)
{
FILE *f, *m;
char *buf;
size_t size;
struct mntent e;
int rc = 0;
m = open_memstream(&buf, &size);
if (!m)
return 1; /* Could not update mount table (failed to create memstream). */
if (opts->uid)
fprintf(m, "uid=%d,", opts->uid);
if (opts->gid)
fprintf(m, "gid=%d,", opts->gid);
if (opts->ttl)
fprintf(m, "ttl=%d,", opts->ttl);
if (*opts->nls_name)
fprintf(m, "iocharset=%s,", opts->nls_name);
if (flags & MS_NOSUID)
fprintf(m, "%s,", MNTOPT_NOSUID);
if (flags & MS_RDONLY)
fprintf(m, "%s,", MNTOPT_RO);
else
fprintf(m, "%s,", MNTOPT_RW);
fclose(m);
if (size > 0)
buf[size - 1] = 0;
else
buf = "defaults";
f = setmntent(MOUNTED, "a+");
if (!f)
{
rc = 2; /* Could not open mount table for update. */
}
else
{
e.mnt_fsname = (char*)host_name;
e.mnt_dir = (char*)mount_point;
e.mnt_type = "vboxsf";
e.mnt_opts = buf;
e.mnt_freq = 0;
e.mnt_passno = 0;
if (addmntent(f, &e))
rc = 3; /* Could not add an entry to the mount table. */
endmntent(f);
}
if (size > 0)
{
memset(buf, 0, size);
free(buf);
}
return rc;
}
|
