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
96
97
98
99
100
101
102
103
|
/*
* Copyright (c) 2011 , Peter Vrabec <pvrabec@redhat.com>
* 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. The name of the copyright holders or contributors may not be used to
* endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT
* HOLDERS 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.
*/
#include <config.h>
#ifdef WITH_SELINUX
#include "defines.h"
#include <selinux/selinux.h>
#include "prototypes.h"
static bool selinux_checked = false;
static bool selinux_enabled;
/*
* set_selinux_file_context - Set the security context before any file or
* directory creation.
*
* set_selinux_file_context () should be called before any creation
* of file, symlink, directory, ...
*
* Callers may have to Reset SELinux to create files with default
* contexts with reset_selinux_file_context
*/
int set_selinux_file_context (const char *dst_name)
{
/*@null@*/security_context_t scontext = NULL;
if (!selinux_checked) {
selinux_enabled = is_selinux_enabled () > 0;
selinux_checked = true;
}
if (selinux_enabled) {
/* Get the default security context for this file */
if (matchpathcon (dst_name, 0, &scontext) < 0) {
if (security_getenforce () != 0) {
return 1;
}
}
/* Set the security context for the next created file */
if (setfscreatecon (scontext) < 0) {
if (security_getenforce () != 0) {
return 1;
}
}
freecon (scontext);
}
return 0;
}
/*
* reset_selinux_file_context - Reset the security context to the default
* policy behavior
*
* reset_selinux_file_context () should be called after the context
* was changed with set_selinux_file_context ()
*/
int reset_selinux_file_context (void)
{
if (!selinux_checked) {
selinux_enabled = is_selinux_enabled () > 0;
selinux_checked = true;
}
if (selinux_enabled) {
if (setfscreatecon (NULL) != 0) {
return 1;
}
}
return 0;
}
#else /* !WITH_SELINUX */
extern int errno; /* warning: ANSI C forbids an empty source file */
#endif /* !WITH_SELINUX */
|