blob: 3d9e7ab5f732d8e0cae266d49d66fb51ae45ebc8 (
plain)
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
|
/*
* $Id: cap_alloc.c,v 1.3 1998/05/24 22:54:09 morgan Exp $
*
* Copyright (c) 1997-8 Andrew G Morgan <morgan@linux.kernel.org>
*
* See end of file for Log.
*
* This file deals with allocation and deallocation of internal
* capability sets as specified by POSIX.1e (formerlly, POSIX 6).
*/
#include "libcap.h"
/*
* This function duplicates an internal capability set (x3) with
* malloc()'d memory. It is the responsibility of the user to call
* cap_free() to liberate it.
*/
cap_t cap_dup(cap_t cap_d)
{
cap_t result;
if (!good_cap_t(cap_d)) {
_cap_debug("bad argument");
errno = EINVAL;
return NULL;
}
result = (cap_t) malloc( sizeof(*cap_d) );
if (result == NULL) {
_cap_debug("out of memory");
errno = ENOMEM;
return NULL;
}
memcpy(result, cap_d, sizeof(*cap_d));
return result;
}
/*
* Scrub and then liberate an internal capability set.
*/
int cap_free(cap_t *cap_d_p)
{
if ( cap_d_p && good_cap_t(*cap_d_p) ) {
memset(*cap_d_p, 0, sizeof(**cap_d_p));
free(*cap_d_p);
*cap_d_p = NULL;
return 0;
} else {
_cap_debug("no capability to liberate");
errno = EINVAL;
return -1;
}
}
/*
* Obtain a blank set of capabilities
*/
cap_t cap_init(void)
{
cap_t result = (cap_t) calloc( 1, sizeof(*result) );
if (result) {
result->magic = CAP_T_MAGIC;
result->head.version = _LINUX_CAPABILITY_VERSION;
} else {
errno = ENOMEM;
}
return result;
}
/*
* $Log: cap_alloc.c,v $
* Revision 1.3 1998/05/24 22:54:09 morgan
* updated for 2.1.104
*
* Revision 1.2 1997/04/28 00:57:11 morgan
* fixes and zefram's patches
*
* Revision 1.1 1997/04/21 04:32:52 morgan
* Initial revision
*
*/
|
