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
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
|
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 2010 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <assert.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
#include <sys/prctl.h>
#include <sys/capability.h>
#include "macro.h"
#include "audit.h"
#include "util.h"
#include "log.h"
int audit_session_from_pid(pid_t pid, uint32_t *id) {
char *s;
uint32_t u;
int r;
assert(id);
if (have_effective_cap(CAP_AUDIT_CONTROL) <= 0)
return -ENOENT;
if (pid == 0)
r = read_one_line_file("/proc/self/sessionid", &s);
else {
char *p;
if (asprintf(&p, "/proc/%lu/sessionid", (unsigned long) pid) < 0)
return -ENOMEM;
r = read_one_line_file(p, &s);
free(p);
}
if (r < 0)
return r;
r = safe_atou32(s, &u);
free(s);
if (r < 0)
return r;
if (u == (uint32_t) -1 || u <= 0)
return -ENOENT;
*id = u;
return 0;
}
int audit_loginuid_from_pid(pid_t pid, uid_t *uid) {
char *s;
uid_t u;
int r;
assert(uid);
/* Only use audit login uid if we are executed with sufficient
* capabilities so that pam_loginuid could do its job. If we
* are lacking the CAP_AUDIT_CONTROL capabality we most likely
* are being run in a container and /proc/self/loginuid is
* useless since it probably contains a uid of the host
* system. */
if (have_effective_cap(CAP_AUDIT_CONTROL) <= 0)
return -ENOENT;
if (pid == 0)
r = read_one_line_file("/proc/self/loginuid", &s);
else {
char *p;
if (asprintf(&p, "/proc/%lu/loginuid", (unsigned long) pid) < 0)
return -ENOMEM;
r = read_one_line_file(p, &s);
free(p);
}
if (r < 0)
return r;
r = parse_uid(s, &u);
free(s);
if (r < 0)
return r;
if (u == (uid_t) -1)
return -ENOENT;
*uid = (uid_t) u;
return 0;
}
|
GitWeb