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
|
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 2011 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 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
General Public License for more details.
You should have received a copy of the GNU General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <errno.h>
#include <string.h>
#include "logind-acl.h"
#include "util.h"
#include "log.h"
int main(int argc, char *argv[]) {
int r;
const char *path = NULL, *seat;
char *p, *active_uid = NULL;
unsigned long ul;
bool changed_acl = false;
log_set_target(LOG_TARGET_AUTO);
log_parse_environment();
log_open();
if (argc < 2 || argc > 3) {
log_error("This program expects one or two arguments.");
r = -EINVAL;
goto finish;
}
path = argv[1];
seat = argc < 3 || isempty(argv[2]) ? "seat0" : argv[2];
p = strappend("/run/systemd/seats/", seat);
if (!p) {
log_error("Out of memory.");
r = -ENOMEM;
goto finish;
}
r = parse_env_file(p, NEWLINE,
"ACTIVE_UID", &active_uid,
NULL);
free(p);
if (r < 0) {
if (errno == ENOENT) {
r = 0;
goto finish;
}
log_error("Failed to read seat data for %s: %s", seat, strerror(-r));
goto finish;
}
if (active_uid) {
r = safe_atolu(active_uid, &ul);
if (r < 0) {
log_error("Failed to parse active UID value %s: %s", active_uid, strerror(-r));
goto finish;
}
r = devnode_acl(path, true, false, 0, true, (uid_t) ul);
if (r < 0) {
log_error("Failed to apply ACL on %s: %s", path, strerror(-r));
goto finish;
}
changed_acl = true;
}
r = 0;
finish:
if (path && !changed_acl) {
int k;
/* Better be safe that sorry and reset ACL */
k = devnode_acl(path, true, false, 0, false, 0);
if (k < 0) {
log_error("Failed to apply ACL on %s: %s", path, strerror(-k));
if (r >= 0)
r = k;
}
}
free(active_uid);
return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}
|
