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c4dcdb9f LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
9 | under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
c4dcdb9f LP |
11 | (at your option) any later version. |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 16 | Lesser General Public License for more details. |
c4dcdb9f | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
c4dcdb9f LP |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
22 | #include <unistd.h> | |
23 | #include <stdio.h> | |
24 | #include <errno.h> | |
25 | #include <string.h> | |
26 | #include <stdlib.h> | |
27 | ||
28 | #ifdef HAVE_SELINUX | |
29 | #include <selinux/selinux.h> | |
30 | #endif | |
31 | ||
32 | #include "selinux-setup.h" | |
4ef31082 | 33 | #include "mount-setup.h" |
c4dcdb9f LP |
34 | #include "macro.h" |
35 | #include "util.h" | |
36 | #include "log.h" | |
0b3325e7 LP |
37 | #include "label.h" |
38 | ||
39 | int selinux_setup(bool *loaded_policy) { | |
c4dcdb9f | 40 | |
c4dcdb9f LP |
41 | #ifdef HAVE_SELINUX |
42 | int enforce = 0; | |
0b3325e7 | 43 | usec_t before_load, after_load; |
0843f2d6 | 44 | security_context_t con; |
0b3325e7 LP |
45 | int r; |
46 | ||
47 | assert(loaded_policy); | |
c4dcdb9f | 48 | |
4ef31082 LP |
49 | /* Make sure getcon() works, which needs /proc and /sys */ |
50 | mount_setup_early(); | |
51 | ||
0b3325e7 LP |
52 | /* Already initialized by somebody else? */ |
53 | r = getcon_raw(&con); | |
54 | if (r == 0) { | |
0843f2d6 LP |
55 | bool initialized; |
56 | ||
57 | initialized = !streq(con, "kernel"); | |
58 | freecon(con); | |
59 | ||
60 | if (initialized) | |
61 | return 0; | |
62 | } | |
c4dcdb9f | 63 | |
0b3325e7 LP |
64 | /* Make sure we have no fds open while loading the policy and |
65 | * transitioning */ | |
66 | log_close(); | |
1829dc9d | 67 | |
0b3325e7 LP |
68 | /* Now load the policy */ |
69 | before_load = now(CLOCK_MONOTONIC); | |
70 | r = selinux_init_load_policy(&enforce); | |
871e5809 | 71 | |
0b3325e7 LP |
72 | if (r == 0) { |
73 | char timespan[FORMAT_TIMESPAN_MAX]; | |
74 | char *label; | |
c4dcdb9f | 75 | |
4d4c7486 LP |
76 | label_retest_selinux(); |
77 | ||
0b3325e7 LP |
78 | /* Transition to the new context */ |
79 | r = label_get_create_label_from_exe(SYSTEMD_BINARY_PATH, &label); | |
4ef31082 | 80 | if (r < 0 || label == NULL) { |
0b3325e7 LP |
81 | log_open(); |
82 | log_error("Failed to compute init label, ignoring."); | |
83 | } else { | |
84 | r = setcon(label); | |
c4dcdb9f | 85 | |
0b3325e7 LP |
86 | log_open(); |
87 | if (r < 0) | |
88 | log_error("Failed to transition into init label '%s', ignoring.", label); | |
c4dcdb9f | 89 | |
0b3325e7 LP |
90 | label_free(label); |
91 | } | |
92 | ||
93 | after_load = now(CLOCK_MONOTONIC); | |
1829dc9d | 94 | |
0b3325e7 LP |
95 | log_info("Successfully loaded SELinux policy in %s.", |
96 | format_timespan(timespan, sizeof(timespan), after_load - before_load)); | |
97 | ||
98 | *loaded_policy = true; | |
99 | ||
100 | } else { | |
878587bd LP |
101 | log_open(); |
102 | ||
25bafad6 | 103 | if (enforce > 0) { |
878587bd | 104 | log_error("Failed to load SELinux policy. Freezing."); |
c4dcdb9f | 105 | return -EIO; |
0b3325e7 | 106 | } else |
878587bd | 107 | log_debug("Unable to load SELinux policy. Ignoring."); |
c4dcdb9f LP |
108 | } |
109 | #endif | |
110 | ||
111 | return 0; | |
112 | } |