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e9278741 LP |
1 | /*** |
2 | This file is part of systemd. | |
3 | ||
4 | Copyright 2010 Lennart Poettering | |
5 | ||
6 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
7 | under the terms of the GNU Lesser General Public License as published by |
8 | the Free Software Foundation; either version 2.1 of the License, or | |
e9278741 LP |
9 | (at your option) any later version. |
10 | ||
11 | systemd is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 14 | Lesser General Public License for more details. |
e9278741 | 15 | |
5430f7f2 | 16 | You should have received a copy of the GNU Lesser General Public License |
e9278741 LP |
17 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
18 | ***/ | |
19 | ||
e9278741 | 20 | #include <errno.h> |
07630cea | 21 | #include <unistd.h> |
e9278741 | 22 | |
07630cea | 23 | #include "fileio.h" |
ea4e6292 | 24 | #include "fileio-label.h" |
e9278741 | 25 | #include "log.h" |
ea4e6292 | 26 | #include "selinux-util.h" |
07630cea | 27 | #include "string-util.h" |
e9278741 | 28 | #include "util.h" |
e9278741 LP |
29 | |
30 | int main(int argc, char*argv[]) { | |
e9278741 LP |
31 | |
32 | if (argc != 2) { | |
33 | log_error("This program requires one argument."); | |
34 | return EXIT_FAILURE; | |
35 | } | |
36 | ||
4cfa2c99 | 37 | log_set_target(LOG_TARGET_AUTO); |
e9278741 LP |
38 | log_parse_environment(); |
39 | log_open(); | |
40 | ||
4c12626c LP |
41 | umask(0022); |
42 | ||
c3dacc8b | 43 | mac_selinux_init(); |
ea4e6292 | 44 | |
e9278741 | 45 | if (streq(argv[1], "start")) { |
fe5af612 | 46 | int r = 0; |
e9278741 | 47 | |
ece174c5 | 48 | if (unlink("/run/nologin") < 0 && errno != ENOENT) |
76ef789d LP |
49 | r = log_error_errno(errno, |
50 | "Failed to remove /run/nologin file: %m"); | |
e9278741 | 51 | |
4a8a5b29 | 52 | if (unlink("/etc/nologin") < 0 && errno != ENOENT) { |
bd118f8e LP |
53 | /* If the file doesn't exist and /etc simply |
54 | * was read-only (in which case unlink() | |
55 | * returns EROFS even if the file doesn't | |
56 | * exist), don't complain */ | |
57 | ||
58 | if (errno != EROFS || access("/etc/nologin", F_OK) >= 0) { | |
56f64d95 | 59 | log_error_errno(errno, "Failed to remove /etc/nologin file: %m"); |
fe5af612 | 60 | return EXIT_FAILURE; |
bd118f8e | 61 | } |
e9278741 LP |
62 | } |
63 | ||
fe5af612 LP |
64 | if (r < 0) |
65 | return EXIT_FAILURE; | |
4a8a5b29 | 66 | |
e9278741 | 67 | } else if (streq(argv[1], "stop")) { |
7fb3ee51 | 68 | int r; |
e9278741 | 69 | |
ea4e6292 | 70 | r = write_string_file_atomic_label("/run/nologin", "System is going down."); |
fe5af612 | 71 | if (r < 0) { |
da927ba9 | 72 | log_error_errno(r, "Failed to create /run/nologin: %m"); |
fe5af612 LP |
73 | return EXIT_FAILURE; |
74 | } | |
e9278741 | 75 | |
e9278741 LP |
76 | } else { |
77 | log_error("Unknown verb %s.", argv[1]); | |
fe5af612 | 78 | return EXIT_FAILURE; |
e9278741 LP |
79 | } |
80 | ||
ea4e6292 MS |
81 | mac_selinux_finish(); |
82 | ||
fe5af612 | 83 | return EXIT_SUCCESS; |
e9278741 | 84 | } |