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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 | |
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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. |
e9278741 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
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19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
22 | #include <string.h> | |
23 | #include <unistd.h> | |
24 | #include <errno.h> | |
25 | ||
26 | #include "log.h" | |
27 | #include "util.h" | |
a5c32cff | 28 | #include "fileio.h" |
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29 | |
30 | int main(int argc, char*argv[]) { | |
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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 | ||
e9278741 | 43 | if (streq(argv[1], "start")) { |
fe5af612 | 44 | int r = 0; |
e9278741 | 45 | |
db019b8d KS |
46 | if (unlink("/run/nologin") < 0 && errno != ENOENT) { |
47 | log_error("Failed to remove /run/nologin file: %m"); | |
4a8a5b29 LP |
48 | r = -errno; |
49 | } | |
e9278741 | 50 | |
4a8a5b29 | 51 | if (unlink("/etc/nologin") < 0 && errno != ENOENT) { |
bd118f8e LP |
52 | /* If the file doesn't exist and /etc simply |
53 | * was read-only (in which case unlink() | |
54 | * returns EROFS even if the file doesn't | |
55 | * exist), don't complain */ | |
56 | ||
57 | if (errno != EROFS || access("/etc/nologin", F_OK) >= 0) { | |
58 | log_error("Failed to remove /etc/nologin file: %m"); | |
fe5af612 | 59 | return EXIT_FAILURE; |
bd118f8e | 60 | } |
e9278741 LP |
61 | } |
62 | ||
fe5af612 LP |
63 | if (r < 0) |
64 | return EXIT_FAILURE; | |
4a8a5b29 | 65 | |
e9278741 | 66 | } else if (streq(argv[1], "stop")) { |
7fb3ee51 | 67 | int r; |
e9278741 | 68 | |
574d5f2d | 69 | r = write_string_file_atomic("/run/nologin", "System is going down."); |
fe5af612 | 70 | if (r < 0) { |
0a1beeb6 | 71 | log_error_errno(-r, "Failed to create /run/nologin: %m"); |
fe5af612 LP |
72 | return EXIT_FAILURE; |
73 | } | |
e9278741 | 74 | |
e9278741 LP |
75 | } else { |
76 | log_error("Unknown verb %s.", argv[1]); | |
fe5af612 | 77 | return EXIT_FAILURE; |
e9278741 LP |
78 | } |
79 | ||
fe5af612 | 80 | return EXIT_SUCCESS; |
e9278741 | 81 | } |