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d6c9574f | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
302e8c4c LP |
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 | |
302e8c4c 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. |
302e8c4c | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
302e8c4c LP |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
302e8c4c | 22 | #include <errno.h> |
07630cea | 23 | #include <stdio.h> |
302e8c4c LP |
24 | #include <stdlib.h> |
25 | ||
b5efdb8a | 26 | #include "alloc-util.h" |
a5c32cff | 27 | #include "fileio.h" |
cf0fbc49 | 28 | #include "hostname-setup.h" |
958b66ea | 29 | #include "hostname-util.h" |
07630cea LP |
30 | #include "log.h" |
31 | #include "macro.h" | |
32 | #include "string-util.h" | |
33 | #include "util.h" | |
302e8c4c | 34 | |
302e8c4c LP |
35 | int hostname_setup(void) { |
36 | int r; | |
46a2911b LP |
37 | _cleanup_free_ char *b = NULL; |
38 | const char *hn; | |
fb3d2b8f | 39 | bool enoent = false; |
302e8c4c | 40 | |
139e5336 | 41 | r = read_hostname_config("/etc/hostname", &b); |
fb3d2b8f | 42 | if (r < 0) { |
28695e0f | 43 | if (r == -ENOENT) |
fb3d2b8f | 44 | enoent = true; |
28695e0f | 45 | else |
da927ba9 | 46 | log_warning_errno(r, "Failed to read configured hostname: %m"); |
46a2911b LP |
47 | |
48 | hn = NULL; | |
28695e0f LP |
49 | } else |
50 | hn = b; | |
302e8c4c | 51 | |
344de609 LP |
52 | if (isempty(hn)) { |
53 | /* Don't override the hostname if it is already set | |
54 | * and not explicitly configured */ | |
55 | if (hostname_is_set()) | |
46a2911b | 56 | return 0; |
9bec0b1e | 57 | |
fb3d2b8f LP |
58 | if (enoent) |
59 | log_info("No hostname configured."); | |
60 | ||
9bec0b1e LP |
61 | hn = "localhost"; |
62 | } | |
63 | ||
709f6e46 MS |
64 | r = sethostname_idempotent(hn); |
65 | if (r < 0) | |
66 | return log_warning_errno(r, "Failed to set hostname to <%s>: %m", hn); | |
302e8c4c | 67 | |
46a2911b LP |
68 | log_info("Set hostname to <%s>.", hn); |
69 | return 0; | |
302e8c4c | 70 | } |