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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
302e8c4c LP |
2 | /*** |
3 | This file is part of systemd. | |
4 | ||
5 | Copyright 2010 Lennart Poettering | |
302e8c4c LP |
6 | ***/ |
7 | ||
302e8c4c | 8 | #include <errno.h> |
07630cea | 9 | #include <stdio.h> |
302e8c4c LP |
10 | #include <stdlib.h> |
11 | ||
b5efdb8a | 12 | #include "alloc-util.h" |
a5c32cff | 13 | #include "fileio.h" |
cf0fbc49 | 14 | #include "hostname-setup.h" |
958b66ea | 15 | #include "hostname-util.h" |
07630cea LP |
16 | #include "log.h" |
17 | #include "macro.h" | |
18 | #include "string-util.h" | |
19 | #include "util.h" | |
302e8c4c | 20 | |
302e8c4c | 21 | int hostname_setup(void) { |
46a2911b | 22 | _cleanup_free_ char *b = NULL; |
fb3d2b8f | 23 | bool enoent = false; |
8341d4fa LP |
24 | const char *hn; |
25 | int r; | |
302e8c4c | 26 | |
f35cb39e | 27 | r = read_etc_hostname(NULL, &b); |
fb3d2b8f | 28 | if (r < 0) { |
28695e0f | 29 | if (r == -ENOENT) |
fb3d2b8f | 30 | enoent = true; |
28695e0f | 31 | else |
da927ba9 | 32 | log_warning_errno(r, "Failed to read configured hostname: %m"); |
46a2911b LP |
33 | |
34 | hn = NULL; | |
28695e0f LP |
35 | } else |
36 | hn = b; | |
302e8c4c | 37 | |
344de609 LP |
38 | if (isempty(hn)) { |
39 | /* Don't override the hostname if it is already set | |
40 | * and not explicitly configured */ | |
41 | if (hostname_is_set()) | |
46a2911b | 42 | return 0; |
9bec0b1e | 43 | |
fb3d2b8f LP |
44 | if (enoent) |
45 | log_info("No hostname configured."); | |
46 | ||
8341d4fa | 47 | hn = FALLBACK_HOSTNAME; |
9bec0b1e LP |
48 | } |
49 | ||
709f6e46 MS |
50 | r = sethostname_idempotent(hn); |
51 | if (r < 0) | |
52 | return log_warning_errno(r, "Failed to set hostname to <%s>: %m", hn); | |
302e8c4c | 53 | |
46a2911b LP |
54 | log_info("Set hostname to <%s>.", hn); |
55 | return 0; | |
302e8c4c | 56 | } |