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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
d2c68822 IS |
2 | /*** |
3 | This file is part of systemd. | |
4 | ||
5 | Copyright 2014 Ivan Shapovalov | |
6 | ||
7 | systemd is free software; you can redistribute it and/or modify it | |
8 | under the terms of the GNU Lesser General Public License as published by | |
9 | the Free Software Foundation; either version 2.1 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | systemd is distributed in the hope that it will be useful, but | |
13 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | Lesser General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU Lesser General Public License | |
18 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
19 | ***/ | |
20 | ||
d2c68822 | 21 | #include <errno.h> |
07630cea | 22 | #include <stdio.h> |
d2c68822 | 23 | |
b5efdb8a | 24 | #include "alloc-util.h" |
6550203e | 25 | #include "fstab-util.h" |
d2c68822 | 26 | #include "log.h" |
d2c68822 | 27 | #include "mkdir.h" |
4e731273 | 28 | #include "proc-cmdline.h" |
07630cea LP |
29 | #include "special.h" |
30 | #include "string-util.h" | |
d2c68822 | 31 | #include "unit-name.h" |
07630cea | 32 | #include "util.h" |
d2c68822 IS |
33 | |
34 | static const char *arg_dest = "/tmp"; | |
1d84ad94 | 35 | static char *arg_resume_device = NULL; |
d2c68822 | 36 | |
96287a49 | 37 | static int parse_proc_cmdline_item(const char *key, const char *value, void *data) { |
7410616c | 38 | |
1d84ad94 LP |
39 | if (streq(key, "resume")) { |
40 | char *s; | |
41 | ||
42 | if (proc_cmdline_value_missing(key, value)) | |
43 | return 0; | |
44 | ||
45 | s = fstab_node_to_udev_node(value); | |
46 | if (!s) | |
d2c68822 | 47 | return log_oom(); |
1d84ad94 LP |
48 | |
49 | free(arg_resume_device); | |
50 | arg_resume_device = s; | |
d2c68822 IS |
51 | } |
52 | ||
53 | return 0; | |
54 | } | |
55 | ||
56 | static int process_resume(void) { | |
57 | _cleanup_free_ char *name = NULL, *lnk = NULL; | |
7410616c | 58 | int r; |
d2c68822 | 59 | |
1d84ad94 | 60 | if (!arg_resume_device) |
b5884878 LP |
61 | return 0; |
62 | ||
1d84ad94 | 63 | r = unit_name_from_path_instance("systemd-hibernate-resume", arg_resume_device, ".service", &name); |
7410616c LP |
64 | if (r < 0) |
65 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
d2c68822 | 66 | |
605405c6 | 67 | lnk = strjoin(arg_dest, "/" SPECIAL_SYSINIT_TARGET ".wants/", name); |
d2c68822 IS |
68 | if (!lnk) |
69 | return log_oom(); | |
70 | ||
71 | mkdir_parents_label(lnk, 0755); | |
4a62c710 MS |
72 | if (symlink(SYSTEM_DATA_UNIT_PATH "/systemd-hibernate-resume@.service", lnk) < 0) |
73 | return log_error_errno(errno, "Failed to create symlink %s: %m", lnk); | |
d2c68822 IS |
74 | |
75 | return 0; | |
76 | } | |
77 | ||
78 | int main(int argc, char *argv[]) { | |
79 | int r = 0; | |
80 | ||
81 | if (argc > 1 && argc != 4) { | |
82 | log_error("This program takes three or no arguments."); | |
83 | return EXIT_FAILURE; | |
84 | } | |
85 | ||
86 | if (argc > 1) | |
87 | arg_dest = argv[1]; | |
88 | ||
89 | log_set_target(LOG_TARGET_SAFE); | |
90 | log_parse_environment(); | |
91 | log_open(); | |
92 | ||
93 | umask(0022); | |
94 | ||
95 | /* Don't even consider resuming outside of initramfs. */ | |
96 | if (!in_initrd()) | |
97 | return EXIT_SUCCESS; | |
98 | ||
1d84ad94 | 99 | r = proc_cmdline_parse(parse_proc_cmdline_item, NULL, 0); |
b5884878 | 100 | if (r < 0) |
da927ba9 | 101 | log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m"); |
d2c68822 | 102 | |
b5884878 | 103 | r = process_resume(); |
1d84ad94 | 104 | free(arg_resume_device); |
d2c68822 IS |
105 | |
106 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; | |
107 | } |