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d2c68822 IS |
1 | /*** |
2 | This file is part of systemd. | |
3 | ||
4 | Copyright 2014 Ivan Shapovalov | |
5 | ||
6 | systemd is free software; you can redistribute it and/or modify it | |
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 | |
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 | |
14 | Lesser General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public License | |
17 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
18 | ***/ | |
19 | ||
d2c68822 | 20 | #include <errno.h> |
07630cea | 21 | #include <stdio.h> |
d2c68822 | 22 | |
b5efdb8a | 23 | #include "alloc-util.h" |
6550203e | 24 | #include "fstab-util.h" |
d2c68822 | 25 | #include "log.h" |
d2c68822 | 26 | #include "mkdir.h" |
4e731273 | 27 | #include "proc-cmdline.h" |
07630cea LP |
28 | #include "special.h" |
29 | #include "string-util.h" | |
d2c68822 | 30 | #include "unit-name.h" |
07630cea | 31 | #include "util.h" |
d2c68822 IS |
32 | |
33 | static const char *arg_dest = "/tmp"; | |
34 | static char *arg_resume_dev = NULL; | |
35 | ||
96287a49 | 36 | static int parse_proc_cmdline_item(const char *key, const char *value, void *data) { |
7410616c | 37 | |
d2c68822 IS |
38 | if (streq(key, "resume") && value) { |
39 | free(arg_resume_dev); | |
40 | arg_resume_dev = fstab_node_to_udev_node(value); | |
41 | if (!arg_resume_dev) | |
42 | return log_oom(); | |
43 | } | |
44 | ||
45 | return 0; | |
46 | } | |
47 | ||
48 | static int process_resume(void) { | |
49 | _cleanup_free_ char *name = NULL, *lnk = NULL; | |
7410616c | 50 | int r; |
d2c68822 | 51 | |
b5884878 LP |
52 | if (!arg_resume_dev) |
53 | return 0; | |
54 | ||
7410616c LP |
55 | r = unit_name_from_path_instance("systemd-hibernate-resume", arg_resume_dev, ".service", &name); |
56 | if (r < 0) | |
57 | return log_error_errno(r, "Failed to generate unit name: %m"); | |
d2c68822 | 58 | |
605405c6 | 59 | lnk = strjoin(arg_dest, "/" SPECIAL_SYSINIT_TARGET ".wants/", name); |
d2c68822 IS |
60 | if (!lnk) |
61 | return log_oom(); | |
62 | ||
63 | mkdir_parents_label(lnk, 0755); | |
4a62c710 MS |
64 | if (symlink(SYSTEM_DATA_UNIT_PATH "/systemd-hibernate-resume@.service", lnk) < 0) |
65 | return log_error_errno(errno, "Failed to create symlink %s: %m", lnk); | |
d2c68822 IS |
66 | |
67 | return 0; | |
68 | } | |
69 | ||
70 | int main(int argc, char *argv[]) { | |
71 | int r = 0; | |
72 | ||
73 | if (argc > 1 && argc != 4) { | |
74 | log_error("This program takes three or no arguments."); | |
75 | return EXIT_FAILURE; | |
76 | } | |
77 | ||
78 | if (argc > 1) | |
79 | arg_dest = argv[1]; | |
80 | ||
81 | log_set_target(LOG_TARGET_SAFE); | |
82 | log_parse_environment(); | |
83 | log_open(); | |
84 | ||
85 | umask(0022); | |
86 | ||
87 | /* Don't even consider resuming outside of initramfs. */ | |
88 | if (!in_initrd()) | |
89 | return EXIT_SUCCESS; | |
90 | ||
d7f69e16 | 91 | r = parse_proc_cmdline(parse_proc_cmdline_item, NULL, false); |
b5884878 | 92 | if (r < 0) |
da927ba9 | 93 | log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m"); |
d2c68822 | 94 | |
b5884878 | 95 | r = process_resume(); |
d2c68822 IS |
96 | free(arg_resume_dev); |
97 | ||
98 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; | |
99 | } |