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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
6edd7d0a LP |
2 | /*** |
3 | This file is part of systemd. | |
4 | ||
5 | Copyright 2012 Lennart Poettering | |
19adb8a3 | 6 | Copyright 2013 Zbigniew Jędrzejewski-Szmek |
6edd7d0a LP |
7 | |
8 | systemd is free software; you can redistribute it and/or modify it | |
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 | |
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 | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
6edd7d0a | 22 | #include <errno.h> |
19adb8a3 | 23 | #include <getopt.h> |
3f6fd1ba | 24 | #include <stdio.h> |
6edd7d0a | 25 | |
aa62a893 | 26 | #include "sd-messages.h" |
3f6fd1ba LP |
27 | |
28 | #include "def.h" | |
89711996 | 29 | #include "exec-util.h" |
3ffd4af2 | 30 | #include "fd-util.h" |
a5c32cff | 31 | #include "fileio.h" |
3f6fd1ba | 32 | #include "log.h" |
19adb8a3 | 33 | #include "sleep-config.h" |
07630cea | 34 | #include "string-util.h" |
3f6fd1ba LP |
35 | #include "strv.h" |
36 | #include "util.h" | |
19adb8a3 ZJS |
37 | |
38 | static char* arg_verb = NULL; | |
39 | ||
40 | static int write_mode(char **modes) { | |
41 | int r = 0; | |
42 | char **mode; | |
43 | ||
44 | STRV_FOREACH(mode, modes) { | |
aa62a893 LP |
45 | int k; |
46 | ||
4c1fc3e4 | 47 | k = write_string_file("/sys/power/disk", *mode, 0); |
19adb8a3 ZJS |
48 | if (k == 0) |
49 | return 0; | |
aa62a893 | 50 | |
c33b3297 MS |
51 | log_debug_errno(k, "Failed to write '%s' to /sys/power/disk: %m", |
52 | *mode); | |
19adb8a3 ZJS |
53 | if (r == 0) |
54 | r = k; | |
55 | } | |
6edd7d0a | 56 | |
19adb8a3 | 57 | if (r < 0) |
c33b3297 | 58 | log_error_errno(r, "Failed to write mode to /sys/power/disk: %m"); |
6edd7d0a | 59 | |
19adb8a3 ZJS |
60 | return r; |
61 | } | |
6edd7d0a | 62 | |
2fd069b1 | 63 | static int write_state(FILE **f, char **states) { |
19adb8a3 ZJS |
64 | char **state; |
65 | int r = 0; | |
66 | ||
67 | STRV_FOREACH(state, states) { | |
68 | int k; | |
69 | ||
b1837133 | 70 | k = write_string_stream(*f, *state, 0); |
19adb8a3 ZJS |
71 | if (k == 0) |
72 | return 0; | |
c33b3297 MS |
73 | log_debug_errno(k, "Failed to write '%s' to /sys/power/state: %m", |
74 | *state); | |
19adb8a3 ZJS |
75 | if (r == 0) |
76 | r = k; | |
77 | ||
2fd069b1 ZJS |
78 | fclose(*f); |
79 | *f = fopen("/sys/power/state", "we"); | |
4a62c710 MS |
80 | if (!*f) |
81 | return log_error_errno(errno, "Failed to open /sys/power/state: %m"); | |
6edd7d0a LP |
82 | } |
83 | ||
19adb8a3 ZJS |
84 | return r; |
85 | } | |
6edd7d0a | 86 | |
19adb8a3 | 87 | static int execute(char **modes, char **states) { |
e2cc6eca LP |
88 | |
89 | char *arguments[] = { | |
90 | NULL, | |
91 | (char*) "pre", | |
92 | arg_verb, | |
93 | NULL | |
94 | }; | |
b5084605 LP |
95 | static const char* const dirs[] = { |
96 | SYSTEM_SLEEP_PATH, | |
97 | NULL | |
98 | }; | |
e2cc6eca | 99 | |
19adb8a3 | 100 | int r; |
2fd069b1 | 101 | _cleanup_fclose_ FILE *f = NULL; |
6524990f | 102 | |
19adb8a3 | 103 | /* This file is opened first, so that if we hit an error, |
09692409 | 104 | * we can abort before modifying any state. */ |
6edd7d0a | 105 | f = fopen("/sys/power/state", "we"); |
4a62c710 MS |
106 | if (!f) |
107 | return log_error_errno(errno, "Failed to open /sys/power/state: %m"); | |
6edd7d0a | 108 | |
19adb8a3 ZJS |
109 | /* Configure the hibernation mode */ |
110 | r = write_mode(modes); | |
111 | if (r < 0) | |
112 | return r; | |
113 | ||
c6e47247 | 114 | execute_directories(dirs, DEFAULT_TIMEOUT_USEC, NULL, NULL, arguments); |
6edd7d0a | 115 | |
19adb8a3 | 116 | log_struct(LOG_INFO, |
2b044526 | 117 | "MESSAGE_ID=" SD_MESSAGE_SLEEP_START_STR, |
e2cc6eca LP |
118 | LOG_MESSAGE("Suspending system..."), |
119 | "SLEEP=%s", arg_verb, | |
19adb8a3 ZJS |
120 | NULL); |
121 | ||
2fd069b1 | 122 | r = write_state(&f, states); |
19adb8a3 ZJS |
123 | if (r < 0) |
124 | return r; | |
125 | ||
126 | log_struct(LOG_INFO, | |
2b044526 | 127 | "MESSAGE_ID=" SD_MESSAGE_SLEEP_STOP_STR, |
a5ccdb98 | 128 | LOG_MESSAGE("System resumed."), |
e2cc6eca | 129 | "SLEEP=%s", arg_verb, |
19adb8a3 | 130 | NULL); |
eb267289 | 131 | |
6edd7d0a | 132 | arguments[1] = (char*) "post"; |
c6e47247 | 133 | execute_directories(dirs, DEFAULT_TIMEOUT_USEC, NULL, NULL, arguments); |
6edd7d0a | 134 | |
19adb8a3 ZJS |
135 | return r; |
136 | } | |
6edd7d0a | 137 | |
601185b4 | 138 | static void help(void) { |
19adb8a3 ZJS |
139 | printf("%s COMMAND\n\n" |
140 | "Suspend the system, hibernate the system, or both.\n\n" | |
141 | "Commands:\n" | |
142 | " -h --help Show this help and exit\n" | |
143 | " --version Print version string and exit\n" | |
144 | " suspend Suspend the system\n" | |
145 | " hibernate Hibernate the system\n" | |
146 | " hybrid-sleep Both hibernate and suspend the system\n" | |
601185b4 | 147 | , program_invocation_short_name); |
19adb8a3 | 148 | } |
6edd7d0a | 149 | |
19adb8a3 ZJS |
150 | static int parse_argv(int argc, char *argv[]) { |
151 | enum { | |
152 | ARG_VERSION = 0x100, | |
153 | }; | |
154 | ||
155 | static const struct option options[] = { | |
156 | { "help", no_argument, NULL, 'h' }, | |
157 | { "version", no_argument, NULL, ARG_VERSION }, | |
eb9da376 | 158 | {} |
19adb8a3 ZJS |
159 | }; |
160 | ||
161 | int c; | |
162 | ||
163 | assert(argc >= 0); | |
164 | assert(argv); | |
165 | ||
601185b4 | 166 | while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) |
19adb8a3 ZJS |
167 | switch(c) { |
168 | case 'h': | |
601185b4 ZJS |
169 | help(); |
170 | return 0; /* done */ | |
19adb8a3 ZJS |
171 | |
172 | case ARG_VERSION: | |
3f6fd1ba | 173 | return version(); |
19adb8a3 ZJS |
174 | |
175 | case '?': | |
176 | return -EINVAL; | |
177 | ||
178 | default: | |
eb9da376 | 179 | assert_not_reached("Unhandled option"); |
19adb8a3 ZJS |
180 | } |
181 | ||
182 | if (argc - optind != 1) { | |
183 | log_error("Usage: %s COMMAND", | |
184 | program_invocation_short_name); | |
185 | return -EINVAL; | |
186 | } | |
187 | ||
188 | arg_verb = argv[optind]; | |
6edd7d0a | 189 | |
19adb8a3 ZJS |
190 | if (!streq(arg_verb, "suspend") && |
191 | !streq(arg_verb, "hibernate") && | |
192 | !streq(arg_verb, "hybrid-sleep")) { | |
193 | log_error("Unknown command '%s'.", arg_verb); | |
194 | return -EINVAL; | |
195 | } | |
196 | ||
197 | return 1 /* work to do */; | |
198 | } | |
199 | ||
200 | int main(int argc, char *argv[]) { | |
201 | _cleanup_strv_free_ char **modes = NULL, **states = NULL; | |
202 | int r; | |
203 | ||
204 | log_set_target(LOG_TARGET_AUTO); | |
205 | log_parse_environment(); | |
206 | log_open(); | |
207 | ||
208 | r = parse_argv(argc, argv); | |
209 | if (r <= 0) | |
210 | goto finish; | |
211 | ||
212 | r = parse_sleep_config(arg_verb, &modes, &states); | |
213 | if (r < 0) | |
214 | goto finish; | |
215 | ||
216 | r = execute(modes, states); | |
217 | ||
218 | finish: | |
219 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; | |
6edd7d0a | 220 | } |