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6edd7d0a LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2012 Lennart Poettering | |
19adb8a3 | 7 | Copyright 2013 Zbigniew Jędrzejewski-Szmek |
6edd7d0a LP |
8 | |
9 | systemd is free software; you can redistribute it and/or modify it | |
10 | under the terms of the GNU Lesser General Public License as published by | |
11 | the Free Software Foundation; either version 2.1 of the License, or | |
12 | (at your option) any later version. | |
13 | ||
14 | systemd is distributed in the hope that it will be useful, but | |
15 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | Lesser General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU Lesser General Public License | |
20 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
21 | ***/ | |
22 | ||
23 | #include <stdio.h> | |
24 | #include <errno.h> | |
25 | #include <string.h> | |
19adb8a3 | 26 | #include <getopt.h> |
6edd7d0a | 27 | |
877d54e9 LP |
28 | #include "systemd/sd-id128.h" |
29 | #include "systemd/sd-messages.h" | |
19adb8a3 ZJS |
30 | #include "log.h" |
31 | #include "util.h" | |
32 | #include "strv.h" | |
a5c32cff | 33 | #include "fileio.h" |
19adb8a3 ZJS |
34 | #include "build.h" |
35 | #include "sleep-config.h" | |
36 | ||
37 | static char* arg_verb = NULL; | |
38 | ||
39 | static int write_mode(char **modes) { | |
40 | int r = 0; | |
41 | char **mode; | |
42 | ||
43 | STRV_FOREACH(mode, modes) { | |
44 | int k = write_string_file("/sys/power/disk", *mode); | |
45 | if (k == 0) | |
46 | return 0; | |
47 | log_debug("Failed to write '%s' to /sys/power/disk: %s", | |
48 | *mode, strerror(-k)); | |
49 | if (r == 0) | |
50 | r = k; | |
51 | } | |
6edd7d0a | 52 | |
19adb8a3 ZJS |
53 | if (r < 0) |
54 | log_error("Failed to write mode to /sys/power/disk: %s", | |
55 | strerror(-r)); | |
6edd7d0a | 56 | |
19adb8a3 ZJS |
57 | return r; |
58 | } | |
6edd7d0a | 59 | |
19adb8a3 ZJS |
60 | static int write_state(FILE *f0, char **states) { |
61 | FILE _cleanup_fclose_ *f = f0; | |
62 | char **state; | |
63 | int r = 0; | |
64 | ||
65 | STRV_FOREACH(state, states) { | |
66 | int k; | |
67 | ||
68 | k = write_string_to_file(f, *state); | |
69 | if (k == 0) | |
70 | return 0; | |
71 | log_debug("Failed to write '%s' to /sys/power/state: %s", | |
72 | *state, strerror(-k)); | |
73 | if (r == 0) | |
74 | r = k; | |
75 | ||
76 | fclose(f); | |
77 | f = fopen("/sys/power/state", "we"); | |
78 | if (!f) { | |
79 | log_error("Failed to open /sys/power/state: %m"); | |
80 | return -errno; | |
81 | } | |
6edd7d0a LP |
82 | } |
83 | ||
19adb8a3 ZJS |
84 | return r; |
85 | } | |
6edd7d0a | 86 | |
19adb8a3 ZJS |
87 | static int execute(char **modes, char **states) { |
88 | char* arguments[4]; | |
89 | int r; | |
90 | FILE *f; | |
91 | const char* note = strappenda("SLEEP=", arg_verb); | |
6524990f | 92 | |
19adb8a3 ZJS |
93 | /* This file is opened first, so that if we hit an error, |
94 | * we can abort before modyfing any state. */ | |
6edd7d0a LP |
95 | f = fopen("/sys/power/state", "we"); |
96 | if (!f) { | |
97 | log_error("Failed to open /sys/power/state: %m"); | |
19adb8a3 | 98 | return -errno; |
6edd7d0a LP |
99 | } |
100 | ||
19adb8a3 ZJS |
101 | /* Configure the hibernation mode */ |
102 | r = write_mode(modes); | |
103 | if (r < 0) | |
104 | return r; | |
105 | ||
6edd7d0a LP |
106 | arguments[0] = NULL; |
107 | arguments[1] = (char*) "pre"; | |
19adb8a3 | 108 | arguments[2] = arg_verb; |
6edd7d0a | 109 | arguments[3] = NULL; |
ddcbc873 | 110 | execute_directory(SYSTEM_SLEEP_PATH, NULL, arguments); |
6edd7d0a | 111 | |
19adb8a3 ZJS |
112 | log_struct(LOG_INFO, |
113 | MESSAGE_ID(SD_MESSAGE_SLEEP_START), | |
114 | "MESSAGE=Suspending system...", | |
115 | note, | |
116 | NULL); | |
117 | ||
118 | r = write_state(f, states); | |
119 | if (r < 0) | |
120 | return r; | |
121 | ||
122 | log_struct(LOG_INFO, | |
123 | MESSAGE_ID(SD_MESSAGE_SLEEP_STOP), | |
124 | "MESSAGE=System resumed.", | |
125 | note, | |
126 | NULL); | |
eb267289 | 127 | |
6edd7d0a | 128 | arguments[1] = (char*) "post"; |
ddcbc873 | 129 | execute_directory(SYSTEM_SLEEP_PATH, NULL, arguments); |
6edd7d0a | 130 | |
19adb8a3 ZJS |
131 | return r; |
132 | } | |
6edd7d0a | 133 | |
19adb8a3 ZJS |
134 | static int help(void) { |
135 | printf("%s COMMAND\n\n" | |
136 | "Suspend the system, hibernate the system, or both.\n\n" | |
137 | "Commands:\n" | |
138 | " -h --help Show this help and exit\n" | |
139 | " --version Print version string and exit\n" | |
140 | " suspend Suspend the system\n" | |
141 | " hibernate Hibernate the system\n" | |
142 | " hybrid-sleep Both hibernate and suspend the system\n" | |
143 | , program_invocation_short_name | |
144 | ); | |
145 | ||
146 | return 0; | |
147 | } | |
6edd7d0a | 148 | |
19adb8a3 ZJS |
149 | static int parse_argv(int argc, char *argv[]) { |
150 | enum { | |
151 | ARG_VERSION = 0x100, | |
152 | }; | |
153 | ||
154 | static const struct option options[] = { | |
155 | { "help", no_argument, NULL, 'h' }, | |
156 | { "version", no_argument, NULL, ARG_VERSION }, | |
157 | { NULL, 0, NULL, 0 } | |
158 | }; | |
159 | ||
160 | int c; | |
161 | ||
162 | assert(argc >= 0); | |
163 | assert(argv); | |
164 | ||
165 | while ((c = getopt_long(argc, argv, "+h", options, NULL)) >= 0) | |
166 | switch(c) { | |
167 | case 'h': | |
168 | help(); | |
169 | return 0 /* done */; | |
170 | ||
171 | case ARG_VERSION: | |
172 | puts(PACKAGE_STRING); | |
173 | puts(SYSTEMD_FEATURES); | |
174 | return 0 /* done */; | |
175 | ||
176 | case '?': | |
177 | return -EINVAL; | |
178 | ||
179 | default: | |
180 | log_error("Unknown option code %c", c); | |
181 | return -EINVAL; | |
182 | } | |
183 | ||
184 | if (argc - optind != 1) { | |
185 | log_error("Usage: %s COMMAND", | |
186 | program_invocation_short_name); | |
187 | return -EINVAL; | |
188 | } | |
189 | ||
190 | arg_verb = argv[optind]; | |
6edd7d0a | 191 | |
19adb8a3 ZJS |
192 | if (!streq(arg_verb, "suspend") && |
193 | !streq(arg_verb, "hibernate") && | |
194 | !streq(arg_verb, "hybrid-sleep")) { | |
195 | log_error("Unknown command '%s'.", arg_verb); | |
196 | return -EINVAL; | |
197 | } | |
198 | ||
199 | return 1 /* work to do */; | |
200 | } | |
201 | ||
202 | int main(int argc, char *argv[]) { | |
203 | _cleanup_strv_free_ char **modes = NULL, **states = NULL; | |
204 | int r; | |
205 | ||
206 | log_set_target(LOG_TARGET_AUTO); | |
207 | log_parse_environment(); | |
208 | log_open(); | |
209 | ||
210 | r = parse_argv(argc, argv); | |
211 | if (r <= 0) | |
212 | goto finish; | |
213 | ||
214 | r = parse_sleep_config(arg_verb, &modes, &states); | |
215 | if (r < 0) | |
216 | goto finish; | |
217 | ||
218 | r = execute(modes, states); | |
219 | ||
220 | finish: | |
221 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; | |
6edd7d0a | 222 | } |