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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 | ||
6edd7d0a | 23 | #include <errno.h> |
19adb8a3 | 24 | #include <getopt.h> |
3f6fd1ba | 25 | #include <stdio.h> |
6edd7d0a | 26 | |
aa62a893 | 27 | #include "sd-messages.h" |
3f6fd1ba LP |
28 | |
29 | #include "def.h" | |
a5c32cff | 30 | #include "fileio.h" |
3f6fd1ba | 31 | #include "log.h" |
19adb8a3 | 32 | #include "sleep-config.h" |
07630cea | 33 | #include "string-util.h" |
3f6fd1ba LP |
34 | #include "strv.h" |
35 | #include "util.h" | |
19adb8a3 ZJS |
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) { | |
aa62a893 LP |
44 | int k; |
45 | ||
4c1fc3e4 | 46 | k = write_string_file("/sys/power/disk", *mode, 0); |
19adb8a3 ZJS |
47 | if (k == 0) |
48 | return 0; | |
aa62a893 | 49 | |
c33b3297 MS |
50 | log_debug_errno(k, "Failed to write '%s' to /sys/power/disk: %m", |
51 | *mode); | |
19adb8a3 ZJS |
52 | if (r == 0) |
53 | r = k; | |
54 | } | |
6edd7d0a | 55 | |
19adb8a3 | 56 | if (r < 0) |
c33b3297 | 57 | log_error_errno(r, "Failed to write mode to /sys/power/disk: %m"); |
6edd7d0a | 58 | |
19adb8a3 ZJS |
59 | return r; |
60 | } | |
6edd7d0a | 61 | |
2fd069b1 | 62 | static int write_state(FILE **f, char **states) { |
19adb8a3 ZJS |
63 | char **state; |
64 | int r = 0; | |
65 | ||
66 | STRV_FOREACH(state, states) { | |
67 | int k; | |
68 | ||
40beecdb | 69 | k = write_string_stream(*f, *state, true); |
19adb8a3 ZJS |
70 | if (k == 0) |
71 | return 0; | |
c33b3297 MS |
72 | log_debug_errno(k, "Failed to write '%s' to /sys/power/state: %m", |
73 | *state); | |
19adb8a3 ZJS |
74 | if (r == 0) |
75 | r = k; | |
76 | ||
2fd069b1 ZJS |
77 | fclose(*f); |
78 | *f = fopen("/sys/power/state", "we"); | |
4a62c710 MS |
79 | if (!*f) |
80 | return log_error_errno(errno, "Failed to open /sys/power/state: %m"); | |
6edd7d0a LP |
81 | } |
82 | ||
19adb8a3 ZJS |
83 | return r; |
84 | } | |
6edd7d0a | 85 | |
19adb8a3 | 86 | static int execute(char **modes, char **states) { |
e2cc6eca LP |
87 | |
88 | char *arguments[] = { | |
89 | NULL, | |
90 | (char*) "pre", | |
91 | arg_verb, | |
92 | NULL | |
93 | }; | |
e801700e | 94 | static const char* const dirs[] = {SYSTEM_SLEEP_PATH, NULL}; |
e2cc6eca | 95 | |
19adb8a3 | 96 | int r; |
2fd069b1 | 97 | _cleanup_fclose_ FILE *f = NULL; |
6524990f | 98 | |
19adb8a3 | 99 | /* This file is opened first, so that if we hit an error, |
09692409 | 100 | * we can abort before modifying any state. */ |
6edd7d0a | 101 | f = fopen("/sys/power/state", "we"); |
4a62c710 MS |
102 | if (!f) |
103 | return log_error_errno(errno, "Failed to open /sys/power/state: %m"); | |
6edd7d0a | 104 | |
19adb8a3 ZJS |
105 | /* Configure the hibernation mode */ |
106 | r = write_mode(modes); | |
107 | if (r < 0) | |
108 | return r; | |
109 | ||
e801700e | 110 | execute_directories(dirs, DEFAULT_TIMEOUT_USEC, arguments); |
6edd7d0a | 111 | |
19adb8a3 | 112 | log_struct(LOG_INFO, |
e2cc6eca LP |
113 | LOG_MESSAGE_ID(SD_MESSAGE_SLEEP_START), |
114 | LOG_MESSAGE("Suspending system..."), | |
115 | "SLEEP=%s", arg_verb, | |
19adb8a3 ZJS |
116 | NULL); |
117 | ||
2fd069b1 | 118 | r = write_state(&f, states); |
19adb8a3 ZJS |
119 | if (r < 0) |
120 | return r; | |
121 | ||
122 | log_struct(LOG_INFO, | |
e2cc6eca | 123 | LOG_MESSAGE_ID(SD_MESSAGE_SLEEP_STOP), |
a5ccdb98 | 124 | LOG_MESSAGE("System resumed."), |
e2cc6eca | 125 | "SLEEP=%s", arg_verb, |
19adb8a3 | 126 | NULL); |
eb267289 | 127 | |
6edd7d0a | 128 | arguments[1] = (char*) "post"; |
e801700e | 129 | execute_directories(dirs, DEFAULT_TIMEOUT_USEC, arguments); |
6edd7d0a | 130 | |
19adb8a3 ZJS |
131 | return r; |
132 | } | |
6edd7d0a | 133 | |
601185b4 | 134 | static void help(void) { |
19adb8a3 ZJS |
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" | |
601185b4 | 143 | , program_invocation_short_name); |
19adb8a3 | 144 | } |
6edd7d0a | 145 | |
19adb8a3 ZJS |
146 | static int parse_argv(int argc, char *argv[]) { |
147 | enum { | |
148 | ARG_VERSION = 0x100, | |
149 | }; | |
150 | ||
151 | static const struct option options[] = { | |
152 | { "help", no_argument, NULL, 'h' }, | |
153 | { "version", no_argument, NULL, ARG_VERSION }, | |
eb9da376 | 154 | {} |
19adb8a3 ZJS |
155 | }; |
156 | ||
157 | int c; | |
158 | ||
159 | assert(argc >= 0); | |
160 | assert(argv); | |
161 | ||
601185b4 | 162 | while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) |
19adb8a3 ZJS |
163 | switch(c) { |
164 | case 'h': | |
601185b4 ZJS |
165 | help(); |
166 | return 0; /* done */ | |
19adb8a3 ZJS |
167 | |
168 | case ARG_VERSION: | |
3f6fd1ba | 169 | return version(); |
19adb8a3 ZJS |
170 | |
171 | case '?': | |
172 | return -EINVAL; | |
173 | ||
174 | default: | |
eb9da376 | 175 | assert_not_reached("Unhandled option"); |
19adb8a3 ZJS |
176 | } |
177 | ||
178 | if (argc - optind != 1) { | |
179 | log_error("Usage: %s COMMAND", | |
180 | program_invocation_short_name); | |
181 | return -EINVAL; | |
182 | } | |
183 | ||
184 | arg_verb = argv[optind]; | |
6edd7d0a | 185 | |
19adb8a3 ZJS |
186 | if (!streq(arg_verb, "suspend") && |
187 | !streq(arg_verb, "hibernate") && | |
188 | !streq(arg_verb, "hybrid-sleep")) { | |
189 | log_error("Unknown command '%s'.", arg_verb); | |
190 | return -EINVAL; | |
191 | } | |
192 | ||
193 | return 1 /* work to do */; | |
194 | } | |
195 | ||
196 | int main(int argc, char *argv[]) { | |
197 | _cleanup_strv_free_ char **modes = NULL, **states = NULL; | |
198 | int r; | |
199 | ||
200 | log_set_target(LOG_TARGET_AUTO); | |
201 | log_parse_environment(); | |
202 | log_open(); | |
203 | ||
204 | r = parse_argv(argc, argv); | |
205 | if (r <= 0) | |
206 | goto finish; | |
207 | ||
208 | r = parse_sleep_config(arg_verb, &modes, &states); | |
209 | if (r < 0) | |
210 | goto finish; | |
211 | ||
212 | r = execute(modes, states); | |
213 | ||
214 | finish: | |
215 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; | |
6edd7d0a | 216 | } |