src/sleep/sleep.c

   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
   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
  22 #include <stdio.h>
  23 #include <errno.h>
  24 #include <string.h>
  25
  26 #include "log.h"
  27 #include "util.h"
  28 #include "systemd/sd-id128.h"
  29 #include "systemd/sd-messages.h"
  30
  31 int main(int argc, char *argv[]) {
  32         const char *verb;
  33         char* arguments[4];
  34         int r;
  35         FILE *f;
  36
  37         log_set_target(LOG_TARGET_AUTO);
  38         log_parse_environment();
  39         log_open();
  40
  41         if (argc != 2) {
  42                 log_error("Invalid number of arguments.");
  43                 r = -EINVAL;
  44                 goto finish;
  45         }
  46
  47         if (streq(argv[1], "suspend"))
  48                 verb = "mem";
  49         else if (streq(argv[1], "hibernate") || streq(argv[1], "hybrid-sleep"))
  50                 verb = "disk";
  51         else {
  52                 log_error("Unknown action '%s'.", argv[1]);
  53                 r = -EINVAL;
  54                 goto finish;
  55         }
  56
  57         /* Configure the hibernation mode */
  58         if (streq(argv[1], "hibernate")) {
  59                 if (write_one_line_file("/sys/power/disk", "platform") < 0)
  60                         write_one_line_file("/sys/power/disk", "shutdown");
  61         } else if (streq(argv[1], "hybrid-sleep")) {
  62                 if (write_one_line_file("/sys/power/disk", "suspend") < 0)
  63                         if (write_one_line_file("/sys/power/disk", "platform") < 0)
  64                                 write_one_line_file("/sys/power/disk", "shutdown");
  65         }
  66
  67         f = fopen("/sys/power/state", "we");
  68         if (!f) {
  69                 log_error("Failed to open /sys/power/state: %m");
  70                 r = -errno;
  71                 goto finish;
  72         }
  73
  74         arguments[0] = NULL;
  75         arguments[1] = (char*) "pre";
  76         arguments[2] = argv[1];
  77         arguments[3] = NULL;
  78         execute_directory(SYSTEM_SLEEP_PATH, NULL, arguments);
  79
  80         if (streq(argv[1], "suspend"))
  81                 log_struct(LOG_INFO,
  82                            MESSAGE_ID(SD_MESSAGE_SLEEP_START),
  83                            "MESSAGE=Suspending system...",
  84                            "SLEEP=suspend",
  85                            NULL);
  86         else if (streq(argv[1], "hibernate"))
  87                 log_struct(LOG_INFO,
  88                            MESSAGE_ID(SD_MESSAGE_SLEEP_START),
  89                            "MESSAGE=Hibernating system...",
  90                            "SLEEP=hibernate",
  91                            NULL);
  92         else
  93                 log_struct(LOG_INFO,
  94                            MESSAGE_ID(SD_MESSAGE_SLEEP_START),
  95                            "MESSAGE=Hibernating and suspending system...",
  96                            "SLEEP=hybrid-sleep",
  97                            NULL);
  98
  99         fputs(verb, f);
 100         fputc('\n', f);
 101         fflush(f);
 102
 103         r = ferror(f) ? -errno : 0;
 104
 105         if (streq(argv[1], "suspend"))
 106                 log_struct(LOG_INFO,
 107                            MESSAGE_ID(SD_MESSAGE_SLEEP_STOP),
 108                            "MESSAGE=System resumed.",
 109                            "SLEEP=suspend",
 110                            NULL);
 111         else
 112                 log_struct(LOG_INFO,
 113                            MESSAGE_ID(SD_MESSAGE_SLEEP_STOP),
 114                            "MESSAGE=System thawed.",
 115                            "SLEEP=hibernate",
 116                            NULL);
 117
 118         arguments[1] = (char*) "post";
 119         execute_directory(SYSTEM_SLEEP_PATH, NULL, arguments);
 120
 121         fclose(f);
 122
 123 finish:
 124
 125         return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
 126
 127 }