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 #include "fileio.h"
  31
  32 int main(int argc, char *argv[]) {
  33         const char *verb;
  34         char* arguments[4];
  35         int r;
  36         FILE *f;
  37
  38         log_set_target(LOG_TARGET_AUTO);
  39         log_parse_environment();
  40         log_open();
  41
  42         if (argc != 2) {
  43                 log_error("Invalid number of arguments.");
  44                 r = -EINVAL;
  45                 goto finish;
  46         }
  47
  48         if (streq(argv[1], "suspend"))
  49                 verb = "mem";
  50         else if (streq(argv[1], "hibernate") || streq(argv[1], "hybrid-sleep"))
  51                 verb = "disk";
  52         else {
  53                 log_error("Unknown action '%s'.", argv[1]);
  54                 r = -EINVAL;
  55                 goto finish;
  56         }
  57
  58         /* Configure the hibernation mode */
  59         if (streq(argv[1], "hibernate")) {
  60                 if (write_string_file("/sys/power/disk", "platform") < 0)
  61                         write_string_file("/sys/power/disk", "shutdown");
  62         } else if (streq(argv[1], "hybrid-sleep")) {
  63                 if (write_string_file("/sys/power/disk", "suspend") < 0)
  64                         if (write_string_file("/sys/power/disk", "platform") < 0)
  65                                 write_string_file("/sys/power/disk", "shutdown");
  66         }
  67
  68         f = fopen("/sys/power/state", "we");
  69         if (!f) {
  70                 log_error("Failed to open /sys/power/state: %m");
  71                 r = -errno;
  72                 goto finish;
  73         }
  74
  75         arguments[0] = NULL;
  76         arguments[1] = (char*) "pre";
  77         arguments[2] = argv[1];
  78         arguments[3] = NULL;
  79         execute_directory(SYSTEM_SLEEP_PATH, NULL, arguments);
  80
  81         if (streq(argv[1], "suspend"))
  82                 log_struct(LOG_INFO,
  83                            MESSAGE_ID(SD_MESSAGE_SLEEP_START),
  84                            "MESSAGE=Suspending system...",
  85                            "SLEEP=suspend",
  86                            NULL);
  87         else if (streq(argv[1], "hibernate"))
  88                 log_struct(LOG_INFO,
  89                            MESSAGE_ID(SD_MESSAGE_SLEEP_START),
  90                            "MESSAGE=Hibernating system...",
  91                            "SLEEP=hibernate",
  92                            NULL);
  93         else
  94                 log_struct(LOG_INFO,
  95                            MESSAGE_ID(SD_MESSAGE_SLEEP_START),
  96                            "MESSAGE=Hibernating and suspending system...",
  97                            "SLEEP=hybrid-sleep",
  98                            NULL);
  99
 100         fputs(verb, f);
 101         fputc('\n', f);
 102         fflush(f);
 103
 104         r = ferror(f) ? -errno : 0;
 105
 106         if (streq(argv[1], "suspend"))
 107                 log_struct(LOG_INFO,
 108                            MESSAGE_ID(SD_MESSAGE_SLEEP_STOP),
 109                            "MESSAGE=System resumed.",
 110                            "SLEEP=suspend",
 111                            NULL);
 112         else
 113                 log_struct(LOG_INFO,
 114                            MESSAGE_ID(SD_MESSAGE_SLEEP_STOP),
 115                            "MESSAGE=System thawed.",
 116                            "SLEEP=hibernate",
 117                            NULL);
 118
 119         arguments[1] = (char*) "post";
 120         execute_directory(SYSTEM_SLEEP_PATH, NULL, arguments);
 121
 122         fclose(f);
 123
 124 finish:
 125
 126         return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
 127
 128 }