src/servers/launch/InitRealTimeClockJob.cpp

   1 /*
   2  * Copyright 2015, Axel Dörfler, axeld@pinc-software.de.
   3  * Copyright 2004, Jérôme Duval, jerome.duval@free.fr.
   4  * Copyright 2010, 2012, Oliver Tappe <zooey@hirschkaefer.de>
   5  * Distributed under the terms of the MIT License.
   6  */
   7
   8
   9 //! Initialize real time clock, and time zone offset
  10
  11
  12 #include "InitRealTimeClockJob.h"
  13
  14 #include <stdio.h>
  15
  16 #include <File.h>
  17 #include <FindDirectory.h>
  18 #include <Message.h>
  19 #include <TimeZone.h>
  20
  21 #include <syscalls.h>
  22
  23
  24 using BSupportKit::BJob;
  25
  26
  27 InitRealTimeClockJob::InitRealTimeClockJob()
  28         :
  29         BJob("init real time clock")
  30 {
  31 }
  32
  33
  34 status_t
  35 InitRealTimeClockJob::Execute()
  36 {
  37         BPath path;
  38         status_t status = find_directory(B_USER_SETTINGS_DIRECTORY, &path);
  39         if (status == B_OK) {
  40                 _SetRealTimeClockIsGMT(path);
  41                 _SetTimeZoneOffset(path);
  42         }
  43         return status;
  44 }
  45
  46
  47 void
  48 InitRealTimeClockJob::_SetRealTimeClockIsGMT(BPath path) const
  49 {
  50         path.Append("RTC_time_settings");
  51         BFile file;
  52         status_t status = file.SetTo(path.Path(), B_READ_ONLY);
  53         if (status != B_OK) {
  54                 fprintf(stderr, "Can't open RTC settings file\n");
  55                 return;
  56         }
  57
  58         char buffer[10];
  59         ssize_t bytesRead = file.Read(buffer, sizeof(buffer));
  60         if (bytesRead < 0) {
  61                 fprintf(stderr, "Unable to read RTC settings file\n");
  62                 return;
  63         }
  64         bool isGMT = strncmp(buffer, "local", 5) != 0;
  65
  66         _kern_set_real_time_clock_is_gmt(isGMT);
  67         printf("RTC stores %s time.\n", isGMT ? "GMT" : "local" );
  68 }
  69
  70
  71 void
  72 InitRealTimeClockJob::_SetTimeZoneOffset(BPath path) const
  73 {
  74         path.Append("Time settings");
  75         BFile file;
  76         status_t status = file.SetTo(path.Path(), B_READ_ONLY);
  77         if (status != B_OK) {
  78                 fprintf(stderr, "Can't open Time settings file\n");
  79                 return;
  80         }
  81
  82         BMessage settings;
  83         status = settings.Unflatten(&file);
  84         if (status != B_OK) {
  85                 fprintf(stderr, "Unable to parse Time settings file\n");
  86                 return;
  87         }
  88         BString timeZoneID;
  89         if (settings.FindString("timezone", &timeZoneID) != B_OK) {
  90                 fprintf(stderr, "No timezone found\n");
  91                 return;
  92         }
  93         int32 timeZoneOffset = BTimeZone(timeZoneID.String()).OffsetFromGMT();
  94
  95         _kern_set_timezone(timeZoneOffset, timeZoneID.String(),
  96                 timeZoneID.Length());
  97         printf("timezone is %s, offset is %" B_PRId32 " seconds from GMT.\n",
  98                 timeZoneID.String(), timeZoneOffset);
  99 }