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
InitRealTimeClockJob()27 InitRealTimeClockJob::InitRealTimeClockJob()
28 :
29 BJob("init real time clock")
30 {
31 }
32
33
34 status_t
Execute()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
_SetRealTimeClockIsGMT(BPath path) const48 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
_SetTimeZoneOffset(BPath path) const72 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 }
100