BBWin V.12 filesystem epoch time and local time conflict

[Kauffman, Tom]

I think you're looking for something that doesn't exist, unless the windows epoch handling is non-posix. In the Unix/posix environment, the epoch is always UTC and the conversion to local time-zone value occurs as part of the time formatting - there's no such animal as 'local epoch'. I'd look at the system returning these values and make sure the time zone is set correctly.

Tom

-----Original Message-----
From: McGraw, Robert P [mailto:rmcgraw at purdue.edu]
Sent: Tuesday, June 24, 2008 11:46 AM
To: hobbit at hswn.dk
Subject: [hobbit] RE: BBWin V.12 filesystem epoch time and local time conflict



A little more digging and I see


> -----Original Message-----
> From: McGraw, Robert P
> Sent: Tuesday, June 24, 2008 10:40 AM
> To: 'hobbit at hswn.dk'; 'bbwin-users at lists.sourceforge.net'
> Subject: BBWin V.12 filesystem epoch time and local time conflict
>
> I have the [file:] set up in central mode on our BBWin V.12 client and it
> returns the following client data to the Hobbit server.
>
>       [file:c:\Alligate\AAATEST]
>       type:0x00020 (file)
>       mode:777 (not implemented)
>       linkcount:1
>       owner:0 (not implemented)
>       group:0 (not implemented)
>       size:0
>       atime:1214222069 (2008/06/23-11:54:29)
>       ctime:1213796626 (2008/06/18-13:43:46)
>       mtime:1214222069 (2008/06/23-11:54:29)
>
> On my hobbit server hobbit-clients.cfg I have
>
>       FILE c:\Alligate\AAATEST red MTIME<88200
>
> The YYYY/MM/DD-HH:MM:SS atime, ctime and mtime are local time.
>
> During testing I noticed that the red icon would come on before I had
> expected.
>
> I decided to do a little checking and using a web epoch time calculator.
>
> If I enter 2008/06/23-11:54:29 it returns the epoch time of 1214236469,
> which
> does not match mtime epoch time above.
>
> If I enter the epoch mtime 1214222069 I get Mon Jun 23 2008 07:54:29
> GMT-0400 (EDT) which does not match the date.
>
> If I enter epoch time 1214236469 I get Mon Jun 23 2008 11:54:29 GMT-0400
> (EDT)
>
> It seems that the YYYY/MM/DD-HH:MM:SS time is reported in local time and
> the
> epoch time is reported in GMT time which throws things off by four hours.
>
>
> The following is the code in filesystem
>
>   325         reportData << format("type:0x%05x ") %
> handle_file_info.dwFileAttributes;
>   326         if (handle_file_info.dwFileAttributes &
> FILE_ATTRIBUTE_DIRECTORY)
>   327                 reportData << "(dir)" << endl;
>   328         else
>   329                 reportData << "(file)" << endl;
>   330         reportData << "mode:777 (not implemented)" << endl;
>   331         reportData << format("linkcount:%u") %
> handle_file_info.nNumberOfLinks
> << endl;
>   332         reportData << "owner:0 (not implemented)" << endl;
>   333         reportData << "group:0 (not implemented)" << endl;
>   334         reportData << format("size:%lu") % fsize << endl;
>   335         string output;
>   336         GetTimeString(handle_file_info.ftLastAccessTime, output);
>   337         reportData << "atime:" << output << endl;
>   338         GetTimeString(handle_file_info.ftCreationTime, output);
>   339         reportData << "ctime:" << output << endl;
>   340         GetTimeString(handle_file_info.ftLastWriteTime, output);
>   341         reportData << "mtime:" << output << endl;
>   342         fclose(f);
>   343         return true;

GetTimeString is a function in the filesystem code which follows.

bool            AgentFileSystem::GetTimeString(const FILETIME & filetime,
string & output) {
  255   __int64 ftime = (filetime.dwHighDateTime * MAXDWORD) +
filetime.dwLowDateTime;
  256   SYSTEMTIME      fsystime;
  257   FILETIME        floctime;
  258   time_t          epoch;
  259
  260   if (::FileTimeToLocalFileTime(&filetime, &floctime) == 0) {
  261           return false;
  262   }
  263   if (::FileTimeToSystemTime(&floctime, &fsystime) == 0) {
  264           return false;
  265   }
  266   utils::SystemTimeToTime_t(&fsystime, &epoch);
  267   stringstream reportData;
  268   reportData << format("%llu (%02d/%02d/%d-%02d:%02d:%02d)")
  269                                   % (unsigned __int64)epoch
  270                                   % fsystime.wYear
  271                                   % fsystime.wMonth
  272                                   % fsystime.wDay
  273                                   % fsystime.wHour
  274                                   % fsystime.wMinute
  275                                   % fsystime.wSecond;
  276   output = reportData.str();
  277   return true;
  278 }

It seems to me that after line 266 there needs to be a couple lines that
converts the GMT epoch to local epoch.



>
>
> The function GetTimeString seems to be the code that is returning the time
> information. I have not been able to find this code in the BBWin svn so I
> am
> not sure if this is a local function or a system function.
>
> I am not a Window type guy and no very little about such things. Can a
> super
> duper window type person peruse this and see what they can find.
>
> Tanks
>
>
>
> Thanks
>
> Robert
>
>
>
>
>
> --------------------------------------------------------------------
> Robert P. McGraw, Jr.
> Manager, Computer System                 EMAIL: rmcgraw at purdue.edu
> Purdue University                         ROOM: MATH-807
> Department of Mathematics                PHONE: (765) 494-6055
> 150 N. University Street
> West Lafayette, IN 47907-2067

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