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Message from discussion Strange Behaviour in finding Size of a File
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Greg Martin  
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 More options Nov 9 2012, 11:59 am
Newsgroups: comp.lang.c
From: Greg Martin <g...@softsprocket.com>
Date: Fri, 09 Nov 2012 08:59:20 -0800
Local: Fri, Nov 9 2012 11:59 am
Subject: Re: Strange Behaviour in finding Size of a File
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On 12-11-08 11:09 PM, felix wrote:

> This method was written to create new Log File, when the size of the Log File reaches a max size defined by user [10MB in our case]. Here is the code snippet that does this check:

> //-- Code starts here : --

> static size_t LogSize = 1048576;
> bool CreateNewLogs = false;

> if ( stat ( logFile, &results ) == 0 )
> {
>    if ( results.st_size > LogSize )
>    {
>            CreateNewLogs = true;
>    }
> }
> //-- Code ends here   : --

> It is strange that the condition got satisfied when results.st_size = 2589116.
> And we are sure that the size of the data that is written is between 50 to 100 bytes in one operation. And this check is done before writing into the LogFile.

> I am not sure if I am missing anything in our understanding of the stat function. Any inputs or pointers on this regard will be really Helpful.

> Thanks in advance, and please let me know if any other information is required.

> --
> Felix

I would think it strange if I knew for sure that the function got called
before the write in every place that the file was possibly being written
to and that there weren't multiple process/threads that could write to it.

 
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