tellg() returning -1 at the end of file - C / C++ / MFC Discussion Boards

Is there a syslog library for native C++ which runs under Windows?

Marco Bertschi18-Mar-13 22:14

18-Mar-13 22:14

Hi guys

~~I am looking for a C++ library like syslog-ng[^] but with the possibility to run under Windows (syslog-ng needs a POSIX system ). Has anyone an idea or a suggestion?~~
Not required anymore, I simply took a hour-long Google search on me and made my Windows POSIX-compatible Sniff | :^)

[^] . Since syslog-ng needs POSIX I suppose it will run well and smooth...

Edit: Added "syslog" to the title.

cheers
Marco Bertschi

Software Developer & Founder SMGT Web-Portal
CP Profile | Twitter | Facebook | SMGT Web-Portal

FizzBuzz - Gary Wheeler

Re: Is there a syslog library for native C++ which runs under Windows?

pasztorpisti19-Mar-13 2:02

pasztorpisti

19-Mar-13 2:02

There are POSIX emulation layers for windows, for example cygwin. Search for cygwin + syslog-ng.

Re: Is there a syslog library for native C++ which runs under Windows?

Marco Bertschi19-Mar-13 5:15

Marco Bertschi

19-Mar-13 5:15

Thank you again for your suggestion, instead of cygwin I ended up making my Windows 7 POSIX compatible with Interix[^].

cheers
Marco Bertschi

Software Developer & Founder SMGT Web-Portal
CP Profile | Twitter | Facebook | SMGT Web-Portal

FizzBuzz - Gary Wheeler

Re: Is there a syslog library for native C++ which runs under Windows?

pasztorpisti19-Mar-13 12:43

pasztorpisti

19-Mar-13 12:43

You are welcome. I suggested cygwin just because its popularity but you have options - thats always good! Smile | :)

Re: Is there a syslog library for native C++ which runs under Windows?

Albert Holguin19-Mar-13 5:19

Albert Holguin

19-Mar-13 5:19

FYI... if you're required to export your application to end users, Cygwin might still be an easier option. You may be surprised at the number of commercial applications that rely on Cygwin to run on Windows.

Re: Is there a syslog library for native C++ which runs under Windows?

Marco Bertschi19-Mar-13 5:46

Marco Bertschi

19-Mar-13 5:46

Hi Albert

thank you for the information, but I am talking about the controller software of this medical diagnostics instrument[^] (pointed that not well enough out, sorry). Because of the regulations in the market we are going to do a hardening process on the OS anyways and can set up the image anyway we want to, so installing the kernel patch is no problem since we decide what the customers OS will look like. And using the kernel patch we get a faster response time anyways, so this is the way to go for us.
But thank you very much for the additional info.

cheers
Marco Bertschi

Software Developer & Founder SMGT Web-Portal
CP Profile | Twitter | Facebook | SMGT Web-Portal

FizzBuzz - Gary Wheeler

modified 19-Mar-13 11:55am.

Re: Is there a syslog library for native C++ which runs under Windows?

Albert Holguin19-Mar-13 6:31

Albert Holguin

19-Mar-13 6:31

At least you have options... Smile | :)

tellg() returning -1 at the end of file

Meer Sadaf Naeem18-Mar-13 17:57

Meer Sadaf Naeem

18-Mar-13 17:57

hello
i am trying to write a program that counts the no. of records in a file by placing the get pointer at the end of file and using tellg() function to get the pointer position and dividing the no. of bytes with the size of one record to get the no. of total records

but when i write
file.seekg(0,ios::end);
and then inquire the position of get pointer
file.tellg();
the result that i am getting is -1.
please tell me what am i doing wrong?

Re: tellg() returning -1 at the end of file

Richard MacCutchan18-Mar-13 23:24

Richard MacCutchan

18-Mar-13 23:24

Check the documentation[^] for the reason for getting a -1 return.

Use the best guess

Re: tellg() returning -1 at the end of file

David Crow19-Mar-13 3:02

David Crow

19-Mar-13 3:02

Is seekg() succeeding?

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An Invalid Exception Handler Routine Has Been Detected

Richard Andrew x6418-Mar-13 4:03

Richard Andrew x64

18-Mar-13 4:03

Does that error mean the stack has become unbalanced?

I get that error immediately after it returns from a call to VirtualProtect().

I have identical code in another program that does not cause this error, and I can't figure out the difference between the two programs.

What exactly does that error mean is going on?

The difficult we do right away...
...the impossible takes slightly longer.

Re: An Invalid Exception Handler Routine Has Been Detected

Stephen Hewitt18-Mar-13 4:46

Stephen Hewitt

18-Mar-13 4:46

I'd guess the stack has been corrupted (buffer overrun in a stack based variable, for example).

Steve

Re: An Invalid Exception Handler Routine Has Been Detected

Richard Andrew x6418-Mar-13 11:57

Richard Andrew x64

18-Mar-13 11:57

Thanks, your clue led me to the solution. I was attempting to remove the execute privilege from a page of memory that was currently executing! D'Oh! | :doh:

So instead of PAGE_WRITECOPY, I changed it to PAGE_EXECUTE_WRITECOPY, and all is well.

The difficult we do right away...
...the impossible takes slightly longer.

How to set values in CPageSetupDialog?

Le@rner17-Mar-13 21:32

Le@rner

17-Mar-13 21:32

hi all,

i want to set values to CPageSetupDialog,before open this dialog

like: paper size,sorce,orientation and margin.

how can i do this thanks.

thanks.

Re: How to set values in CPageSetupDialog?

Richard MacCutchan17-Mar-13 22:10

Richard MacCutchan

17-Mar-13 22:10

Use the m_psd member of the CPageSetupDialog[^].

Use the best guess

Re: How to set values in CPageSetupDialog?

Le@rner17-Mar-13 22:41

Le@rner

17-Mar-13 22:41

what field use to set source value?

Re: How to set values in CPageSetupDialog?

Richard MacCutchan17-Mar-13 23:48

Richard MacCutchan

17-Mar-13 23:48

I gave you a link to the documentation, you need to go and study it to decide which items you are interested in.

Use the best guess

Re: How to set values in CPageSetupDialog?

Coder Block18-Mar-13 2:55

Coder Block

18-Mar-13 2:55

may be this help u... Smile | :)

u may have dialog class like,

C++

CPageSetupDialog abc;
//Conding to set values.
abc.papersize = 10;
abc.sorce = "ACC";
abc.margin = 44;
//ETC.
//And then modal it..Like,
if(abc.DoModal() == IKOK)
{
//Success;
}else
{
//Fail..
}

Re: How to set values in CPageSetupDialog?

Le@rner19-Mar-13 2:45

Le@rner

19-Mar-13 2:45

Coder Block wrote:
CPageSetupDialog abc;
//Conding to set values.
abc.papersize = 10;
abc.sorce = "ACC";
abc.margin = 44;
//ETC.
//And then modal it..Like,
if(abc.DoModal() == IKOK)
{
//Success;
}else
{
//Fail..
}

gives error

error C2039: 'margin' : is not a member of 'CPageSetupDialog'	
error C2039: 'papersize' : is not a member of 'CPageSetupDialog'
error C2039: 'sorce' : is not a member of 'CPageSetupDialog'

Re: How to set values in CPageSetupDialog?

David Crow19-Mar-13 3:05

David Crow

19-Mar-13 3:05

Read the docs, PLEASE!

abc.m_psd.ptPaperSize = 10;
abc.m_psd.rtMargin = 44;
...

Re: How to set values in CPageSetupDialog?

Coder Block24-Mar-13 23:10

Coder Block

24-Mar-13 23:10

As usual declare all this in .h file of CPageSetupDialog..

Locating a function address with the debugger

Richard Andrew x6417-Mar-13 11:37

Richard Andrew x64

17-Mar-13 11:37

I need to debug a program for which I do not have the source code.

I want to place a breakpoint at the CreateFile() Win32 API.

I have told Visual Studio to load the symbols for KernelBase.dll and Kernel32.dll .

Now how can I tell the Disassembly View to take me to the location of CreateFile()?

Thanks in advance.

The difficult we do right away...
...the impossible takes slightly longer.

Re: Locating a function address with the debugger

pasztorpisti17-Mar-13 14:28

pasztorpisti

17-Mar-13 14:28

Visual Studio is not the right tool for reverse engineering. Use IDA Pro or OllyDbg. IDA Pro is damn expensive while OllyDbg is free. A lot of reverse engineering guys use these.

Re: Locating a function address with the debugger

Richard Andrew x6417-Mar-13 16:47

Richard Andrew x64

17-Mar-13 16:47

Thanks, I'll look into both of those.

The difficult we do right away...
...the impossible takes slightly longer.

Re: Locating a function address with the debugger

Stephen Hewitt17-Mar-13 16:42

Stephen Hewitt

17-Mar-13 16:42

I'd use WinDing, set up a symbol server and place a breakpoint directly on CreateFile. No need for disassembling.

Steve

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