Again C++ question

[Muhammad Rizwan]

The only thing is i want to open the file and want a file descriptor to
return me back, so that i 'll able to pass it to fcntl(), which allows
better concurrency management. How i can do that?
Is ofstream::open return any file descriptor, i am it does not. Can you
tell me how can i access the file descriptor using ofstream::open?

Any idea?

Thanks 

On Mon, 2005-03-28 at 18:17, Claudiu ANGHEL wrote:
> You are mixing C++ streams with C file libraries. You should consider 
> ofstream::open. In c++ reference I do not find the constructor 
> ofstream(int) but on msdn yes (non standard feature?!?!).
> It is possible that was an already deprecated feature and gcc discarded 
> it. Noting to do with kdevelop but gcc.
> 
> Muhammad Rizwan wrote:
> 
> >I am getting the following errors while compiling the code with adding
> >#include <fstream> for file handling:
> >
> >*/home/hc7/chcmanager/src/CTCPServer.cpp:76: error: invalid conversion
> >from `int ' to `const char*' 
> >*/home/hc7/chcmanager/src/CTCPServer.cpp:76: error: initializing
> >argument 1 of `std::basic_ofstream<_CharT,
> >_Traits>::basic_ofstream(const char*, std::_Ios_Openmode) [with _CharT =
> >char, _Traits = std::char_traits<char>]'
> >
> >Any idea?
> >
> >Regards,
> >
> >
> >On Sat, 2005-03-26 at 22:12, Andreas Pakulat wrote:
> >  
> >
> >>On 26.Mär 2005 - 19:37:47, Muhammad Rizwan wrote:
> >>    
> >>
> >>>I was using kdevelop 2.XX one month ago, and write some code related to
> >>>file handling as:
> >>>
> >>>	int fd;
> >>>	if( (fd = open("file.txt", O_WRONLY | O_CREAT, 0640 ) == -1 )
> >>>	{
> >>>		Logging(strerror(errno), 0, ConfigData.Folder);
> >>>		return(-1);
> >>>	}
> >>>	struct flock lockp;
> >>>	lockp.l_type = F_WRLCK;
> >>>	lockp.l_whence = SEEK_SET;
> >>>	lockp.l_start = 0;
> >>>	lockp.l_len = 0;
> >>>	if( fcntl (fd, F_SETLK, &lockp) == -1 )
> >>>	{
> >>>		Logging(strerror(errno), 0, ConfigData.InsFolder);
> >>>		close(fd);
> >>>		return(-1);
> >>>	}
> >>>	ofstream outFile(fd);
> >>>	outFile << "text here";
> >>>	close(fd);
> >>>
> >>>I was compiling this program successfully in kdevelop 2.XX, but now i
> >>>have updated my kdevelop version to 3.0 and i am getting errors for file
> >>>descriptors i.e. fd.
> >>>      
> >>>
> >>What errors specifically? I guess nobody can help you here without the
> >>exact error messages....
> >>
> >>    
> >>
> >>>Now which function should i use to open file which 'll return me file
> >>>descriptor, so that i 'll be able to lock file by using fcntl(). Because
> >>>fcntl() accepts file descriptor (i.e. fd) as:
> >>>      
> >>>
> >>open is a C-functions so you should checkt that you're including the
> >>proper C-header and link against libc...
> >>
> >>Andreas
> >>    
> >>
> >
> >
> >-
> >to unsubscribe from this list send an email to kdevelop-request at kdevelop.org with the following body:
> >unsubscribe �your-email-address�
> >
> >
> >  
> >
> 
> 
> -
> to unsubscribe from this list send an email to kdevelop-request at kdevelop.org with the following body:
> unsubscribe your-email-address


-
to unsubscribe from this list send an email to kdevelop-request at kdevelop.org with the following body:
unsubscribe »your-email-address«