Date: 3 Feb 2006 20:20:42 -0000
Message-ID: <20060203202042.9521.qmail@webmail45.rediffmail.com>
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From: "Amruta" <amruta_t25 AT rediffmail DOT com>
Reply-To: "Amruta" <amruta_t25 AT rediffmail DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: Re: Driftnet for Windows
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koool, that explains much better...thanks a lot.


On Fri, 03 Feb 2006 Eric Blake wrote :
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>Re-adding cygwin mailing list: 
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>Top-posting reformatted: http://cygwin.com/acronyms/#TOFU
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> >> I am new to Cygwin. I have a very basic question.
> >> There is a tool Driftnet available only for Unix. I want to 
>write it
> > for
> >> I Windows making a few improvements as a part of my Master's 
>thesis. I
> >> am confused here, can cygwin provide me some files like 
>netinet/tcp.h
> >> etc. available in Linux (which are used for coding driftnet) 
>in
> > Windows?
> >
> > Yes, cygwin has <netinet/tcp.h>.  In fact, if you have source 
>code that
> > compiles under Linux, it is often the case that the same 
>source code will
> > compile under cygwin with minimal tweaking.
> >
>
>According to Amruta on 2/3/2006 12:49 AM:
> > But does that mean to run this software everybody will have to 
>download
> > cygwin on their machine?
>
>If you compile against cygwin, yes.  There are other projects out 
>there,
>such as mingw, which allow native compilation that does not 
>depend on
>cygwin1.dll (in fact, cygwin's gcc comes with a -mno-cygwin flag 
>to select
>mingw compilation).  However, mingw cannot support as many 
>headers as
>cygwin, because it is cygwin doing the translation from POSIX 
>semantics to
>windows.  Discussing mingw compilation is somewhat off-topic on 
>this list,
>as it more properly belongs on the mingw list.
>
> > Is there any way you can simply keep the required files (say 
>in my case
> > netinet/tcp.h) on your system and don't need to keep entire 
>cygwin package.
>
>No - headers are provided by the system for a reason - compiling 
>against
>headers means that your program must run on the system that 
>provided those
>headers.  Windows doesn't provide <netinet/tcp.h> because 
>Microsoft
>doesn't believe in following standards such as POSIX.  Your 
>choices are to
>do some heavy porting to what windows actually does provide, or 
>else to
>let cygwin do the porting and introduce a dependency on cygwin.
>
> > Basically it doesn't make sense if people have to install 100s 
>of MB of
> > files for running the tool.
>
>100s of MB?  I beg to differ.  A minimal cygwin installation is 
>just a few
>megabytes; cygwin1.dll itself is currently 1.8 meg (actually, I 
>haven't
>done a minimal install lately to see how much really IS 
>installed, maybe
>the set of Base packages in cygwin has grown to 100 megabytes by 
>now).
>But there is no requirement that you must download every single 
>package
>provided at cygwin.com to use cygwin.
>
>- --
>Life is short - so eat dessert first!
>
>Eric Blake             ebb9 AT byu DOT net
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