Mailing-List: contact cygwin-help@sourceware.cygnus.com; run by ezmlm Sender: cygwin-owner@sourceware.cygnus.com Delivered-To: mailing list cygwin@sourceware.cygnus.com Message-ID: <374C93CB.54BAD584@cisco.com> Date: Wed, 26 May 1999 17:37:31 -0700 From: "Ashish C. Nagre" Reply-To: ashishcn@cisco.com Organization: Cisco Systems X-Mailer: Mozilla 4.03 [en] (WinNT; U) MIME-Version: 1.0 To: "Suhaib M. Siddiqi" CC: "Ashish C. Nagre" , cygwin@sourceware.cygnus.com Subject: Re: ioctl() question - SLIGHT CHANGE References: <374C928B.AB301B0D@ipass.net> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit > "Ashish C. Nagre" wrote: > > > > Hi, > > I was trying to port an app from UNIX to NT, one of the things that needs > > to be done is to get the interface addresses associated with the machine. > > It does that using the following call: > > > > ioctl(fd, SIOCGIFADDR, (char*)&ifr) > > where, > > fd - is a socket > > ifr - is a struct ifreq. > > The function returns an error saying Invalid Argument. > > Actually, SIOCGIFADDR was not defined with cygwin, so I added the > > following also: > > > > /* Just a definition of a macro which was not with cygnus; */ > > /* so the compiler doesn't complain. */ > > #define IOC_INOUT (IOC_IN |IOC_OUT) > > #define _IOWR(x, y, t) \ > > (IOC_INOUT|((((int)sizeof (t))&IOCPARM_MASK)<<16)|(x<<8)|y) > > #define SIOCGIFADDR _IOR('i', 13, struct ifreq) /* get ifnet > > address */ That should read as _IOWR instead of _IOR. > > > > I would greatly appreciate it if you could help me out since I am stuck on > > this for a long time and have no clue about how to go about this. > > Thanks for your time. > > > > Ashish > > > > ************************************************************************** > > ASHISH C. NAGRE Graduate Student > > Department of Computer Sciences e-mail: nagreac@cs.purdue.edu > > Purdue University,W. Lafayette Phone : (765)-494-5007 > > Indiana, 47906. USA Office: MA 407 > > url : www.cs.purdue.edu/people/nagreac > > ************************************************************************** > > :PHILOSOPHY OF LIFE: > > Stability without boredom; passion without recklessness; happiness > > without naivete. Plan for sunshine but bring an umbrella. A little > > paranoia never hurt anyone. Underpromise and overdeliver. > > --------------------------------------------------------------------------- > > -- > Want to unsubscribe from this list? > Send a message to cygwin-unsubscribe@sourceware.cygnus.com -- Want to unsubscribe from this list? Send a message to cygwin-unsubscribe@sourceware.cygnus.com