Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!uwm.edu!gem.mps.ohio-state.edu!ginosko!uunet!virtech!cpcahil
From: cpcahil@virtech.UUCP (Conor P. Cahill)
Newsgroups: comp.unix.xenix
Subject: Re: 'Rename' Library Function?
Keywords: rename lib
Message-ID: <1179@virtech.UUCP>
Date: 19 Sep 89 16:38:22 GMT
References: <[157]unix@oldcolo.UUCP>
Organization: Virtual Technologies Inc
Lines: 37

In article <[157]unix@oldcolo.UUCP>, dave@oldcolo.UUCP (Dave Hughes) writes:
> WHen I try to compile an indexing program written on a Mac (AIX I think)
							      ^^^ AUX?
> system, which has a 'rename' library function, it bombs on that function,
> returning an 'unresolved external' error on _rename.

The problem is due to the fact that AUX is *probably* BSD based and has the
rename(2) system call.  This system call is not available in plain jane 
system V systems.  Although xenix is not plain jane system V, it is not 
based upon BSD and does not include the rename system call.

> It is used - and needed - in the following type of use:
> 
>     char oldname[32], finalname[65];                                   
>     sprintf (oldname, "x%dk0", generation_number);                     
>     sprintf (finalname, "%s.k", doc_filename);                         
>     if (rename (oldname, finalname))                                   
>         printf ("Sorry -- error in renaming file %s to %s!\n", oldname,
>                 finalname);                                            

You neet to write a rename function that should do the following:

	rename(src,tgt)
		char		* src;
		char		* tgt;
	{
		if( (link(src,tgt) == -1) ||  (unlink(src) == -1) )
			return(-1);
		return(0);
	}


-- 
+-----------------------------------------------------------------------+
| Conor P. Cahill     uunet!virtech!cpcahil      	703-430-9247	!
| Virtual Technologies Inc.,    P. O. Box 876,   Sterling, VA 22170     |
+-----------------------------------------------------------------------+