Groups > comp.lang.java.programmer > #29821

Re: A "current directory" concept for Java...

Path	csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!eu.feeder.erje.net!eternal-september.org!feeder.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail
From	Martin Gregorie <martin@address-in-sig.invalid>
Newsgroups	comp.lang.java.programmer
Subject	Re: A "current directory" concept for Java...
Date	Sat, 23 Aug 2014 14:24:33 +0000 (UTC)
Organization	A noiseless patient Spider
Lines	41
Message-ID	<lta871$22r$1@dont-email.me> (permalink)
References	<slrnlvet48.fp3.avl@login.logic.tuwien.ac.at> <lt85hb$gnk$1@dont-email.me> <slrnlvfl43.fp3.avl@login.logic.tuwien.ac.at>
Mime-Version	1.0
Content-Type	text/plain; charset=UTF-8
Content-Transfer-Encoding	8bit
Injection-Date	Sat, 23 Aug 2014 14:24:33 +0000 (UTC)
Injection-Info	mx05.eternal-september.org; posting-host="e5160e2be48f1ea550cf61512446f525"; logging-data="2139"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX191vd+f71wuVKl7vRavkWReBo0yNefOr3M="
User-Agent	Pan/0.139 (Sexual Chocolate; GIT bf56508 git://git.gnome.org/pan2)
Cancel-Lock	sha1:Vn3nqT79YtC2QR9lMk0uo/xsD3k=
Xref	csiph.com comp.lang.java.programmer:29821

Show key headers only | View raw

On Fri, 22 Aug 2014 23:38:43 +0000, Andreas Leitgeb wrote:

> I'll need to emulate some kind of current directory,
>
If you haven't already done so, take a look at File.listFiles() and its 
filter-equipped siblings. Those are what I've used when I've needed the 
equivalent of C's directory reading functions. The File[] array they 
return isn't in any particular order, but then neither are the files that 
repeated calls to the readdir() function returns.
 
> and will need to
> manually join user-provided relative paths (typically bare filenames)
> to that current directory for various uses (open,remove,rename,...).
>
>
easy enough using a recursive method with a File argument. Something like 
this does the trick if you want to walk a directory tree looking at all 
the files in it:

void processDirectory(File dir)
{
   File flist[] = f.listFiles();
   for (int i = 0; i < flist.length; i++
   {
      if (flist[i].isDirectory())
         processDirectory(new File(dir, flist[i].getName()));
      else
      { /* Deal with the files in the list. */ }
   }
}

> Eventually I need to spawn processes, which then need that emulated
> current directory to be their initial real current directory.
>
Do these have to be Java processes?


-- 
martin@   | Martin Gregorie
gregorie. | Essex, UK
org       |

Thread

A "current directory" concept for Java... Andreas Leitgeb <avl@auth.logic.tuwien.ac.at> - 2014-08-22 16:49 +0000
  Re: A "current directory" concept for Java... Jeff Higgins <jeff@invalid.invalid> - 2014-08-22 14:50 -0400
  Re: A "current directory" concept for Java... Jeff Higgins <jeff@invalid.invalid> - 2014-08-22 15:10 -0400
  Re: A "current directory" concept for Java... Martin Gregorie <martin@address-in-sig.invalid> - 2014-08-22 19:26 +0000
    Re: A "current directory" concept for Java... Andreas Leitgeb <avl@auth.logic.tuwien.ac.at> - 2014-08-22 23:38 +0000
      Re: A "current directory" concept for Java... Martin Gregorie <martin@address-in-sig.invalid> - 2014-08-23 14:24 +0000
        Re: A "current directory" concept for Java... Andreas Leitgeb <avl@auth.logic.tuwien.ac.at> - 2014-08-23 16:31 +0000
          Re: A "current directory" concept for Java... Martin Gregorie <martin@address-in-sig.invalid> - 2014-08-23 19:34 +0000
            Re: A "current directory" concept for Java... Andreas Leitgeb <avl@auth.logic.tuwien.ac.at> - 2014-08-24 08:42 +0000
              Re: A "current directory" concept for Java... Martin Gregorie <martin@address-in-sig.invalid> - 2014-08-24 10:37 +0000
                Re: A "current directory" concept for Java... Andreas Leitgeb <avl@auth.logic.tuwien.ac.at> - 2014-08-24 13:41 +0000
                Re: A "current directory" concept for Java... Martin Gregorie <martin@address-in-sig.invalid> - 2014-08-24 18:33 +0000
                Re: A "current directory" concept for Java... Andreas Leitgeb <avl@auth.logic.tuwien.ac.at> - 2014-08-24 22:33 +0000
                Re: A "current directory" concept for Java... Martin Gregorie <martin@address-in-sig.invalid> - 2014-08-25 00:14 +0000
  Re: A "current directory" concept for Java... Jeff Higgins <jeff@invalid.invalid> - 2014-08-22 19:45 -0400
    Re: A "current directory" concept for Java... Andreas Leitgeb <avl@auth.logic.tuwien.ac.at> - 2014-08-23 15:32 +0000
      Re: A "current directory" concept for Java... Jeff Higgins <jeff@invalid.invalid> - 2014-08-23 12:49 -0400
      Re: A "current directory" concept for Java... Jeff Higgins <jeff@invalid.invalid> - 2014-08-23 17:40 -0400
  Re: A "current directory" concept for Java... Jan Burse <janburse@fastmail.fm> - 2014-08-23 10:31 +0200
    With new Path (Re: A "current directory" concept for Java...) Jan Burse <janburse@fastmail.fm> - 2014-08-23 10:48 +0200
      Re: With new Path (Re: A "current directory" concept for Java...) Andreas Leitgeb <avl@auth.logic.tuwien.ac.at> - 2014-08-23 14:38 +0000
  Re: A "current directory" concept for Java... Roedy Green <see_website@mindprod.com.invalid> - 2014-08-23 05:31 -0700

csiph-web