Re: [ROOT] How to list files

From: Satoru KAMEOKA (kameoka@lambda.phys.tohoku.ac.jp)
Date: Wed Jul 30 2003 - 07:22:00 MEST


Hi, Valeriy,
thank you for reply.

I wrote your solution as a function in rootalias.C with a little
modification to avoid SegV when no file is opened.

void lf()
{
  TIter next(gROOT->GetListOfGlobals());
  TGlobal *global;
  while ((global=(TGlobal*)next())) {
    TString type = global->GetTypeName();
    if (type=="TFile") {
      TFile *file = (TFile*)gInterpreter->Calc(global->GetName());
      if (file && file->IsOpen())
	printf("%s: %s\n", global->GetName(),file->GetName());
    }
  }
}

But, unfortunately, this does not always work properly.

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FreeType Engine v2.1.3 used to render TrueType fonts.
Compiled for linux with thread support.

CINT/ROOT C/C++ Interpreter version 5.15.86, Apr 29 2003
Type ? for help. Commands must be C++ statements.
Enclose multiple statements between { }.
root [0] TFile f("foo.root")
root [1] lf()
gFile: foo.root
f: foo.root
root [2] f.Close()
root [3] lf()
root [4] lf()
root [5] lf()
root [6] TFile f("foo.root")
root [7] lf()
gFile: foo.root
f: foo.root
root [8] TFile f2("bar.root")
root [9] lf()
gFile: bar.root
f: foo.root
root [10] 

"f2" is not listed now.
Is this an unreasonable demand?

   Best regards,
   Satoru Kameoka


From: "Valeriy Onuchin" <Valeri.Onoutchine@cern.ch>
Subject: Re: [ROOT] How to list files
Date: Tue, 29 Jul 2003 15:52:26 +0200
Message-ID: <066001c355d8$a50ebfd0$c1848a89@cern.ch>

>  Hi Satoru KAMEOKA,
> 
> TIter next(gROOT->GetListOfGlobals());
> TGlobal *global;
> TFile *file;
> while ((global=(TGlobal*)next())) {
>     TString type;
>     type = global->GetTypeName();
>     if (type=="TFile") {
>         file = (TFile*)gInterpreter->Calc(global->GetName());
>         printf("%s: %s\n", global->GetName(),file->GetName());
>     }
> }
> 
> HTH. Regards. Valeriy
> 
> > Hi, Valeriy,
> > Thank you for reply.
> > The way you taught surely shows file name and its contents, but not
> > associated object "instance name". 
> > 
> > What I hope is, when some files are opened,
> > root[] TFile f1("foo.root")
> > root[] TFile f2("bar.root")
> > root[] TFile f3("hoge.root")
> > 
> > some command can show the list as below.
> > root[] some_command
> > f1     "foo.root"
> > f2     "bar.root"
> > f3     "hoge.root"
> > 
> > Yes, I can understand that we can easily retrieve TFile object pointer
> > from file name even if I've fogotten the instance names(f1, f2, f3).
> > But I feel such command would be useful, because I sometimes attempt
> > to use already connected TFile object by mistake and cause
> > segmentation violation, like
> > root[] TFile f("A_file.root")
> > root[] TFile f("Another_file.root")
> > 
> > Anyway, thanks a lot.
> > 
> > Best regards,
> > S.Kameoka
> > 
> > From: "Valeriy Onuchin" <Valeri.Onoutchine@cern.ch>
> > Subject: Re: [ROOT] How to list files
> > Date: Mon, 28 Jul 2003 17:07:52 +0200
> > Message-ID: <028001c3551a$04c250a0$c1848a89@cern.ch>
> > 
> > >  Hi Satoru,
> > > 
> > > TIter next(gROOT->GetListOfFiles());
> > > TObject *obj;
> > > while ((obj=next())) obj->ls();
> > > 
> > > HTH. Regards. Valeriy
> > > 
> > > > Dear ROOT developers and users,
> > > > 
> > > > is there any way to list currently opened files?
> > > > I found gROOT->GetListOfFiles()->Print() prints file names,
> > > > but I want to know also associated TFile object instance names
> > > > as "ldir //" command of PAW shows file name and LUN.
> > > > 
> > > > 
> > > >    Best regards,
> > > >    Satoru Kameoka
> > > >    
> > > > 
> > > 
> > 
> 



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