Hi,
sorry but the AccessPathname return value is the opposite, cf classindex
doc :
Bool_t AccessPathName(const char *, EAccessMode)
Returns FALSE if one can access a file using the specified access mode.
Attention, bizarre convention of return value!!
seb.
On Wed, 9 Apr 2003, Rene Brun wrote:
> Hi Alex,
>
> I don't know that is the "g" object in your statement g.Open !
>
> To test if a file exist, you can use
> gSystem->AccessPathname(fileName);
> This will return kTRUE if the file can be accessed, kFALSE otherwise.
>
> Rene Brun
>
> "Olivas, Alexander Raymond" wrote:
> >
> > I'm not sure if this is the correct place to post this question,
> > but here it goes.
> >
> > I have many jobs currently creating quite a few root files.
> > I have the files numbered so I can read them using a simple
> > for loop. However, some jobs haven't started yet and some
> > are still running. I would like to read only the files that
> > exist and are closed.
> >
> > I've tried something like...
> >
> > Int_t i_last=272;
> > for(Int_t i=1;i<=i_last;i++){
> > char fileName[60];
> > sprintf(fileName,"$NTUPLE_DIR/B/BJpsiSkimFeb14%s_%d.root",name,i);
> > if(g.Open(fileName)){
> > TFile f(fileName);
> > ksMassNoCuts->Add((TH1F*)f.Get("h1d3"));
> > }
> > }
> >
> > g.Open(fileName) still returns true if the file does not exist.
> > I've searched through the root page and have had trouble finding
> > anything that will allow me to assess the state of a file without
> > explicity trying to open it.
> >
> > Any help would be greatly appreciated.
> > Thanks,
> > Alex.
>
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