so i tried... Int_t i_last=272; for(Int_t i=1;i<=i_last;i++){ char fileName[70]; sprintf(fileName,"/nfs/data04/olivas/Stream16/B/BJpsiSkimFeb14%s_%d.root",name,i); //if(!gSystem->AccessPathname(fileName)){ Long_t* id; Long_t* size; Long_t* flags; Long_t* modtime; if(!gSystem->GetPathInfo(fileName,id,size,flags,modtime)){ cout<<gSystem->GetPathInfo(fileName,id,size,flags,modtime)<<":"; cout<<fileName; if(id) cout<<" id:"<<*id; if(size) cout<<" size:"<<*size; if(flags) cout<<" flags:"<<*flags; if(modtime) cout<<" modtime:"<<*modtime; cout<<endl; TFile f(fileName); ksMassNoCuts->Add((TH1F*)f.Get("h1d3")); ksMassCuts->Add((TH1F*)f.Get("h1d5")); jpsiMassNoCuts->Add((TH1F*)f.Get("h1d7")); jpsiMassCuts->Add((TH1F*)f.Get("h1d9")); } } GetPathInfo seems to work just fine for checking whether files exist or not, but if the file does exist id, size, flags, and modtime are all "NULL." i would like to have access to these, because i would also like to skip files that are open and currently being written to by batch jobs. thanks, alex. -----Original Message----- From: Rene Brun To: Sebastien Greder Cc: Olivas, Alexander Raymond; 'roottalk@root.cern.ch' Sent: 4/9/2003 2:39 AM Subject: Re: [ROOT] Help with TFile Sebastien, Thanks for correcting my mistake. Rene Sebastien Greder wrote: > > 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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