Thanks, this works. Cheers, Anton http://www.smartquant.com ----- Original Message ----- From: "Valeri Fine" <fine@bnl.gov> To: "Anton Fokin" <anton.fokin@smartquant.com>; "roottalk" <roottalk@pcroot.cern.ch> Sent: Wednesday, April 17, 2002 4:39 PM Subject: Re: [ROOT] gSystem->Exec() > > > > if I have a running root application and try to run another > > application/execute command via gSystem->Exec(), the primary application > > freezes until command is finished. How can I avoid this, i.e. start an > > independent/separate process/program? > > > There is no generic solution (TSystem::Exec interface defines only parameter) > Consider to use "start" shell command. > try "help start" from command prompt window on each platofrm to see the difference> > For Windows MT line (NT 4.0, W2K, XP) this is as follows: > > > C:\>help start > Starts a separate window to run a specified program or command. > > START ["title"] [/Dpath] [/I] [/MIN] [/MAX] [/SEPARATE | /SHARED] > [/LOW | /NORMAL | /HIGH | /REALTIME | /ABOVENORMAL | /BELOWNORMAL] > [/WAIT] [/B] [command/program] > [parameters] > > "title" Title to display in window title bar. > path Starting directory > B Start application without creating a new window. The > application has ^C handling ignored. Unless the application > enables ^C processing, ^Break is the only way to interrupt > the application > I The new environment will be the original environment passed > to the cmd.exe and not the current environment. > MIN Start window minimized > MAX Start window maximized > SEPARATE Start 16-bit Windows program in separate memory space > SHARED Start 16-bit Windows program in shared memory space > LOW Start application in the IDLE priority class > NORMAL Start application in the NORMAL priority class > HIGH Start application in the HIGH priority class > REALTIME Start application in the REALTIME priority class > ABOVENORMAL Start application in the ABOVENORMAL priority class > BELOWNORMAL Start application in the BELOWNORMAL priority class > WAIT Start application and wait for it to terminate > command/program > If it is an internal cmd command or a batch file then > the command processor is run with the /K switch to cmd.exe. > This means that the window will remain after the command > has been run. > > If it is not an internal cmd command or batch file then > it is a program and will run as either a windowed application > or a console application. > > parameters These are the parameters passed to the command/program > > > If Command Extensions are enabled, external command invocation > through the command line or the START command changes as follows: > > non-executable files may be invoked through their file association just > by typing the name of the file as a command. (e.g. WORD.DOC would > launch the application associated with the .DOC file extension). > See the ASSOC and FTYPE commands for how to create these > associations from within a command script. > > When executing an application that is a 32-bit GUI application, CMD.EXE > does not wait for the application to terminate before returning to > the command prompt. This new behavior does NOT occur if executing > within a command script. > > When executing a command line whose first token is the string "CMD " > without an extension or path qualifier, then "CMD" is replaced with > the value of the COMSPEC variable. This prevents picking up CMD.EXE > from the current directory. > > When executing a command line whose first token does NOT contain an > extension, then CMD.EXE uses the value of the PATHEXT > environment variable to determine which extensions to look for > and in what order. The default value for the PATHEXT variable > is: > > .COM;.EXE;.BAT;.CMD > > Notice the syntax is the same as the PATH variable, with > semicolons separating the different elements. > > When searching for an executable, if there is no match on any extension, > then looks to see if the name matches a directory name. If it does, the > START command launches the Explorer on that path. If done from the > command line, it is the equivalent to doing a CD /D to that path. > > > > > > I am on windows. > > > > Cheers, > > Anton > > > > http://www.smartquant.com > > > > > > > > >
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