On 30 Nov 2003, Peter Dalgaard wrote: > Prof Brian Ripley <[EMAIL PROTECTED]> writes: > > > On Sat, 29 Nov 2003, Simon Urbanek wrote: > > > > > The current R needs R_HOME to be set before using it even in its > > > embedded form. Now this defeats the idea of location independence of > > > the framework. The application doesn't have to care whether the > > > framework is in /Library/Frameworks, ~/Library/Frameworks or any > > > user-defined framework location. Therefore it would be nice to have a > > > tiny function in the R shlib, that would tell me where the shlib lives > > > (either by using system's API to determine its own location, or at > > > least the path used on installation). > > > > > > BTW: This is not Mac specific - I was fighting this on Windows (and > > > unix for that matter) as well - it is possible to run an .exe linked to > > > R.dll from anywhere, if R.dll is in the PATH. But then, one has to > > > determine R_HOME somehow (yes, there is the registry, but that's not > > > really safe if more R versions are installed). > > > > How do you do that? For R's own executables on Windows R_HOME is > > determined from where they are loaded from. You cannot AFAIK determine > > from within an executable where the R.dll was linked from. That's why the > > rproxy.dll uses the registry. I believe you have even less information on > > Windows. > > ..than on Windows? Did you mean Unix there?
Yes, sorry, `than' was missing. I meant on MacOS X. > Finding the full path name of the current executable is a well-known > impossible under Unix (there's no enforced relation between the > executable and what goes in argv[0]). Doesn't keep applications from > trying anyway, and mostly succeeding. E.g. Tcl has Tcl_FindExecutable. But it is not the executable's but the DLL's full path that it is used to find R_HOME. On Windows you could in principle find loaded occurrences of R.dll, but I don't know how to do that on Unix (and it is a lot less likely to be unique). -- Brian D. Ripley, [EMAIL PROTECTED] Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595 ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-devel
