On Fri, Sep 19, 2014 at 8:12 AM, Martin Maechler <maech...@stat.math.ethz.ch> wrote: >>>>>> Harris A Jaffee <h...@jhu.edu> >>>>>> on Thu, 18 Sep 2014 19:32:29 +0200 writes: > > (using HTML, please don't ) > > > The loop that echoes the arguments almost always stops too soon. It > > apparently does that to avoid > > echoing the "--args" (that had been inserted) when there are no user > > arguments. However, when there > > are user arguments, the next element of the 'av' array is the last > > argument and usually not "--args", > > although it can be. > > ?Rscript is a little sketchy: > > `--verbose' gives details of what `Rscript' is doing. Also passed > > on to R. > > What is passed to R is correct, but the diagnostic is not: > > $ Rscript --verbose /dev/null 1 2 > > running > > '/path_to_R --slave --no-restore --file=/dev/null --args 1' > > Fixed (only tested on Mac): > > $ Rscript --verbose /dev/null 1 2 > > running > > '/Library/Frameworks/R.framework/Versions/3.1/Resources/bin/R --slave > > --no-restore --file=/dev/null --args 1 2' > > You are right about the problem, also reproducible on Linux. > You mention a 'fix'. > It looks to me that is just > > - for(i = 1; i < ac-1; i++) fprintf(stderr, " %s", av[i]); > + for(i = 1; i < ac; i++) fprintf(stderr, " %s", av[i]); > > in unix/Rscript.c, right ?
Yes, I suggested the same patch here: http://r.789695.n4.nabble.com/patch-Rscript-off-by-one-error-in-output-td4693780.html Scott > BTW: If one use -e 'commandArgs()' instead of /dev/null one > sees that Rscript's "lying" about the last argument is not > helpful anyway : > > Rscript --verbose -e 'commandArgs()' > > running > '/usr/local64.sfs/app/R/R-3.1.1-inst/bin/R --slave --no-restore -e > commandArgs()' > > [1] "/usr/local64.sfs/app/R/R-3.1.1-inst/bin/exec/R" > [2] "--slave" > [3] "--no-restore" > [4] "-e" > [5] "commandArgs()" > [6] "--args" > > because the '--args' appears anyway and indeed *is* passed to 'R'... > > A better fix would rather suppress that; but I will commit the > above change. -- Scott Kostyshak Economics PhD Candidate Princeton University ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
