dev.print + impossible filename -> break (PR#1959)

[ripley@stats.ox.ac.uk]

Here's the nub.

> postscript(file="|llllll")
> sh: llllll: command not found

> dev.off()
Broken pipe

and it's related to how popen/pclose are implemented.  The help page
does say errors are hard to detect, but we can do a bit better than this.

On Wed, 28 Aug 2002 otoomet@econ.dk wrote:

> Full_Name: Ott Toomet
> Version: 1.5.1
> OS: Linux (RH 7.1)
> Submission from: (NULL) (192.38.43.138)
>
>
> Hi,
>
> Try to give an impossible file name (command to pipe through) for dev.print:
>
> > plot(1:4)
> > dev.print(file="|llllll")
>
> I got the response
>
> sh: llllll: command not found
>
> Process R broken pipe at Wed Aug 28 14:42:27 2002
>
> After which R was killed (or at least vanished from the process list).
>
> Best,
>
> Ott
>
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-- 
Brian D. Ripley,                  ripley@stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
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