[Rd] help.start() displays index.html in emacs (PR#13293)

[Prof Brian Ripley]

On Sun, 16 Nov 2008, rose at rz.uni-potsdam.de wrote:

> Full_Name: Juergen Rose
> Version: 2.8.0 (2008-10-20)
> OS: Linux  2.6.27.4 x86_64 Intel
> Submission from: (NULL) (87.185.220.122)
>
>
> If I start as ordinary user rose R and help.start(), the help is displayed in
> emacs. If I do as the user root, file:///tmp/Rtmpyzlc7Y/.R/doc/html/index.html
> is shown as expected in a firefox windows. So it seems to be connected with my
> private configuration. But I can not find such a configurations:

So why report this as a bug in R (especially without reading the help 
pages concerned)?

help.start uses R_BROWSER to select the browser in use via browseURL: see 
the help for help.start and browseURL.  Check options("browser") in each 
of the accounts.

Another thing you have not told us is how you installed R: the default for 
R_BROWSER is set at install time in R_HOME/etc/Renviron.  However, as it 
works correctly for 'root', I guess it is your account that has some 
setting of the browser to be used.

>
> rose at condor:/home/rose(114)$ ll ~/.R*
> -rw-r--r-- 1 rose users 2369 Jan 20  2008 /home/rose/.RapidSVN
>
> I also tried to start R with strace:
> rose at condor:/home/rose(119)$ strace -f -o R_strace.log R
>
> and greped for mime:
>
> rose at condor:/home/rose(120)$ grep "open.*rose.*mime" R_strace.log
> 7221  open("/home/rose/.local/share//mime/mime.cache", O_RDONLY) = 14
> 7221  open("/home/rose/.local/share/applications/mimeinfo.cache", O_RDONLY) =
> 14
> 7221  open("/home/rose/.local/share/applications/mimeapps.list", O_RDONLY) = 14
> 7223  open("/home/rose/.local/share//mime/mime.cache", O_RDONLY) = 7
>
> and then I searched for emacs in these files:
>
>
> rose at condor:/home/rose(121)$ for f in /home/rose/.local/share//mime/mime.cache
> /home/rose/.local/share/applications/mimeinfo.cache
> /home/rose/.local/share/applications/mimeapps.list
> /home/rose/.local/share//mime/mime.cache; do echo "------------------ f=$f
> --------------";   grep emacs $f ; done
> ------------------ f=/home/rose/.local/share//mime/mime.cache --------------
> ------------------ f=/home/rose/.local/share/applications/mimeinfo.cache
> --------------
> application/x-x509-ca-cert=emacs-21-usercustom.desktop
> ------------------ f=/home/rose/.local/share/applications/mimeapps.list
> --------------
> ------------------ f=/home/rose/.local/share//mime/mime.cache --------------
>
> But I could not find anything suspicious
>
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-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
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