Re: [Rd] How to disable R's crash prompt

From: <Wayne.Zhang_at_barclayscapital.com>
Date: Tue, 08 Mar 2011 17:41:54 -0500

That did the trick. Thank you soooooo much Simon!

Wayne

-----Original Message-----
From: Simon Urbanek [mailto:simon.urbanek_at_r-project.org] Sent: Tuesday, March 08, 2011 5:28 PM
To: Zhang, Wayne: IT (NYK)
Cc: ripley_at_stats.ox.ac.uk; r-devel_at_r-project.org Subject: Re: [Rd] How to disable R's crash prompt

On Mar 8, 2011, at 10:01 AM, <Wayne.Zhang_at_barclayscapital.com> <Wayne.Zhang_at_barclayscapital.com> wrote:

> Thanks for your quick comment Mr. Ripley. I'm a newbie in R so excuse me for not knowing the obvious. Could you elaborate on what code I should look at, and what documentation I should go to?
>
> This is my C++ code on calling embedded R (on redhat enterprise linux 4):
>
> char *localArgs[] = { "R", "--silent" }; // tried --slave, -f, --vanilla too
> Rf_initEmbeddedR(sizeof(localArgs)/sizeof(localArgs[0]), localArgs);
>

R_Interactive = FALSE;

> PROTECT(load = lang2(install("source"), mkString(file.c_str()))); // file contains R code
> R_tryEval(load, R_GlobalEnv, &errorOccurred);
>
> PROTECT(call = lang2(install(entryPoint.c_str()), input)); // entry point is an R function defined in "file" above
> PROTECT(output = R_tryEval(call, R_GlobalEnv, &errorOccurred));
>
> UNPROTECT(3);
>
>
> What should I do in C++ to make R non-interactive?
>
> Thanks,
> Wayne
>
>
> -----Original Message-----
> From: Prof Brian Ripley [mailto:ripley_at_stats.ox.ac.uk]
> Sent: Tuesday, March 08, 2011 9:51 AM
> To: Zhang, Wayne: IT (NYK)
> Cc: r-devel_at_r-project.org
> Subject: Re: [Rd] How to disable R's crash prompt
>
> On Tue, 8 Mar 2011, Wayne.Zhang_at_barclayscapital.com wrote:
>

>> Dear R devel,
>> 
>> I have a C++ app that calls into embedded R to perform some analytic 
>> calculations.  When my app encounters a segmentation fault, R always 
>> prints the following crash prompt and asks me to enter an action:
>> 
>> 
>> *** caught segfault ***
>> address 0x8, cause 'memory not mapped'
>> 
>> Possible actions:
>> 1: abort (with core dump, if enabled)
>> 2: normal R exit
>> 3: exit R without saving workspace
>> 4: exit R saving workspace
>> 
>> 
>> 
>> The problem is my app will be run in non-interactive mode, so there 
>> is no way for me to enter the action.  Is there a way to disable the

>
> R does not do that in 'non-interactive mode'. Take a look at the
> code: that section is conditional on R_Interactive.
>
>> crash prompt and have R simply crash the whole app?  I have tried 
>> using "-file=/dev/null", "-slave", "-vanilla", and pretty much all 
>> other start options, to no avail.

>
> They do not control if R is interactive: the front-end (yours, I
> presume since you mention embedding but do not otherwise give any
> details) does.
>
>> Thanks in advance for your help,
>> 
>> Wayne

>
> --
> 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
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