On Jul 2, 2013, at 11:46 AM, Rong lI Li wrote:
>
> Hi, all,
>
> I pressed Ctrl+C in R process, and found that the child process which was
> spawned by using "pipe" is terminated due to this.
> Are there any way to work around it, so that the child process can run
> happily without being terminated? Or can we block the signal for the child
> process?
>
Yes, simply handle the INT signal in your C++ process and do what you deem
appropriate (which does include the option of doing nothing / ignoring).
Other option is to do a double-fork ( fork -> if (fork()) exit) so you
disassociate the child from the parent group or to possibly use setsid(), both
as to not share the terminal with the parent.
Cheers,
Simon
> 1. I used pipe to spawn one C++ process, which will running in a loop
> without exiting immediately.
>
> z <- pipe("./mytest", open = "r+")
>> z
> description class mode text opened can read
> "./mytest" "pipe" "r+" "text" "opened" "yes"
> can write
> "no"
>
> 2. When I press "Ctrl+C" in the current R shell, I found the forked child
> process was also terminated. Are there any way to work around it?
>
> =====================
>
> Rong "Jessica", Li (ÀîÈÙ)
> Platform Symphony TET, CSTL, IBM Systems &Technology Group, Development
> Tel:86-10-82451010 Email:rong...@cn.ibm.com
> [[alternative HTML version deleted]]
>
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