I'm wondering if anyone knows of a way to capture system messages, for instance when I do the following:> system("../DBScripts/getEODData.sh").//LSE_20091230.txt: 154.80 kB 207.24 kB/s ./Fundamentals//LSE.txt: 420.58 kB 301.47 kB/s ./Fundamentals//MLSE.txt: 3.42 kB 16.20 kB/s Remote host has closed the connection. ncftpget /: remote host closed control connection.>I'd like to get the stdout from the system call into some memory location where I can play with it... Is there a simple way to do this? [[alternative HTML version deleted]]
Nick,
You don't specify OS, so details might differ, but on my linux system the
help for system (which should be the first place you'd look anyway) has
an entire section on stdout and stderr
Stdout and stderr:
Error messages written to ?stderr? will be sent by the shell to
the terminal unless ?ignore.stderr = TRUE?. They can be captured
(in the most likely shells) by
system("some command 2>&1", intern=TRUE)
What happens to output sent to ?stdout? and ?stderr? if ?intern FALSE?
is interface-specific, and it is unsafe to assume that such
messages will appear on a console (they do on the Mac OS X
console, but not on some others).
Sarah
On Wed, Dec 30, 2009 at 3:15 PM, Nick Torenvliet
<nick.torenvliet at gmail.com> wrote:> I'm wondering if anyone knows of a way to capture system messages, for
> instance when I do the following:
>
>> system("../DBScripts/getEODData.sh")
> .//LSE_20091230.txt: ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 154.80 kB ?207.24
> kB/s
> ./Fundamentals//LSE.txt: ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 420.58 kB ?301.47
> kB/s
> ./Fundamentals//MLSE.txt: ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?3.42 kB ? 16.20
> kB/s
> Remote host has closed the connection.
> ncftpget /: remote host closed control connection.
>>
>
> I'd like to get the stdout from the system call into some memory
location
> where I can play with it...
>
> Is there a simple way to do this?
>
--
Sarah Goslee
http://www.functionaldiversity.org
?capture.output ?sink What is the problem you are trying to solve? Sent from my iPhone. On Dec 30, 2009, at 15:15, Nick Torenvliet <nick.torenvliet at gmail.com> wrote:> I'm wondering if anyone knows of a way to capture system messages, for > instance when I do the following: > >> system("../DBScripts/getEODData.sh") > .//LSE_20091230.txt: 154.80 kB > 207.24 > kB/s > ./Fundamentals//LSE.txt: 420.58 kB > 301.47 > kB/s > ./Fundamentals//MLSE.txt: 3.42 kB > 16.20 > kB/s > Remote host has closed the connection. > ncftpget /: remote host closed control connection. >> > > I'd like to get the stdout from the system call into some memory > location > where I can play with it... > > Is there a simple way to do this? > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help at r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code.