stdout

Looking for an options which let me to redirect R diagnostic messages (produces by message() ) to stdout , not stderr as it is by default. message manual states: The default handler sends the message to the stderr() connection. So the question is how can I change this default behavior? still leaving redirection of warning() and stop() intact. Already tried sink type='message' but it redirects all (messages, warnings, errors). If anyone is willing to test, this is sample script exec_test.R : print("using print") cat("using cat\n") message("using message") warning("using warning") stop("using

I have the following request library(RCurl) res=getURL("http://www.google.com/search?hl=en&lr=&ie=ISO-8859-1&q=RCurl&btnG=Search", .opts=list(verbose = TRUE) ) and would like to capture the verbose output of the call (i.e., what is printed in red in the R console). I thought that the output lines are messages and are therefore printed to stderr() . The following works for messages sink(textConnection("test","w"),type="message") message("test message") sink(stderr(),type="message") test #[1] "test message" but not if I replace message("test message") by the RCurl request res=getURL(.....) as

The shell command $ avrdude -c usbtiny outputs text to stderr. I cannot read it with commmands such as head-less-more cos it is not stdout. I want the text to stdout or to a file. How can I do it in C? I have tried to solve the problem by my last question but still unsolved. I've not tried something like this in OpenBSD, but in at least a few *nix-like systems, you can do this using dup2 . #include <unistd.h> #include <stdio.h> int main(void) { fprintf(stderr, "This goes to stderr\n"); dup2(1, 2); //redirects stderr to stdout below this line. fprintf(stderr, "This goes to stdout\n"); } The

In Stevens' UNIX Network Programming, he mentions redirecting stdin, stdout and stderr, which is needed when setting up a daemon. He does it with the following C code /* redirect stdin, stdout, and stderr to /dev/null */ open("/dev/null", O_RDONLY); open("/dev/null", O_RDWR); open("/dev/null", O_RDWR); I'm confused how these three 'know' they are redirecting the three std*. Especially since the last two commands are the same. Could someone explain or point me in the right direction? Presumably file descriptors 0, 1, and 2 have already been closed when this code executes, and there are no other

Is there a way to catch the stdout and stderr in Visual Studio? For example, when I use cout <<"Hello world!"<< endl; A black window appears and disappears. It's so fast that I can't see it. There is a output section in the IDE but it only allow me to choose display output from build and something else but without the choice of stdout. A cheating solution maybe calling system("pause"); but it doesn't sound right. I searched in the option but I can't find an item. Anyone has any idea? Thanks. I just start to use VS and I'm on Linux before. Rather than using the "Start Debugging" command, if you

I want to use some useful functions as commands. For that I am testing the click library. I defined my three original functions then decorated as click.command : import click import os, sys @click.command() @click.argument('content', required=False) @click.option('--to_stdout', default=True) def add_name(content, to_stdout=False): if not content: content = ''.join(sys.stdin.readlines()) result = content + "\n\tadded name" if to_stdout is True: sys.stdout.writelines(result) return result @click.command() @click.argument('content', required=False) @click.option('--to_stdout', default=True) def

This question already has an answer here: How to just call a command and not get its output [duplicate] 4 answers For the following command: subprocess.call(shlex.split( """/usr/local/itms/bin/iTMSTransporter -m lookupMetadata -apple_id %s -destination %s"""%(self.apple_id, self.destination)) It prints the entire output into the Terminal window. How would I suppress ALL output here? I tried doing subprocess.call(shlex.split(<command> > /dev/null 2&1 )), but it didn't produce the required results. How would I do this here? You can use the stdout= and stderr= parameters to subprocess.call() to