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I am using Windows 2008 R2 and Apache Tomcat 5.5, for your information. STDOUT and STDERR can be automatically logged through Apache Tomcat properties, via Logging tab -> Redirect Stdout and Redirect Stderror textboxes. But I want to control this through log4j. I'm trying to leverage ConsoleAppender and the TimeAndSizeRollingAppender class to rollover what would normally be controlled by Apache Tomcat's innate logging. Basically, however Tomcat redirects stdout and stderr to a file, I want to do the same thing using log4j and the log4j.properties file. I did some digging on this site and

I am triggering an ant script (via cruise control), and would like to be able to dump the std out and std err for a particular ant target to a plain text file . Yes, I am aware that cruise control already does maintain an XML log file containing this information (among many other things), but for portability reasons, I need this to happen from the ant script itself. Is this possible, and if so, how to do it? Many thanks! ChssPly76 The recorder task may be able to do what you want: <record name="log.txt" action="start"/> ... <record name="log.txt" action="stop"/> Beyond that, certain tasks

I am trying to have STDOUT/STDERR from a exec'ed child process go back to the parent via a pipe in Perl. The closest I have seen to what I want to do is at : http://forums.devshed.com/perl-programming-6/exec-and-redirecting-stdout-stderr-168501.html The following is a stripped down example of what I am trying to do. I also tried a variant of the link above. I can't see what I'm doing wrong... #!/usr/bin/env perl use strict ; use warnings ; my $cmd = "/usr/bin/who -a" ; # anything to stdout pipe( READER, WRITER ) ; my $child = fork() ; if ( $child ) { print "I am the parent: My pid = $$ junior

If I have an R script: print("hi") commandArgs() And I run it using: r CMD BATCH --slave --no-timing test.r output.txt The output will contain: [1] "hi" [1] "/Library/Frameworks/R.framework/Resources/bin/exec/x86_64/R" [2] "-f" [3] "test.r" [4] "--restore" [5] "--save" [6] "--no-readline" [7] "--slave" How can i suppress the line numbers[1]..[7] in the output so only the output of the script appears? Yes, mbq is right -- use Rscript , or, if it floats your boat, littler : $ cat /tmp/tommy.r #!/usr/bin/r cat("hello world\n") print(argv[]) $ /tmp/tommy.r a b c hello world [1] "a" "b" "c" $ You

After 30mins of futile attempt to capture the output of wget , I figured out that the program writes to stderr rather than the stdout . Searching in web and stack-overflow reveals this to be a well-known fact. Any idea why is this so? It's well known, because it's in the manual . Reporting messages on stderr is common, because messages are separated from regular output on stdout . This is useful when you combine several tools with a pipe. In this case it would be bad, when regular output and diagnostic messages were mixed up. 来源： https://stackoverflow.com/questions/13066518/why-does-wget

I'm spawning a process in node and tracking the output of the command like this: proc.stdout.on("data", function (data) { console.log(data.toString()); }); It works well, however, the output seems to be splitting the lines: npm http 304 https://registry.npmjs.org/underscore The above is just one line out of the response from an npm install . Typically this is all in one line, it's also adding line breaks before and after the response. Is there a way to get the data output to look like the standard run, i.e. line-by-line? Streams are buffered and emit data events whenever they please (so to

You want to write unittest -cases for a function like that: def test_me(a): for b in c: print do_something(a,b) At first I thought about just collecting the outputs of do_something in a string and then returning it, to print and test the whole output together. But it's not always convinient because such loops could cause your buffer string to get very big, depending on the circumstances. So what can you do to test the output, when it is printed and not returned? print prints to sys.stdout , which you can reassign to your own object if you wish. The only thing your object needs is a write