stderr

How to remove/hide Atomikos startup error message?

When Atomikos is configured via Spring, a jta.properties or transactions.properties file is not needed. Nonetheless, Atomikos starts up with the follow messages printed to stderr: No properties path set - looking for transactions.properties in classpath... transactions.properties not found - looking for jta.properties in classpath... F...

How do I redirect stderr and stdout to file for a ruby script?

How do I redirect stderr and stdout to file for a ruby script? ...

C: how to redirect stderr from System-command to stdout or file?

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. ...

Capture log4J output with grep

Hi, I know that log4j by default outputs to stderror. I have been capturing the out put of my application with the following command: application_to_run 2> log ; cat log | grep FATAL Is there a way to capture the output without the auxiliary file? ...

What is the name of the standard error stream (Apache+php)

I want to put some text into the Apache error log (listens on the stderror error stream) from PHP using file_put_contents. I am missing the name of this stream, and whether I have to put :// or something similar before it. Thanks ...

Bash script - store stderr in variable

I'm writing a script to backup a database. I have the following line: mysqldump --user=$dbuser --password=$dbpswd \ --host=$host $mysqldb | gzip > $filename I want to assign the stderr to a variable, so that it will send an email to myself letting me know what happened if something goes wrong. I've found solutions to redirect stde...

iPhone: Help. Extracting stderr/messages from GDB and copy to string.

Hi, So the whole idea is this. I need to save those debugging console messages to some strings and then write it to the text file. I have no problem with the writing to text file part as i will be using writeData but I have problems with the first part. in the console i see these error messages when opening corrupted image files in UII...

What are "cerr" and "stderr"? *warning, major newbie question*

What is the difference between them and how are they used? Can anyone point me to examples? Specifically how do you "write" to the stream in both cases and how do you recover and output (ie to the screen) the text that had been written to it? Also, the "screen" output is itself a stream right? Maybe I don't understand streams well enou...

Will loading a DLL dynamically reconcile its stderr to a main application? If so, then how...?

I'm writing a GUI application, using Qt, which links to a third-party DLL that sometimes sends error messages to stderr. I'd like these error messages to be displayed in a window within my GUI. I couldn't find an established way to redirect stderr (as opposed to std::cerr) even after much searching, so I wrote the following class myself...

How to log output in bash and see it in the terminal at the same time?

I have some scripts where I need to see the output and log the result to a file, with the simplest example being: $ update-client > my.log I want to be able to see the output of the command while it's running, but also have it logged to the file. I also log stderr, so I would want to be able to log the error stream while seeing it as ...

Seeing what gets written to stderr in Python web site using FastCGI

I am working on a website, hosted on DreamHost, using Python. For a while, I was using their default setup, which runs Python scripts using CGI. It worked fine, but I was worried that if I get a lot of traffic, it would run slow and use a lot of memory, so I switched it over to FastCGI using this module. Overall, it still works fine, bu...

How to write a pointer to std::cerr?

Given: MY_CLASS* ptr = MY_CLASS::GetSomeInstance(); What is the correct way to output ptr to std::cerr, so I can log its value? Note I don't want to write the class, just the address. ...

How to exit a batch program upon error?

I've got a batch file that does several things. If one of them fails, I want to exit the whole program. For example: @echo off type foo.txt 2>> error.txt >> success.txt mkdir bob If the file foo.txt isn't found then I want the stderr message appended to the error.txt file, else the contents of foo.txt is appended to success.txt. Basic...

Prevent Ghostscript from writing errors to standard output

I'm using Ghostscript to rasterize the first page of a PDF file to JPEG. To avoid creating tempfiles, the PDF data is piped into Ghoscripts's stdin and the JPEG is "drained" on stdout. This pipeline works like a charm until GS receives invalid PDF data: Instead of reporting all error messages on stderr as I would have expected, it still ...

stdin/stdout problem in gcc + rails

...

confused about stdin, stdout and stderr?

Hi, I am rather confused with the purpose of these three files. If my understanding is correct, stdin is the file in which a program writes into its requests to run a task in the process. stdout is the file into which the kernel writes its output and the process requesting it accesses the information from and stderr is the file into whi...

Getting control of std. streams in gcc

How can I get control of the stdin, stdout and stderr streams in gcc.?? We can redirect the error and output to separate files for sure, but is there a way that i can control the stdin such that whenever my program is executing and there is a moment when the stdin waits for a input(either from the user keyboard or any file), it sets a...

Catching and modifying stderr sent from external JAR.

Hello, Is there a way for me to intercept the STDERR stream that is being used from an external JAR file? My situation is that I have my own program using STDERR for XYZ, and an external JAR that uses STDERR for ABC. I want to merge both so that they are formatted correctly for the end user, but I cannot figure out how to catch or red...

tcl exec reads stdout first then stderr?

Hi, I found tcl exec command returns string from stdout first then stderr. For example, my following "test script" generates messages in this order: puts "test started" puts stderr "some non-fatal error goes to stderr" puts "test passed" Then I execute the script like this: set ret [ catch { exec sh -c $cmd } msg ] and what I get...

bash variable capture stderr and stdout separately or get exit value

Hi, I need to capture the output and error of a command in my bash script and know whether the command succeeded or not. At the moment, I am capturing both like this: output=$(mycommand 2>&1) I then need to check the exit value of mycommand. If it failed, I need to do some stuff with the output, if the command succeeded, I don't nee...