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Questions tagged [stderr]

The standard error output stream (stderr) is typically used by a program to output error messages or diagnostics.

The standard error stream, stderr, is a stream typically used by a program to output error or diagnostic messages. It is one of the three standard streams used by a UNIX-like program, along with and .

Like , stderr is outputted to the text terminal unless redirected.

The file descriptor for standard output is 2 (two); the POSIX definition is STDERR_FILENO.

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temporary redirect stderr to null on windows platform within a c code.

I need the equivalent of this for the windows platform, any pointers please ? This is what I have followed for *nix platforms and it seems to be working so far.The link can be found here
bhavs
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How to redirect stdout and stderr output from command prompt ONLY when there is an error?

I have a batch file (.cmd file) with millions of rename commands on each line. Each line is a UNC path from a database with a new name based on the extension listed in the table. Anyhow, I am ware that if I add 2>&1 then I can get the stderr and…
iTee
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Not seeing any java logging after creating an object

I am extending functionality of a Java project that I inherited that has logging implemented using a class Log that wraps java.util.logging.Logger: import java.util.logging.*; public class Log { // ... private final Logger log; I am…
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Is there any console output type other than stdout and stderr?

I run a a program in command line (unix/linux). But I need to get the results into a file. So i used. program_name >> result.txt But it didn't give anything to the file. Then I tried. program_name 2>> result.txt Then I got a portion of the results…
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cocoa-applescript - background process shell command

I have built a program which involves pinging specified IP addresses to tell whether they are active or not. repeat for IPaddress in allIPaddresses try do shell script "ping -o -t 1 -c 1 " & IPaddress set goodIPs to (goodIPs & IPaddress) --…
DJpotato
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Using subprocess to call R from Python, want to keep STDOUT and ignore STDERR

So this code in Python that I have currently works in returning my STDOUT in the variable "run": run = subprocess.check_output(['Rscript','runData.R',meth,expr,norm]) But it still prints to the screen all this ugly text from having to install a…
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R: Identical SE values for all slopes in an lm

I'm relatively new to R, and I just encountered a problem that I haven't before. I ran an lm with species richness as the response variable and elevation level (I have five of them ranging from 3000 m to 5000 m; it's a categorical variable) as the…
Yadugiri
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Redirecting stdout, stderror to file while stderr still prints to screen

I would like stdout and stderr to be redirected to the same file, while stderr still writes to the screen. What's the most pythonic way to do this?
pythonic metaphor
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Bash+cron: Redirecting, and restoring, stdout and stderr produces permission denied

I've got a script that calls out to a bunch of commands, some of which are noisy to stdout, some to stderr, some to both. I intend the script to be run by cron, so I don't want it to be noisy and mail me every day -- only in error conditions. So I…
arantius
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Getting STDerr and STDout into a log file inside of a bash script

I was wondering if it is possible to get all of what is outputted from a script I have made to go to a log file if they change one of the variables in the script. Example, in the script a variable createLog=true could be set to enable logging. I…
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Redirect stderr to stdout in a middle of running

The formal way to redirect stderr to stdout in a cmd script is to use the 2>&1 option before running the script: e.g. MyScript.cmd > output.txt 2>&1 Is there a way to redirect stderr to stdout in a middle of running? (Pushing my code to a main…
elady
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Python Catching Popen Output

I'm experiencing some strange behavior with my Python script exiting without any error messages. Based on my debugging it is happening around a popen() call to scp a file to a server. The code was (I was not the original…
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Python logging check if errors occured

I use logging.basicConfig(format='%(levelname)s %(asctime)s %(message)s', level=logging.INFO) to activate logging of INFO and higher logging levels. Is there a possibility to check at the end of my Python script if errors occured and exit the…
Daniel
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Redirect only stderr to /dev/null while redirecting stdout to a file (zsh)

I have a command cmd that I want to use in a zsh script in the form: cmd -opt val > info.txt but I want to redirect stderr from that one line to /dev/null. Evidently the following does not work: cmd -opt val > info.txt > /dev/null How to do…
murray
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Capture and inherit stdout and stderr using std::process::Command

With Rust it's very easy to run a command that either inherits stdout and stderr OR captures them. Is there a way I can do both simultaneously (and in real-time)?
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