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Questions tagged [stdout]

The standard output stream (stdout) is the stream where a program writes its output data.

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Silence docker rm command in bash

I tried docker container rm container-name > /dev/null but this still prints Error: No such container: container-name. I'm trying to silence this error in my bash script.
Dave
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Python code hangs when using a subprocess with a large amout of output to stdout

I have a subprocess that can output a lot of data to stdout. When too much data is generated it causes the subprocess to hang since it is waiting for the stdout buffer to be emptied. Here is a small example…
Calab
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Why does the shell output go to stderr?

I'm using the subprocess module from python and whenever I call any of the methods that subprocess has to run, in this case some bash code on the shell, the output (lets say from a command e.g iwconfig) is redirected to stderr. Shouldn't the output…
VladiC4T
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C# process to get image from ffmpeg stdout

We need to read some RTSP streams in C# using ffmpeg and pipe the stdout to a MemoryStream. We need to get a snapshot out of each stream. Here's my code so far: var arguments = $@" -y -i {imageUri.AbsoluteUri} -vframes 1 -pix_fmt yuvj420p -vf…
Alex
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Printing output of python script to Windows console, when running via batch file

I have tried to look at other resources on SO but none seem to solve my problem: Executing Python Script From Command Line is Hiding Print Statements How do I write output in same place on the console? Python script doesn't print output in command…
Julian Drago
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bash linux - write and read from stdin and stdout

I have an application which I can run from the commonand line and it acts like a CLI for me. However its part of a suite of applications and now I want them all to run on boot up and so they are being started as a service (systemd). So all my apps…
code_fodder
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How to terminate the logging process inside a shell script withput stopping the script?

I am working with a shell script to run my analyses. To make sure, I can confirm the correct commands were executed, I am writing the complete STDOUT/STDERR output into a file My script looks like that: #!/bin/bash # Here are some pliminary…
Assa Yeroslaviz
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python redirect stdout with print function, is it possible to extend to multiple outputs, and what's the timing?

I have read several questions on how to use print function to write on file by redirecting standard output. I find it potentially useful for logging (where logging module is sometimes inconvenient), but I wonder if there is a way to send the output…
Vincenzooo
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Why redirecting to stdout with dup2 works only if printf was called before redirecting

I'm trying to write a program that connects to a server opened with nc -v -l 1337 on another terminal, and redirects stdin, stdout, stderr to the socket. Meaning, the other terminal will write to the socket, and my program will read it with…
Nadav G
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Process.Start does not redirect message to the parent context hosted by docker?

This issues has taken me one day, really I just thought it's simple at first. I have a host machine (Windows 10) with Docker desktop for Windows installed. From the host machine, I would like to use docker run to start a container which contains…
Hopeless
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C# Do I need to read stdout on separate thread?

In C#, I am trying to run a command line program that gets input from stdin and then it returns the output to stdout . I need to keep cmd.exe running (using /k) and in a for loop, send in text and then wait for the output before sending the next…
dmkoher
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Python how do I print value instead of prompt

I keep running into a _stdout error with a print statement within the browser IDE provided by Pearson, yet the error does not occur when using Wing 101 IDE. I need the print statement to only output each variable (an integer(k), a double(d), and a…
Kait
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Unable to read stdout from python with popen in lua

I am trying to read the stdout of a simple python script import time while True: print("test") time.sleep(1) with the following lua code local p = assert(io.popen("/usr/bin/python test.py", "r")) if not p then …
James Marlow
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Python: Capture stdout of crashed program via subprocess

I have a simple C program that asks for input and echoes it back, so essentially a gets and then a printf. I want to call this program through Python subprocess and capture the output - even when the C program crashes (trying to overflow the buffer…
user1683766
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Grep python output stream (tried print and stdout)

This answer says it's as simple as: pipe python logging stdout stream output to grep python main.py 2>&1 | grep INFO I have the following file, which I've tried with print() and sys.stdout.write(). import sys from time import sleep while True: …
Alexander Kleinhans
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