10,342 questions
Advice
0
votes
6
replies
127
views
Capture stderr while passing stdout to a pipe
My question is similar to How can I pipe stderr, and not stdout?
The following captures ALL the output from the cat command in a variable
_output="$(cat "$_filename" 2>&1)"
...
- reputation score 417
Score of -3
2 answers
101 views
Non-closing read from pipe, socket, or FIFO in terminal window or in shell
I don't know much about these things, but I understand that tools like nc and socat are used for reading from sockets/FIFOs. What I want to do is this:
I have socket/FIFO/whatever-the-appropriate-...
- reputation score 3094
Score of -3
2 answers
121 views
Can pipe buffer limits be increased from inside a container? [closed]
In Linux, can a process inside a docker container increase a pipe buffer size beyond the maximum configured in the host OS?
I'm trying to write code to stream files between two different network ...
- reputation score 5158
Score of -1
2 answers
130 views
How to detect *every* kind of error when printing to a pipe, including missing write permissions?
On this site and elsewhere, there are quite a few questions about how to handle errors when printing to a pipe in Perl. But none of the answers, solutions and explanations I have seen so far are ...
- reputation score 4643
Score of 1
1 answer
117 views
In shell pipes, maintaing resilience against orphaned process and buggy applications
Further note: The inconsistencies have been identified as due to an interface change in the tool, less that breaks backward compatibility. Beginning with version 603, it is required to provide the ...
- reputation score 804
Score of 0
0 answers
52 views
Check if shell script/function is being piped into without false positives [duplicate]
I've searched around about how one can write a shell script (preferably cross-shell, but also in bash) that detects if it is being piped into so that it's operation can be changed accordingly. The ...
- reputation score 3094
Score of 0
0 answers
85 views
Piping into interactive shell
I need to issue a lot of, say, wget commands manually. I figured the following would make it convenient:
$ sed 's/.*/wget &/g' | bash -i
Indeed, stdin is now listening to my input as I copy-paste ...
- reputation score 3276
Score of 5
1 answer
174 views
How do I set redirected pipes to be non-buffered so I can use system() multiple times?
TLDR: I need to make unix pipes non-buffered so one subprocess can run multiple execs.
Hello, this is for a school assignment on UNIX pipes that I am having trouble with.
We are asked to make a 3 ...
- reputation score 63
Score of 3
5 answers
278 views
`printf` and `xargs` in a `for` loop
I want to produce this output:
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
For that I created this script:
(Based on https://stackoverflow.com/a/23961301/22133250)
...
- reputation score 449
Score of 1
1 answer
141 views
Bash command interpretation
I am creating a program that will simulate a pipe, for this i am checking the argument i have as input for this commands:
I am on Ubuntu, the shell is zsh.
I need to code this programm in C.
I have a ...
- reputation score 114
Score of -1
1 answer
118 views
How to correctly pass dynamically built command arguments to exec.Command in Go?
I am building a CLI tool for docker compose to selectively exclude some containers from running/stopping operations (from a docker-compose.yaml having many containers, user can specify the containers ...
- reputation score 941
Score of 3
1 answer
145 views
Java shell pipeline: `head` command doesn't output lines until it receives the expected number, even with `tail -f`
I'm building a shell in Java and currently implementing pipeline logic. For inter-process communication, I've created this class:
public class PipeConnector implements Runnable {
private final ...
- reputation score 43
Advice
0
votes
6
replies
105
views
Parsing pipes with boolean logic operators in bash
I'm investigating how Bash parsing works. Let's assume that all lower-case letters here represent scripts that always return a successful exit status - 0. The contents of all scripts are identical. ...
- reputation score 33
Score of 1
0 answers
245 views
Is it possible to set stdin of a process to a pipe and the rest to a TTY device?
I am trying to spawn a process so that I can do the following:
Send text to its standard input and specify EOF by closing the stdin pipe.
Connect the process' stdout and stderr to a TTY device so ...
- reputation score 163
Score of 0
1 answer
110 views
Named pipe is inaccessible while open from writer
I am trying to use the lauterbach application
The application has a built in command AREA.PIPE which pipes everything from the log window to a file
However, when I create a python script to read from ...
- reputation score 19