All Questions
236
questions
0
votes
0
answers
36
views
asio::stream_descriptor for async read from stdin in raw mode crashes
I want to poll stdin asynchronously for terminal keyboard events, hence the following
/* class tui contains a member 'stdin_' of type 'asio::stream_descriptor',
initialized as such : stdin_{...
- 23
1
vote
1
answer
62
views
Piping input into running Python script
Maybe this is the wrong approach, so feel free to redirect.
I am trying to asynchronously pipe input into a python script. The idea is that I have a background Python script do some long initial setup ...
- 69
3
votes
1
answer
202
views
Reading and Writing more than 4096 bytes to and from STDIN [closed]
I'm trying to implement a here document like the one used in bash (in C), but I noticed that I can't give it a line that's longer than 4096 bytes, I looked it up and It was because of the max size of ...
- 59
0
votes
0
answers
85
views
How to execute process with mmap-ed memory as stdin and another mmap-ed memory as stdout?
It is possible in Linux execute process with mmap-ed memory as stdin and another mmap-ed memory as stdout, so parent program can preallocate memory for stdin, write necessary data, execute program and ...
- 101
1
vote
2
answers
37
views
How to apply the linux 'file' command to the output (STDOUT) of a program to determine its file type
I want to determine the file-type of the contents of the STDOUT output of a program (without first saving the output to a file)
i.e., notionally, I would like to run: myprogram | file
However, `/usr/...
- 21
0
votes
1
answer
188
views
x86_64 nasm read syscall isn't null-terminated
x86_64 nasm read syscall isn't null-terminated
New to assembly. In fact this is my first hello world program.
OS: Arch Linux (64-bit)
Logic
I have three functions. strlen, stdin and stdout.
strlen:
...
- 11
0
votes
1
answer
55
views
Why isn't my output maintaining integrity after a pipe to a program that takes input from stdin?
My output gets corrupted when I try to pipe some output to another command in the shell. This doesn't happen when I execute the executable alone, or redirect its output to a program that doesn't care.
...
0
votes
1
answer
33
views
Is there a way to get the command ran to get stdin output in python?
So I've found a way to read from stdin in python, which is as follows:
if not sys.stdin.isatty():
stdin = sys.stdin.read()
but for a statement like this,
echo Hello | program.py
I only get stdin ...
0
votes
0
answers
88
views
(C++) How to have stdout update in real time without affecting stdin
I'm trying to make a simple chat program in the Linux terminal. For simplicity, the "users" are just multiple instances of the terminal on a single machine. However, I don't know how to ...
0
votes
0
answers
91
views
When I change stdin to raw mode, stdout is affected... why?
I have a Linux program that I need to change stdin to raw mode. I use this code:
if (isatty(STDIN_FILENO)) {
if (tcgetattr(STDIN_FILENO,&tiostdin) != 0) {
perror("...
- 936
1
vote
3
answers
458
views
Why do shell scripts not behave the same when called from node.js?
My problem
I have a simple sh script that behaves exactly as I want, unless it's called from a node.js script.
What the sh script is supposed to do
Convert the (potentially binary) data passed via ...
- 15.2k
-1
votes
3
answers
1k
views
How to pass password using -S (stdin) in terminal?
i am trying to pass the password using stdin but I am getting an error.
Here is what I tried.
echo myPassword | sudo -S su - userName -s /bin/bash
echo 'myPassword' | sudo -S su - userName -s /bin/...
- 4,104
0
votes
1
answer
272
views
How to write a char to the stdin in C?
I'm making a minishell and I have to create in C a command as "<<" in bash.
So I have to enter some input in the terminal and redirect it to the standard input but I'm having problems ...
- 39
1
vote
1
answer
147
views
Redirection Operators: two cases
Consider the following command line:
cat <<< "Hello World" > output1.txt > output2.txt ... > outputn.txt
In this case we have <<< here-string operator, which is ...
- 27
2
votes
1
answer
279
views
Go Lang: Can't change children's stdin
I want to completelly drop STDIN in parent and children processes.
CONTEXT:
I am spawning children process from main Go process. It is spawned in Go routine. Somehow FDs (stdin in this case) are ...
- 74