Open3 grants you access to stdin, stdout, stderr and a thread to wait the child process when running another program.
Open3 grants you access to stdin, stdout, stderr and a thread to wait the child process when running another program
Questions tagged [popen3]
69 questions
0
votes
1 answer
Simulating command prompt commands
"Answering a cli prompt in ruby with open3?" is a possible duplicate question but it has no answer.
I need to write a program which compiles and executes a C program, gives inputs and returns the output. So far I came up with this:
For single…
Azam Ikram
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votes
2 answers
Running cmd commands through ruby
I am writing a program which execute an other program written in c, here is my first try
require 'Open3'
system 'tcc temp.c'
Open3.popen3('temp.exe') do |stdin, stdout, stderr|
stdin.puts '21\n'
STDOUT.puts stdout.gets
end
actual…
Azam Ikram
- 185
- 1
- 1
- 10
0
votes
1 answer
How to execute subprocesses in Ruby as fast as possible?
We have a Rails application, which interfaces with iOS and web clients. Currently we are spawning subprocesses from a Rails controller using Open3 to retrieve and send data to a chat server, which running node.js with MongoDB. However, after a few…
uohzxela
- 613
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0
votes
2 answers
Ruby - Open3 not finishing subprocess
I'm using:
- Ruby 1.9.3-p448
- Windows Server 2008
I have a file that contains commands that is used by a program, I'm using it in this way
C:\> PATH_TO_FOLDER/program.exe file.txt
File.txt have some commands so program.exe will do the…
JavierQQ23
- 704
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0
votes
0 answers
Ruby on Rails. Returning output of exe file to browser
First time using Ruby or Rails, so bear with me :) I am trying to output the results of an exe file to my browser, possibly with some processing before hand. I am using Open3
@stdout,@stderr,@status = Open3.capture3('c:\server.exe','')
This works,…
Horse
- 3,023
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0
votes
1 answer
Losing STDOUT when using Open3.capture3 and rake?
A build system that I use at work invokes several external console applications, Node.js among others.
The issue I am seeing is the STDOUT channel seems to not work after Open3.capture3 is invoked. For instance, I have a task called…
MattSaw
- 451
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- 11
0
votes
1 answer
trying to check if command exists with ruby popen3
I am trying to check if system command exists with following code:
require 'open3'
Open3.popen3('non-existing command') do |stdin, stdout, stderr, thread|
exit_error = stderr.readlines
if exit_error["No such file or directory"]
puts…
Pavel K.
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votes
1 answer
Open executable and manage its streams?
I'm trying to open a Ruby script that prompts for stuff with popen3, for testing purposes.
I need to be able to type into the STDIN of the proccess and inspect the outputs. So far I have this:
require 'open3'
def run(executable, opts = {})
…
ichigolas
- 7,595
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0
votes
1 answer
Ruby on Rails call to perl script timing out
I'm am writing a Ruby on Rails application that is calling a perl script using Open3. However, when calling the perl script my app keeps raising a Timeout::Error sooner than I want. The code where I call the script looks like this:
…
Chris
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