- 1 year ago
Forwarding stdin to a subprocess in Ruby on Windows
To forward stdin
to a subprocess in Ruby on Windows, you can use the built-in Open3
module, which allows you to handle subprocesses more flexibly. Here's an example of how you can achieve this:
rubyrequire 'open3'
subprocess_cmd = 'your_subprocess_command_here'
Open3.popen2(subprocess_cmd) do |stdin, stdout_err, wait_thr|
stdin.puts "Input to be sent to the subprocess"
stdin.close # Signal the end of input
# Read the output from the subprocess
while line = stdout_err.gets
puts line
end
exit_status = wait_thr.value
puts "Subprocess exited with status: #{exit_status}"
end
Replace 'your_subprocess_command_here'
with the actual command you want to execute as a subprocess.
In this example, we're using the popen2
method from the Open3
module. It provides handles to the standard input (stdin
), standard output (stdout_err
), and a wait_thr
object to handle the subprocess and its exit status.
Remember that the Open3
module is part of the Ruby standard library, so no additional gems are required.
Please note that this example demonstrates basic input and output forwarding. Depending on your specific requirements and the behavior of the subprocess, you might need to handle the interaction more intricately, including handling errors, timeouts, and potential blocking situations.