CODEWITHSUNDEEP
ruby-on-railscrubyubuntu
rjd
rjd

Reputation: 1806

Launching C executable via ruby script on Ubuntu server

I have a situation I need some assistance with. It involves ruby, rails, and a native c applications running on an Ubuntu server.

I am able to compile the c applications on the server and now need to know how to launch them via ruby script.

My end goal is to take lists of data from a rails app, save them to a specific .dat file on the server, use this file as the input to my executables (along with flags), and load the resulting files back through a ruby script into my rails app for display.

I'm currently looking at these to start:

Confirm existance of executable (script, bat, cmd, exe) via a ruby file

Launch a script on a separate server from a Rails app

Confirm existance of executable (script, bat, cmd, exe) via a ruby file

Ruby require_relative executing script?

If anyone has done anything like this or has ideas of how to do it please advise.

Upvotes: 0

Views: 106

Answers (1)

Serj
Serj

Reputation: 86

You can do like this

original_file_path = 'path/to/original_file.dat'
modified_file_path = 'path/to/modified_file.dat'

File.write(file_path, 'data')

#this will return an output from c program
#use this if you need to parse output from c program
result = `some_c_executable --some_flag #{file_path}`
#parsing result...
data = File.read(modified_file_path)
#work with data

Or

#if you don't need output from c program, use "system"
#it returns you true or false according to success
result = system "some_c_executable --some_flag #{file_path}"
if result
  data = File.read(modified_file_path)
  #work with data
else
  ...
end

Upvotes: 3

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