Real-time collaboration for Jupyter Notebooks, Linux Terminals, LaTeX, VS Code, R IDE, and more,
all in one place.

1
require 'open3'
2

3
module Msf
4
  module Util
5
    class ServiceHelper
6
      def self.run_cmd(cmd, input: nil, env: {}, debug: false)
7
        exitstatus = 0
8
        err = out = ""
9

10
        $stdout.puts "run_cmd: cmd=#{cmd}, input=#{input}, env=#{env}" if debug
11

12
        Open3.popen3(env, cmd) do |stdin, stdout, stderr, wait_thr|
13
          stdin.puts(input) if input
14
          if debug
15
            err = stderr.read
16
            out = stdout.read
17
          end
18
          exitstatus = wait_thr.value.exitstatus
19
        end
20

21
        if exitstatus != 0
22
          if debug
23
            $stdout.puts "'#{cmd}' returned #{exitstatus}"
24
            $stdout.puts out
25
            $stdout.puts err
26
          end
27
        end
28

29
        exitstatus
30
      end
31

32
      def self.process_active?(pid)
33
        begin
34
          Process.kill(0, pid)
35
          true
36
        rescue Errno::ESRCH
37
          false
38
        end
39
      end
40

41
      def self.tail(file)
42
        begin
43
          File.readlines(file).last.to_s.strip
44
        rescue
45
          nil
46
        end
47
      end
48

49
      def self.thin_cmd(conf:, address:, port:, ssl:, ssl_key:, ssl_cert:, ssl_disable_verify:,
50
                        env: 'production', daemonize:, log:, pid:, tag:)
51
        server_opts = "--rackup #{conf} --address #{address} --port #{port}"
52
        ssl_opts = ssl ? "--ssl --ssl-key-file #{ssl_key} --ssl-cert-file #{ssl_cert}" : ''
53
        ssl_opts << ' --ssl-disable-verify' if ssl_disable_verify
54
        adapter_opts = "--environment #{env}"
55
        daemon_opts = daemonize ? "--daemonize --log #{log} --pid #{pid} --tag #{tag}" : ''
56
        all_opts = [server_opts, ssl_opts, adapter_opts, daemon_opts].reject(&:empty?).join(' ')
57

58
        "thin #{all_opts}"
59
      end
60
    end
61
  end
62
end
63

64