Class: OsCtld::Commands::Container::Attach

Inherits:
Base
  • Object
show all
Includes:
OsCtl::Lib::Utils::Log, Utils::SwitchUser
Defined in:
lib/osctld/commands/container/attach.rb

Defined Under Namespace

Classes: Shell

Instance Attribute Summary

Attributes inherited from Base

#client, #client_handler, #id, #opts

Instance Method Summary collapse

Methods included from Utils::SwitchUser

#ct_attach, #ct_syscmd

Methods inherited from Base

#base_execute, #call_cmd, #call_cmd!, #error, #error!, handle, #handled, #indirect?, #initialize, #manipulate, #manipulation_holder, #ok, #progress, #request_stop, run, run!

Constructor Details

This class inherits a constructor from OsCtld::Commands::Base

Instance Method Details

#execute ⇒ Object 



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# File 'lib/osctld/commands/container/attach.rb', line 12

def execute
  ct = DB::Containers.find(opts[:id], opts[:pool])
  error!('container not found') unless ct
  error!('container not running') if ct.state != :running

  base_args = [
    'lxc-attach', '-P', ct.lxc_home,
    '-n', ct.id,
    '--clear-env',
    '--keep-var', 'TERM',
    '-v', 'USER=root',
    '-v', 'LOGNAME=root',
    '-v', 'HOME=/root',
    '-v', "PATH=#{SwitchUser::SYSTEM_PATH.join(':')}",
    '-v', 'HISTFILE=/root/.osctl_ct_attach_history'
  ]

  if opts[:user_shell]
    ok(ct_attach(ct, *base_args))

  else
    shell = find_shell(ct)
    error!('no supported shell located') unless shell

    ok(ct_attach(
         ct,
         *base_args,
         '--keep-var', 'LANG',
         '-v', "PS1=#{prompt(ct, shell)}",
         '--',
         *shell_args(shell)
       ))
  end
end

#find_shell(ct) ⇒ Object (protected) 



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# File 'lib/osctld/commands/container/attach.rb', line 49

def find_shell(ct)
  rootfs = File.join('/proc', ct.init_pid.to_s, 'root')

  %i[bash busybox sh].each do |type|
    path = DistConfig.run(ct.get_run_conf, :bin_path)

    begin
      File.lstat(File.join(rootfs, path, type.to_s))
    rescue Errno::ENOENT
      next
    end

    return Shell.new(type, File.join(path, type.to_s))
  end

  nil
end

#prompt(ct, shell) ⇒ Object (protected) 



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# File 'lib/osctld/commands/container/attach.rb', line 80

def prompt(ct, shell)
  case shell.type
  when :bash
    "\\n\\[\\033[1;31m\\][CT #{ct.id}]\\[\\033[0m\\] " \
    '\\[\\033[1;95m\\]\\u@\\h:\\w\\$\\[\\033[0m\\] '

  when :busybox
    "\\n[CT #{ct.id}] \\u@\\h:\\w\\$ "

  when :sh
    "\\n[CT #{ct.id}] $USER@$HOSTNAME:$PWD\\$ "
  end
end

#shell_args(shell) ⇒ Object (protected) 



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# File 'lib/osctld/commands/container/attach.rb', line 67

def shell_args(shell)
  case shell.type
  when :bash
    [shell.executable, '--norc']

  when :busybox
    [shell.executable, 'sh']

  when :sh
    [shell.executable]
  end
end