Module: Knj::Os

Defined in:
lib/knj/os.rb

Class Method Summary collapse

Class Method Details

.chdir_file(filepath) ⇒ Object 



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# File 'lib/knj/os.rb', line 58

def self.chdir_file(filepath)
  if File.symlink?(filepath)
    Dir.chdir(File.dirname(File.readlink(filepath)))
  else
    Dir.chdir(File.dirname(filepath))
  end
end

.check_display_env ⇒ Object

Checks if the display variable and xauth is set - if not sets it to the GDM xauth and defaults the display to :0.0.



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# File 'lib/knj/os.rb', line 135

def self.check_display_env
  ret = {}
  
  if ENV["DISPLAY"].to_s.strip.length <= 0
    x_procs = Knj::Unix_proc.list("grep" => "/usr/bin/X")
    set_disp = nil
    
    x_procs.each do |x_proc|
      if match = x_proc["cmd"].match(/(:\d+)/)
        set_disp = match[1]
        break
      end
    end
    
    raise "Could not figure out display." if !set_disp
    
    ENV["DISPLAY"] = set_disp
    ret["display"] = set_disp
  else
    ret["display"] = ENV["DISPLAY"]
  end
  
  if !ENV["XAUTHORITY"]
    res = Knj::Os.xauth_file
    ENV["XAUTHORITY"] = res
    ret["xauth"] = res
  else
    ret["xauth"] = ENV["XAUTHORITY"]
  end
  
  return ret
end

.class_exist(classstr) ⇒ Object 



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# File 'lib/knj/os.rb', line 50

def self.class_exist(classstr)
  if Module.constants.index(classstr) != nil
    return true
  end
  
  return false
end

.executed_cmd ⇒ Object

Returns the command used to execute the current process.



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# File 'lib/knj/os.rb', line 169

def self.executed_cmd
  return ENV["SUDO_COMMAND"] if ENV["SUDO_COMMAND"]
  
  proc_self = Knj::Unix_proc.find_self
  cmd = proc_self["cmd"]
  
  cmd.gsub!(/^ruby([\d\.]+)/, ENV["_"]) if ENV["_"]
  
  return cmd
end

.executed_executable ⇒ Object

Returns the Ruby executable that is running the current process if possible.



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# File 'lib/knj/os.rb', line 181

def self.executed_executable
  return ENV["rvm_ruby_string"] if ENV["rvm_ruby_string"].to_s.length > 0
  
  #Try to look the executeable up by command.
  if self.os == "linux"
    unix_proc = Knj::Unix_proc.find_self
    if unix_proc
      if match_cmd = unix_proc["cmd"].match(/^(\/usr\/bin\/|)((j|iron|)ruby([\d\.-]+))(\s+|$)/)
        return "#{match_cmd[1]}#{match_cmd[2]}"
      end
    end
  end
  
  raise "Could not figure out the executed executable."
end

.homedir ⇒ Object 



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# File 'lib/knj/os.rb', line 2

def self.homedir
  if ENV["USERPROFILE"]
    homedir = ENV["USERPROFILE"]
  else
    homedir = File.expand_path("~")
  end
  
  if homedir.length <= 0
    raise "Could not figure out the homedir."
  end
  
  return homedir
end

.mode ⇒ Object 



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# File 'lib/knj/os.rb', line 46

def self.mode
  raise "stub!"
end

.os ⇒ Object 



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# File 'lib/knj/os.rb', line 30

def self.os
  if ENV["OS"]
    teststring = ENV["OS"].to_s
  elsif RUBY_PLATFORM
    teststring = RUBY_PLATFORM.to_s
  end
  
  if teststring.downcase.index("windows") != nil
    return "windows"
  elsif teststring.downcase.index("linux") != nil
    return "linux"
  else
    raise "Could not figure out OS."
  end
end

.realpath(path) ⇒ Object 



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# File 'lib/knj/os.rb', line 66

def self.realpath(path)
  if File.symlink?(path)
    return self.realpath(File.readlink(path))
  end
  
  return path
end

.shellcmd(cmd) ⇒ Object

Runs a command and returns output. Also throws an exception of something is outputted to stderr.



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# File 'lib/knj/os.rb', line 75

def self.shellcmd(cmd)
  res = {
    :out => "",
    :err => ""
  }
  
  if RUBY_ENGINE == "jruby"
    IO.popen4(cmd) do |pid, stdin, stdout, stderr|
      res[:out] << stdout.read
      res[:err] << stderr.read
    end
  else
    Open3.popen3(cmd) do |stdin, stdout, stderr|
      res[:out] << stdout.read
      res[:err] << stderr.read
    end
  end
  
  if res[:err].to_s.strip.length > 0
    raise res[:err]
  end
  
  return res[:out]
end

.subproc(cmd) ⇒ Object

Runs a command as a process of its own and wont block or be depended on this process.



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# File 'lib/knj/os.rb', line 101

def self.subproc(cmd)
  cmd = cmd.to_s + "  >> /dev/null 2>&1 &"
  %x[#{cmd}]
end

.whoami ⇒ Object 



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# File 'lib/knj/os.rb', line 16

def self.whoami
  if ENV["USERNAME"]
    whoami = ENV["USERNAME"]
  else
    whoami = %x[whoami].strip
  end
  
  if whoami.length <= 0
    raise "Could not figure out the user who is logged in."
  end
  
  return whoami
end

.xauth_file ⇒ Object

Returns the xauth file for GDM.



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# File 'lib/knj/os.rb', line 107

def self.xauth_file
  authfile = ""
  
  if File.exists?("/var/run/gdm")
    Dir.foreach("/var/run/gdm") do |file|
      next if file == "." or file == ".." or !file.match(/^auth-for-gdm-.+$/)
      authfile = "/var/run/gdm/#{file}/database"
    end
  end
  
  if File.exists?("/var/run/lightdm")
    Dir.foreach("/var/run/lightdm") do |file|
      next if file == "." or file == ".."
      
      Dir.foreach("/var/run/lightdm/#{file}") do |f2|
        authfile = "/var/run/lightdm/#{file}/#{f2}" if f2.match(/^:(\d+)$/)
      end
    end
  end
  
  if authfile.to_s.length <= 0
    raise "Could not figure out authfile for GDM."
  end
  
  return authfile
end