Class: CMD

Inherits:
Hash
  • Object
show all
Defined in:
lib/cmd.rb,
lib/cmd_windows.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(cmd, options = nil) ⇒ CMD

Returns a new instance of CMD.



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# File 'lib/cmd.rb', line 10

def initialize(cmd, options=nil)
 initialize_defaults if(@@default_options.nil?)
 self[:output] = ''
 self[:error] = ''
 
 #1) SIGHUP       2) SIGINT       3) SIGQUIT      4) SIGILL

 #5) SIGTRAP      6) SIGABRT      7) SIGBUS       8) SIGFPE

 #9) SIGKILL     10) SIGUSR1     11) SIGSEGV     12) SIGUSR2

 #13) SIGPIPE     14) SIGALRM     15) SIGTERM     17) SIGCHLD

 #18) SIGCONT     19) SIGSTOP     20) SIGTSTP     21) SIGTTIN

 #22) SIGTTOU     23) SIGURG      24) SIGXCPU     25) SIGXFSZ

 #26) SIGVTALRM   27) SIGPROF     28) SIGWINCH    29) SIGIO

 #30) SIGPWR      31) SIGSYS      34) SIGRTMIN    35) SIGRTMIN+1

 #36) SIGRTMIN+2  37) SIGRTMIN+3  38) SIGRTMIN+4  39) SIGRTMIN+5

 #40) SIGRTMIN+6  41) SIGRTMIN+7  42) SIGRTMIN+8  43) SIGRTMIN+9

 #44) SIGRTMIN+10 45) SIGRTMIN+11 46) SIGRTMIN+12 47) SIGRTMIN+13

 #48) SIGRTMIN+14 49) SIGRTMIN+15 50) SIGRTMAX-14 51) SIGRTMAX-13

 #52) SIGRTMAX-12 53) SIGRTMAX-11 54) SIGRTMAX-10 55) SIGRTMAX-9

 #56) SIGRTMAX-8  57) SIGRTMAX-7  58) SIGRTMAX-6  59) SIGRTMAX-5

 #60) SIGRTMAX-4  61) SIGRTMAX-3  62) SIGRTMAX-2  63) SIGRTMAX-1

 #64) SIGRTMAX

 self[:timeout_signal] = 2
 self[:timeout_raise_error] = true
 
 @@default_options.each { |key, value| self[key] = value}
 options.each { |key, value| self[key] = value} unless(options.nil?)
 self[:command]=cmd
end

Class Method Details

.default_options(hash) ⇒ Object 



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# File 'lib/cmd.rb', line 40

def self.default_options(hash)
  hash.each { |key, value| @@default_options[key] = value}
end

Instance Method Details

#call_capture ⇒ Object 



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# File 'lib/cmd.rb', line 124

def call_capture
  elapsed_time = nil
  begin
    if(key?(:timeout))
   start_time = Time.now
Thread.new do
  while !key?(:exit_code) do
    sleep(0.1)        
  if((Time.now - start_time).to_f > self[:timeout])
    self[:timed_out] = true
    interrupt
    sleep(0.1)
    break
  end
  end
      end
 end

 self[:output] = self[:error] = ''
 elapsed_time = Benchmark.realtime do
   self[:output], self[:error], status = Open3.capture3(self[:command])
   self[:exit_code] = status.to_i 
 end
  
 raise TimeoutError.new("Command '#{self[:command]}' timed out after #{self[:timeout]} seconds") if(key?(:timed_out) && self[:timeout_raise_error])
  rescue Exception => e
 self[:error] = "#{self[:error]}\nException: #{e.to_s}"
 self[:exit_code]=1 unless(!self[:exit_code].nil? || (self[:exit_code] == 0))
  ensure
 self[:elapsed_time] = elapsed_time unless(elapsed_time.nil?)
  end
end

#call_popen ⇒ Object 



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# File 'lib/cmd.rb', line 71

def call_popen
  begin
    output = ''
 error = ''  
 Thread.abort_on_exception = true
 mutex = Mutex.new
 
 Open3.popen3(self[:command]) do |stdin, stdout, stderr, wait_thr|
      self[:pid] = wait_thr.pid 

if(key?(:timeout))
  start_time = Time.now
  Thread.new do
    while wait_thr.alive? do
        sleep(0.1)
    if((Time.now - start_time).to_f > self[:timeout])
    self[:timed_out] = true
    interrupt
    sleep(0.1)
    end
  end
  end
      end

      {:output => stdout,:error => stderr}.each do |key, stream|
        Thread.new do         
    while wait_thr.alive? && !key?(:timed_out) do
      if(!stream.closed? && !(char = stream.getc).nil?)
      case key
        when :output
          output << char
      putc char if(self[:echo_output])
        when :error
          error << char
      end
      else
        sleep(0.1)
    end
       end
  end
end

wait_thr.join

   self[:output] = output unless(output.empty?)         
self[:error] = error unless(error.empty?)
self[:exit_code] = wait_thr.value.to_i    
 end
  rescue Exception => e
 self[:error] = "#{self[:error]}\nException: #{e.to_s}"
 self[:exit_code]=1 unless(self[:exit_code].nil? || (self[:exit_code] == 0))
  end
end

#command_pid ⇒ Object 



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# File 'lib/cmd.rb', line 156

def command_pid
  Sys::ProcTable.ps do |p| 
 if(p.ppid == $$) 
return self[:pid] = p.pid
 end
  end

  raise "Failed to find child process for command: '#{self[:command]}'"
end

#execute ⇒ Object

Raises:



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# File 'lib/cmd.rb', line 44

def execute
  if(self[:quiet])
 self[:echo_output] = false
 self[:echo_command] = false
  end
  
  puts self[:command] if(self[:echo_command] || self[:debug])
  #call_popen  

  call_capture
  
  if(self[:debug])
 puts "command: #{self[:command]}"
 puts "output: #{self[:output]}"
 puts "error: #{self[:error]}"
 puts "exit_code: #{self[:exit_code]}"
  end
  
  raise TimeoutError.new("Command '#{self[:command]}' timed out after #{self[:timeout]} seconds") if(key?(:timed_out) && self[:timeout_raise_error])

  if((self[:exit_code] != 0) && !self[:ignore_exit_code])
 exception_text = "Exit code: #{self[:exit_code]}"
 exception_text = "#{exception_text}\nError: '#{self[:error]}'"
 exception_text = "#{exception_text}\nOutput: '#{self[:output]}'"
 raise StandardError.new(exception_text) 
  end
end

#execute_as(username) ⇒ Object 



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# File 'lib/cmd_windows.rb', line 6

def execute_as(username)
  self[:command] = "runas /noprofile /savecred /user:#{username} \"#{self[:command]}\""
  wait_on_spawned_process(self) { self.execute }
end

#get_child_processes(pid) ⇒ Object

Process.waitpid(self) unless(Sys::ProcTable.ps(self).nil?)



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# File 'lib/cmd.rb', line 176

def get_child_processes(pid)
  processes = []
  Sys::ProcTable.ps do |p| 
 if(p.ppid == pid) 
get_child_processes(p.pid).each { |cp| processes << cp }
processes << p
 end
  end
  return processes
end

#interrupt ⇒ Object 



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# File 'lib/cmd.rb', line 165

def interrupt
  self[:pid] = command_pid unless(key?(:pid))
  raise "Do not have a process id for #{self[:pid]}" unless(key?(:pid))
  processes = get_child_processes(self[:pid])
  
  Process.kill(self[:timeout_signal],self[:pid])
  sleep(0.1)
  processes.each { |p| Process.kill(self[:timeout_signal],p.pid) unless(Sys::ProcTable.ps(p.pid).nil?) }
  #

  #Process.waitpid(self[:pid]) unless(Sys::ProcTable.ps(self[:pid]).nil?) 

end