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require_relative 'abstract_process'
module ChildProcess
class ProcessSpawnProcess < AbstractProcess
attr_reader :pid
def exited?
return true if @exit_code
assert_started
pid, status = ::Process.waitpid2(@pid, ::Process::WNOHANG | ::Process::WUNTRACED)
pid = nil if pid == 0 # may happen on jruby
log(:pid => pid, :status => status)
if pid
set_exit_code(status)
end
!!pid
rescue Errno::ECHILD
# may be thrown for detached processes
true
end
def wait
assert_started
if exited?
exit_code
else
_, status = ::Process.waitpid2(@pid)
set_exit_code(status)
end
end
private
def launch_process
environment = {}
@environment.each_pair do |key, value|
key = key.to_s
value = value.nil? ? nil : value.to_s
if key.include?("\0") || key.include?("=") || value.to_s.include?("\0")
raise InvalidEnvironmentVariable, "#{key.inspect} => #{value.to_s.inspect}"
end
environment[key] = value
end
options = {}
options[:out] = io.stdout ? io.stdout.fileno : File::NULL
options[:err] = io.stderr ? io.stderr.fileno : File::NULL
if duplex?
reader, writer = ::IO.pipe
options[:in] = reader.fileno
unless ChildProcess.windows?
options[writer.fileno] = :close
end
end
if leader?
if ChildProcess.windows?
options[:new_pgroup] = true
else
options[:pgroup] = true
end
end
options[:chdir] = @cwd if @cwd
if @args.size == 1
# When given a single String, Process.spawn would think it should use the shell
# if there is any special character in it. However, ChildProcess should never
# use the shell. So we use the [cmdname, argv0] form to force no shell.
arg = @args[0]
args = [[arg, arg]]
else
args = @args
end
begin
@pid = ::Process.spawn(environment, *args, options)
rescue SystemCallError => e
raise LaunchError, e.message
end
if duplex?
io._stdin = writer
reader.close
end
::Process.detach(@pid) if detach?
end
def set_exit_code(status)
@exit_code = status.exitstatus || status.termsig
end
def send_term
send_signal 'TERM'
end
def send_kill
send_signal 'KILL'
end
def send_signal(sig)
assert_started
log "sending #{sig}"
if leader?
if ChildProcess.unix?
::Process.kill sig, -@pid # negative pid == process group
else
output = `taskkill /F /T /PID #{@pid}`
log output
end
else
::Process.kill sig, @pid
end
end
end
end
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