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# frozen_string_literal: true
require 'ffi'
module Puma
module JRubyRestart
extend FFI::Library
ffi_lib 'c'
attach_function :execlp, [:string, :varargs], :int
attach_function :chdir, [:string], :int
attach_function :fork, [], :int
attach_function :exit, [:int], :void
attach_function :setsid, [], :int
def self.chdir_exec(dir, argv)
chdir(dir)
cmd = argv.first
argv = ([:string] * argv.size).zip(argv).flatten
argv << :string
argv << nil
execlp(cmd, *argv)
raise SystemCallError.new(FFI.errno)
end
PermKey = 'PUMA_DAEMON_PERM'
RestartKey = 'PUMA_DAEMON_RESTART'
# Called to tell things "Your now always in daemon mode,
# don't try to reenter it."
#
def self.perm_daemonize
ENV[PermKey] = "1"
end
def self.daemon?
ENV.key?(PermKey) || ENV.key?(RestartKey)
end
def self.daemon_init
return true if ENV.key?(PermKey)
return false unless ENV.key? RestartKey
master = ENV[RestartKey]
# In case the master disappears early
begin
Process.kill "SIGUSR2", master.to_i
rescue SystemCallError => e
end
ENV[RestartKey] = ""
setsid
null = File.open "/dev/null", "w+"
STDIN.reopen null
STDOUT.reopen null
STDERR.reopen null
true
end
def self.daemon_start(dir, argv)
ENV[RestartKey] = Process.pid.to_s
if k = ENV['PUMA_JRUBY_DAEMON_OPTS']
ENV['JRUBY_OPTS'] = k
end
cmd = argv.first
argv = ([:string] * argv.size).zip(argv).flatten
argv << :string
argv << nil
chdir(dir)
ret = fork
return ret if ret != 0
execlp(cmd, *argv)
raise SystemCallError.new(FFI.errno)
end
end
end
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