我编写了这段代码来在守护进程中运行我的进程。目标是即使我关闭它的父进程也使这个进程运行。现在,我希望能够在其标准输入中写一些东西。我应该怎么办 ?这是代码。
def daemonize(cmd, options = {})
rd, wr = IO.pipe
p1 = Process.fork {
Process.setsid
p2 = Process.fork {
$0 = cmd #Name of the command
pidfile = File.new(options[:pid_file], 'w')
pidfile.chmod( 0644 )
pidfile.puts "#{Process.pid}"
pidfile.close
Dir.chdir(ENV["PWD"] = options[:working_dir].to_s) if options[:working_dir]
File.umask 0000
STDIN.reopen '/dev/null'
STDOUT.reopen '/dev/null', 'a'
STDERR.reopen STDOUT
Signal.trap("USR1") do
Console.show 'I just received a USR1', 'warning'
end
::Kernel.exec(*Shellwords.shellwords(cmd)) #Executing the command in the parent process
exit
}
raise 'Fork failed!' if p2 == -1
Process.detach(p2) # divorce p2 from parent process (p1)
rd.close
wr.write p2
wr.close
exit
}
raise 'Fork failed!' if p1 == -1
Process.detach(p1) # divorce p1 from parent process (shell)
wr.close
daemon_id = rd.read.to_i
rd.close
daemon_id
end
有没有办法在管道之类的东西中重新打开标准输入,而不是 /dev/null 我可以在其中写入?