Sha256: 0065d31c0e1b5766f8d9b78c2e43b07b1e3e4e8200a1c3d61de254e64cd014bc
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Size: 1.87 KB
Versions: 18
Compression:
Stored size: 1.87 KB
Contents
# frozen_string_literal: true
module Racecar
class Daemon
attr_reader :pidfile
def initialize(pidfile)
raise Racecar::Error, "No pidfile specified" if pidfile.nil?
@pidfile = pidfile
end
def pidfile?
!pidfile.nil?
end
def daemonize!
exit if fork
Process.setsid
exit if fork
Dir.chdir "/"
end
def redirect_output(logfile)
FileUtils.mkdir_p(File.dirname(logfile), mode: 0755)
FileUtils.touch(logfile)
File.chmod(0644, logfile)
$stderr.reopen(logfile, 'a')
$stdout.reopen($stderr)
$stdout.sync = $stderr.sync = true
end
def suppress_input
$stdin.reopen('/dev/null')
end
def suppress_output
$stderr.reopen('/dev/null', 'a')
$stdout.reopen($stderr)
end
def check_pid
if pidfile?
case pid_status
when :running, :not_owned
$stderr.puts "=> Racecar is already running with that PID file (#{pidfile})"
exit(1)
when :dead
File.delete(pidfile)
end
end
end
def pid
if File.exists?(pidfile)
File.read(pidfile).to_i
else
nil
end
end
def running?
pid_status == :running || pid_status == :not_owned
end
def stop!
Process.kill("TERM", pid)
end
def pid_status
return :exited if pid.nil?
return :dead if pid == 0
# This will raise Errno::ESRCH if the process doesn't exist.
Process.kill(0, pid)
:running
rescue Errno::ESRCH
:dead
rescue Errno::EPERM
:not_owned
end
def write_pid
File.open(pidfile, ::File::CREAT | ::File::EXCL | ::File::WRONLY) do |f|
f.write(Process.pid.to_s)
end
at_exit do
File.delete(pidfile) if File.exists?(pidfile)
end
rescue Errno::EEXIST
check_pid
retry
end
end
end
Version data entries
18 entries across 18 versions & 1 rubygems