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Contents
# encoding: utf-8
# This is largely based on the Daemonize library by Travis Whitton and
# Judson Lester. http://grub.ath.cx/daemonize. I cleaned it up a bit to
# meet Adhearsion's quality standards.
module Adhearsion
module CustomDaemonizer
# Try to fork if at all possible retrying every 5 sec if the
# maximum process limit for the system has been reached
def self.safefork
begin
pid = fork
return pid if pid
rescue Errno::EWOULDBLOCK
sleep 5
retry
end
end
# This method causes the current running process to become a daemon
def self.daemonize(log_file = '/dev/null')
srand # Split rand streams between spawning and daemonized process
# Fork, then exit when the child has exited below
if pid = safefork
::Process.wait pid
exit
end
# Detach from the controlling terminal
raise 'Cannot detach from controlled terminal' unless sess_id = ::Process.setsid
# Prevent the possibility of acquiring a controlling terminal
# Fork again, allow a PID file to be written, then exit
trap 'SIGHUP', 'IGNORE'
if pid = safefork
yield pid if block_given?
exit
end
Dir.chdir "/" # Release old working directory
File.umask 0000 # Ensure sensible umask
STDIN.reopen "/dev/null"
STDOUT.reopen '/dev/null', "a"
STDERR.reopen log_file, "a"
return sess_id
end
end
end
Version data entries
19 entries across 19 versions & 1 rubygems