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# Daemonize code provided by Travis Whitton
#
# http://grub.ath.cx/daemonize/
module Daemonize
#VERSION = "0.1.2"
# Try to fork if at all possible retrying every 5 sec if the
# maximum process limit for the system has been reached
def safefork
tryagain = true
while tryagain
tryagain = false
begin
if pid = fork
return pid
end
rescue Errno::EWOULDBLOCK
sleep 5
tryagain = true
end
end
end
# This method causes the current running process to become a daemon
#
# If closefd is true, all existing file descriptors are closed
def daemonize(oldmode=0, closefd=false)
srand # Split rand streams between spawning and daemonized process
safefork and exit # Fork and exit from the parent
# Detach from the controlling terminal
unless sess_id = Process.setsid
raise 'Cannot detach from controlled terminal'
end
# Prevent the possibility of acquiring a controlling terminal
if oldmode.zero?
trap 'SIGHUP', 'IGNORE'
exit if pid = safefork
end
Dir.chdir "/" # Release old working directory
File.umask 0000 # Insure sensible umask
if closefd
# Make sure all file descriptors are closed
ObjectSpace.each_object(IO) do |io|
unless [STDIN, STDOUT, STDERR].include?(io)
io.close rescue nil
end
end
end
STDIN.reopen "/dev/null" # Free file descriptors and
STDOUT.reopen "/dev/null", "a" # point them somewhere sensible
STDERR.reopen STDOUT # STDOUT/STDERR should go to a logfile
return oldmode ? sess_id : 0 # Return value is mostly irrelevant
end
end
Version data entries
24 entries across 24 versions & 1 rubygems