Sha256: c4b7c4445207671975342d29edd12051b9bb5b93b06370d1ac0d2e63c421b5cb
Contents?: true
Size: 1.56 KB
Versions: 15
Compression:
Stored size: 1.56 KB
Contents
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
15 entries across 15 versions & 4 rubygems