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LEARN ABOUT MOJAVE

net::server::daemonize5.18

Net::Server::Daemonize(3)				User Contributed Perl Documentation				 Net::Server::Daemonize(3)

NAME

       Net::Server::Daemonize - Safe fork and daemonization utilities

SYNOPSIS

	   use Net::Server::Daemonize qw(daemonize);

	   daemonize(
	     'nobody',		       # User
	     'nobody',		       # Group
	     '/var/state/mydaemon.pid' # Path to PID file - optional
	   );

DESCRIPTION

       This module is intended to let you simply and safely daemonize your server on systems supporting the POSIX module. This means that your
       Perl script runs in the background, and it's process ID is stored in a file so you can easily stop it later.

EXPORTED FUNCTIONS

       daemonize
	   Main routine.  Arguments are user (or userid), group (or group id or space delimited list of groups), and pid_file (path to file).
	   This routine will check on the pid file, safely fork, create the pid file (storing the pid in the file), become another user and group,
	   close STDIN, STDOUT and STDERR, separate from the process group (become session leader), and install $SIG{INT} to remove the pid file.
	   In otherwords - daemonize.  All errors result in a die.  As of version 0.89 the pid_file is optional.

       safe_fork
	   Block SIGINT during fork.  No arguments.  Returns pid of forked child.  All errors result in a die.

       set_user
	   Become another user and group.  Arguments are user (or userid) and group (or group id or space delimited list of groups).

       set_uid
	   Become another user.  Argument is user (or userid).	All errors die.

       set_gid
	   Become another group.  Arguments are groups (or group ids or space delimited list of groups or group ids).  All errors die.

       get_uid
	   Find the uid.  Argument is user (userid returns userid).  Returns userid.  All errors die.

       get_gid
	   Find the gids.  Arguments are groups or space delimited list of groups.  All errors die.

       is_root_user
	   Determine if the process is running as root.  Returns 1 or undef.

       check_pid_file
	   Arguments are pid_file (full path to pid_file).  Checks for existance of pid_file.  If file exists, open it and determine if the
	   process that created it is still running.  This is done first by checking for a /proc file system and second using a "ps" command (BSD
	   syntax).  (If neither of these options exist it assumed that the process has ended) If the process is still running, it aborts.
	   Otherwise, returns true.  All errors die.

       create_pid_file.
	   Arguments are pid_file (full path to pid_file).  Calls check_pid_file.  If it is successful (no pid_file exists), creates a pid file
	   and stores $$ in the file.

       unlink_pid_file
	   Does just that.

SEE ALSO

       Net::Server.  Net::Daemon, The Perl Cookbook Recipe 17.15.

AUTHORS

       Jeremy Howard <j+daemonize@howard.fm>

       Program flow, concepts and initial work.

       Paul Seamons <paul@seamons.com>

       Code rework and componentization.  Ongoing maintainer.

LICENSE

	 This package may be distributed under the terms of either the
	 GNU General Public License
	   or the
	 Perl Artistic License

	 All rights reserved.

perl v5.18.2							    2012-05-29						 Net::Server::Daemonize(3)

UNIX for Dummies Questions & Answers