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.\" ========================================================================
.\"
.IX Title "Net::Server::Daemonize 3"
.TH Net::Server::Daemonize 3 "2014-05-06" "perl v5.16.3" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.SH "NAME"
Net::Server::Daemonize \- Safe fork and daemonization utilities
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\&    use Net::Server::Daemonize qw(daemonize);
\&
\&    daemonize(
\&      \*(Aqnobody\*(Aq,                 # User
\&      \*(Aqnobody\*(Aq,                 # Group
\&      \*(Aq/var/state/mydaemon.pid\*(Aq # Path to PID file \- optional
\&    );
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
This module is intended to let you simply and safely daemonize your
server on systems supporting the \s-1POSIX\s0 module. This means that your
Perl script runs in the background, and it's process \s-1ID\s0 is stored in a
file so you can easily stop it later.
.SH "EXPORTED FUNCTIONS"
.IX Header "EXPORTED FUNCTIONS"
.IP "daemonize" 4
.IX Item "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
\&\s-1STDIN, STDOUT\s0 and \s-1STDERR,\s0 separate from the process group (become
session leader), and install \f(CW$SIG\fR{\s-1INT\s0} to remove the pid file.  In
otherwords \- daemonize.  All errors result in a die.  As of version
0.89 the pid_file is optional.
.IP "safe_fork" 4
.IX Item "safe_fork"
Block \s-1SIGINT\s0 during fork.  No arguments.  Returns pid of forked child.
All errors result in a die.
.IP "set_user" 4
.IX Item "set_user"
Become another user and group.  Arguments are user (or userid) and
group (or group id or space delimited list of groups).
.IP "set_uid" 4
.IX Item "set_uid"
Become another user.  Argument is user (or userid).  All errors die.
.IP "set_gid" 4
.IX Item "set_gid"
Become another group.  Arguments are groups (or group ids or space
delimited list of groups or group ids).  All errors die.
.IP "get_uid" 4
.IX Item "get_uid"
Find the uid.  Argument is user (userid returns userid).  Returns
userid.  All errors die.
.IP "get_gid" 4
.IX Item "get_gid"
Find the gids.  Arguments are groups or space delimited list of
groups.  All errors die.
.IP "is_root_user" 4
.IX Item "is_root_user"
Determine if the process is running as root.  Returns 1 or undef.
.IP "check_pid_file" 4
.IX Item "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 \*(L"ps\*(R" command (\s-1BSD\s0 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.
.IP "create_pid_file." 4
.IX Item "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.
.IP "unlink_pid_file" 4
.IX Item "unlink_pid_file"
Does just that.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
Net::Server.
Net::Daemon, The Perl Cookbook Recipe 17.15.
.SH "AUTHORS"
.IX Header "AUTHORS"
Jeremy Howard <j+daemonize@howard.fm>
.PP
Program flow, concepts and initial work.
.PP
Paul Seamons <paul@seamons.com>
.PP
Code rework and componentization.
Ongoing maintainer.
.SH "LICENSE"
.IX Header "LICENSE"
.Vb 4
\&  This package may be distributed under the terms of either the
\&  GNU General Public License
\&    or the
\&  Perl Artistic License
\&
\&  All rights reserved.
.Ve