.Dd September 30, 2004
.Dt launchd 8 
.Os Darwin
.Sh NAME
.Nm launchd
.Nd System wide and per-user daemon/agent manager
.Sh SYNOPSIS
.Nm
.Op Fl d
.Op Fl v
.Op Fl s
.Op Fl x
.Op Ar -- command Op Ar args ...
.Sh DESCRIPTION
.Nm 
manages daemons, both for the system as a whole and for individual users. Ideal daemons can launch
on demand based on criteria specified in their respective XML property lists located in one of the
directories specified in the FILES section.
.Pp
When run with a command, a specific instance of
.Nm
is created and the command is implicitly added to the list of jobs maintained by
.Nm .
If the command exits, that instance of
.Nm
will clean up all jobs maintained by itself and exit. All children of the command will use that
instance of
.Nm .
.Pp
During boot 
.Nm
is invoked by the kernel to run as the first process on the system and to further bootstrap the rest of the system.
.Sh OPTIONS WHEN RUN AS PID 1
.Bl -tag -width -indent
.It Fl d
Daemonize. Useful when passing a command to launchd on the command line.
.It Fl v
Verbose boot.
.It Fl s
Single user mode. Instructs
.Nm launchd
to give a shell prompt before booting the system.
.It Fl x
Safe mode boot. Instructs the system to boot conservatively.
.El
.Sh ENVIRONMENTAL VARIABLES
.Bl -tag -width -indent
.It Pa LAUNCHD_SOCKET
This variable is exported when invoking a command via the launchd command line. It informs launchctl how to find the correct launchd to talk to.
.El
.Sh NOTES
In Darwin it is preferable to have your daemon launch via launchd instead of modifying
.Nm rc
or creating a
.Nm SystemStarter
Startup Item.
.Pp
At some point in the future, we hope to completely phase out the use of
.Nm rc .
.Sh FILES
.Bl -tag -width "/System/Library/LaunchDaemons" -compact
.It Pa ~/Library/LaunchAgents
Per-user agents provided by the user.
.It Pa /Library/LaunchAgents
Per-user agents provided by the administrator.
.It Pa /Library/LaunchDaemons
System wide daemons provided by the administrator.
.It Pa /System/Library/LaunchAgents
Mac OS X Per-user agents.
.It Pa /System/Library/LaunchDaemons
Mac OS X System wide daemons.
.El
.Sh SEE ALSO 
.Xr launchctl 1 ,
.Xr launchd.plist 5 ,
.Xr rc 8 ,
.Xr SystemStarter 8