how to let launchd launch a system daemon?


试试 launchctl load 或 launchctl start

一般在 /Library/LaunchDaemons

➜  Bootstrap launchctl --help
Unrecognized subcommand: --help
Usage: launchctl <subcommand> ... | help [subcommand]
Many subcommands take a target specifier that refers to a domain or service
within that domain. The available specifier forms are:

Targets the system-wide domain or service within. Root privileges are required
to make modifications.

Targets the user domain or service within. A process running as the target user
may make modifications. Root may modify any user's domain. User domains do not
exist on iOS.

Targets the GUI domain or service within. Each GUI domain is associated with a
user domain, and a process running as the owner of that user domain may make
modifications. Root may modify any GUI domain. GUI domains do not exist on iOS.

Targets a session domain or service within. A process running within the target
security audit session may make modifications. Root may modify any session

Targets a process domain or service within. Only the process which owns the
domain may modify it. Even root may not do so.

When using a legacy subcommand which manipulates a domain, the target domain is
inferred from the current execution context. When run as root (whether it is
via a root shell or sudo(1)), the target domain is assumed to be the
system-wide domain. When run from a normal user's shell, the target is assumed
to be the per-user domain for that current user.

	bootstrap       Bootstraps a domain or a service into a domain.
	bootout         Tears down a domain or removes a service from a domain.
	enable          Enables an existing service.
	disable         Disables an existing service.
	kickstart       Forces an existing service to start.
	attach          Attach the system's debugger to a service.
	debug           Configures the next invocation of a service for debugging.
	kill            Sends a signal to the service instance.
	blame           Prints the reason a service is running.
	print           Prints a description of a domain or service.
	print-cache     Prints information about the service cache.
	print-disabled  Prints which services are disabled.
	plist           Prints a property list embedded in a binary (targets the Info.plist by default).
	procinfo        Prints port information about a process.
	hostinfo        Prints port information about the host.
	resolveport     Resolves a port name from a process to an endpoint in launchd.
	limit           Reads or modifies launchd's resource limits.
	runstats        Prints performance statistics for a service.
	examine         Runs the specified analysis tool against launchd in a non-reentrant manner.
	config          Modifies persistent configuration parameters for launchd domains.
	dumpstate       Dumps launchd state to stdout.
	dumpjpcategory  Dumps the jetsam properties category for all services.
	reboot          Initiates a system reboot of the specified type.
	bootshell       Brings the system up from single-user mode with a console shell.
	load            Recommended alternatives: bootstrap | enable. Bootstraps a service or directory of services.
	unload          Recommended alternatives: bootout | disable. Unloads a service or directory of services.
	remove          Unloads the specified service name.
	list            Lists information about services.
	start           Starts the specified service.
	stop            Stops the specified service if it is running.
	setenv          Sets the specified environment variables for all services within the domain.
	unsetenv        Unsets the specified environment variables for all services within the domain.
	getenv          Gets the value of an environment variable from within launchd.
	bsexec          Execute a program in another process' bootstrap context.
	asuser          Execute a program in the bootstrap context of a given user.
	submit          Submit a basic job from the command line.
	managerpid      Prints the PID of the launchd controlling the session.
	manageruid      Prints the UID of the current launchd session.
	managername     Prints the name of the current launchd session.
	error           Prints a description of an error.
	variant         Prints the launchd variant.
	version         Prints the launchd version.
	help            Prints the usage for a given subcommand.

launchctl kickstart system/
发现可以!多谢 :grinning:

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