Launchdaemons For Gui App Mac OS X Tiger
Launchdaemons For Gui App How To Obtain Information
Launchdaemons For Gui App Mac OS X Tiger And

Simple Example (using WSO2 API Manager) In this article, I am hoping to run a WSO2 API Manager server as a service on macOS system as an example to understand above explained methods.

Kosala Sananthana Follow May 29, 2019 5 min read In computing, launchd, a unified operating system service management framework, starts, stops and manages daemons, applications, processes, and scripts in macOS.

Launchdaemons For Gui App Mac OS X Tiger And

Launchdaemons For Gui App Mac OS X Tiger

It was introduced with Mac OS X Tiger and is licensed under the Apache License.

Wikipedia If youve familiar with any version of Linux, surely you have worked with cron jobs.

Other than executing scripts cron-style, launchd does a lot more.

Like systemd on Linux, launchd is a replacement for a lot of old school Unix tools, like init, inetd, cron, etc.

Daemons are system-wide services that always run in the background, while agents describe regular services that are to be executed on user-specific events.

Daemons and agents are managed by launchd framework which can be controlled using the launchctl terminal command.

There are two main components in the launchd service creating process that you will need to follow.

Job Definition The behavior of a daemons or agents are defined in a special XML file called a property list (.plist ) file.

Depending on where it is stored it will be treated as a daemon or an agent.

Image by launchd.info launchd supports more than 36 different configuration keys in property list file and only main keys that required for a basic service are described in the below.

Label This required key uniquely identifies the job to launchd.

If this key is missing, then the first element of the array of strings provided to the ProgramArguments will be used instead.

This key is required in the absence of the ProgramArguments key.

ProgramArguments of strings Use this one if your executable requires command line options.

RunAtLoad This optional key is used to control whether your job is launched once at the time the job is loaded.

StartInterval This optional key causes the job to be started every N seconds.

If the system is asleep, the job will be started the next time the computer wakes up.

If multiple intervals transpire before the computer is woken, those events will be coalesced into one event upon wake from sleep.

StartCalendarInterval of integers or array of dictionary of integers This optional key causes the job to be started every calendar interval as specified.

Weekday The weekday on which this job will be run (0 and 7 are Sunday).

Please refer launchd.plist(5) manual or launchd.info for detailed definitions of other keys in property list files.

Please note: property list files are expected to have their name end in.plist.

Also please note that it is the expected convention for launchd property list files to be named.plist.

Thus, as an example if your job label is org.wso2.am, your plist file should be named org.wso2.am.plist.

Launchdaemons For Gui App How To Obtain Information

Operations This section will define how to obtain information about launchd services and how to load, unload, start and stop those jobs.

All of this can be accomplished using the command line utility launchctl.

Getting information about available (loaded) jobs: launchctl list Getting information about a given job: launchctl list grep Loading a job ( a global daemon ): launchctl load LibraryLaunchDaemons.plist Unloading a job ( a global daemon ): launchctl unload LibraryLaunchDaemons.plist Starting a job ( a loaded job ): launchctl start Stoping a job ( a loaded job ): launchctl stop Restarting a job ( a loaded job ): launchctl restart Please note: If you are working with Daemon job please use sudo permission with above commands.

Mac Launchdaemons For Gui App