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Top Forums Programming Arduino UNIX Time - Syncing Computer UNIX Time to Arduino Time with Python Post 303042425 by Neo on Tuesday 24th of December 2019 03:34:02 AM
Old 12-24-2019
Also, on macOS, I added this to launchd so it would sync the unix time with the Arduino UNO on startup:

Code:
macOS:LaunchDaemons# ls -l *neo*
-rw-r--r--  1 root  wheel  453 Dec 24 15:30 com.neo.startup.plist

Code:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
        <key>Label</key>
        <string>com.neo.startup</string>
        <key>ProgramArguments</key>
        <array>
                <string>/usr/bin/python</string>
                <string>/usr/local/bin/neo/checkArduino.py</string>
        </array>
        <key>StartInterval</key>
        <integer>1</integer>
</dict>
</plist>

Code:
macOS:LaunchDaemons# launchctl load -w /Library/LaunchDaemons/com.neo.startup.plist

Unfortunately, because this python script is not a "proper" macOS launch daemon, it will not "keep alive", so I still use cron for that. Maybe I'll find a way to fix this later. Maybe I need to move it to LaunchScripts versus LaunchDaemons? Anyway.... think I'll "call it good" on the unix time sync experiment for now... and as we all know....

It's only rock and roll, and I like it.
 

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SystemStarter(8)					    BSD System Manager's Manual 					  SystemStarter(8)

NAME
SystemStarter -- Start, stop, and restart system services SYNOPSIS
SystemStarter [-gvxdDqn] [action [service]] DESCRIPTION
The SystemStarter utility is deprecated. System services should instead be described by a launchd.plist(5). See launchd(8) for more details. The launchd utility is available on Mac OS X 10.4 and later. In earlier versions of Mac OS X, the SystemStarter utility is used to start, stop, and restart the system services which are described in the /Library/StartupItems/ and /System/Library/StartupItems/ paths. The optional action argument specifies which action SystemStarter performs on the startup items. The optional service argument specifies which startup items to perform the action on. If no service is specified, all startup items will be acted on; otherwise, only the item pro- viding the service, any items it requires, or any items that depend on it will be acted on. During boot SystemStarter is invoked by launchd(8) and is responsible for starting all startup items in an order that satisfies each item's requirements. ACTIONS
start start all items, or start the item that provides the specified service and all items providing services it requires. stop stop all items, or stop the item that provides the specified service and all items that depend on it. restart restart all items, or restart the item providing the specified service. OPTIONS
-g (ignored) -v verbose (text mode) startup -x (ignored) -r (ignored) -d print debugging output -D print debugging output and dependencies -q be quiet (disable debugging output) -n don't actually perform action on items (no-run mode) NOTES
Unless an explicit call to ConsoleMessage is made, SystemStarter examines the exit status of the startup item scripts to determine the suc- cess or failure of the services provided by that script. FILES
/Library/StartupItems/ User-installed startup items. /System/Library/StartupItems/ System-provided startup items. SEE ALSO
ConsoleMessage(8), launchd(8), launchd.plist(5), rc(8) HISTORY
The SystemStarter utility appeared in Darwin 1.0 and was extended in Darwin 6.0 to support partial startup and interprocess communication. SystemStarter was deprecated by launchd(8) in Darwin 8.0. Darwin April 12, 2002 Darwin
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