Is there a way to get a user-defined launchd task (i.e. like the one in this question) to get user confirmation before executing the task? A popup like the one for scheduled sleep (with yes/no and a timer in case of no user input) would be great, otherwise a simple yes/no popup would work.
Make launchd call this AppleScript. It displays a dialog with a timeout and calls a shell script if the user selected "Ok".
set timeoutInSeconds to 60 set abortOnTimeout to true tell application (path to frontmost application as text) try set dialogResult to display dialog "Do you want to execute?" default button 2 giving up after timeoutInSeconds on error number -128 return end try end tell if gave up of dialogResult and abortOnTimeout then return end if do shell script "/path/to/yourscript.sh"
Launchd agents are allowed to interact with the GUI, and even daemons can use osascript to display dialogs.
You could also use something like this in a shell script:
osascript -e 'tell app (path to frontmost application as text)' display dialog "Continue?" end' || exit 0
The script exits with an error if the user presses the cancel button or closes the dialog. You could also tell a background process like SystemUIServer to display the dialog, but you'd have to add something like
activate application (path to frontmost application as text) to move focus back to the previously focused window.