What commands show pending/scheduled tasks in Terminal?

Question

I'm currently trying to receive the DateTime from a Xamarin.Forms.TimePicker. I just want to populate the model which is a DateTime pickerTime variable. This variable will be populated by whatever is in the TimePicker view.

Therefore I need to do OneWayToSource data binding but I only ever find examples in XAML, where as I'm working in C# file because its an Android custom render of a abstract Xamarin.Forms Page.

Is there any way to OneWayToSource data bind in C#? If not I would try making the Forms View page type of my abstract sub-classed page so I have access to a XAML page and make the TimePicker view as well the data bound object in there that the Custom Renderer Pages inherit with OneWayToSource data binding.

Thanks for your help!

Solution

There is util called cron. Usually cron handle task scheduling in Linux. But there is also few another ways to do it.

In case of cron, you can just run crontab -l to see all task scheduled by current user.

If you want to check task for another user use -u $username key

TO check root user tasks: sudo crontab -u root -l

To understand crontab format please read wiki

If you want to detect exactly system shutdown

The one of possible solutions is to wrap shutdown command in a script.

Another solution is to write a trap detecting SIGTERM signal, but this solution do not give you time when system will start halting. Read about trap here

Also there is another one tricky solution:

If you run sudo shutdown -r 20:00, you spawn a process that will start shutdown at 20:00.

You can find this process using ps

$ ps -ef | grep shutdown
root     32222 32032  0 15:55 pts/8    00:00:00 sudo shutdown -r 20:00
root     32223 32222  0 15:55 pts/8    00:00:00 shutdown -r 20:00
c0rp     32382 32233  0 15:55 pts/10   00:00:00 grep --color=auto shutdown

And you can see a time here. If you kill this process, shutdown will be canceled

Comments

[JoKeR]

thanks for the link to wiki documentation its helpful but for example I just run sudo shutdown -r 20:00 for example and when I run any of your suggested commands it says no crontab for root so my question is how can I list command like that in case I forgot about that it was supposed to restart at 20:00 or any other hour.

[JoKeR]

Thank you! ps works just great :-)

[B Best]

Looking online it seems that the TimeProperty is of type TimeSpan. Is there a way to get this to DateTime type?

[B Best]

Or rather will using the Ticks operation on the TimeSpan give me the time in milliseconds as a long since that is what I need in the end.

[TaiT's]

@BBest If you need the date and time, just go for a DateTimePicker control. It's easy to adapt this piece of code with your suitable control.

[B Best]

It's for gettin the time for an alarm so is it even necessary to get the date?

[TaiT's]

It really depends on your business needs. I.e. If a future implementation needs the ability to set up an alarm the following day/week/month instead of the current day. It's up to you!

[B Best]

Ahh good point, probably useful for repeating alarms on certain days