Shutdown and restart

Since the Pi has no reset button – if something goes wrong, and it needs to be restarted, only option is the power plug.

But if the machine does not hang yet – shutdown from Desktop offers a restart option. But when working headless, it would be good to also have a CLI shutdown restart option – similar to Linux.

Would it be a big effort to modify *ShutDown command to take a -restart option?

TaskManager_Shutdown is your friend.

One line of BASIC will do the trick:

SYS "TaskManager_Shutdown",160

If you want to avoid Message_PreQuit, that becomes SYS "TaskManager_Shutdown",162

Since the Pi has no reset button

While working on some assembler, which tended to crash the pi, I soldered a 2-pin header to the pi (there are pads provided for this) and plugged a reset button in to that.

If you want to avoid Message_PreQuit, that becomes SYS “TaskManager_Shutdown”,162

Would that avoid the message about files in RAM? If so, it gets round a problem I had to solve first by creating a file in RAM (in case there wasn’t one), then *deleting the contents of RAM, then restarting.

Would that avoid the message about files in RAM? If so, it gets round a problem I had to solve first by creating a file in RAM (in case there wasn’t one), then *deleting the contents of RAM, then restarting.

Would the Wipe command not have served instead, or X Delete to avoid errors in case of there being no file?

Or have I misunderstood?

All Pi are support a hardware reset button but the jumper are different.

If you can use a starcommand, you use a keyboard?
[CTRL]+[Break] perform a reset
In Basic also works SYS “OS_Reset”.

Would that avoid the message about files in RAM?

No, you’d have to resort to OS_Reset which is something of a “cut everything off at the knees” command.

EDIT: Ninja’d by Raik… sorry!

The advantage of SYS “TaskManager_Shutdown”,160 is that RISC is shut down tidily, exactly as if you had used CTRL-SHIFT-f12, i.e. saving CMOS etc. before restarting. With hardware power control it is the tidiest way to switch off under software control. Use 162 if there is no keyboard, mouse or monitor.

Would the Wipe command not have served instead, or X Delete to avoid errors in case of there being no file?
bq. Or have I misunderstood?

It could be me that misunderstood. The issue I had was that I could not find a command which would delete all files from RAM, and not issue an error if there were no files there. It was a while ago but I’m sure I tested *delete and *wipe. In the end I created a file, then did a delete (or possibly a wipe) of all, before shutting down.

The code I use is below. I see that I’m already using 162 (actually 34 – does bit 7 ‘Skip running of PostDesk scripts’ stop the messages?), and it doesn’t suppress the message. I see I found a way to avoid the error message without needing to create a file first.

DEF PROCshutdown(restart%)
LOCAL flags%
flags%=1 + (1<<1)
REM wipe discs, force, no verbose, X to suppress "EMPTY" error
SYS "XOS_FSControl",27,"RAM::RamDisc0.$.*",,flags% TO ;flags%
REM don't send pre-quit
flags%=1<<1
IF restart% THEN flags% += (1<<5)
REM don't use flag bit 6, power off, as it silently fails to shut down if
REM the hardware doesn't allow it.
SYS "XTaskManager_Shutdown",flags% TO ;flags%
ENDPROC

@ Alan Adams

The issue I had was that I could not find a command which would delete all files from RAM, and not issue an error if there were no files there.

If that’s the issue you had then you could have used:

IfThere RAM::RamDisc0.$.* Then wipe RAM::RamDisc0.$.* FR~C~V

That should do exactly what you want and if there are no files or directories in the RAM disc then it won’t do anything.

Just my 0.5.c, hope this helps!

If that’s the issue you had then you could have used:

IfThere RAM::RamDisc0.$.* Then wipe RAM::RamDisc0.$.* FR~C~V

That should do exactly what you want and if there are no files or directories in the RAM disc then it won’t do anything.

X Wipe RAM::RamDisc0.$.* FR~C~V